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  • Biology  (6,737)
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  • 2020-2022  (7,382)
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  • 1
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    Deutsche Geophysikalische Gesellschaft, Hamburg
    In:  Herausgeberexemplar
    Publication Date: 2021-08-07
    Description: Die Jubiläumsschrift zum 75jährigen Bestehen der Deutschen Geophysikalischen Gesellschaft (DGG) enthält zahlreiche Beiträge von Mitgliedern zu vier Schwerpunkten: 1) Eine Aktualisierung der Geschichte der DGG vor allem zu den an Ereignissen reichen letzten 25 Jahren sowie Ergänzungen zu vorausgegangenen Darstellungen. 2) Die Darstellung der Geschichte geophysikalischer Institute und Institutionen in Deutschland inklusive eines Rückblicks auf das erfolgreiche Wirken ihrer verdienstvollen Persönlichkeiten. 3) Die Beschreibung einer Auswahl in der deutschen Geophysik angegangener Großprojekte der letzten 25 Jahre. 4) In Anlehnung an die Festschrift zum 50jährigen Gründungsjubiläum ist schließlich noch ein Kapitel zu geophysikalischen 'Detailthemen' ausgeführt. In ihm sind auch Beiträge enthalten, die Traditionslinien bzw. Arbeiten betreffen, die in der früheren DDR aufgenommen worden waren und z.T. keine direkte Fortsetzung an einer Nachfolgeinstitution gefunden haben.
    Description: commemorativepublication
    Keywords: 550 ; Geschichte der Geophysik ; Festschriften {Geophysik} ; Deutsche Geophysikalische Gesellschaft ; Deutschland ; Geophysik ; Geschichte ; FID-GEO-DE-7
    Language: German
    Type: anthology_digi
    Format: 226 S.
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  • 2
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    DGG, [Münster]
    In:  Herausgeberexemplar
    Publication Date: 2021-05-06
    Description: Wird heute genug für die wissenschaftliche und technologische Steuerung des sich immer rasanter vollziehenden globalen und regionalen Wandels der Bio- und Geosphäre getan? Hat die internationale Gemeinschaft die Kraft zu einem sinnvollen, übergreifenden "Umwelt-Management"? Geophysik kann auf Grund ihrer interdisziplinären Stellung innerhalb der Naturwissenschaften und mit ihren vielfältigen Beziehungen zur Technik zum effizienten Einsatz der Kräfte und Mittel beitragen - in einer Zeit weltweiter sozialer, politischer und eben auch ökologischer Konflikte. Geophysik kann notwendige Prioritäten wissenschaftlich begründen und verfechten und somit helfen, weittragende und konsensfähige Entscheidungen vorzubereiten, um gesellschaftliche Akzeptanz und Unterstützung für die Politik zu erreichen. Die Deutsche Geophysikalische Gesellschaft - getragen von ihrer Verantwortung um den Beitrag der Geophysik für die gemeinsame Zukunft - wendet sich im 75. Jahr ihres Bestehens mit dieser Denkschrift an die Öffentlichkeit. Teil I enthält einen Überblick zur Spezifik, zur Stellung, zu den Zielen und zur Bedeutung der Geophysik. Im Teil II stellen führende Geophysiker ausgewählte Beispiele moderner geophysikalischer Forschung vor. Teil III ist statistisch angelegt und gibt einen kurzen Überblick zu den in Deutschland angesiedelten Institutionen geophysikalischer Lehre und Forschung. Die Denkschrift "Mit Geophysik in die Zukunft" will Politiker, Industrielle, Wissenschaftler, Vertreter der Medien und interessierte Bürger erreichen, um im Interesse des Gemeinwohls zu angemessener Wissenschaftsförderung und kluger Zukunftsgestaltung beizutragen.
    Description: commemorativepublication
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Wissenschaftsorganisation und -pflege {Geophysik} ; Geophysik ; Wissenschaft ; Forschung ; Deutschland ; FID-GEO-DE-7
    Language: German
    Type: anthology_digi
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  • 3
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11019 | 196 | 2013-03-18 20:05:12 | 11019 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L.; G. FABIANO; S. B. SVERLIJ; A. DOMÁNICO; C. FUENTES & J. PONTE GÓMEZ. 2012. Ictiólogos de la Argentina: Alberto Espinach Ros. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(40): 1-55. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Biography ; Biografía ; Ichthyologists ; Ictiólogos ; Alberto Espinach Ros
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 55
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  • 4
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  http://aquaticcommons.org/id/eprint/11015 | 196 | 2013-03-18 20:21:01 | 11015 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historicalcircumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Keywords: Biology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 17
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  • 5
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11016 | 196 | 2013-03-18 20:10:00 | 11016 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L; G. G. GARRIDO & J. PONTE GÓMEZ. 2012. Ictiólogos de la Argentina: Enrique Darío Permingeat. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(37): 1 34. ISSN 1515-9329
    Keywords: Biology ; Argentina ; Biography ; Biografía ; Ichthyologist ; Ictiólogos ; Enrique Darío Permingeat
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 34
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  • 6
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11017 | 196 | 2013-03-18 20:08:30 | 11017 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L; HUGO CASTELLO & J. PONTE GÓMEZ. 2012. Ictiólogos de la Argentina: Aurelio Juan Santiago Pozzi. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(38): 1-47. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Biography ; Biografía ; Ichthyologysts ; Ictiólogos ; Aurelio Juan Santiago Pozzi
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 47
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  • 7
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    South West Water Authority | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11139 | 1256 | 2013-04-11 16:54:51 | 11139 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the Biological survey of River Teign and tributaries with references to the discharge of ball clay wastes, document produced by South West Water Authority in 1973. This report focuses on on-site assessment of the benthic macro-invertebrates of the lower River Teign, River Bovey, Ugbrooke Stream and Blatchford Brook was undertaken on 19th and 22nd August 1977 to assess the effects of discharges from ball clay mining premises. Inspection of aquatic fauna in the field is of necessity, less extensive than laboratory identification of sorted samples, so that the resulting data underestimates the water quality. This is more pronounced in the Chandler Score than in the Trent Biotic Index which does not take account of species abundance. Chandler should thus be interpreted by the trends described rather than by absolute values calculated.
    Description: Environment Agency Archives South West
    Description: + tables and maps
    Keywords: Ecology ; Limnology ; Pollution ; England ; River Teign ; Inland waters ; Invertebrates ; Environmental assessment ; Freshwater pollution ; Water quality ; Fishery surveys
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 2
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  • 8
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10595 | 1256 | 2013-02-15 14:57:47 | 10595 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the first Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1965, to the end of March 1966. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Marron, Irt, Esk, Eden, Caldew, Petteril, Eamont and Annas. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent, and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. It also looks at fish hatchery, fisheries protection and byelaws including licence numbers issued for the different districts. The fourth section on pollution deals with water quality of the rivers and their tributaries from the same 5 areas mentioned above. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 65
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  • 9
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10597 | 1256 | 2013-02-15 14:57:00 | 10597 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the third Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1967, to the end of March 1968. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Glenderamackin, Marron, Eden, Caldew, and Lyvennet. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken from rivers Eden, Eamont, Petteril, Caldew, Calder, Derwent, Ehen, Ellen, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 85
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  • 10
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10598 | 1256 | 2013-02-15 14:56:36 | 10598 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the fourth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1968, to the end of March 1969. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Marron, Ellen, Eden, Caldew, Esk, Annas, Irt and Glenderamackin. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, Brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution covers water quality, and the results of samples taken from rivers Eden, Eamont, Petteril, Caldew, Calder, Derwent, Ehen, Ellen, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 87
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  • 11
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10601 | 1256 | 2013-02-15 14:55:18 | 10601 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the seventh Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1971, to the end of March 1972. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Derwent and Eden. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken for chemical analysis from rivers Eden, Eamont, Petteril, Caldew, Calder, Irthing, Esk, Irt, Mite, Derwent, Ehen, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 95
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  • 12
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10602 | 1256 | 2013-02-15 14:54:53 | 10602 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the eighth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1972, to the end of March 1973. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, including periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Derwent, Eden and Caldew. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken for chemical analysis from rivers Eden, Eamont, Leith, Lowther, Lyne, Petteril, Caldew, Calder, Irthing, Esk, Irt, Mite, Derwent, Ehen, Ellen, Annas, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 112
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  • 13
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10603 | 1256 | 2013-02-15 14:54:29 | 10603 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the ninth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1973, to the end of March 1974. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Glenderamackin and Lyvennet. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken for chemical analysis from rivers Eden, Eamont, Leith, Lowther, Lyne, Petteril, Caldew, Calder, Marron, Irthing, Esk, Irt, Mite, Derwent, Ehen, Ellen, Annas, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
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  • 14
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10604 | 1256 | 2013-02-15 14:54:04 | 10604 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the ninth Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1959, to the end of March 1960. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the completion of a gauging station on the River Eden, and an approval for a similar station on the River Derwent. It also gives information on rainfall and river flow. The section on land drainage looks at work on improvement schemes and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Ellen, Cocker, Irt, Esk, Annas, Marron, Eden, Eamont, Caldew and Petteril. The fisheries section covers 4 districts of the River Eden, Esk, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as re-stocking and fisheries protection. The fourth section on pollution deals with water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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  • 15
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10599 | 1256 | 2013-02-15 14:56:11 | 10599 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the fifth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1969, to the end of March 1970. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, wich includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Derwent, Ellen, Mite, Bleng, Eden, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken from rivers Eden, Eamont, Petteril, Caldew, Calder, Bleng, Derwent, Ehen, Ellen, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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  • 16
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10605 | 1256 | 2013-02-15 14:53:38 | 10605 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the tenth Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1960, to the end of March 1961. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the completion of gauging stations on the River Derwent and Eamont, and the building of a similar station on the River Esk. It also gives information on rainfall and river flow. The section on land drainage looks at work on improvement schemes and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Ellen, Cocker, Irt, Annas, Mite, Ehen, Marron, Eden, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Derwent, Ellen and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as re-stocking and fisheries protection. The fourth section on pollution deals with water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland Waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10607 | 1256 | 2013-02-15 14:52:42 | 10607 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the twelfth Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1962, to the end of March 1963. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the completion of gauging stations, abstraction of water and rainfall. The section on land drainage looks at work on improvement schemes, floods and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Ellen, Cocker, Greta, Marron, Ehen, Keekle, Esk, Bleng, Mite, Annas, Eden, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Derwent, Ellen and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as Byelaws and fisheries protection. The fourth section on pollution covers water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10606 | 1256 | 2013-02-15 14:53:11 | 10606 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the eleventh Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1961, to the end of March 1962. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the building of gauging stations, abstraction of water, and rainfall and river flow. The section on land drainage looks at work on improvement schemes and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Ellen, Cocker, Irt, Mite, Keekle, Eden, Esk, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Derwent, Ellen and South West Cumberland. It includes angling information and a general report for salmon and sea trout, Brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as Byelaws and fisheries protection. The fourth section on pollution deals with water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Cumberland River Authority | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10600 | 1256 | 2013-02-15 14:55:43 | 10600 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the sixth Annual report of the Cumberland River Authority on information of its activities and responsibilities on river management in its area between the beginning of April 1970, to the end of March 1971. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes periodical surveys, hydrometric schemes, acceptable flows, conservation works and a review of rainfall and river flow.The section on land drainage looks at work on improvement schemes, floods, charges and information on maintenance work carried out on rivers including Wampool, Waver, Derwent, Eden, Mite, Bleng, Annas and Irt. The fisheries section covers 5 districts of the River Eden, Esk, Ellen, Derwent and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as fisheries protection and licence duties. The fourth section on pollution deals with water quality, and the results of samples taken from rivers Eden, Eamont, Petteril, Caldew, Calder, Irt, Derwent, Ehen, Ellen, Wampool and Waver are also given. It also covers information on sewage and trade effluents.The River Authorities preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Authority ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Monterey Bay Aquarium Research Institute | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/10614 | 8 | 2015-04-29 21:11:23 | 10614
    Publication Date: 2021-06-27
    Keywords: Biology ; Ecology
    Repository Name: AquaDocs
    Type: book
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10608 | 1256 | 2013-02-15 14:18:44 | 10608 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the thirteenth Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1963, to the end of March 1964. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the completion of gauging stations, abstraction of water and rainfall and river flow. The section on land drainage looks at work on improvement schemes, floods and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Derwent, Cocker, Keekle, Marron, Ehen, Irt, Esk, Mite, Lowther, Eden, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Derwent, Ellen and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as Byelaws and fisheries protection. The fourth section on pollution deals with water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Cumberland River Board | Carlisle, UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10609 | 1256 | 2013-02-15 14:18:11 | 10609 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-27
    Description: This is the fourteenth Annual report of the Cumberland River Board on information of its activities and responsibilities on river management in its area between the beginning of April 1964, to the end of March 1965. The report contains 5 main sections on water resources, land drainage, fisheries, pollution, and finally the expenditure and income for the 12 month period. The first area that the report deals with is water resources, which includes information on the completion of gauging stations, abstraction of water and rainfall and river flow. The section on land drainage looks at work on improvement schemes, floods and information on maintenance work carried out on rivers including Wampool, Waver, Wiza, Ellen, Cocker, Keekle, Marron, Ehen, Bleng, Esk, Mite, Caldew and Petteril. The fisheries section covers 5 districts of the River Eden, Esk, Derwent, Ellen and South West Cumberland. It includes angling information and a general report for salmon and sea trout, brown trout and freshwater fish. Fish disease and fish hatchery are also covered as well as Byelaws and fisheries protection. The fourth section on pollution deals with water quality and information on sewage and trade effluents.The River Boards preceded the Environment Agency which came into existence in 1996.
