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  • 1
    Publication Date: 2021-06-28
    Description: Molecular markers based on mitochondrial DNA (mtDNA) are extensively used to study genetic relationships. mtDNA has been used in phylogenetic studies to understand the evolutionary history of species because it is maternallyinherited and is not subject to genetic recombination (Gyllensten et al., 1991). The high mutation rate ofmtDNA makes it a useful tool for differentiating between closely related species (Brown et al., 1979)—a tool that is especially important when significant variations occur between species, but not within species (Hill et al., 2001; Blair et al., 2006; Chow et al., 2006a).
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 204-212
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  • 2
    Publication Date: 2021-06-29
    Description: Los peces constituyen uno de los atractivos principales en los arrecifes coralinos para el buceoturístico, por lo cual resulta necesario monitorear su abundancia y valores estéticos. El objetivo de estainvestigación fue evaluar el estado de conservación de las asociaciones de peces arrecifales en cuatro delos principales polos turísticos del Archipiélago Sabana-Camagüey, Cuba en el año 2010. Semuestrearon 23 sitios de buceo turísticos en áreas adyacentes a las regiones de Varadero (5 sitios),cayos de Villa Clara (6 sitios), Cayo Coco (6 sitios) y Santa Lucia (6 sitios). En cada uno de ellos serealizaron seis réplicas de censos visuales de todas las especies de peces en recorridos lineales de 50 mde largo por 2 m de ancho, ocupando un área total de 600 m2. El puntaje más alto de conservación lopresentó los cayos de Villa Clara (37), siguiéndole en orden decreciente Cayo Coco (35), y con valoresmás bajos Varadero (24) y Santa Lucia (22). Los puntajes de las cuatro regiones fueron inferiores a losencontrados en otros arrecifes de Cuba y el Caribe. Los valores de Varadero y Santa Lucia secorrespondieron con los de arrecifes de hábitats degradados y sometidos a explotación pesquera. Engeneral, en la mayoría de las regiones predominaron peces de talla pequeña (〈20 cm) pertenecientes alas familias Pomacentridae y Labridae y hubo poca abundancia de peces carnívoros y herbívoros demediana (20-40 cm) y gran talla (〉40 cm).ABSTRACTFish are one of the main attractions on coral reefs for diving tourism; therefore, it is necessary tomonitor their condition and aesthetic values. The objective of this research was to evaluate the status ofreef fish assemblages in four tourist areas of Sabana-Camaguey Archipelago, Cuba in 2010. Twentythreetourist diving sites were sampled in adjacent areas to regions of Varadero (five sites), Villa Clarakeys (6 sites), Coco key (6 sites) and Santa Lucia (6 sites). In each region, six replicated visual census ofall fish species were conducted along belt transects of 50 m length and 2 m width, occupying a total areaof 600 m2. The highest conservation score was obtained by Villa Clara keys (37), followed in decreasingorder by Coco key (35), and with lower values Varadero (24) and St. Lucia (22). The scores of the fourregions were lower than the values of other Cuban and Caribbean reefs. The values of Varadero andSanta Lucia corresponded to reefs with degraded habitats and subject to overfishing. In general, small fish(〈 20 cm) from families Pomacentridae and Labridae, and low abundance of carnivore and herbivore fishof middle (20-40 cm) and large size (〉 40 cm) predominated in most regions.
