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  • Aquaculture  (3,875)
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  • 1
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/10990 | 115 | 2013-03-18 12:53:47 | 10990 | WorldFish Center
    Publication Date: 2021-06-25
    Description: This document presents ex-ante impact evaluations of research for development projects related to aquaculture in Bangladesh, Malawi and Ghana. The Ghana chapter also includes an ex-ante evaluation of a fisheries project. The case studies utilized preliminary versions of guidelines developed specifically for ex-ante evaluations of aquaculture and fisheries projects. The guidelines, found in A Practical Guide for Ex-Ante Impact Evaluations in Fisheries and Aquaculture, are designed to provide an approach for a qualitative examination of the potential for a project to deliver impacts. Using a conceptual framework based on the outcome focus of results-based management, the guidelines stress careful examination of the setting, internal consistency, a sound theory of change, and an examination of stakeholders’ interests and potential partnerships. The case study reports illustrate the variability with which the guidelines may be interpreted and applied. The different teams, operating with limited time and budget that constrained the collection of new data, were forced to utilize existing secondary data and information and consult with key stakeholders to complete their analyses. The varying levels of reporting reflect the differences among the cases in the amounts of existing information and variety of stakeholders potentially involved in the projects being examined.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Aquaculture ; Aquaculture ; Impact assessment ; Malawi ; Bangladesh ; Ghana
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
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  • 2
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    In:  J.Oehlenschlaeger@gmx.net | http://aquaticcommons.org/id/eprint/11132 | 1240 | 2013-04-08 18:42:57 | 11132 | Johann Heinrich von Thünen-Institut, Bundesforschungsinstitut für Ländliche Räume, Wald und Fischerei
    Publication Date: 2021-06-28
    Description: KurzfassungZahlreiche Fischereierzeugnisse aus dem Deutschen Handel wurden auf ihren Gehalt an Cholesterol hin analysiert. ZurAnalyse gelangten 38 verschiedene Dauerkonserven von acht Fischarten, 4 Produkte kalt geräucherter AtlantischerZuchtlachs in Scheiben, 10 Garnelenarten und 25 Fischstäbchenerzeugnisse von 5 Tierarten in Verbraucherpackungen. Bei den Dauerkonserven lagen die Gehalte zwischen 24 und 40 mg/100 g. Zwei Ausnahmen bildeten Sprottenkonserven mit durchschnittlich 107 mg/100 g und Oktopuskonserven mit 196 mg/100 g. Die Garnelenarten variierten zwischen 84 und 161 mg/100g. Die kalt geräucherten Lachsscheiben wiesen nur eine kleine Bandbreite im Cholesterolgehalt zwischen 38 und 43mg/100 g auf. Alle Fischstäbchen aus Magerfischen enthielten niedrige Gehalte an Cholesterol (Pangasius hypophthalmus 25, Seehecht 19, Seelachs 31 und Alaska Seehecht 28 mg/100 g), während die zwei Proben aus Tintenfischen über 100 mg/100 g lagen.AbstractNumerous fishery products from the German market have been analysed for their content of cholesterol. In total 38 different canned fishery products produced from 8 species, 4 products of sliced cold smoked Atlantic salmon, 10 species of crustacean shellfish and 25 different brands of consumer packages of fish fingers (produced from 5 species) were investigated. Canned fishery products contained amounts of cholesterol ranging from 24 to 40 mg/100 g. However, canned sprats exhibit cholesterol content as high as 107 mg/100g and canned octopus 196 mg/100 g. Crustacean shellfish was found to contain cholesterol content between 84 and 161 mg/100 g depending of species. Sliced cold smoked salmon in 200 g consumer packages showed only a little variation in cholesterol content (38-43 mg/100 g). In all fish fingers produced from lean fish species lowcholesterol content (pangasius or sutchi catfish 25, hake 19, saithe 31, and Alaska Pollack 28 mg/100 g, respectively) was found, whereas two products produced from squid exceeded 100 mg/100 g.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute of Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung - Information on Fishery Research in 2010
    Keywords: Chemistry ; Fisheries ; Information Management ; fish products ; consumer protection ; chemical analysis ; nutrition advice ; healthy nutrition
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 71-79
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  • 3
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    International Collective in Support of Fishworkers | Chennai, India
    In:  http://aquaticcommons.org/id/eprint/11174 | 25 | 2013-06-02 15:32:33 | 11174 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-28
    Description: Contents: ITQs in New Zealand.Finfish Farming in Atlantic Canada.Sustainable Small-scale Fisheries.Salmon Aquaculture in Chile.South Africa’s Fisheries Policy.Voluntary Guidelines for SSF
    Description: ISSN 0973-1121
    Keywords: Aquaculture ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 54
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  • 4
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    International Collective in Support of Fishworkers | Chennai, India
    In:  http://aquaticcommons.org/id/eprint/11173 | 25 | 2013-06-02 15:46:04 | 11173 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-28
    Description: Contents: Catch Shares in Fisheries.South Africa’s Small-scale Fishing Policy.WFFP General Assembly.Ecolabels and Sustainable Seafood in the UK.MPAs in Costa Rica.Indigenous Fishing Rights in Chile