    Description: Environment Agency Archives North West
    Keywords: Fisheries ; Limnology ; Management ; England ; Cumberland River Board ; Annual reports ; Inland waters ; Rivers ; Salmon fisheries ; Freshwater fish ; Water management ; Fish catch statistics ; Water quality ; Pollution ; Licensing ; Environmental monitoring
    Repository Name: AquaDocs
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11008 | 196 | 2013-03-18 20:26:33 | 11008 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: Prosiguiendo con la tarea de rescate de documentos realizada por ProBiota, tomamos la iniciativa de editar en este número la iconografía de la obra The dorado de J. W. Hills y G. H. Harrison ya que a nuestro entender posee un indiscutible valor histórico además de ilustrativo.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L. & J. PONTE GÓMEZ (Recopiladores) 2012. The dorado – Iconografía. Tomado de: Hills, J. W. & G. H.Harrison. 1932. The dorado. Impreso por R. MacLehase & Co. Ltd, The University Press, Glasgow; publicado por Philip Allan & Company Ltd. en Quality House, London, W.CA, Great Britain, 190 pp. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Documentos 17: 1-23. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Ichthyology ; Ictiología ; Iconography ; Iconografía
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    Type: monograph
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    Format: application/pdf
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11011 | 196 | 2013-03-18 20:22:41 | 11011 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: Continuando con el rescate de los diferentes documentos de naturalistas argentinos, se reproduce el presente relato escrito por el Dr. Emiliano Mac Donagh y que fuera publicado en el diario La Nación en la edición del 5 de mayo de 1929.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: MAC DONAGH, E. 2012. El Naturalista. Tomado del diario La Nación, edición del 5 de mayo de 1929. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 16: 1-10. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Narration ; relato ; Naturistic ; Naturalista
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11031 | 196 | 2013-03-18 20:03:25 | 11031 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L & J. PONTE GÓMEZ. 2013. Ictiólogos de la Argentina: Mariano Narciso Antonio José Castex. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(42): 1-30. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Biography ; Biografía ; Ichthñyologists ; Ictiólogos ; Mariano Narciso Antonio José Castex
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  danifuchs1@yahoo.com.ar | http://aquaticcommons.org/id/eprint/11012 | 196 | 2013-03-18 20:18:55 | 11012 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-26
    Description: Esta serie tiene como finalidad dar a conocer las especies presentes en los diferentes estados provinciales. Tomando como base los trabajos de López et al., (2003); Reis et al., (2003); Liotta (2006) y Ferraris (2007) actualizamos el elenco ictiofaunístico de cada territorio provincial. No se realizan, con excepción del nombre vulgar y localidad tipo, comentarios y/o observaciones de las especies señaladas ya que estos se encuentran en la bibliografía adjunta. Se incluyen dos tablas que contienen información sobre especies introducidas y de aquellas de presencia dudosa o que requieran confirmación en el territorio provincial. Paraéstas últimas se cita el trabajo que las menciona por vez primera.Consideramos que este modesto aporte contribuirá a precisar el conocimiento ictiofaunístico regional ya que además de la lista de especies, presentamos el marco biogeográfico e hídrico correspondiente.Por otra parte entendemos que la participación de autores involucrados en la región considerada, le da un verdadero sentido federal a esta contribución, además de reforzar vínculos en los protagonistas de nuestra especialidad.En este nuevo número presentamos la provincia de Catamarca que se encuentra enclavada en el centro-oeste de nuestro territorio, limitada por Salta, Tucumán, Santiago del Estero, Córdoba y La Rioja.Uno de los grupos mas representativos del sistema hidrográfico de Catamarca es el de los Trichomycteridae (López, 1992). Esta familia es un ejemplo de altadiversificación en áreas restringidas. Presentan una extensa distribución latitudinal y altitudinal, algunas especies viviendo en el Altiplano boliviano, a más de 4000 m s.n.m., y otras en ambientes de llanura. Las especies de estafamilia poseen alta sensibilidad a cualquier alteración del medio en que viven.Por ello, los cambios que se pudieran producir en su hábitat provocarían efectos directos sobre sus poblaciones (López et al., 1996; Monasterio de Gonzo et al., 2011).Podemos afirmar que el conocimiento de la ictiofauna de la provincia de Catamarca comienza a tomar forma a partir de fines del siglo XX ya que se produce un incremento en los relevamientos de su red hidrográfica, dando como resultado una ampliación del número de especies presentes en su territorio, sumándose desde el trabajo de Berg (1895), 24 especies de las cuales 5 son endémicas.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: FERNÁNDEZ, L.; D. V. FUCHS; D. O. NADALIN & H. L. LÓPEZ. 2012. Lista de los peces de la provincia de Catamarca. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 17: 1-11. ISSN 1515-9329
    Keywords: Biology ; Argentina ; Catamarca province ; Provincia de Catamarca ; List ; Lista ; Ichthyology ; Ictiología ; Biogeography ; Biogeografía
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    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/11164 | 1256 | 2013-09-03 13:07:23 | 11164 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-06-28
    Description: This is the final presentation from the Moston Brook Evidence and Measures project which ran from September 2012 to March 2013. Moston Brook water body is part of the River Irwell Pilot Catchment and the objective of the project was to devise reliable measures (actions) which were based on existing evidence and that could be implemented in years 2 and 3 by the Environment Agency and its partner to help meet Water Framework Directive (WDF) requirements and community aspirations. The presentation summarises the main suspected causes of WDF failure, the evidence for this, the main causes for failure in the sub-catchments resulting from the evidence found, and identifies measures to carry out, which will address the WDF failures and improve the quality of the water. This presentation can be used to inform others on how to improve the water quality of Moston Brook, and also to support other similar initiatives.
    Description: Environment Agency Archives North West
    Description: Copy of 20 powerpoint slides in 10 page document.
    Keywords: Ecology ; Limnology ; Pollution ; UK ; England ; North West ; Rivers ; Environmental assessment ; Water management ; Freshwater pollution ; Water quality ; River Irwell ; water@leeds
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    Type: conference_item , FALSE
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    In:  library@mlml.calstate.edu | http://aquaticcommons.org/id/eprint/11193 | 8 | 2013-06-06 23:58:52 | 11193 | Beaudette Foundation for Biological Research
    Publication Date: 2021-06-29
    Keywords: Biology ; Ecology
    Repository Name: AquaDocs
    Type: article
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11276 | 196 | 2015-05-30 00:30:22 | 11276 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-30
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temas de trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota: Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: LÓPEZ, H. L. & J. PONTE GÓMEZ. 2013. Semblanzas Ictiológicas: Leandro Andrés Miranda. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(09): 1-11. ISSN 1515-9329
    Keywords: Biology ; Argentina ; Biogeographical sketchs-Semblanzas ; Leandro Andrés Miranda
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    Devon River Authority
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10879 | 1256 | 2013-03-26 13:40:17 | 10879 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-01
    Description: This is the River Dart Biological Survey from 10th June to 15th July 1968 by the Devon River Authority. This survey was undertaken to investigate the invertebrate bottom fauna of the river and to assess the condition of the river with regard to pollution. It describes the environmental conditions of the River Dart and the biological sampling method used, plus a brief conclusion of the survey. It also contains tables with the different species present and abundance on each sampling stations.
    Description: Environment Agency Archives South West
    Keywords: Biology ; Fisheries ; Limnology ; England ; South West ; River Dart ; Inland waters ; Population structure ; Population dynamics ; Water quality
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11278 | 196 | 2015-05-30 00:22:53 | 11278 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-30
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temasde trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota: Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: LÓPEZ, H. L. & J. PONTE GÓMEZ. 2013. Semblanzas Ictiológicas: Daniel Enrique. Figueroa. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(11): 1-14. ISSN 1515-9329
    Keywords: Biology ; Argentina ; Biogeographical sketchs-Semblanzas ; Daniel Enrique Figueroa
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    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11273 | 196 | 2015-05-30 00:29:40 | 11273 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-30
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temasde trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota: Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: LÓPEZ, H. L. & J. PONTE GÓMEZ. 2013. Semblanzas Ictiológicas: Juan Martín Díaz de Astarloa. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(06): 1-12. ISSN 1515-9329
    Keywords: Biology
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    University of California, Santa Barbara, Biology
    In:  jessie.altstatt@gmail.com | http://aquaticcommons.org/id/eprint/11330 | 29 | 2013-08-26 17:25:52 | 11330
    Publication Date: 2021-07-01
    Description: Precipitous declines in wild populations of the red abalone Haliotis rufescens and the eventual closure of the commercial and southern recreational fishery have led to renewed interest in supplementing wild stocks with hatchery-raised individuals. Most work to date has focused on releasing small juveniles and has had limited success. Although much is known about larval settlement, juvenile survivorship and growth of abalone, there is scanty information on natural processes in the field. The failure of many regulated fisheries worldwide suggests that both the larval and juvenile stages may be important in determining the future population, and that early juvenile mortality is more important than previously believed. This paper presents a series of experiments designed to examine factors and mechanisms that could affect settlement, survivorship, and growth of larvae and early post-settlers in the field.Laboratory trials under different flow regimes showed that red abalone larvae settled preferentially on substrates encrusted with coralline algae, and that settlement was rapid when exposed to crusts compared to other surfaces. Urchin grazing of films appeared to facilitate abalone settlement but only when urchins were removed. Initial field experiments showed that released larvae settled on natural cobble rock, and that settlement was at least one order of magnitude greater when settlement habitats were tented. I then examined post-settlement survivorship at one and two days after settlement, and found that although there was a large amount of variation, on average 10% of released larvae were found as newly-settled recruits after 1 day. Survivorship and growth of recruits were followed over at least one month in both Spring and Fall. Abalone settled at higher densities, survived better and grew faster in the warmer Fall months than in the Spring. The density of month-old abalone recruits was correlated with density of naturally-occurring gastropods in the Spring, but not in the Fall. These results suggest that settlement and survivorship can be extremely variable across space and time, and that oceanographic and local biotic conditions play a role and should be considered when planning larval seeding.
    Description: Masters
    Description: Copyright permission signed by the author is on file with the IAMSLIC archive. PDF contains 116 pages (front matter + 109 pp.).
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: thesis
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    Format: application/pdf
    Format: 109
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    National Rivers Authority | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10909 | 1256 | 2013-03-21 13:05:20 | 10909 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-01
    Description: This is the Cheshire Meres 1995, May – June Surveys Report from the National Rivers Authority, 1995. The report focuses on the surveys of ten Cheshire Meres in November 1994 and then again in May-June 1995 as part of a rolling program examining the water quality of this group of still waters. The ten meres surveyed were: Betley, Budworth, Combermere, Hatchmere, Oak mere, Pick mere, Redes, Rostheme, Tabley, and Tatton. This report discusses the results of the May-June survey before making a comparison between these and the November survey results. The section on results contains information about suspended solids (S.S.) and volatile suspended solids (V.S.S.); Nitrate and Nitrite; Ammonia; ortho-Phosphate; Silicate and Soluble reactive Silica; and total Phosphorus.