    Description: GEF-PNUD
    Keywords: Conservation ; Ecology ; Cayo Coco ; Santa Lucia ; GEF-PNUD ; Varadero
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 76-94
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  • 3
    Publication Date: 2021-06-30
    Description: RESUMENSe comparó el grado de resiliencia de seis crestas arrecifales del este del golfo de Batabanó, Cuba. Tres fueron del norte del golfo de Cazones (Tramo Norte) y las restantes, del oeste de Cayo Largo (Tramo Sur). Las del primer tramo fueron las de faro Cazones, Norte de la cresta de cayo Diego Pérez y de faro Diego Pérez. Las otras tres fueron las de cayo Rico, arrecifes Los Ballenatos y arrecifes Hijos de Los Ballenatos. Se emplearon los indicadores biológicos del Protocolo AGRRA. El Tramo Norte presentó las crestas más resilientes, sobre todo la de faro Cazones. Las del Tramo Sur no exhibieron resiliencia. Fueron varios e interrelacionados, los factores aparentemente más determinantes en la resiliencia. Entre estos, cuatro se consideraron como fuerzas motrices: resguardo contra el oleaje, circulación habitual giratoria ciclónica en la ensenada de Cazones, entrada de nutrientes provenientes tanto de la ciénaga de Zapata como de aguas profundas, y abundancia del erizo herbívoro Diadema antillarum. Los demás factores, desencadenados por los anteriores y también interrelacionados, fueron, al parecer la menor afectación por oleaje y sedimentos, estabilización de fragmentos vivos de coral, índices favorables de macroalgas bentónicas, cierta retención de nutrientes y plancton, más alimentación heterotrófica de los corales, mayor auto reclutamiento de corales y del erizo Diadema; mejores condiciones para el asentamiento y viabilidad de los reclutas, y para el recapamiento de corales; mayor crecimiento y recuperación de los corales y mejores condiciones térmicas contra el blanqueamiento de coralesABSTRACTThe degree of resilience of six reef crest sites was compared at the east of the Gulf of Batabano, Cuba. Three of them were located north of the Gulf of Cazones (Northern Stretch), while the remaining ones were west of Cayo Largo (Southern Stretch). Those of the Northern Stretch were “Faro Cazones”, north of the crest of cayo Diego Pérez and “Faro Diego Pérez”. The remaining sites were those of the cayo Rico, Los Ballenatos reefs, and Hijos de Los Ballenatos reefs. The AGRRA biological indicators were applied. The Northern Stretch presented the most resilient crests, mainly that of “Faro Cazones”. Those of the Southern Stretch did not reveal signs of resilience. Several interrelated factors were apparently more linked to resilience. Four of them were considered as driving forces: shelter from waves, usual cyclonic revolving water circulation in the Ensenada de Cazones, nutrient input from the Zapata swamp and deep water, and the abundance of the herbivore sea urchin Diadema antillarum. Triggered by these driving forces, the remaining factors apparently were less effect of waves and sediments, stabilization of live coral fragments, favorable benthic macro-algae indices, some retention of nutrient and plankton, increased coral heterotrophic feeding; better conditions for recruit settlement and viability, and for coral re-sheeting; faster coral growth and recuperation and better thermal conditions against coral bleaching.
    Description: GEF-PNUD
    Keywords: Conservation ; Ecology ; Iniciativa Trinacional Cuba-México-EE.UU. ; cambio climático ; Conservación del Golfo de México ; Caribe Occidental
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 49-75
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  • 4
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    In:  http://aquaticcommons.org/id/eprint/15030 | 403 | 2014-06-01 19:04:52 | 15030 | United States National Marine Fisheries Service
    Publication Date: 2021-07-01
    Description: Between June 1995 and May 1996 seven rookeries in the Gulf of California were visited four times in order to collect scat samples for studying spatial and seasonal variability California sea lion prey. The rookeries studied were San Pedro Mártir, San Esteban, El Rasito, Los Machos, Los Cantiles, Isla Granito, and Isla Lobos. The 1273 scat samples collected yielded 4995 otoliths (95.3%) and 247 (4.7%) cephalopod beaks. Fish were found in 97.4% of scat samples collected, cephalopods in 11.2%, and crustaceans in 12.7%. We identified 92 prey taxa to the species level, 11 to genus level, and 10 to family level, of which the most important were Pacific cutlassfish (Trichiurus lepturus),Pacific sardine (Sardinops caeruleus), plainfin midshipman (Porichthys spp.), myctophid no. 1, northern anchovy(Engraulis mordax), Pacific mackerel (Scomber japonicus), anchoveta (Cetengraulis mysticetus), and jack mackerel(Trachurus symmetricus). Significant differences were found among rookeries in the occurrence of all main prey(P≤0.04), except for myctophid no. 1 (P〉0.05). Temporally, significant differences were found in the occurrenceof Pacific cutlassfish, Pacific sardine, plainfin midshipman, northern anchovy, and Pacific mackerel (P〈0.05),but not in jack mackerel (χ 2=2.94, df=3, P=0.40), myctophid no. 1 (χ 2=1.67, df= 3, P=0.64), or lanternfishes (χ 2=2.08, df=3, P=0.56). Differences were observed inthe diet and in trophic diversity among seasons and rookeries. More evident was the variation in diet in relation to availability of Pacific sardine.