    Description: ISSN 0973-1121
    Keywords: Aquaculture ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 54
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  • 5
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    In:  hartmut.rehbein@mri.bund.de | http://aquaticcommons.org/id/eprint/11167 | 1240 | 2013-05-17 07:56:42 | 11167 | Johann Heinrich von Thünen-Institut, Bundesforschungsinstitut für Ländliche Räume, Wald und Fischerei
    Publication Date: 2021-06-28
    Description: To ensure the authentication of fishery products lacking biological characters, rapid species identification methods are required. Two DNA- and protein-based methods, PCR-SSCP (polymerase chain reaction - single strand conformation polymorphism) of a 464 bp segment of the cytochrome b – gene and isoelectric focusing (IEF) of water-soluble proteins from fish fillets, were applied to identify fillets of (sub-) tropical fish species available on the European market. Among the samples analysed weretwo taxonomically identified species from the family Sciaenidae and one from Sphyraenidae. By comparison of DNA- and protein patterns of different samples, information about intra-species variability of patterns,and homogeneity of batches (e.g. fillet blocks or bags) can be obtained. PCR-SSCP and IEF may be useful for pre-checking of a large number of samples by food control laboratories.ZusammenfassungZur Sicherstellung der Authentizität von Fischerei-Erzeugnissen ohne biologische Merkmale sind schnelle Verfahren zur Speziesidentifizierung hilfreich. Zwei Methoden der DNA- bzw. Protein-Analyse wurden eingesetzt, um Filets (sub-) tropischer Fischarten, die auf dem europäischen Markt angeboten werden, zu identifizieren. Bei diesen Methoden handelt es sich um die PCR-SSCP (Polymerase-Kettenreaktion – Einzelstrang-Konformationspolymorphismus) – Analyse der PCR-Produkte und die IEF (isoelektrische Fokussierung) der wasserlöslichen Fischmuskelproteine. Unter den untersuchten Proben waren zwei taxonomisch bestimmte Arten aus der Familie Sciaenidae und eine Spezies aus der Familie Sphyraenidae. Durch Vergleich der DNA- bzw. Proteinmuster lassen sich Informationen über die intra-spezifische Variabilität solcher Muster und die Einheitlichkeit von Partien (beispielsweise Filetblöcke oder Filetbeutel) gewinnen. PCR-SSCP und IEF könnenin Laboratorien der Lebensmittelüberwachung als Vortest gerade bei hohen Probenzahlen sinnvoll eingesetzt werden.
    Description: Johann Heinrich von Thünen-Institute, Federal Research Institute of Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung - Information on Fishery Research in 2010
    Keywords: Chemistry ; Fisheries ; fish species identification ; PCR ; SSCP ; IEF ; Sciaenidae ; Sphyraenidae ; Fischarten-Identifizierung
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 81-89
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  • 6
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    International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/11184 | 25 | 2015-09-24 08:22:47 | 11184 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-29
    Description: ISSN 0973-1156
    Keywords: Aquaculture ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 7
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    International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/11185 | 25 | 2015-09-24 08:21:49 | 11185 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-29
    Keywords: Aquaculture ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 8
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    International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/11180 | 25 | 2015-09-24 08:24:52 | 11180 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-29
    Description: ISSN 0973-1156
    Keywords: Aquaculture ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 9
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    International Collective in Support of Fishworkers (ICSF) | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/11183 | 25 | 2015-09-24 08:23:16 | 11183 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-29
    Keywords: Aquaculture ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 10
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    International Collective in Support of Fishworkers | Chennai, India
    In:  icsf@icsf.net | http://aquaticcommons.org/id/eprint/11182 | 25 | 2015-09-24 08:23:48 | 11182 | International Collective in Support of Fishworkers
    Publication Date: 2021-06-29
    Description: ISSN 0973-1156
    Keywords: Aquaculture ; Fisheries ; Sociology
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 12
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  • 11
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/11218 | 115 | 2013-06-14 14:13:17 | 11218 | WorldFish Center
    Publication Date: 2021-06-29
    Description: This report presents the findings and recommendations of a strategic planning mission to reevaluate the feasibility of WorldFish implementing a fish value chain research program in Uganda under the CGIAR Research Program on Livestock and Fish (L&F). The over-arching goal of L&F is to increase productivity of small-scale livestock and fish systems so as to increase availability and affordability of meat, milk and fish for poor consumers and, in doing so, to reduce poverty through greater participation by the poor along animal source food value chains. This will be achieved by making a small number of carefully selected animal source food value chains function better, for example by identifying and addressing key constraints and opportunities (from production to consumption), improving institutional arrangements and capacities, and supporting the establishment of enabling pro-poor policy and institutional environments.