    Description: Environment Agency Archives North West
    Description: + appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; Cheshire ; Environmental assessment ; Survey ; Eutrophication ; Inland waters ; Pollution ; Lakes classification
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    Type: monograph
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    Format: application/pdf
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    Environment Agency North West | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10914 | 1256 | 2013-03-22 14:06:01 | 10914 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-02
    Description: This is the Cheshire stillwaters summary results 1999 from the Environment Agency North West. In May 1997, a Stillwaters meeting was held to discuss the way forward in stillwaters monitoring. It decided upon the establishment of a three year rolling programme, in which three stillwaters would be monitored three times a year, every third year. During 1999, stillwaters monitored for the third year of the Stillwaters Monitoring Programme were Tabley Mere, Comber Mere and Norbury Mere. Surveys of Petty Pool and Betley Mere continued for a second and third year respectively after water quality concerns were highlighted in previous end-of-year reports. Oak Mere was also surveyed for the third year running due to its unusual ecology. This year, the variety of parameters monitored was limited to algal, zooplankton and water chemical samples. Fisheries and marginal invertebrate surveys were not completed due to lack of resources.
    Description: Environment Agency Archives North West
    Description: + appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; Cheshire ; Environmental assessment ; Environmental monitoring ; Survey ; Water Quality ; Eutrophication ; Inland waters ; Pollution ; Fish surveys
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 9
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    Environment Agency | UK
    In:  dis@fba.org.uk | http://aquaticcommons.org/id/eprint/10913 | 1256 | 2013-03-22 14:06:43 | 10913 | Environment Agency, UK (Freshwater Biological Association)
    Publication Date: 2021-07-02
    Description: This is the Stillwaters monitoring programme summary results 2000 from the Environment Agency. In May 1997, a Stillwaters meeting was held to discuss the way forward in stillwaters monitoring. It decided upon the establishment of a three year rolling programme, in which three stillwaters would be monitored three times a year, every third year. During 2000, stillwaters monitored for the fourth year of the Stillwaters Monitoring Programme were Hatch Mere, Marbury Big Mere, Comber Mere, Tabley Mere, Tatton Mere and Melchett Mere. Algal, zooplankton and water chemical samples were taken on all meres. Surveys of Tabley Mere and Comber Mere continued on from last year when water quality concerns were highlighted. Continuous monitoring in Oak Mere, including water level data continued in 2000. Fish surveys were carried out in Tatton Mere and Comber Mere. Tabley Mere survey was abandoned due to the awkward bathymetry of the mere. No invertebrate samples were taken in 2000 due to lack of resources.
    Description: Environment Agency Archives North West
    Description: + appendices
    Keywords: Fisheries ; Limnology ; Management ; England ; Cheshire ; Environmental assessment ; Environmental monitoring ; Survey ; Water Quality ; Eutrophication ; Inland waters ; Pollution ; Fish surveys
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 20
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    Stanford University | Pacific Grove, CA
    In:  http://aquaticcommons.org/id/eprint/10920 | 29 | 2013-02-26 14:46:10 | 10920
    Publication Date: 2021-07-02
    Description: Copyright permission signed by the author is on file with the IAMSLIC archive.
    Keywords: Biology ; Ecology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 19
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12401 | 130 | 2014-02-08 01:09:54 | 12401 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: Analysis of scale samples from 87 striped bass from the 1940 year class of the Chesapeake Bay, and 39 samples from the 1938 year class of the Hudson River, indicated that the smaller yearling individuals made a more rapid growth in their second year than the larger ones. Compensation was not complete, since the growth advantage of the larger individuals is maintained to a considerable degree.
    Keywords: Biology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 16
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12399 | 130 | 2014-02-08 01:07:00 | 12399 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: Introduction.Observations: structure of the ovary during the periods of growth and ovulation in the mature crab (stages 1-5).Discussion and conclusions.
    Keywords: Aquaculture ; Biology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 17
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12402 | 130 | 2014-02-08 01:09:02 | 12402 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: Most Copepoda pass through, first, a series of nauplius stages, and then through a series of copepodid stages (or cyclops stages), in which the general form of the adult is assumed. ... In the first place, the differentiation between the larvae of the various copepod species to be found in the plankton, both marine and fresh water, greatly augments the value and accuracy of quantitative and qualitative plankton analyses, because many species spend a large portion of their life span in an immature condition. In the second place, the taxonomy of the Copepoda is admittedly not completely satisfactory ...
    Keywords: Biology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12430 | 130 | 2014-02-08 03:56:16 | 12430 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: Organisms were collected on test panels, six inch lengths of dressed two by four inch pine, suspended in the water in a vertical position as described by Turner (1947). The panels were usually located at some convenient structure such as a dock-piling or sea-wall. Except where otherwise indicated by the data, the samples were collected from each station once a month between May 1950 and May 1953. During the three year period, seven hundred and nineteen panels were submerged in Chesapeake Bay. Approximately 14,000 organisms were encountered on these panels of which 20% or approximately 3,000 organisms could be identified from the dried pallets. Preliminary notes on the extent of fouling were made in the field after which the samples were removed to the laboratory for further study.
    Keywords: Biology ; Ecology ; Fisheries ; fouling
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 31
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12426 | 130 | 2014-02-08 04:04:47 | 12426 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: This study was initiated during the summer of 1940 with the following objectives: (1) To determine at what age sexual maturity begins in striped bass of the Chesapeake Bay. (2) To determine whether the potential of reproduction declines with increasing age in Chesapeake Bay fish. (3) To determine whether striped bass in northern waters have a spawning cycle similar to that found in the Chesapeake Bay fish.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 16
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12578 | 130 | 2014-02-08 04:06:54 | 12578 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-03
    Description: The striped bass, or rock as the species is called in the Chesapeake area, ranks high in value and volume among the commercially important fish taken in Maryland waters and, in addition, is highly prized as a game fish by sportsmen. Interest in the marked fluctuations characteristic of the species stimulated the investigation begun in October, 1941.
    Description: University of Maryland Graduate School
    Description: U.S. Fish and Wildlife Service
    Description: Maryland Department of Research and Education
    Keywords: Biology ; Fisheries
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    Type: monograph
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12580 | 130 | 2014-02-08 01:03:40 | 12580 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-03
    Description: This paper is based on an attempt to assemble the existing knowledge of the silverside, Menidia menidia, and to contribute to what is known about the life history of this species. A vast amount of work is needed on the ecological relationships between the food fish and the forage fish. One of the most important forage fishes on the Atlantic Coast is the silverside. To understand the inter-relationships between the food fish and the forage fish it is necessary first to understand the life histories of both. For this reason it is important that the life history of this species be studied.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12579 | 130 | 2014-02-10 02:22:35 | 12579 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-03
    Description: The determination of the distribution and seasonal fluctuations of ostracodes living in the littoral zone directly in front of the Chesapeake Biological Laboratory has been attempted in the present study. Samples taken in other parts of the Chesapeake Bay and around Solomons harbor, show that other species of ostracodes exist but these forms have not been considered in the two-year study here reported. The seasonal distribution of the species was compared with hydrographical records furnished for the same period by the Chesapeake Biological Laboratory in order to determine the correlation between ecological factors and seasonal fluctuations in numbers and species of Ostracoda.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 61
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12581 | 130 | 2014-02-10 02:24:59 | 12581 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-03
    Description: This bulletin reports, in a non-technical manner, investigations on the Virginia muskrat, prevalent in Maryland, from July, 1949 to June, 1951.
    Description: International Health Division of the Rockefeller Foundation
    Description: Maryland Game and Inland Fish Commission
    Keywords: Biology ; Ecology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 36
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    In:  http://aquaticcommons.org/id/eprint/12583 | 9 | 2014-03-25 18:35:11 | 12583 | Central Caribbean Marine Institute
    Publication Date: 2021-06-30
    Description: In: Lang, J.C.(ed.) (2003) Status of coral reefs in the western Atlantic: results of initial surveys, Atlantic & Gulf Rapid Reef Assessment (AGRRA) Program.
    Keywords: Biology ; Environment
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 204-225
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    In:  http://aquaticcommons.org/id/eprint/12582 | 9 | 2014-03-25 18:25:52 | 12582 | Central Caribbean Marine Institute
    Publication Date: 2021-06-30
    Description: Coral Reefs, Articles Online, 07 November 2013
    Keywords: Biology ; Fisheries
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 1-1
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12824 | 130 | 2014-02-08 04:02:55 | 12824 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-07-06
    Description: Baltimore Harbor is polluted by discharge of sewage and industrial wastes into tributary streams and peripheral waters. The Harbor is used extensively for navigation, industrial water supply, and recreation as well as for waste disposal. The degree of pollution varies from negligible in the principal fairway to severe in the innermost sections. Private industry discharges several hundred tons of acid materials daily and is also the principal source of organic pollution.
    Description: PDF includes 141 pp. (front matter + 132 pp.).
    Keywords: Conservation ; Ecology ; Environment ; Pollution
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 132
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    LGL Ecological Research Associates, Inc. | Bryan, TX
    In:  http://aquaticcommons.org/id/eprint/14136 | 9596 | 2020-08-31 18:05:28 | 14136 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: This report provides a synthesis of the observed effects of the Buccanneer Gas and Oil Field on biological systems and fisheries of the study area. Demersal fishes and macrocrustaceans, the biofouling community, reef and pelagic fishes were used as indicators of impacts. Other biological components (bacteria, plankton and in-faunal benthos) were considered as part of the environment and were addressed only to the extent that they directly impacted or limited the primary indicator groups.
    Keywords: Environment ; Pollution ; artificial reef ; demersal fish ; gas production ; macrocrustaceans ; oil production
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 82
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    Texas A&M University
    In:  http://aquaticcommons.org/id/eprint/14155 | 9596 | 2020-08-31 18:04:49 | 14155 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: The purpose of this study is to provide some insight into the nature of the bottom fauna of the deep water of the northwestern Gulf of Mexico. Deep water, in this case, is considered to be from 100 fathoms to a maximum depth of over 2000 fathoms. The samples considered in this study were collected during three cruises of the R/V Alaminos at depths within the above range. The positions and depths of the sampling stations of these cruises are listed in Table I. The lack of published material on the benthos from these depths in the northwestern Gulf of Mexico is evidenced in the following review.
    Description: Masters
    Keywords: Biology ; benthos ; deep water
    Repository Name: AquaDocs
    Type: thesis
    Format: application/pdf
    Format: application/pdf
    Format: 89
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    Texas Game and Fish Commission Marine Laboratory | Rockport, TX
    In:  http://aquaticcommons.org/id/eprint/14201 | 9596 | 2020-08-31 20:32:13 | 14201 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: Galveston Bay, Matagorda Bay, San Antonio Bay, Aransas Bay and South Bay areas were sampled at a total of nineteen stations to determine the population characteristics and fluctuations of oysters on the Texas coast. Population samples taken at monthly intervals from these stations showed heavy spat setting occurred in June 1962 and continued in moderation through December 1962. Survival of spat and seed class oysters ranged from moderate in Galveston Bay to excellent in the lower coastal bays. No extensive natural moralities were noted in any of the bay areas and the number of market-sized oysters increased in nearly all the bays. Dermocystidium marinum incidence maintained a high level, but no moralities were associated with the fungus. Oyster populations in Aransas Bay have recovered from the 1959 die-off and are once again approaching an overcrowded conditions for lack of harvesting. Artificial reefs, built in Aransas and Matagorda Bays, have been extremely successful and have attained the characteristics of natural oyster reefs.
    Keywords: Biology ; Fisheries ; oysters ; marine molluscs ; population dynamics ; oyster reefs ; artificial reefs ; growth ; mortality
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    Type: book_section
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    Format: application/pdf
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    Texas Game and Fish Commission | Rockport, TX
    In:  http://aquaticcommons.org/id/eprint/14233 | 9596 | 2020-08-23 21:38:45 | 14233 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: Sinclair Refinery is located on the Houston Ship Channel approximately 2.5 miles above the Washburn Tunnel in Pasadena, Texas. Sinclair employs 2000 personnel and processes over 150,000 barrels of crude per day. Five thousand gallons per minute of waste waters from the refinery enter the Houston Ship Channel after being run through old, outdated, oil skimmers. Samples of this discharge were analyzed for the presence of potentially harmful chemical constituents. It is believed that with the completion of the new retention basin and acid pond with pH control a substantial improvement in water quality should be achieved.
    Keywords: Aquaculture ; Pollution ; wastewater ; chemical analysis ; water analysis ; water quality ; oil pollution ; industrial wastes ; oil refineries ; GBIC
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 2
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    Texas Game and Fish Commission | Rockport, TX
    In:  http://aquaticcommons.org/id/eprint/14213 | 9596 | 2020-08-23 22:33:19 | 14213 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: Observations and analysis of the various features of the water of upper Galveston and Trinity Bays (Area M-2) were made using dye, thermometers, chemical tests, and other appropriate methods. Information and data were also collected from numerous publications and other sources. The distribution of marine organisms relative to pollution in the Houston Ship Channel was investigated.