    Keywords: Ecology ; Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 47-62
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  • 5
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    In:  guillermoharris@speedy.com.ar | http://aquaticcommons.org/id/eprint/16720 | 9602 | 2016-05-04 14:39:12 | 16720 | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
    Publication Date: 2021-07-08
    Description: El riesgo de extinción de la ballena franca se debe principalmente a la caza indiscriminada de la que ha sido víctima hasta bien pasada la segunda mitad del siglo XX. Este artículo de divulgación científica da a conocer el estado actual de la evolución de la población a partir estudios realizados en una zona muy frecuentada por estos cetáceos, la Península Valdés (Prov. Chubut, Argentina). Se incluyen datos sobre el crecimiento de la población, mortandad, y señales que aún preocupan. Se referencian también otras lecturas sugeridas sobre la temática.
    Description: Reprinted as: pp.203-210 in, Ciencia del Mar. Volumen temático 1, 12/2014; Asociación Ciencia Hoy. ISBN: 978-987-45584-0-4 (Special issue dedicated to 'Marine Sciences: 1988-2014')
    Keywords: Biology ; Conservation ; Ecology ; Eubalaena australis ; PSW ; Argentina ; Patagonia ; Valdes Peninsula ; marine environment ; marine mammals ; nature conservation ; behaviour ; growth ; mortality ; population number ; aerial surveys ; protected resources
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 37-43
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  • 6
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    In:  ulyssesmontojo@gmail.com | http://aquaticcommons.org/id/eprint/27090 | 25026 | 2020-08-21 04:28:09 | 27090 | National Fisheries Research and Development Institute, Philippines
    Publication Date: 2021-07-24
    Description: Waste from aquaculture is considered as one of the possible causes of water quality deterioration in Manila Bay. Aquaculture in the area accounts for almost 30% of the total production in the Philippines. This high production entails intensified application of inputs that could possibly contribute to the nutrient (nitrogen, N and phosphorus, P) load in the bay. Thus, estimation of the N, P and SO4 loaded from aquaculture farms is necessary to develop more responsive intervention to reduce nutrient load in Manila Bay. Water samples were collected throughout the rearing period from different aquaculture systems in Cavite, Bulacan, Pampanga, and Bataan. The annual estimated N and P loaded from aquaculture farms were 12, 696.66 MT and 2, 363.01 MT, respectively. Fish pens/cages recorded the highest contribution accounting for 88% N and 86% P of the total load. It can be attributed to the direct release of uneaten feeds into the bodies of water. Roughly, 12% N and 14% P were obtained from the fishponds. Furthermore, the annual SO4 loaded from fishponds was estimated at 36,917.54 MT. Results of the study suggested that there should be an extensive monitoring of the environmental impacts and annual load of aquaculture farms for the sustainable regulations and management of aquaculture activities to reduce nutrient load and improve the aquaculture production as well. Finally, strict compliance to the regulatory guidelines and ordinances must be imposed to achieve the effluent quality standards.
    Description: Bureau of Fisheries and Aquatic Resources
    Keywords: Aquaculture ; Chemistry ; Ecology ; Environment ; Pollution ; fishponds ; fish pens/cages ; nitrogen ; phosphorus ; nutrient load
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 30-39
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  • 7
    Publication Date: 2021-05-19
    Description: The mean objetives ofthe present study were to establish the existence of demersal fish associations in the shelf and superior slope of the Colombian Caribbean northern zone and determine if the biotical patterns determineted by these associations are correlationed with the patterns structured by the environmental conditions evaluated. Data were taken from three demersal resources assessment surveys of the INPA-VECEP/UE Program, carried out during the period 1995-1996. The station groups were not consistent in terms of species composition along the different periods. The dominant characteristics of demersal species associations was the absence of temporal persistence. Only it was possible to find some partial associations which remain during a maximum oftwo sampling periods: Rhomboplites aurorubens/Priacanthus arenatus, Lutjanus analis/Lutjanus synagris y Eucinostomus argenteus/Upeneus parvus. It were observed seasonal changes in the set of environmental variables which better explain the community structure, but depth always appears in the optimal correlation set. Apparently, species co-existence is rather due to a common answer to environmental gradients, than to species interactions: Nevertheless, the relatively low correlations seem to indicate that other factors, like migrations for biological reasons, could also affect the structure and composition of demersal fish associations, on a smaller time scale.