    Description: CGIAR Research Program 3.7 Livestock & Fish
    Keywords: Aquaculture ; Aquaculture ; Uganda
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 16
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  • 12
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/11256 | 115 | 2013-07-23 09:58:18 | 11256 | WorldFish Center
    Publication Date: 2021-06-30
    Description: In late 2012, a governance assessment was carried out as part of the diagnosis phase of rollout of the CGIAR Aquatic Agricultural Systems Program in Malaita Hub in Solomon Islands. The purpose of the assessment was to identify and provide a basic understanding of essential aspects of governance related to Aquatic Agricultural Systems in general, and more specifically as a case study in natural resource management. The underlying principles of the approach we have taken are drawn from an approach known as “Collaborating for Resilience” (CORE), which is based on bringing all key stakeholders into a process to ensure that multiple perspectives are represented (a listening phase), that local actors have opportunities to influence each other’s understanding (a dialogue phase), and that ultimately commitments to action are built (a choice phase) that would not be possible through an outsider’s analysis alone. This report begins to address governance from an AAS perspective, using input from AAS households and other networked stakeholders. We attempt to summarize governance issues that are found not only within the community but also, and especially, those that are beyond the local level, both of which may need to be addressed by the AAS program.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Agriculture ; Aquaculture ; Aquatic Agricultural Systems ; Governance
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 17
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  • 13
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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
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  • 14
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    In:  SF@ti.bund.de | http://aquaticcommons.org/id/eprint/12411 | 1240 | 2014-03-03 19:49:17 | 12411 | Johann Heinrich von Thünen-Institut, Bundesforschungsinstitut für Ländliche Räume, Wald und Fischerei
    Publication Date: 2021-06-30
    Description: “Institut für Küsten- und Binnenfischerei” was an independent Institute. Later, it was transferred to the „Institut für Seefischerei“.
    Keywords: Fisheries ; feeding experiments ; Aquaculture ; Salmo gairdnerii ; Rainbow Trout ; penicillin residues ; fish feeding ; Vitamin T ; growth
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 16-17
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  • 15
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    Chesapeake Biological Laboratory | Solomons Island, MD
    In:  http://aquaticcommons.org/id/eprint/12428 | 130 | 2014-02-08 03:58:43 | 12428 | University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory
    Publication Date: 2021-06-30
    Description: The present study was aimed at determining the food habits of hatchery-produced, pond-cultured shad (Alosa sapidissima) reared to a total length of approximately two inches. More specifically, the objectives were to determine: (1) That point in life at which young shad start to consume food; (2) What type or types of food the young shad consume at the onset of feeding; (3) Food changes, if any, which occur with age and growth in size up to the arbitrarily designated total length of two inches. The plan was that the shad larvae be introduced into an outdoor rearing pond previously fertilized, and that the larvae be dependent upon the plankton for food as they would be under natural conditions.
    Keywords: Aquaculture ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
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  • 16
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    WorldFish | Dhaka, Bangladesh
    In:  http://aquaticcommons.org/id/eprint/12702 | 115 | 2013-12-04 08:17:43 | 12702 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The Aquaculture for Income and Nutrition (AIN) project implemented by World Fish and funded by USAID, aims at increasing aquaculture production in 20 districts of Southern Bangladesh (Greater Khulna, Greater Barisal, Greater Jessore and Greater Faridpur) to reduce poverty and enhance nutritional status. As part of its initial scoping activities World Fish commissioned this value chain assessment on the market chains of carp fish seed (spawn, fry and fingerlings) in the southern region of Bangladesh. The purpose of this study is to obtain a clearer understanding of the volumes of fish produced and consumed in Southern Bangladesh and their origin (by system and location), their destination (by type of market, type of consumer and location), and to gain a clearer understanding of potential market based solutions to farmer’s problems, which the project could implement.
    Description: CGIAR Research Program Livestock and Fish
    Keywords: Aquaculture ; Aquaculture ; Nutrition ; Value chain ; Marketing ; Fishery product
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
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  • 17
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    WorldFish | Dhaka, Bangladesh
    In:  http://aquaticcommons.org/id/eprint/12700 | 115 | 2013-12-04 08:13:26 | 12700 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The Feed the Future Aquaculture project is a five year transformative investment in aquaculture focused on 20 southern districts in Barisal, Khulna and Dhaka divisions, Bangladesh. This report describes the achievements of FtF-Aquaculture project activities implemented during FY12. Some of the targets for production and associated income have not been achieved yet as a large share of the fish will be harvested after closing of the reporting period. However, on the basis of growth monitoring, indications are that production is on track to achieve the targets.
    Description: CGIAR Research Program Livestock and Fish
    Keywords: Aquaculture ; Aquaculture ; Research ; Food security ; Livelihoods
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 72
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  • 18
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    WorldFish | Dhaka, Bangladesh
    In:  http://aquaticcommons.org/id/eprint/12703 | 115 | 2013-12-03 12:57:19 | 12703 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The WorldFish Center is implementing the FtF Aquaculture Project in 20 southern districts in Bangladesh. The project is implemented under USAID’s Feed the Future initiative in collaboration with the Government of Bangladesh. The project contributes to achieving the ‘Feed the Future’ goals through four objectives: (i) dissemination of improved quality fish and shrimp seed, (ii) improving the nutrition and income status of farm households, (iii) increasing investment, employment and fish production through commercial aquaculture and (iv) policy and regulatory reform and institutional capacity building to support sustainable aquaculture growth. The project commissioned this study to gather insights into the value chains of shrimp, prawn and tilapia in the project region and the feasibility of promoting culture of brackish water sea-bass in the region. The findings and recommendations are expected to provide the foundation for the project to design its interventions for achieving its goals.