    Keywords: Chemistry ; Ecology ; Pollution ; chemical analysis ; physical properties ; water analysis ; pollution ; marine organisms ; ecological distribution ; GBIC
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
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    Texas Parks and Wildlife Department | Austin, TX
    In:  http://aquaticcommons.org/id/eprint/14254 | 9596 | 2020-08-31 20:12:10 | 14254 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: This study was initiated to determine the source, amount, and area of pesticide contamination within some Texas bays, including Galveston Bay. The commercial oyster (Crassostrea virginica) was used as the indicator organism. Whole oysters were prepared for analysis by electron capture gas liquid chromatography. Analyses were made for the following chlorinated hydrocarbons: Aldrin, BHC, Dieldrin, DDD, DDE, DDT, Endrin, Heptachlor epoxide, Lindane, and Methoxychlor. The estimated crop land within each watershed being sampled was determined. Approximate pounds of each pesticide applied per year were determined to pinpoint areas of high application,
    Keywords: Limnology ; Pollution ; oysters ; Crassostrea virginica ; chlorinated hydrocarbons ; pesticides ; watersheds ; pollution ; GBIC
    Repository Name: AquaDocs
    Type: book_section
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    In:  dana.hanselman@noaa.gov | http://aquaticcommons.org/id/eprint/14482 | 403 | 2014-02-27 17:12:09 | 14482 | United States National Marine Fisheries Service
    Publication Date: 2021-06-25
    Description: Biomass estimates of several species of Alaskan rockfishesexhibit large interannual variations. Because rockfishes are long lived and relatively slow growing, large, short-term shifts in population abundance are not likely. We attribute the variations in biomass estimates to the high variability in the spatial distribution of rockfishes that is not well accounted for by the survey design currently used. We evaluated the performance of an experimental survey design, the Trawl and Acoustic Presence/Absence Survey (TAPAS), to reduce the variability in estimated biomass for Pacific ocean perch (Sebastes alutus). Analysis of archived acoustic backscatter data produced an acoustic threshold for delineating potential areas of high (“patch”) and low (“background”) catch per unit of effort (CPUE) in real time. In 2009, we conducted a 12-day TAPAS near Yakutat, Alaska. We completed 59 trawls at 19 patch stations and 40 background stations. The design performed well logistically, and Pacific ocean perch (POP) accounted for 55% of the 31 metric tons (t) of the catch from this survey. The resulting estimates of rockfish biomass were slightly less precise than estimates from simple random sampling. This difference in precision was due to the weak relationship of CPUE to mean volume backscattering and the relatively low variability of POP CPUE encountered. When the data were re-analyzed with a higher acoustic threshold than the one used in the field study, performance was slightly better with this revised design than with the original field design. The TAPAS design could be made more effective by establishing a stronger link between acoustic backscatter and CPUE and by deriving an acoustic threshold that allows better identification of backscatter as that from the target species.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 379-396
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    Publication Date: 2021-06-26
    Description: Seasonal trawling was conducted randomly in coastal (depths of 4.6–17 m) waters from St. Augustine, Florida, (29.9°N) to Winyah Bay, South Carolina (33.1°N), during 2000–03, 2008–09, and 2011 to assess annual trends in the relative abundance of sea turtles. A total of 1262 loggerhead sea turtles (Caretta caretta) were captured in 23% (951) of 4207 sampling events. Capture rates (overall and among prevalent 5-cm size classes) were analyzed through the use of a generalized linear model with log link function for the 4097 events that had complete observations for all 25 model parameters. Final models explained 6.6% (70.1–75.0 cm minimum straight-line carapace length [SCLmin]) to 14.9% (75.1–80.0 cm SCLmin) of deviance in the data set. Sampling year, geographic subregion, and distance from shore were retained as significant terms in all final models, and these terms collectively accounted for 6.2% of overallmodel deviance (range: 4.5–11.7% of variance among 5-cm size classes). We retained 18 parameters only in a subset of final models: 4 as exclusively significant terms, 5 as a mixture of significant or nonsignificant terms, and 9 as exclusively nonsignificant terms. Four parameters also were dropped completely from all final models. The generalized linear model proved appropriate for monitoring trends for this data set that was laden with zero values for catches and was compiled for a globally protected species. Because we could not account for much model deviance, metrics other than those examined in our study may better explain catch variability and, once elucidated, their inclusion in the generalized linear model should improve model fits.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
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    Format: application/pdf
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    In:  tom.laidig@noaa.gov | http://aquaticcommons.org/id/eprint/14494 | 403 | 2014-02-13 04:22:14 | 14494 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: We examined the reactions of fishes to a manned submersible and a remotely operated vehicle (ROV) during surveys conducted in habitats of rock and mud at depths of 30–408 m off central California in 2007. We observed 26 taxa for 10,550 fishes observed from the submersible and for 16,158 fishes observed from the ROV. A reaction was defined as a distinct movement of a fish that, for a benthic or hovering individual, was greater than one body length away from its initial position or, for a swimming individual, was a change of course or speed. Of the observed fishes, 57% reacted to the ROV and 11% reacted to the submersible. Aggregating species and those species initially observed off the seafloor reacted most often to both vehicles. Fishes reacted more often to each vehicle when they were 〉1 m above the seafloor (22% of all fishes 〉1 m above the seafloor reacted to the submersible and 73% to the ROV) than when they were in contact with the seafloor (2% of all reactions to the submersible and 18% to the ROV). Fishes reacted by swimming away from both vehicles rather than toward them. Consideration of these reactions can inform survey designs and selection of survey tools and can, thereby, increase the reliability of fish assemblage metrics (e.g., abundance, density, and biomass) and assessments of fish and habitat associations.
    Keywords: Biology ; Ecology ; Fisheries
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    Publication Date: 2021-06-26
    Description: Western Atlantic synodontid species were studied as part of an ongoing effort to reanalyze Caribbean shorefish diversity. A neighbor-joining tree constructed from cytochrome c oxidase I (COI) data revealed 2 highly divergent genetic lineages within both Synodus intermedius (Agassiz, 1829) (Sand Diver) and S. foetens (Linnaeus, 1766) (Inshore Lizardfish). A new species, Synodus macrostigmus, is described for one of the S. intermedius lineages. Synodus macrostigmus and S. intermedius differ in number of lateral-line scales, caudal pigmentation, size of the scapular blotch, and shape of the anterior-nostril flap. Synodus macrostigmus and S. intermedius have overlapping geographic and depth distributions, but S. macrostigmus generally inhabits deeper water (〉28 m) than does S. intermedius and is known only from coastal waters of the southeastern United States and the Gulf of Mexico, in contrast to those areas and the Caribbean for S. intermedius. Synodus bondi Fowler, 1939, is resurrected from the synonymy of S. foetens for one of the S. foetens genetic lineages. The 2 species differ in length and shape of the snout, number of anal-fin rays, and shape of theanterior-nostril flap. Synodus bondi and S. foetens co-occur in the central Caribbean, but S. bondi otherwise has a more southerly distribution than does S. foetens. Redescriptions are provided for S. intermedius, S. foetens, and S. bondi. Neotypes are designated for S. intermedius and S. foetens. A revised key to Synodus species in the western Atlantic is presented.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  fulford.richard@epa.gov | http://aquaticcommons.org/id/eprint/14498 | 403 | 2014-02-13 04:19:23 | 14498 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: Stable isotope (SI) values of carbon (δ13C) and nitrogen (δ15N) are useful for determining the trophic connectivity between species within an ecosystem, but interpretation of these data involves important assumptions about sources of intrapopulation variability. We compared intrapopulation variability in δ13C and δ15N for an estuarine omnivore, Spotted Seatrout (Cynoscion nebulosus), to test assumptions and assess the utility of SI analysis for delineation of the connectivity of this species with other species in estuarine food webs. Both δ13C and δ15N values showed patterns of enrichment in fish caught from coastal to offshore sites and as a function of fish size. Results for δ13C were consistent in liver and muscle tissue, but liverδ15N showed a negative bias when compared with muscle that increased with absolute δ15N value. Natural variability in both isotopes was 5–10 times higher than that observed in laboratory populations, indicating that environmentally driven intrapopulation variability is detectable particularly after individual bias is removed through sample pooling. These results corroborate the utility of SI analysis for examination of the position of Spotted Seatrout in an estuarine food web. On the basis of these results, we conclude that interpretation of SI data in fishes should account for measurable and ecologically relevant intrapopulation variability for each species and system on a case by case basis.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  essing@uw.edu | http://aquaticcommons.org/id/eprint/14504 | 403 | 2014-02-13 18:26:57 | 14504 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: Puget Sound is one of the largest and most ecologically significant estuaries in the United States, but the status and trends of many of its biological components are not well known. We analyzed a 21-year time series of data from standardized bottom trawl sampling at a single study area to provide the first assessment of population trends of Puget Sound groundfishes after the closure of bottom trawl fisheries. The expected increase in abundance was observed for only 3 of 14 species after this closure, and catch rates of most (10) of the abundant species declined through time. Many of these changes were stepwise (abrupt) rather than gradual, and many stocks exhibited changes in catch rate during the 3-year period from 1997 through 2000. Nodetectable change was recorded for either temperature or surface salinity over the entire sampling period. The abrupt density reductions that were observed likely do not reflect changes in demographic rates but may instead represent distributional shifts within Puget Sound.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  kcapossela@dnr.state.md.us | http://aquaticcommons.org/id/eprint/14503 | 403 | 2014-02-13 18:09:48 | 14503 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: We monitored the movements of 45 adult Summer Flounder (Paralichthys dentatus) between June 2007 and July 2008 through the use of passive acoustic telemetry to elucidate migratory and within-estuary behaviors in a lagoon system of the southern mid-Atlantic Bight. Between 8 June and 10 October 2007, fish resided primarily in the deeper (〉3 m) regions of the system and exhibited low levels of large-scale (100s of meters) activity. Mean residence time within this estuarine lagoon system was conservatively estimated to be 130 days (range: 18–223 days), which is 1.5 times longer than the residence time previously reported for Summer Flounder in a similar estuarine habitat ~250 km to the north. The majority of fish remained within the lagoon system until mid-October, although some fish dispersed earlier and some of them appeared to disperse temporarily (i.e., exited the system for at least 14 consecutive days before returning). Larger fish were more likely to disperse before mid-October than smaller fish and may have moved to other estuaries or the inner continental shelf. Fish that dispersed after mid-October were more likely to return to the lagoon system the following spring than were fish that dispersed before mid-October. In 2008, fish returned to the system between 7 February and 7 April. Dispersals and returns most closely followed seasonal changes in mean water temperature, but photoperiod and other factors also may have played a role in large-scale movements of Summer Flounder.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  nate.bacheler@noaa.gov | http://aquaticcommons.org/id/eprint/14505 | 403 | 2014-02-13 18:36:35 | 14505 | United States National Marine Fisheries Service
    Publication Date: 2021-06-26
    Description: Catch rates from fishery-independent surveys often are assumed to vary in proportion to the actual abundance of a population, but this approach assumes that the catchability coefficient (q) is constant. When fish accumulate in a gear, the rate at which the gear catches fish can decline, and, as a result, catch asymptotes and q declines with longer fishing times. We used data from long-term trap surveys (1990–2011) in the southeastern U.S. Atlantic to determine whether traps saturated for 8 reef fish species because of the amount of time traps soaked or the level of fish accumulation (the total number of individuals of all fish species caught in a trap). We used a delta-generalized-additive model to relate the catch of each species to a variety of predictor variables to determine how catch was influenced by soak time and fish accumulation after accounting for variability in catch due to the other predictor variables in the model. We found evidence of trap saturation for all 8 reef fish species examined. Traps became saturated for most species across the range of soak times examined, but trap saturation occurred for 3 fishspecies because of fish accumulation levels in the trap. Our results indicate that, to infer relative abundance levels from catch data, future studies should standardize catch or catch rates with nonlinear regression models that incorporate soak time, fish accumulation, and any other predictor variable that may ultimately influence catch. Determination of the exact mechanisms that cause trap saturation is a critical need for accurate stock assessment, and our results indicate that these mechanisms may vary considerably among species.