    Description: El presente estudio se centró en los objetivos de establecer la existencia de asociaciones de peces demersales en la plataforma y el talud superior de la zona norte del Caribe colombiano, y determinar si los patrones bióticos determinados por estas asociaciones se correlacionan con los patrones estructurados por las condiciones ambientales evaluadas. Los datos del estudio provinieron de tres campañas de evaluación de recursos demersales del Programa INPA-VECEP/UE, efectuadas durante el período 1995-1996. La característica dominante de los grupos de estaciones y de las asociaciones de peces demersales fue la carencia de persistencia temporal. Únicamente fue factible establecer la persistencia de algunas asociaciones parciales durante un máximo de dos períodos de muestreo, como fue el caso de Rhomboplites aurorubens/Priacanthus arenatus, Lutjanus analis/Lutjanus synagris y Eucinostomus argenteus/Upeneus parvus. Se presentaron cambios estacionales en el conjunto de variables ambientales que explicaron de mejor forma la estructura comunitaria, a excepción de la profundidad, que siempre figuró en la combinación que produjo la correlación óptima. Los cambios en los patrones bióticos parecen señalar que la co-existencia de las especies se debe básicamente a una respuesta común a los radientes ambientales, antes que a interacciones entre especies. Sin embargo, el hecho de que estas correlaciones fuesen relativamente bajas parece indicar que a una escala de tiempo menor otros factores, tales como posibles migraciones por razones biológicas,también podrían afectar la estructura y composición de las asociaciones de peces demersales.
    Description: Published
    Description: Assemblages; Lutjanidae
    Keywords: Demersal fisheries ; Ecology ; Demersal fisheries ; Ecology
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 8
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    In:  http://aquaticcommons.org/id/eprint/8987 | 403 | 2012-09-26 20:39:44 | 8987 | United States National Marine Fisheries Service
    Publication Date: 2021-06-30
    Description: Blacktail comber (Serranus atricauda G
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 159-166
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  • 9
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    In:  http://aquaticcommons.org/id/eprint/8990 | 403 | 2012-08-03 18:36:53 | 8990 | United States National Marine Fisheries Service
    Publication Date: 2021-06-30
    Description: Fishery catch data on yellowfin tuna (Thunnus albacares) were examined to study the effects of El Niño events between 1990 and 1999 for an area in the northeastern tropical Pacific (18−24°N, 112−104°W). The data were extracted from a database of logbook records from the Mexican tuna purse-seine f leet. Latitudinal distribution of the catches increased from south to north for the 10-year period. Highest catches and effort were concentrated between 22°N and 23°N. This area accumulated 48% of the total catch over the 10year period. It was strongly correlated with El Niño-Southern Oscillation (ENSO) events. At least two periods of exceptionally high catches occurred following El Niño events in 1991 and 1997. Peaks of catches were triggered by the arrival of positive anomalies of sea surface temperature (SST) to the area. A delay of two to four months was observed between the occurrence of maximum SST anomalies at the equator and peaks of catch. Prior to these two events, negative SST anomalies were the dominant feature in the study area and catch was extremely low. This trend of negative SST anomalies with low catches followed by positive SST anomalies and high catches may be attributed to northward yellowfin tuna migration patterns driven by El Niño forcing, a result that contrasts with the known behavior of decreasing relative abundance of these tuna after El Niño events in the eastern Pacific. However, this decrease in relative abundance may be the result of a local or subregional effect.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 197-203
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  • 10
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    In:  library@seafdec.org.ph | http://aquaticcommons.org/id/eprint/20131 | 2002 | 2016-03-04 14:31:59 | 20131 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Publication Date: 2021-07-08
    Keywords: Ecology ; Philippines ; Visayas I. ; Antique ; Malalison I. ; marine environment ; Aquatic animals ; Bathymetric surveys ; Community composition ; Coral ; Coral reefs ; Dominant species ; Geological maps ; Marine plants ; Reefs ; Species diversity
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: pp.23-25, 28
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