    Description: CGIAR Research Program Livestock and Fish
    Keywords: Aquaculture ; Aquaculture ; Seed (aquaculture) ; Policies ; Shrimp culture
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 82
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  • 19
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12704 | 115 | 2013-12-03 13:03:36 | 12704 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The CGIAR Research Program on Aquatic Agricultural Systems is a multi-year research initiative launched in July 2011. It is designed to pursue community-based approaches to agricultural research and development that target the poorest and most vulnerable rural households in aquatic agricultural systems. Led by WorldFish, a member of the CGIAR Consortium, the program is partnering with diverse organizations working at local, national and global levels to help achieve impacts at scale.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Agriculture ; Aquaculture ; Agriculture ; Aquaculture ; Development projects ; research
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 35
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  • 20
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    WorldFish | Zomba, Malawi
    In:  http://aquaticcommons.org/id/eprint/12705 | 115 | 2013-12-04 01:31:27 | 12705 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The WorldFish Center was tasked to undertake a study to access, collate and develop background materials to produce an internationally linked and Africa-wide perspective on sectorally relevant policy issues. The specific objective of the study was to assess and define conditions and impact pathways, in Africa or elsewhere, where markets, policies, resources and technologies have combined to promote steady and sustainable growth of aquaculture, and where have been clear direct impacts on food supply, income, employment and consumption opportunities, as well as increase in supply that has led to stabilised prices. The study was also aimed at providing guidelines for scaling up the implementation of the synthesis study via Afri-FishNet (CAADP Fish Expert Pools) at the national and regional levels.
    Description: Submitted to: The NEPAD Aquaculture Working Group, NEPAD Programme on African Fisheries. NEPAD Fish Node, Bunda College, Lilongwe
    Keywords: Aquaculture ; Sociology ; Aquaculture ; Policies ; Governance ; Africa
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 45
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  • 21
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    WorldFish | Dhaka, Bangladesh
    In:  http://aquaticcommons.org/id/eprint/12701 | 115 | 2013-12-04 08:15:49 | 12701 | WorldFish Center
    Publication Date: 2021-07-04
    Description: The Feed the Future Aquaculture project is a five year transformative investment in aquaculture focused on 20 southern districts in Barisal, Khulna and Dhaka divisions, Bangladesh, which started in October 2011. This report describes the achievements of FtF-Aquaculture project activities implemented during the 6th quarter (January to March 2013) along with cumulative progress on FtF indicators. Due to the seasonality of fish and shrimp production, which is out of sync with the project year, final harvesting of aquaculture production was completed in this quarter. The achievements summarized below relate to progress of project activities. Progress against the FtF indicators that were not reported on previously are now included in this report.
    Description: CGIAR Research Program Livestock and Fish
    Keywords: Aquaculture ; Aquaculture ; Research ; Food security ; Livelihoods
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 22
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    WorldFish | Bhubaneswar, India
    In:  http://aquaticcommons.org/id/eprint/12749 | 115 | 2013-12-03 13:46:30 | 12749 | WorldFish Center
    Publication Date: 2021-07-05
    Description: Macrobrachiurn rosenbergii is one of the widely cultured freshwater prawn species globally. India was the third largest producer of this species in 2007 and its aquaculture production rose to 43,000 metric tons (t) in 2005 froin less than 500 t in 1995. However, since then production has been declining and in 2008-09 it was 12,856 t, a reduction of more than 70% compared to 2005. There are several contributing factors to this decline, such as slow growth rate, poor survival, disease outbreaks, increase in cost of production, and availability of low risk alternative fish species. However, there is a consensus that poor seed quality leading to unsatisfactory growth and survival rates in ponds is one of the major reasons. Hence, the development of a systematic selective breeding program aimed at improving growth rate and ensuring high survival rate of this species was deemed a high priority. The Central Institute of Freshwater Aquaculture (CIFA), Bhubaneswar, India in collaboration with the WorldFish Center, Malaysia initiated a selective breeding program for this species in 2007.
    Description: CIFA - WorldFish Project on Genetic Improvement of Freshwater Prawn, Macrobrachium rosenbergii (de Man) in India (Phase Two)
    Keywords: Aquaculture ; Prawn culture ; Genetics ; Seed production ; Selective breeding ; Freshwater aquaculture ; India •Livestock and Fish
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12751 | 115 | 2013-12-03 13:58:51 | 12751 | WorldFish Center
    Publication Date: 2021-07-05
    Description: This guide was developed to document the process and activities that WorldFish staff have used and adapted as facilitators working with communities interested in marine resource management in Solomon Islands. It draws on the experiences from work conducted with FSPI and MFMR through ACIAR funded projects, with communities that had a primary interest in the management of coral reef fisheries. Since 2011 the process has been trialed and adapted further with communities interested in mangrove ecosystem management (through the MESCAL project). This guide is based on lessons about the process of a community developing, writing and implementing a management plan. This guide does not cover lessons about the outcomes of that management.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Description: Based on lessons from implementing CBRM with rural coastal communities in Solomon Islands (2005-2013)
    Keywords: Aquaculture ; Fisheries ; Ecology ; Marine resources ; Resource management ; Participatory approach ; Solomon Islands
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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  • 24
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12756 | 115 | 2013-12-04 08:34:48 | 12756 | WorldFish Center
    Publication Date: 2021-07-05
    Description: This report presents the findings of a mission to critically review the institutional, policy and regulatory framework for sustainable development of the Egyptian aquaculture sector. The study was undertaken by an International Expert on Aquaculture Policy, and a National Expert on Institutions, on behalf of the Project “Improving Employment and Income through the Development of Egypt’s Aquaculture Sector“, implemented by WorldFish and CARE, and funded by the Swiss Agency for Development and Cooperation(SDC). The objective of the mission was to assess the current status of the Egyptian aquaculture sector, in terms of the policy, legal and institutional environment, with a view to suggesting the major issues to be addressed within a future policy dialogue.