    Keywords: Biology ; Ecology ; Fisheries
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    Facultad de Ciencias Naturales y Museo (FCNyM), UNLP | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/14518 | 196 | 2015-05-30 00:20:56 | 14518 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-27
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temas de trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota -Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: López, H. L. & J. Ponte Gómez. 2013. Semblanzas Ictiológicas: Andrea Cecilia Hued. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(15): 1-12. ISSN 1515 9329.
    Keywords: Biology ; Argentina ; Ichthyology - Ictiología ; Biographical sketchs - Semblanzas ; Andrea Cecilia Hued
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    Facultad de Ciencias Naturales y Museo (FCNyM), UNLP | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/14517 | 196 | 2015-05-30 00:38:14 | 14517 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-27
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temas de trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota -Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: López, H. L. & J. Ponte Gómez. 2013. Semblanzas Ictiológicas: Ricardo Jorge Casaux. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(13): 1-11. ISSN 1515 9329.
    Keywords: Biology ; Argentina ; Ichthyology - Ictiología ; Biographical sketchs - Semblanzas ; Argentina ; Ichthyology - Ictiología ; Biographical sketchs - Semblanzas ; Ricardo Jorge Casaux
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    Facultad de Ciencias Naturales y Museo (FCNyM), UNLP | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/14522 | 196 | 2015-05-30 00:24:41 | 14522 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-27
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temas de trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota -Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: López, H. L. & J. Ponte Gómez. 2013. Semblanzas Ictiológicas: Diego Oscar Nadalin. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(19): 1-15. ISSN 1515 9329.
    Keywords: Biology ; Argentina ; Ichthyology - Ictiología ; Biographical sketchs - Semblanzas ; Diego Oscar Nadalin
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    Facultad de Ciencias Naturales y Museo (FCNyM), UNLP | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/14528 | 196 | 2015-05-30 00:20:21 | 14528 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Publication Date: 2021-06-27
    Description: A través de esta serie intentaremos conocer diferentes facetas personales de los integrantes de nuestra “comunidad”.El cuestionario, además de su principal objetivo, con sus respuestas quizás nos ayude a encontrar entre nosotros puntos en común que vayan más allá de nuestros temas de trabajo y sea un aporte a futuros estudios históricos.Esperamos que esta iniciativa pueda ser otro nexo entre los ictiólogos de la región, ya que consideramos que el resultado general trascendería nuestras fronteras.
    Description: ProBiota -Programa para el estudio y uso sustentable de la biota austral
    Description: Debe citarse: López, H. L. & J. Ponte Gómez. 2013. Semblanzas Ictiológicas: Alicia Haydée Escalante. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 21(25): 1-10. ISSN 1515 9329.
    Keywords: Biology ; Argentina ; Ichthyology - Ictiología ; Biographical sketchs - Semblanzas ; Alicia Haydée Escalante
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    In:  mdrymon@disl.org | http://aquaticcommons.org/id/eprint/14532 | 403 | 2014-02-14 20:00:41 | 14532 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Identification of the spatial scale at which marine communities are organized is critical to proper management, yet this is particularly difficult to determine for highly migratory species like sharks. We used shark catch data collected during 2006–09 from fishery-independent bottom-longline surveys, as well as biotic and abiotic explanatory data to identify the factors that affect the distribution ofcoastal sharks at 2 spatial scales in the northern Gulf of Mexico. Centered principal component analyses (PCAs) were used to visualize the patterns that characterize shark distributions at small (Alabama and Mississippi coast) and large (northern Gulf of Mexico) spatial scales. Environmental data on temperature, salinity, dissolved oxygen (DO), depth, fish and crustacean biomass, and chlorophyll-a (chl-a) concentration were analyzed with normed PCAs at both spatial scales. The relationships between values of shark catch per unit of effort (CPUE) and environmental factors were then analyzed at each scale with co-inertia analysis (COIA). Results from COIA indicated that the degree of agreement between the structure of the environmental and shark data sets was relatively higher at the small spatial scale than at the large one. CPUE of Blacktip Shark (Carcharhinus limbatus) was related positively with crustacean biomass at both spatial scales. Similarly, CPUE of Atlantic Sharpnose Shark (Rhizoprionodonterraenovae) was related positively with chl-a concentrationand negatively with DO at both spatial scales. Conversely, distribution of Blacknose Shark (C. acronotus) displayed a contrasting relationship with depth at the 2 scales considered. Our results indicate that the factors influencing the distribution of sharks in the northern Gulf of Mexico are species specific but generally transcend the spatial boundaries used in our analyses.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  dardent@dnr.sc.gov | http://aquaticcommons.org/id/eprint/14536 | 403 | 2014-02-14 22:10:01 | 14536 | United States National Marine Fisheries Service
    Publication Date: 2021-06-27
    Description: Cobia (Rachycentron canadum) is a pelagic, migratory species with a transoceanic distribution in tropical and subtropical waters. Recreational fishing pressure on Cobia in the United States has increased substantially during the last decade, especially in areas of its annual inshore aggregations, making this species potentially susceptible to overfishing. Although Cobia along the Atlantic and Gulf coasts of the southeastern United States are currently managed as a single fishery, the genetic composition of Cobias in these areas is unclear. On the basis of a robust microsatellite data set from collections along the U.S. Atlantic coast (2008–09), offshore groups were genetically homogenous. However, the 2 sampled inshore aggregations (South Carolina and Virginia) were genetically distinct from each other, as well as from the offshore group. The recapture of stocked fish within their release estuary 2 years after release indicates that some degree of estuarine fidelity occurs within these inshore aggregations and supports the detection of their unique genetic structure at the population level. These results complement the observed high site fidelity of Cobias in South Carolina and support a recent study that confirms that Cobia spawn in the inshore aggregations. Our increased understanding of Cobia life history will be beneficial for determining the appropriate scale of fishery management for Cobia.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    In:  arthur@virginia.edu | http://aquaticcommons.org/id/eprint/14908 | 403 | 2014-03-11 22:34:30 | 14908 | United States National Ocean Service
    Publication Date: 2021-06-28
    Description: Leaf growth of the seagrass Syringodium filiforme (Kütz., 1860) was determined using a new technique based on the growth of emergent leaves (EL method) and compared to the more labor intensive repeated measurements (RM) and demographic allometric age reconstruction techniques (DA). All three techniques were used to compare leaf growth dynamics of plants with different morphologies at two sites, a shallow water (0.5 m) banktop and an adjacent deeper water (1.5 m) environment in outer Florida Bay, Florida. Leaf formation rates (Leaf Plastochrone Interval or PI) determined using the EL and RM methods were nearly identical, with means of 20 and 21 d leaf–1 at both sites, significantly faster than the 30 d leaf–1 calculated using the DA method. The EL method produced the highest estimate of leaf growth, 1.8 and 1.9 cm d–1 at the 0.5 m and 1.5 m sites, respectively, followed by the RM method (1.3 and 1.3 cm d–1) and the DA method (1.0 and 1.1 cm d–1). None of the methods detected differences in leaf PI, leaf growth or leaf fragmentation rates between sites. However, leaves at the 1.5 m site typically retained intact leaf tips longer than those at the 0.5 m site, and total leaf lifespan was longer at the 1.5 m site. Based on these results and the amount of field and laboratory work required by each of the methods, the new EL method is the preferred technique for monitoring leaf growth in S. filiforme.
    Keywords: Biology ; Ecology ; Management
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    Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health of the Joint Subcommittee on Ocean Science and Technology | Washington, D.C.
    In:  http://aquaticcommons.org/id/eprint/14922 | 403 | 2014-03-13 23:10:18 | 14922 | United States National Ocean Service
    Publication Date: 2021-06-28
    Description: This report, "Harmful Algal Bloom Management and Response: Assessment and Plan" reviews and evaluates Harmful Algal Bloom (HAB) management and response efforts, identifies current prevention, control, and mitigation programs for HABs, and presents an innovative research, event response, and infrastructure development plan for advancing the response to HABs. In December 2004, Congress enacted and the President signed into law the Harmful Algal Bloom and Hypoxia Amendments Act of 2004, (HABHRCA 2004). The reauthorization of HABHRCA acknowledged that HABs are one of the most scientifically complex and economically damaging coastal issues challenging our ability to safeguard the health of our Nation’s coastal ecosystems. The Administration further recognized the importance of HABs as a high priority national issue by specifically calling for the implementation of HABHRCA in the President’s U.S. Ocean Action Plan. HABHRCA 2004 requires four reports to assess and recommend research programs on HABs in U.S. waters. This document comprises two linked reports specifically aimed at improving HAB management and response: the Prediction and Response Report and the follow-up plan, the National Scientific Research, Development, Demonstration, and Technology Transfer (RDDTT) Plan on Reducing Impacts from Harmful Algal Blooms. This document was prepared by the Interagency Working Group on Harmful Algal Blooms, Hypoxia, and Human Health, which was chartered through the Joint Subcommittee on Ocean Science and Technology of the National Science and Technology Council and the Interagency Committee on Ocean Science and Resource Management Integration. This report complements and expands upon HAB-related priorities identified in Charting the Course for Ocean Science in the United States for the Next Decade: An Ocean Research Priorities Plan and Implementation Strategy, recently released by the Joint Subcommittee on Ocean Science and Technology. It draws from the contributions of numerous experts and stakeholders from federal, state, and local governments, academia, industry, and non-governmental organizations through direct contributions, previous reports and planning efforts, a public comment period, and a workshop convened to develop strategies for a HAB management and response plan. Given the importance of the Nation’s coastal ocean, estuaries, and inland waters to our quality of life, our culture, and the economy, it is imperative that we move forward to better understand and mitigate the impacts of HABs which threaten all of our coasts and inland waters. This report is an effort to assess the extent of federal, state and local efforts to predict and respond to HAB events and to identify opportunities for charting a way forward.
    Keywords: Fisheries ; Management ; Pollution
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    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14940 | 403 | 2014-03-17 18:30:31 | 14940 | United States National Ocean Service
    Publication Date: 2021-06-29
    Description: This document contains analytical methods that detail the procedures for determining major and trace element concentrations in bivalve tissue and sediment samples collected as part of the National Status and Trends Program (NS&T) for the years 2000-2006. Previously published NOAA Technical Memoranda NOS ORCA 71 and 130 (Lauenstein and Cantillo, 1993; Lauenstein and Cantillo, 1998) detail trace element analyses for the years 1984-1992 and 1993-1996, respectively, and include ancillary, histopathology, and contaminant (organic and trace element) analytical methods.The methods presented in this document for trace element analysis were utilized by the NS&T Mussel Watch and Bioeffects Projects. The Mussel Watch Project has been monitoring contaminants in bivalves and sediment for over 20 years, and is the longest active contaminant monitoring program operating in U.S. costal waters. Approximately 280 Mussel Watch sites are monitored on biennial and decadal timescales using bivalve tissue and sediment, respectively. The Bioeffects Project applies the sediment quality approach, which uses sediment contamination measurements, toxicity tests and benthic macroinfauna quantification to characterize pollution in selected estuaries and coastal embayments. Contaminant assessment is a core function of both projects.Although only one contract laboratory was used by the NS&T Program during the specified time period, several analytical methods and instruments were employed. The specific analytical method, including instrumentation and detection limit, is noted for each measurement taken and can be found at http://NSandT.noaa.gov. The major and trace elements measured by the NS&T Program include: Al, Si, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Sn, Sb, Ag, Cd, Hg, Tl and Pb.
    Keywords: Ecology ; Fisheries ; Pollution
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    In:  http://aquaticcommons.org/id/eprint/15027 | 403 | 2014-06-01 19:06:20 | 15027 | United States National Marine Fisheries Service
    Publication Date: 2021-07-01
    Description: Fisheries models have traditionally focused on patterns of growth, fecundity, and survival of fish. However, reproductive rates are the outcome of a variety of interconnected factors such as life-history strategies, mating patterns, population sex ratio, social interactions, and individual fecundity and fertility. Behaviorally appropriate models are necessary to understand stock dynamics and predict the success of management strategies. Protogynous sex-changing fish present a challenge for management because size-selective fisheries can drastically reduce reproductive rates. We present a general framework using an individual-based simulation model to determine the effect of life-history pattern, sperm production, mating system, and management strategy on stock dynamics. We apply this general approach to the specific question of how size-selective fisheries that remove mainly males will impact the stock dynamics of a protogynous population with fixed sex change compared to an otherwise identical dioecious population. In this dioecious population, we kept all aspects of the stock constant except for the pattern of sex determination (i.e. whether the species changes sex or is dioecious). Protogynous stocks with fixed sex change are predicted to be very sensitive to the size-selective fishing pattern. If all male size classes are fished, protogynous populations are predicted to crash even at relatively low fishing mortality. When some male size classes escape fishing, we predict that the mean population size of sex-changing stocks will decrease proportionally less than the mean population size of dioecious species experiencing the same fishing mortality. For protogynous species, spawning-per-recruit measures that ignore fertilization rates are not good indicators of the impact of fishing on the population. Decreased mating aggregation size is predicted to lead to an increased effect of sperm limitation at constant fishing mortality and effort. Marine protected areas have the potential to mitigate some effects of fishing on sperm limitation in sex-changing populations.