    Description: Swiss Agency for Development and Cooperation
    Description: Improving Employment and Income through the Development of Egypt’s Aquaculture Sector (IEIDEAS) Project
    Keywords: Aquaculture ; Aquaculture ; Policy ; Governance ; Aquaculture development ; Egypt
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12757 | 115 | 2013-12-04 08:29:50 | 12757 | WorldFish Center
    Publication Date: 2021-07-05
    Description: This report is a literature review on Food and Nutrition Security in Timor-Leste based on data from surveys conducted by the Timor-Leste National Statistics Directorate, as well as from national and international organizations working in Timor-Leste. This review was supported by the Australian Centre for International Agricultural Research (ACIAR)-funded project “Strategy for Investment in Fisheries in East Timor”. This report describes the current food and nutrition situation in Timor-Leste for the purpose of planning and implementing interventions aimed at improving food and nutrition security, especially within aquatic agricultural systems. The potential role of aquaculture in improving food and nutrition security is considered, with reference to the recently endorsed Timor-Leste National Aquaculture Development Strategy (2012-2030) developed by the National Directorate of Fisheries and Agriculture, Ministry of Agriculture and Fisheries.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Aquaculture ; Aquaculture ; Nutrition ; Food security ; Gender
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 15
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    WorldFish | Solomon Islands
    In:  http://aquaticcommons.org/id/eprint/12753 | 115 | 2013-12-03 14:16:27 | 12753 | WorldFish Center
    Publication Date: 2021-07-05
    Description: WorldFish is leading the CGIAR Research Program on Aquatic Agricultural Systems together with two other CGIAR Centers; the International Water Management Institute (IWMI) and Bioversity. In 2012 and 2013 the AAS Program rolled out in Solomon Islands, Zambia, Bangladesh, Cambodia and the Philippines. Aquatic Agricultural Systems are places where farming and fishing in freshwater and/or coastal ecosystems contribute significantly to household income and food security. The program goal is to improve the well-being of AAS-dependent people. A hub is a geographic location that provides a focus for learning, innovation and impact through participatory action research. In Solomon Islands AAS works in Malaita Hub (Malaita Province) and Western Hub (Western Province). In each hub we identify a ‘Development Challenge’ that the Program will address to give us focus and motivation.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Agriculture ; Aquaculture ; Aquatic Agricultural Systems ; Research ; Development projects ; Solomon Islands
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 23
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/12823 | 115 | 2016-03-01 06:59:01 | 12823 | WorldFish Center
    Publication Date: 2021-07-06
    Description: The scoping mission team was composed of 14 people representing research institutions (RUPP), government (FiA, IFReDI), NGOs (ANKO, ADIC) and CGIAR institutions (WorldFish and Bioversity). The scoping trip was carried out over a 7-day period from April 28 to May 4 within eight (8) communities in Kampong Thom, Siem Reap, Battambang, Pursat and Kampong Chhnang. In addition, panel discussions were held with local government, fishery, agriculture and water management institutions, NGOs, the private sector and communities, and were convened in Siem Reap, Battambang and Pursat. The AAS scoping team focused their enquiries on five themes, and the findings of this report are presented in sections that highlight the opportunities, challenges and knowledge gaps related to each theme. The sections have been lightly edited to maintain the style and intention of the authors. The themes are: 1) AAS production systems--fish, rice, aquaculture. 2) Livelihoods, poverty, and gender equity . 3) Value chains and markets. 4) Institutions and governance. 5) Knowledge management and partnerships.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Agriculture ; Aquaculture ; Policies ; Aquatic Agricultural Systems ; Development projects ; Research ; Aquaculture ; Fisheries ; Agriculture ; Value chains ; Livelihoods ; Governance ; Gender ; Poverty reduction ; Cambodia ; Tonle Sap L.
    Repository Name: AquaDocs
    Type: monograph
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    Format: application/pdf
    Format: 47
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    Texas Game and Fish Commission Marine Laboratory | Rockport, TX
    In:  http://aquaticcommons.org/id/eprint/14198 | 9596 | 2020-08-31 20:31:32 | 14198 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: One hundred and twenty-three samples were collected producing 3085 white shrimp and 3703 brown shrimp. Juvenile brown shrimp entered the bay in three waves in April, July, and August. Young whites entered in three waves in July, August, and September. The brown shrimp was the more abundant species. Samples produced about one-third as many brown and white shrimp as those of 1961 and about one-tenth as many as those of 1960. Temperatures followed the normal seasonal trend, except for the freeze in January, and a six degree centigrade decline in March. The reduced amount of rainfall and river flow this year resulted in the higher bay salinities than in 1960-61.
    Keywords: Aquaculture ; Fisheries ; penaeid shrimp ; Penaeus aztecus ; Penaeus setiferus ; juveniles ; population dynamics
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    Type: book_section
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    Format: application/pdf
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    Texas Game and Fish Commission Marine Laboratory | Rockport, TX
    In:  http://aquaticcommons.org/id/eprint/14207 | 9596 | 2020-08-23 22:50:08 | 14207 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: In order to obtain information on the characteristics of water and climate that prevail in Galveston Bay, East Bay, and West Bay, established stations were sampled regularly. Information derived from samples included water temperature and salinity. Additional information of this nature was derived from other bay studies. Information on river flow, air temperature and wind were derived from publications. Water temperatures were found to follow air temperatures closely. The prevailing winds in all but two months were on-shore winds. Salinities were found to vary inversely with the volume of fresh water entering the bays from the Trinity River. West Bay, due to its locations, is affected less than the other bays by fresh water from the Trinity River. Vertical and horizontal salinity gradients were found to be the normal pattern in East Bay and Galveston Bay. West Bay, with two major passes to the Gulf of Mexico and with no major source of fresh water, normally maintained higher salinities than the other bays.
    Keywords: Chemistry ; Oceanography ; GBIC ; hydrography ; meteorology ; salinity gradients ; temperature ; salinity ; water sampling
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    Format: application/pdf
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    South Central Environmental Center, NUS Corporation | Houston, TX
    In:  http://aquaticcommons.org/id/eprint/14172 | 9596 | 2020-08-31 20:26:12 | 14172 | Galveston Bay Information Collection
    Publication Date: 2021-06-24
    Description: In May 1979, Contract No. DACW64-79-C-0037, for performance of bioassays and bioaccumulation studies, chemical analyses of sediments, seawater and elutriate materials, and appropriate statistical analyses of samples obtained from the Galveston Harbor and Sabine-Neches Waterway Channels, was awarded to NUS Corporation by the Army Corps of Engineers, Galveston District. These studies are part of a continuing evaluation of the potential environmental effects of proposed ocean disposal of dredged materials and are required for compliance with provisions of Section 103 of the Marine Protection, Research and Sanctuaries Act of 1972 (PL 92-532). This final report presents the results of dredged material evaluations for the Galveston Harbor Channel project area.
    Keywords: Chemistry ; Limnology ; bioassay ; chemical analyses ; statistical analyses ; water quality
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    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 146
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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
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    Type: book_section
    Format: application/pdf
    Format: application/pdf
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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
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    Type: book_section
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    Format: application/pdf
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    In:  bill.sunda@noaa.gov | http://aquaticcommons.org/id/eprint/14910 | 403 | 2014-03-11 19:18:24 | 14910 | United States National Ocean Service
    Publication Date: 2021-06-28
    Description: Time series measurements of dimethylsulfide (DMS), particulate dimethylsulfoniopropionate (DMSPp), chlorophyll a (chl a), algal pigments, major nutrients, and the potential activity of DMSP lyase enzymes were made over a 2 yr period (6 March 2003 to 28 March 2005) near the mouth of the shallow, tidally mixed Newport River estuary, North Carolina, USA. DMSPp had a mean of 43 ± 20 nM (range = 10.5 to 141 nM, n = 85) and DMS a mean of 2.7 ± 1.2 nM (range = 0.9 to 7.0 nM). The mean DMS in Gallants Channel was not significantly different from that measured in the Sargasso Sea near Bermuda during a previous 3 yr time series study (2.4 ± 1.5 nM), despite there being a 43-fold higher mean chl a concentration (4.9 ± 2.4 µg l–1) at the coastal site. In winter, DMS was low and chl a was high in the surface waters of the Sargasso Sea, while the opposite was true at the coastal site. Consequently, DMS concentrations per unit algal chl a were on average 170 times higher in the Sargasso Sea than at the coastal site during the summer, but only 7 times higher during the winter. The much higher chl a-specific DMS concentrations at the oceanic site during the summer were linked to higher ratios of intracellular DMSP substrate and DMSP lyase enzyme per unit chl a. These differences in turn appear to be linked to large differences in nutrient concentrations and solar UV stress at the 2 sites and to associated differences in the composition of algal assemblages and physiological acclimation of algal cells.