    Keywords: Biology ; Ecology ; Fisheries
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    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Dave.Whitall@noaa.gov | http://aquaticcommons.org/id/eprint/14936 | 403 | 2014-03-17 18:52:15 | 14936 | United States National Ocean Service
    Publication Date: 2021-06-29
    Description: Primary productivity in many coastal systems is nitrogen (N) limited; although, phytoplankton productivity may be limited by phosphorus (P) seasonally or in portions of an estuary. Increases in loading of limiting nutrients to coastal ecosystems may lead to eutrophication (Nixon 1996). Anthropogenically enhanced eutrophication includes symptoms such as loss of seagrass beds, changes in algal community composition, increased algal (phytoplankton) blooms (Richardson et al. 2001), hypoxic or anoxic events, and fish kills (Bricker et al. 2003).
    Keywords: Ecology ; Fisheries ; Pollution
    Repository Name: AquaDocs
    Type: monograph
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    NOAA/National Ocean Service | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14611 | 403 | 2014-02-20 21:40:04 | 14611 | United States National Ocean Service
    Publication Date: 2021-06-29
    Description: The spatial and temporal occurrence of Atlantic bottlenose dolphins (Tursiops truncatus) in the coastal and estuarine waters near Charleston, SC were evaluated. Sighting and photographic data from photo-identification (ID), remote biopsy, capture-release and radio-tracking studies, conducted from 1994 through 2003, were analyzed in order to further delineate residence patterns of Charleston area bottlenose dolphins. Data from 250 photo-ID, 106 remote biopsy, 15 capture-release and 83 radio-tracking surveys were collected in the Stono River Estuary (n = 247), Charleston Harbor (n = 86), North Edisto River (n = 54), Intracoastal Waterway (n = 26) and the coastal waters north and south of Charleston Harbor (n = 41). Coverage for all survey types was spatially and temporally variable, and in the case of biopsy, capture-release and radio-tracking surveys, data analyzed in this report were collected incidental to other research. Eight-hundred and thirty-nine individuals were photographically identified during the study period. One-hundred and fifteen (13.7%) of the 839 photographically identified individuals were sighted between 11-40 times, evidence of consistent occurrence in the Charleston area (i.e., site fidelity). Adjusted sighting proportions (ASP), which reflect an individual’s sighting frequency in a subarea relative to other subareas after adjusting for survey effort, were analyzed in order to evaluate dolphin spatial occurrence. Forty-three percent (n = 139) of dolphins that qualified for ASP analyses exhibited a strong subarea affiliationwhile the remaining 57% (n = 187) showed no strong subarea preference. Group size data were derived from field estimates of 2,342 dolphin groups encountered in the five Charleston subareas. Group size appeared positively correlated with degree of “openness” of the body of water where dolphins were encountered; and for sightings along the coast, group size was larger during summer months. This study provides valuable information on the complex nature of bottlenose dolphin spatial and temporal occurrence near Charleston, SC. In addition, it helps us to better understand the stock structure of dolphins along the Atlantic seaboard.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14614 | 403 | 2014-02-20 22:12:24 | 14614 | United States National Ocean Service
    Publication Date: 2021-06-29
    Description: The assessment of emerging risks in the aquatic environment is a major concern and focus of environmental science (Daughton and Ternes, 1999). One significant class of chemicals that has received relatively little attention until recently are the human use pharmaceuticals. In 2004, an estimated 2.6 billion prescriptions were written for the top 300 pharmaceuticals in the U.S. (RxList, 2005). Mellon et al. (2001) estimated that 1.4 million kg of antimicrobials are used in human medicine every year. The use of pharmaceuticals is also estimated to be on par with agrochemicals (Daughton and Ternes, 1999). Unlike agrochemicals (e.g., pesticides) which tend to be delivered to the environment in seasonal pulses, pharmaceuticals are continuously released through the use/excretion and disposal of these chemicals, which may produce the same exposure potential as truly persistent pollutants. Human use pharmaceuticals can enter the aquatic environment through a number of pathways, although the main one is thought to be via ingestion and subsequent excretion byhumans (Thomas and Hilton, 2004). Unused pharmaceuticals are typically flushed down the drain or wind up in landfills (Jones et al. 2001).
    Keywords: Ecology ; Fisheries ; Management ; Pollution
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    Type: monograph
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    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14951 | 403 | 2014-03-14 22:35:59 | 14951 | United States National Ocean Service
    Publication Date: 2021-06-29
    Description: A meeting was convened on February 22-24, 2005 in Charleston, South Carolina to bring together researchers collaborating on the Bottlenose Dolphin Health and Risk Assessment (HERA) Project to review and discuss preliminary health-related findings from captured dolphins during 2003 and 2004 in the Indian River Lagoon (IRL), FL and Charleston (CHS), SC. Over 30 researchers with diverse research expertise representing government, academic and marine institutions participated in the 2-1/2 day meeting.The Bottlenose Dolphin HERA Project is a comprehensive, integrated, multi-disciplinary research program designed to assess environmental and anthropogenic stressors, as well as the health and long-term viability of Atlantic bottlenose dolphins (Tursiops truncatus). Standardized and comprehensive protocols are being used to evaluate dolphin health in the coastal ecosystems in the IRL and CHS. The Bottlenose Dolphin Health and Risk Assessment (HERA) Project was initiated in 2003 by Dr. Patricia Fair at the National Oceanic and Atmospheric Administration/National Ocean Service/Center for Coastal Environmental Health and Biomolecular Research and Dr. Gregory Bossart at the Harbor Branch Oceanographic Institution under NMFS Scientific Research Permit No. 998-1678-00 issued to Dr. Bossart. Towards this end, this study focuses on developing tools and techniques to better identify health threats to these dolphins, and to develop links to possible environmental stressors. Thus, the primary objective of the Dolphin HERAProject is to measure the overall health and as well as the potential health hazards for dolphin populations in the two sites by performing screening-level risk assessments using standardized methods. The screening-level assessment involves capture, sampling and release activities during which physical examinations are performed on dolphins and a suite of nonlethal morphologic and clinicopathologic parameters, to be used to develop indices of dolphin health, are collected. Thus far, standardized health assessments have been performed on 155 dolphins during capture-release studies conducted in Years 2003 and 2004 at the two sites. A major collaboration has been established involving numerous individuals and institutions, which provide the project with a broad assessment capability toward accomplishing the goals and objectives of this project.
    Keywords: Fisheries ; Health ; Management ; Policies ; Pollution
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    Type: monograph
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    In:  http://aquaticcommons.org/id/eprint/15564 | 8 | 2014-11-06 00:57:26 | 15564
    Publication Date: 2021-07-08
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):Arima analysis was used to compute cross-correlations between principal component axes that described environmental variables, chlorophyll concentration and zooplankton density for the Sacramento and San Joaquin rivers and Suisun Bay. ... Cross-correlations among the time series may provide information about links between environmental and biological variables within the estuary and the possible influence of climate.
    Keywords: Biology ; Environment ; Limnology ; Oceanography ; PACLIM
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    In:  http://aquaticcommons.org/id/eprint/15122 | 403 | 2014-05-28 03:59:40 | 15122 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Cowcod (Sebastes levis) is a large (100-cm-FL), long-lived (maximum observed age 55 yr) demersal rockfish taken in multispecies commercial and recreational fisheries offsouthern and central California. It lives at 20–500 m depth: adults (〉44 cm TL) inhabit rocky areas at 90–300 m and juveniles inhabit fine sand and clay at 40–100 m. Both sexes have similar growth and maturity. Both sexes recruit to the fishery before reaching full maturity. Based on age and growth data, the natural mortality rate is about M =0.055/yr, but the estimate is uncertain. Biomass, recruitment, and mortality during 1951–98 were estimated in a delay-difference model with catch data and abundance indices. The same model gave less precise estimates for 1916–50 based on catch data and assumptions about virgin biomass and recruitment such as used in stock reduction analysis. Abundance indices, based on rare event data, included a habitat-area–weighted index of recreationalcatch per unit of fishing effort (CPUE index values were 0.003–0.07 fish per angler hour), a standardizedindex of proportion of positive tows in CalCOFI ichthyoplankton survey data (binomial errors, 0–13% positivetows/yr), and proportion of positive tows for juveniles in bottom trawl surveys (binomial errors, 0–30% positive tows/yr). Cowcod are overfished in the southern California Bight; biomass during the 1998 season was about 7% of the virgin level and recent catches have been near 20 metric tons (t)/yr. Projections based on recent recruitment levels indicate that biomass will decline at catch levels 〉 5 t/yr. Trend data indicate that recruitment will be poor inthe near future. Recreational fishing effort in deep water has increased and has become more effective for catchingcowcod. Areas with relatively high catch rates for cowcod are fewer and are farther offshore. Cowcod die after captureand cannot be released alive. Two areas recently closed to bottom fishing will help rebuild the cowcod stock.
    Keywords: Biology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15139 | 403 | 2014-05-23 00:04:39 | 15139 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Horseshoe crabs (Limulus polyphemus) are caught by commercial fishermen for use as bait in eel and whelk fisheries (Berkson and Shuster, 1999)—fisheries with an annual economic value of $13 to $17 million (Manion et al.1). Horse-shoe crabs are ecologically important, as well (Walls et al., 2002). Migratory shorebirds rely on horseshoe crab eggs for food as they journey from South American wintering grounds to Arctic breeding grounds (Clark, 1996). Horse-shoe crabs are also essential for public health (Berkson and Shuster, 1999). Biomedical companies bleed horse-shoe crabs to extract a chemical used to detect the presence of endotoxins pathogenic to humans in injectable and implantable medical devices (Novitsky, 1984; Mikkelsen, 1988). Bled horseshoe crabs are returned to the wild, subject to the possibility of postbleeding mortality. Recent concerns of overharvesting have led to conflicts among commercial fishermen, environmentalists acting on behalf of the shorebirds, and biomedical companies (Berkson and Shuster, 1999; Walls et al., 2002).
    Keywords: Biology ; Chemistry ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15140 | 403 | 2014-05-29 06:58:43 | 15140 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: An analysis was made of sexual pattern, spawning season, sizes at sexual maturation, and sex change in black grouper (Mycteroperca bonaci) from the southern Gulf of Mexico.Samples were taken between 1996 and 2000, from industrial and small-craft commercial fi sheries, in offshore andinshore waters of the continental shelf of the Yucatan Peninsula (Campeche Bank), including the shallow waters ofNational Marine Park Alacranes Reef. For all collected specimens (n=1229), sex and maturation condition weredetermined by histological analysis of the gonads. The offshore sample consisted of 75.1% females, 24.3% males,and 0.6% transitional-stage fish. All individuals collected from inshore waters were females. Gonadal structure and population structure characteristics for Campeche Bank black grouper were consistent with the characteristicsof monandric protogynous hermaphrodism for a serranid fish. Sexually active males and females were observed year-round,although ripening females, with stage-III, -IV, and -V vitellogenic oocytes in the ovaries, dominated in samplestaken between December and March. In addition, peak occurrence of ripe-running females with hyaline oocytesor postovulatory follicles (or both) in the ovaries was recorded in January and February. A few precocious femalesbegan spawning in October and November, and others were still in spawning condition in May and June. Fifty percentmaturity of females was attained at 72.1 cm fork length (FL). Median size at sexual inversion was 103.3 cm FL, and 50% of the females measuring 111.4 cm FL had transformed into males. The southern Gulf of Mexico grouper fisherywas considered deteriorated and lacked a well-defined management strategy. Results of the present study providehelpful information on black grouper reproduction in this area and could help Mexican authorities choose appropriatemanagement strategies for this fishery, such as minimum size limit, closed fishing season, and protection of spawning aggregations.
    Keywords: Biology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15149 | 403 | 2014-05-29 07:05:38 | 15149 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Tope shark (Galeorhinus galeus) and thornback ray (Rajaclavata) are the two most captured elasmobranch species by the Azorean bottom longline fishery. In order to better understand the trophic dynamics of these species in the Azores, the diets of thornback ray and tope shark caught in this area during 1996 and 1997 were analyzed to describe feeding patterns and to investigate the effect of sex, size, and depth and area of capture on diet. Thornback rays fed mainly upon fishes and reptants, but also upon polychaetes, mysids, natant crustaceans, isopods, and cephalopods. In the Azores, this species preyed moreheavily upon fish compared with the predation patterns described in other areas. Differences in the diet may bedue to differences in the environments (e.g. in the Azores, seamounts and oceanic islands are the major topographicfeatures, whereas in all other studies, continental shelves have been the major topographic feature). No differenceswere observed in the major prey consumed between the sexes or between size classes (49−60, 61−70, 71−80, and 81−93 cm TL). Our study indicates that rays inhabiting different depths and areas (coastal or offshore banks) prey upon different resources. This appears to be related to the relative abundance of prey with habitat. Tope sharks werefound to prey almost exclusively upon teleost fish: small shoaling fish, mainly boarfish (Capros aper) and snipefish(Macroramphosus scolopax), were the most frequent prey. This study illustrates that thornback rays and tope sharks are top predators in waters off the Azores.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15148 | 403 | 2014-05-29 07:05:04 | 15148 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Two halfbeak species, ballyhoo (Hemiramphus brasiliensis) and balao (H. balao), are harvested as bait in south Florida waters, and recent changes in fishing effort and regulations prompted this investigation of the overlap of halfbeak fishing grounds and spawning grounds. Halfbeaks were sampled aboard commercial fishing vessels, and during fishery-independent trips, to determine spatial and temporalspawning patterns of both species. Cyclic patterns of gonadosomatic indices (GSIs) indicated that both species spawned during spring and summer months. Histological analysis demonstrated that specific stages of oocyte development can be predicted from GSI values; for example, female ballyhoo with GSIs 〉6.0 had hydrated oocytes that were 2.0−3.5 mm diameter. Diel changes in oocyte diameters and histological criteria demonstrated that final oocyte maturation occurred over a 30- to 36-hour period and that ballyhoo spawned at dusk. Hydration of oocytes began in the morning, and ovulation occurred at sunset of that same day;therefore females with hydrated oocytes were ready to spawn within hours. We compared maps of all locations where fish were collected to maps of locations where spawning females (i.e. females with GSIs 〉6.0) were collected to determinethe degree of overlap of halfbeak fishing and spawning grounds. We also used geographic information system (GIS) data to describe the depth and bottom type of halfbeak spawning grounds. Ballyhoo spawned all along the coral reef tract of the Atlantic Ocean, inshore of the reef tract, and in association with bank habitats within Florida Bay. In the Atlantic Ocean, balao spawned along the reef tract andin deeper, more offshore waters than did ballyhoo; balao were not found inshore of the coral reef tract or in FloridaBay. Both halfbeak species, considered together, spawned throughout the fishing grounds of south Florida.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15153 | 403 | 2014-05-29 07:09:24 | 15153 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Little is known about the ocean distributions of wild juvenile coho salmon off the Oregon-Washington coast. In this study we report tag recoveries and genetic mixed-stock estimates of juvenile fish caught in coastal waters near the Columbia River plume. To support the genetic estimates, we report an allozyme-frequency baseline for 89 wild and hatchery-reared coho salmon spawning populations, extending from northern California to southern British Columbia. The products of 59 allozyme-encoding loci were examined withstarch-gel electrophoresis. Of these, 56 loci were polymorphic, and 29 loci had P0.95 levels of polymorphism. Average heterozygosities within populations ranged from 0.021 to 0.046 and averaged 0.033. Multidimensional scaling of chord genetic distances between samples resolved nine regional groups that were sufficiently distinct for geneticmixed-stock analysis. About 2.9% of the total gene diversity was due to differences among populations within these regions, and 2.6% was due to differences among the nine regions. This allele-frequency data base was used to estimate the stock proportions of 730 juvenile coho salmon in offshore samples collected from central Oregon to northern Washington in June and September-October 1998−2000. Genetic mixed-stock analysis, together with recoveries of tagged or fin-clipped fish, indicates that about one half of the juveniles came from Columbia River hatcheries. Only 22% of the ocean-caught juveniles were wild fish, originating largely from coastal Oregon and Washington rivers (about 20%). Unlike previous studies of tagged juveniles, both tag recoveries and genetic estimates indicate the presence of fish from British Columbia andPuget Sound in southern waters. The most salient feature of genetic mixed stock estimates was the paucity of wildjuveniles from natural populations in the Columbia River Basin. This result reflects the large decrease in the abundances of these populations in the last few decades.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15147 | 403 | 2014-05-29 07:04:06 | 15147 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Understanding the ontogenetic relationship between juvenileSteller sea lions (Eumetopias jubatus) and their foraging habitat is key to understanding their relationship toavailable prey and ultimately their survival. We summarize dive and movement data from 13 young-of-the-year (YOY) and 12 yearling Steller sea lions equipped with satellite dive recorders in the Gulf of Alaska and Aleutian Islands (n=18), and Washington (n=7) from 1994 to 2000. A total of 1413 d of transmission (x =56.5 d, range: 14.5–104.1 d) were received. We recorded 222,073 dives, which had a mean depth of 18.4 m (range of means: 5.8−67.9 m; SD=16.4). Alaska YOY dived for shorter periods and at shallower depths (mean depth=7.7 m, mean duration=0.8 min, mean maximum depth=25.7 m, and maximum depth=252 m) than Alaskayearlings (x =16.6 m, 0=1.1 min, x = 63.4 m, 288 m), whereas Washington yearlings dived the longest and deepest (mean depth=39.4 m, mean duration=1.8 min, mean maximumdepth=144.5 m, and maximum depth=328 m). Mean distance for 564 measured trips was 16.6 km; for sea lions ≤10 months of age, trip distance (7.0 km) was significantly less than for those 〉10 months of age (24.6 km). Mean trip duration for 10 of the 25 sea lions was 12.1 h; for sea lions ≤10 months of age, trip duration was 7.5 h and 18.1 h for those 〉10 months of age.We identified three movements types: long-range trips (〉15 km and 〉20 h), short-range trips (〈15 km and 〈20 h) during which the animals left and returned to the same site, and transits to other haul-out sites. Long-range trips started around 9 months of age and occurred most frequently aroundthe assumed time of weaning, whereas short-range trips happened almost daily (0.9 trips/day, n=426 trips). Transitsbegan as early as 7 months of age, occurred more often after 9 months of age, and ranged between 6.5 and 454 km. The change in dive characteristics coincided with the assumed onset of weaning. These yearling sea lion movementpatterns and dive characteristics suggest that immature Steller sea lions are as capable of making the same typesof movements as adults.
    Keywords: Biology ; Fisheries
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    NOAA/Center for Coastal Fisheries and Habitat Research | Beaufort, NC
    In:  http://aquaticcommons.org/id/eprint/15156 | 403 | 2014-06-13 00:05:25 | 15156 | United States National Ocean Service
    Publication Date: 2021-07-03
    Description: In March of 2005, the National Oceanic and Atmospheric Administration's Special Projects Office released "Population Trends along the Coastal United States: 1980-2008." This report includes population changes and trends between 1980 and 2003 and projected changes in coastal populations by 2008. Given the findings, pressure on coastal resources around the country will continue to rise, particularly in Florida. ... One of our most valuable coastal resources is seagrass, but human desire and need to live on the coast means that our habitat overlaps with suitable seagrass habitat. Seagrasses can be found in coastal areas around the world but are limited to relatively shallow, relatively clear water because of their reliance on light for photosynthesis. Seagrasses provide food for both small and large marine organisms, larval and adult stage. They provide shelter and habitat to a variety of commercially important fish and invertebrates. They baffle the water column and inhibit the resuspension of sediments. They prevent erosion and fix and recycle nutrients. The physical and ecological benefits of seagrasses make them very important to human welfare, but their light-limited coastal distribution makes them highly susceptible to anthropogenic influences.
    Description: Report submitted to Protected Resources Division, National Marine Fisheries Service.
    Keywords: Biology ; Conservation ; Management
    Repository Name: AquaDocs
    Type: monograph
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  • 87
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    In:  http://aquaticcommons.org/id/eprint/15152 | 403 | 2014-05-29 07:08:12 | 15152 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Age and growth estimates for the blue shark (Prionace glauca) were derived from 411 vertebral centra and 43 tag-recaptured blue sharks collected in the North Atlantic, ranging in length from 49 to 312 cm fork length (FL). The vertebrae of two oxytetracycline-injected recaptured blue sharks support an annual spring deposition of growth bands in the vertebrae in sharks up to 192 cm FL. Males andfemales were aged to 16 and 15 years, respectively, and full maturity is attained by 5 years of age in both sexes.Both sexes grew similarly to age seven, when growth rates decreased in males and remained constant in females.Growth rates from tag-recaptured individuals agreed with those derived from vertebral annuli for smaller sharks but appeared overestimated for larger sharks. Von Bertalanffy growth parameters derived from vertebral length-at-age data are L∞ = 282 cm FL, K = 0.18, and t0 = –1.35 for males, andL∞ = 310 cm FL, K = 0.13, and t0 = −1.77 for females. The species grows faster and has a shorter life span than previously reported for these waters.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15158 | 403 | 2014-05-29 07:16:04 | 15158 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Percophids are a family of small marine benthic fishes common over soft bottoms from inshore to the outer slopesin tropical to temperate regions of the Atlantic and in the Indo-West and southeast Pacific (Reader and Neira, 1998; Okiyama, 2000). Five species belonging to four genera have been recorded around the Salas y Gómez Ridge in the southeast Pacific, all of which are endemic to the area except for Chrionema chryseres, a species which also occurs off the Hawaiian Islands and Japan (Parin, 1985, 1990;Parin et al., 1997). Of these five species, larval stages have been described only for Osopsaron karlik and Chrionemapallidum (Belyanina 1989, 1990).
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15167 | 403 | 2014-05-29 07:25:02 | 15167 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Stock structure of eastern Pacific yellowfin tuna was investigated by analyzing allozymes and random amplified polymorphic DNAs (RAPDs) from 10 samples of 20–30 individuals each, collected between 1994 and 1996 from fishing vessels operating in the Inter-American Tropical Tuna Commission (IATTC) yellowfin regulatory area (CYRA). Allozyme analysis resolved 28 loci, eight of which were polymorphic under the 0.95 criterion: Aat-S*, Glud, Gpi-F*, Gpi-S*, La, Lgg, Pap-F*, and 6-Pgd, resulting in a mean heterozygosity over all allozyme loci of H = 0.052. Four polymorphic RAPD loci were selected for analysis, resulting in a mean heterozygosity of H = 0.43. Eight of 45 pairwise comparisons of allozyme allele frequencies among the ten samples showed significant differences after correction for multiple testing (P〈0.0001), all of which involved comparisons with the Gulf of California sample. Confirmation of this signal of population structure would have management implications. No significant divergence in RAPD allele frequencies was observed among samples. Weir and Cockerham θ estimated for allozyme loci (θ=0.048; P〈0.05) and RAPD loci (θ=0.030; P〉0.05) revealed little population structure among samples. Mantel tests demonstrated that the genetic relationships among samples did not correspond to an isolation-by-distance model for either class of marker. Four of eight comparisons of coastal and offshore samples revealed differences of allele frequencies at the Gpi-F* locus (P〈0.05), although none of these differences was significant after correction for multiple testing (P〉0.001). Results are consistent with the hypothesis that the CYRA yellowfin tuna samples comprise a single genetic stock, although gene flow appears to be greater among coastal samples than between coastal and offshore samples.
    Keywords: Biology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15163 | 403 | 2014-05-29 07:21:13 | 15163 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: Estimates of instantaneous mortality rates (Z) and annual apparent survival probabilities (Φ) were generated from catch-curve analyses for oceanic-stage juvenile loggerheads (Caretta caretta) in the waters of the Azores. Two age distributions were analyzed: the “total sample” of 1600 loggerheads primarily captured by sighting and dipnetting from a variety of vessels in the Azores between 1984 and 1995 and the “tuna sample” of 733 loggerheads (a subset of the total sample) captured by sighting and dipnetting from vessels in the commercial tuna fleet in the Azores between 1990 and 1992. Because loggerhead sea turtles begin to emigrate from oceanic to neritic habitats at age 7, the best estimates of instantaneous mortality rate (0.094) and annual survival probability (0.911) not confounded with permanent emigration were generated for age classes 2 through 6. These estimates must be interpreted with caution because of the assumptions upon which catch-curve analyses are based. However, these are the first directly derived estimates of mortality and survival probabilities for oceanic-stage sea turtles. Estimation of survival probabilities was identified as “an immediate and critical requirement” in 2000 by the Turtle Expert Working Group of the U.S. National Marine Fisheries Service.