    Keywords: Chemistry ; Ecology ; Management
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    In:  milton.levin@uconn.edu | http://aquaticcommons.org/id/eprint/14911 | 403 | 2014-03-10 20:01:03 | 14911 | United States National Ocean Service
    Publication Date: 2021-06-28
    Description: The immunotoxic potential of domoic acid (DA), a well-characterized neurotoxin, has not been fully investigated. Phagocytosis and lymphocyte proliferation were evaluated following in vitro and in vivo exposure to assay direct vs indirect effects. Mice were injected intraperitoneally with a single dose of DA (2.5 µg/g b.w.) and sampled after 12, 24, or 48 hr. In a separate experiment, leukocytes and splenocytes were exposed in vitro to 0, 1, 10, or 100 µM DA. In vivo exposure resulted in a significant increase in monocyte phagocytosis (12-hr), a significant decrease in neutrophil phagocytosis (24-hr), a significant decrease in monocyte phagocytosis (48-hr), and a significant reduction in T-cell mitogen-induced lymphocyte proliferation (24-hr). In vitro exposure significantly reduced neutrophil and monocyte phagocytosis at 1 µM. B- and T-cell mitogen-induced lymphocyte proliferation were both significantly increased at 1 and 10 µM, and significantly decreased at 100 µM. Differences between in vitro and in vivo results suggest that DA may exert its immunotoxic effects both directly and indirectly. Modulation of cytosolic calcium suggests that DA exerts its effects through ionotropic glutamate subtype surface receptors at least on monocytes. This study is the first to identify DA as an immunotoxic chemical in a mammalian species.
    Keywords: Chemistry ; Health
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    In:  alajonchere@gmail.com | http://aquaticcommons.org/id/eprint/14960 | 1545 | 2014-04-05 21:35:14 | 14960
    Publication Date: 2021-06-29
    Keywords: Aquaculture
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    In:  http://aquaticcommons.org/id/eprint/15095 | 403 | 2014-05-28 03:30:26 | 15095 | United States National Marine Fisheries Service
    Publication Date: 2021-07-02
    Description: As nearshore fish populations decline, many commercialfishermen have shifted fishing effort to deeper continental slope habitats to target fishes for which biologicalinformation is limited. One such fishery that developed in the northeastern Pacific Ocean in the early 1980s was for the blackgill rockfish (Sebastes melanostomus), a deep-dwelling (300−800 m) species that congregates over rocky pinnacles, mainly from southern California to southernOregon. Growth zone-derived age estimates from otolith thin sections were compared to ages obtained from the radioactive disequilibria of 210Pb, in relation to its parent, 226Ra, in otolith cores of blackgill rockfish. Age estimates were validated up to 41 years, and a strong pattern of agreement supported a longevity exceeding 90years. Age and length data fitted to the von Bertalanffy growth function indicated that blackgill rockfish are slow-growing (k= 0.040 females, 0.068 males) and that females grow slower than males, but reach a greater length. Age at 50% maturity, derived from previously published length-at-maturity estimates, was 17 years for males and 21 years for females. The results of this study agree with general life history traits already recognized for many Sebastes species, such as long life, slow growth, and late age at maturation. These traits may undermine the sustainability of blackgill rockfish populations when heavy fishing pressure, such as that which occurred in the 1980s, is applied.
    Keywords: Chemistry ; Fisheries ; Management
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    Format: 711-722
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    In:  http://aquaticcommons.org/id/eprint/15104 | 403 | 2014-05-28 03:41:12 | 15104 | United States National Marine Fisheries Service
    Publication Date: 2021-07-02
    Description: The Pacific threadfin (Polydactylus sexfilis) is considered one of the premier Hawaiian food fishes but even with catch limits, seasonal closures, and size limits, catches have declined dramatically since the 1960s. It was identified as the top candidate species for stock enhancement in Hawaii, based on the decline in stocks, high market value, and importance of the fishery.In the stock enhancement program for Pacific threadfin, over 430,000 fingerlings of various sizes were implanted with coded wire tags and released in nursery habitats along the windward coast of Oahu between 1993 and 1998. Because few Pacific threadfin were present in creel surveys conducted between 1994 and 1998, Oahu fishermen were offered a $10 reward for each threadfin that was caught (for both hatchery-reared and wild fish). A total of 1882 Pacific threadfin were recovered from the reward program between March 1998 and May 1999, including 163 hatchery-reared fish, an overall contribution of 8.7% to the fishery. Hatchery-reared fish accounted for as high as 71% of returns in the release areas. Hatchery-reared fish were recovered on average 11.5 km (SD=9.8 km) from the release site, although some had moved as far away as 42 km. Average age for recovered hatchery-reared fish was 495 days; the oldest was 1021 days.Cultured Pacific threadfin juveniles survived and recruited successfully to the recreational fishery, accounting for 10% of fishermen’s catches on the windward side of Oahu. Recruitment to the fishery was highest for the 1997 release year; few juveniles from earlier releases were observed. Presence of a few large, fully developed females in the recreational fishery suggested that hatchery-reared fish can survive, grow, and reproductively contribute to the population. Implementation of an enhancement program that is focused on juveniles and perhaps large females, as part of an integrated fishery management strategy, could speed the recovery of this fish population.