    Keywords: Biology ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15170 | 403 | 2014-05-29 07:32:32 | 15170 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Otoliths from blue rockfish (Sebastes mystinus), were aged by using a combination of surface and break-and-burn methods. The samples were collected between 1978 and 1998 off central and northern California. Annual growth increments in the otoliths were validated by using edge analysis for females up to age 23 and for males to age 25.The first annual growth increment was identified by comparing the diameter of the otolith from fish known to be one year old collected in May (when translucent zone formation was completed) to the mean diameter of the first translucent zone in the otoliths from older fish. Our estimated maxi-mum ages of 44 years for males and 41 years for females were much older than those reported in previous studies. Von Bertalanffy growth models were developed for each sex. Females grew faster and reached larger maximum length than males. The growth models were similar to those generated in other studies of this species in southern and central California. Fish from northern and central California had similar maximum sizes, maximum ages, and growth model parameters.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15172 | 403 | 2014-05-29 07:39:49 | 15172 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Fecundity in striped mullet (Mugil cephalus) from South Carolina correlated highly with length and weight, but not with age. Oocyte counts ranged from 4.47 × 105 to 2.52 × 106 in 1998 for fish ranging in size from 331 mm to 600 mm total length, 2.13 × 105to 3.89 × 106in 1999 for fish ranging in size from 332 mm to 588 mm total length, and 3.89 × 105 to 3.01 × 106 in 2000 for fish ranging in size from 325 mm to 592 mm total length. The striped mullet in this study had a high degree of variability in the size-at-age relation-ship; this variability was indicative of varied growth rates and compounded the errors in estimating fecundity at age. The stronger relationship of fecundity to fish size allowed a much better predictive model for potential fecundity in striped mullet. By comparing fecundity with other measures of reproductive activity, such as the gonadosomatic index, histological examination, and the measurement of mean oocyte diameters, we determined that none of these methods by themselves were adequate to determine the extent of reproductive development. Histological examinations and oocyte diameter measurements revealed that fecundity counts could be made once developing oocytes reached 0.400 μm or larger. Striped mullet are isochronal spawners; therefore fecundity estimates for this species are easier to determine because oocytes develop at approximately the same rate upon reaching 400 μm. This uniform development made oocytes that were to be spawned easier to count. When fecundity counts were used in conjunction with histological examination, oocyte diameter measurements, and gonadosomatic index, a more complete measure of reproductive potential and the timing of the spawning season was possible. In addition, it was determined that striped mullet that recruit into South Carolina estuaries spawn from October through April.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15168 | 403 | 2014-05-29 07:25:58 | 15168 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Lengths and ages of sword-fish (Xiphias gladius) estimated from increments on otoliths of larvae collected in the Caribbean Sea, Florida Straits, and off the southeastern United States, indicated two growth phases. Larvae complete yolk and oil globule absorption 5 to 6 days after hatching (DAH). Larvae 〈13 mm preserved standard length (PSL) grow slowly (~0.3 mm/d); larvae from 13 to 115 mm PSL grow rapidly (~6 mm/d). The acceleration in growth rate at 13 days follows an abrupt (within 3 days) change in diet, and in jaw and alimentary canal structure. The diet of swordfish larvae is limited. Larvae 〈8 mm PSL from the Caribbean, Gulf of Mexico, and off the southeastern United States eat exclusively copepods, primarily of one genus, Corycaeus. Larvae 9 to 11 mm eat copepods and chaetognaths; larvae 〉11 mm eat exclusively neustonic fish larvae. This diet indicates that young larvae 〈11 mm occupy the near-surface pelagia, whereas, older and longer larvae are neustonic. Spawning dates for larvae collected in various regions of the western North Atlantic, along with the abundance and spatial distribution of the youngest larvae, indicate that spawning peaks in three seasons and in five regions. Swordfish spawn in the Caribbean Sea, or possibly to the east, in winter, and in the western Gulf of Mexico in spring. Elsewhere swordfish spawn year-round, but spawning peaks in the spring in the north-central Gulf of Mexico, in the summer off southern Florida, and in the spring and early summer off the southeastern United States. The western Gulf Stream frontal zone is the focus of spawning off the southeastern coast of the United States, whereas spawning in the Gulf of Mexico seems to be focused in the vicinity of the Gulf Loop Current. Larvae may use the Gulf of Mexico and the outer continental shelf off the east coast of the United States as nursery areas. Some larvae may be transported northward, but trans-Atlantic transport of larvae is unlikely.
    Keywords: Biology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15165 | 403 | 2014-05-29 07:23:08 | 15165 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Portunus pelagicus was collected at regular intervals from two marine embayments and two estuaries on the lower west coast of Australia and from a large embayment located approximately 800 km farther north. The samples were used to obtain data on the reproductive biology of this species in three very different environments. Unlike females, the males show a loosening of the attachment of the abdominal flap to the cephalothorax at a prepubertal rather than a pubertal molt. Males become gonadally mature (spermatophores and seminal fluid present in the medial region of the vas deferentia) at a very similar carapace width (CW) to that at which they achieve morphometric maturity, as reflected by a change in the relative size of the largest cheliped. Logistic curves, derived from the prevalence of mature male P. pelagicus, generally had wider confidence limits with morphometric than with gonadal data. This presumably reflects the fact that the morphometric (allometric) method of classifying a male P. pelagicus as mature employs probabilities and is thus indirect, whereas gonadal structure allows a mature male to be readily identified. However, the very close correspondence between the CW50’s derived for P. pelagicus by the two methods implies that either method can be used for management purposes. Portunus pelagicus attained maturity at a significantly greater size in the large embayment than in the four more southern bodies of water, where water temperatures were lower and the densities of crabs and fishing pressure were greater. As a result of the emigration of mature female P. pelagicus from estuaries, the CW50’s derived by using the prevalence of mature females in estuaries represent overestimates for those populations as a whole. Estimates of the number of egg batches produced in a spawning season ranged from one in small crabs to three in large crabs. These data, together with the batch fecundities of different size crabs, indicate that the estimated number of eggs produced by P. pelagicus during the spawning season ranges from about 78,000 in small crabs (CW=80 mm) to about 1,000,000 in large crabs (CW=180 mm).
    Keywords: Biology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15171 | 403 | 2014-05-29 07:39:21 | 15171 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: The reproductive activity and recruitment of white mullet (Mugil curema) was determined by observations of gonad development and coastal juvenile abundance from March 1992 to July 1993. Adults were collected from commercial catches at three sites in northeastern Venezuelan waters. Spawning time was determined from the observation of macroscopic gonadal stages. Coastal recruitment was determined from fish samples collected biweekly by seining in La Restinga Lagoon, Margarita Island, Venezuela. The examination of daily growth rings on the otoliths of coastal recruits was used to determine their birth date and estimate the period of successful spawning. Fish with mature gonads were present throughout the year but were less frequent between September and January when spawning individuals migrated offshore. In both years, juvenile recruitment to the lagoon was highest between March and June when high densities of 25–35 mm juveniles were observed. Back-calculated hatching-date frequency distributions revealed maximum levels of successful spawning in December–January that were significantly correlated with periods of enhanced upwelling. The relation between the timing of successful spawning and the intensity of coastal recruitment in white mullet was likely due to variations in food availability for first-feeding larvae as well as to variations in the duration of the transport of larvae shoreward as a result of varying current conditions associated with upwelling.
    Keywords: Biology ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15177 | 403 | 2014-05-29 07:45:12 | 15177 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Sea turtles are subjected to involuntary submergence and potential mortality due to incidental capture by the commercial shrimp fishing industry. Despite implementation of turtle excluder devices (TEDs) to reduce at-sea mortality, dead stranded turtles continue to be found in near-record numbers along the coasts of the western Atlantic Ocean and northern Gulf of Mexico. Although this mortality may be due to an increase in the number of turtles available to strand, one alternative explanation is that sea turtles are repetitively submerged (as one fishing vessel follows the path of another) in legal TEDs. In the present study, laboratory and field investigations were undertaken to examine the physiological effects of multiple submergence of loggerhead sea turtles (Caretta caretta). Turtles in the laboratory study were confined during the submersion episodes, whereas under field conditions, turtles were released directly into TED-equipped commercial fishing nets. Under laboratory and field conditions, pre- and postsubmergence blood samples were collected from turtles submerged three times at 7.5 min per episode with an in-water rest interval of 10, 42, or 180 min between submergences. Analyses of pre- and postsubmergence blood samples revealed that the initial submergence produced a severe and pronounced metabolic and respiratory acidosis in all turtles. Successive submergences produced significant changes in blood pH, Pco2, and lactate, although the magnitude of the acid-base imbalance was substantially reduced as the number of submergences increased. In addition, increasing the interval between successive submergences permitted greater recovery of blood homeostasis. No turtles died during these studies. Taken together, these data suggest that repetitive sub-mergence of sea turtles in TEDs would not significantly affect their survival potential provided that the animal has an adequate rest interval at the surface between successive submergences.
    Keywords: Biology ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15178 | 403 | 2014-05-29 07:46:20 | 15178 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: The sectioned otoliths of four fish species from a tropical demersal trawl fishery in Western Australia revealed a series of alternating trans-lucent and opaque zones in reflected light. The translucent zones, referred to as growth rings, were counted to determine fish ages. The width of the opaque zone on the periphery of the otolith section as a proportion of the width of the previous opaque zone (index of completion) was used to determine the periodicity of growth-ring formation.This article describes a method for modeling changes in the index of ring completion over time, from which a parameter for the most probable time of growth-ring formation (with confidence intervals) can be determined. The parameter estimate for the timing of new growth-ring formation for Lethrinus sp. 3 was from mid July to mid September, for Lutjanus vitta from early July to the end of August, for Nemipterus furcosus from mid July to late September, and for Lutjanus sebae from mid July to mid November. The confidence intervals for the timing of formation of growth rings was variable between species, being smallest for L. vitta, and variable between fish of the same species with different numbers of growth rings.The stock assessments of these commercially important species relies on aging information for all the age classes used in the assessment. This study demonstrated that growth rings on sectioned otoliths were laid down annually, irrespective of the number of growth rings, and also demonstrated that the timing of ring formation for these tropical species can be determined quantitatively (with confidence intervals.
    Keywords: Biology ; Ecology ; Fisheries
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  • 98
    Publication Date: 2021-07-04
    Keywords: Biology ; Chemistry ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15185 | 403 | 2014-05-30 07:02:11 | 15185 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Distribution, abundance, and several population features were studied in Ensenada de La Vela (Venezuela) between 1993 and 1998 as a first step in the assessment of local fisheries of swimming crabs. Arenaeus cribrarius was the most abundant species at the marine foreshore. Callinectes danae prevailed at the estuarine location. Callinectes bocourti was the most abundant species at the offshore. Abundances of A. cribrarius and C. danae fluctuated widely and randomly. Ovigerous females were almost absent. Adults of several species were smaller than previously reported. This study suggests that fisheries based on these swimming crabs probably will be restricted to an artisanal level because abundances appear too low to support industrial exploitation.
    Keywords: Biology ; Ecology ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15184 | 403 | 2014-05-29 07:55:35 | 15184 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Otolith thermal marking is an efficient method for mass marking hatchery-reared salmon and can be used to estimate the proportion of hatchery fish captured in a mixed-stock fishery. Accuracy of the thermal pattern classification depends on the prominence of the pattern, the methods used to prepare and view the patterns, and the training and experience of the personnel who determine the presence or absence of a particular pattern. Estimating accuracy rates is problematic when no secondary marking is available and no error-free standards exist. Agreement measures, such as kappa (κ), provide a relative measure of the reliability of the determinations when independent readings by two readers are available, but the magnitude of κ can be influenced by the proportion of marked fish. If a third reader is used or if two or more groups of paired readings are examined, latent class models can provide estimates of the error rates of each reader. Applications of κ and latent class models are illustrated by a program providing contribution estimates of hatchery-reared chum and sockeye salmon in Southeast Alaska.
    Keywords: Biology ; Chemistry ; Fisheries
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