    Keywords: Aquaculture ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15137 | 403 | 2014-05-23 00:06:17 | 15137 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Keywords: Chemistry ; Fisheries
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    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
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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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    Format: application/pdf
    Format: 457-459
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    In:  http://aquaticcommons.org/id/eprint/15161 | 403 | 2014-05-29 07:19:00 | 15161 | United States National Marine Fisheries Service
    Publication Date: 2021-07-03
    Description: The use of strontium-to-calcium (Sr/Ca) ratios in otoliths is becoming a standard method to describe life history type and the chronology of migrations between freshwater and seawater habitats in teleosts (e.g. Kalish, 1990; Radtke et al., 1990; Secor, 1992; Rieman et al., 1994; Radtke, 1995; Limburg, 1995; Tzeng et al. 1997; Volk et al., 2000; Zimmerman, 2000; Zimmerman and Reeves, 2000, 2002). This method provides critical information concerning the relationship and ecology of species exhibiting phenotypic variation in migratory behavior (Kalish, 1990; Secor, 1999).Methods and procedures, however, vary among laboratories because a standard method or protocol for measurement ofSr in otoliths does not exist. In this note, we examine the variations in analytical conditions in an effort to increase precision of Sr/Ca measurements. From these findings we argue that precision can be maximized withhigher beam current (although there is specimen damage) than previously recommended by Gunn et al. (1992).
    Keywords: Chemistry ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15180 | 403 | 2014-05-29 07:50:04 | 15180 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Keywords: Chemistry ; Fisheries
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    Type: article , TRUE
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  • 42
    Publication Date: 2021-07-04
    Keywords: Biology ; Chemistry ; Fisheries ; Management
    Repository Name: AquaDocs
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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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    In:  http://aquaticcommons.org/id/eprint/15195 | 403 | 2014-05-30 07:14:43 | 15195 | United States National Marine Fisheries Service
    Publication Date: 2021-07-04
    Description: Skeletochronological data on growth changes in humerus diameter were used to estimate the age of Hawaiian green seaturtles ranging from 28.7 to 96.0 cm straight carapace length. Two age estimation methods, correction factor and spline integration, were compared, giving age estimates ranging from 4.1 to 34.6 and from 3.3 to 49.4 yr, respectively, for the sample data. Mean growth rates of Hawaiian green seaturtles are 4–5 cm/yr in early juveniles, decline to a relatively constant rate of about 2 cm/yr by age 10 yr, then decline again to less than 1 cm/yr as turtles near age 30 yr. On average, age estimates from the two techniques differed by just a few years for juvenile turtles, but by wider margins for mature turtles. The spline-integration method models the curvilinear relationship between humerus diameter and the width of periosteal growth increments within the humerus, and offers several advantages over the correction-factor approach.
    Keywords: Biology ; Chemistry ; Fisheries
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    Format: application/pdf
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  • 45
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    In:  http://aquaticcommons.org/id/eprint/15230 | 403 | 2014-06-01 18:56:50 | 15230 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: Independent molecular markers based on mitochondrial and nuclear DNA were developed to provide positive identification of istiophorid and xiphiid billfishes (marlins, spearfishes, sailfish, and swordfish). Both classes of markers were based on amplification of short segments (〈1.7 kb) of DNA by the polymerase chain reaction and subsequent digestion with informative restriction endonucleases. Candidate markers were evaluated for their ability to discriminate among the different species and the level of intraspecific variation they exhibited. The selected markers require no more than two restriction digestions to allow unambiguous identification, although it was not possible to distinguish between white marlin and striped marlin with any of the genetic characters screened in our study. Individuals collected from throughout each species’ range were surveyed with the selected markers demonstrating low levels of intraspecific character variation within species. The resulting keys provide two independent means for the forensic identification of fillets and for specific identification of early life history stages.
    Keywords: Biology ; Chemistry ; Fisheries ; Management
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    Format: application/pdf
    Format: 537-544
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  • 46
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    In:  http://aquaticcommons.org/id/eprint/15228 | 403 | 2014-06-01 18:57:37 | 15228 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: Catch rates in the South African rock lobster (Jasus lalandii) fishery declined after 1989 in response to reduced adult somatic growth rates and a consequent reduction in recruitment to the fishable population. Although spatial and temporal trends in adult growth are well described, little is known about how juvenile growth rates have been affected. In our study, growth rates of juvenile rock lobster on Cape Town harbor wall were compared with those recorded at the same site more than 25 years prior to our study, and with those on a nearby natural nursery reef. We found that indices of somatic growth measured during 1996–97 at the harbor wall had declined significantly since 1971–72. Furthermore, growth was slower among juvenile J. lalandii at the harbor wall than those at the natural nursery reef. These results suggest that growth rates of juvenile and adult J. lalandii exhibit similar types of spatiotemporal patterns. Thus, the recent coastwide decline in adult somatic growth rates might also encompass smaller size classes.
    Keywords: Biology ; Chemistry ; Fisheries
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/15236 | 403 | 2014-06-01 18:54:03 | 15236 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: Loggerhead sea turtles (Caretta caretta) are migratory, long-lived, and slow maturing. They are difficult to study because they are seen rarely and their habitats range over vast stretches of the ocean. Movements of immature turtles between pelagic and coastal developmental habitats are particularly difficult to investigate because of inadequate tagging technologies and the difficulty in capturing significant numbers of turtles at sea. However, genetic markers found in mitochondrial DNA (mtDNA) provide a basis for predicting the origin of juvenile turtles in developmental habitats. Mixed stock analysis was used to determine which nesting populations were contributing individuals to a foraging aggregation of immature loggerhead turtles (mean 63.3 cm straight carapace length [SCL]) captured in coastal waters off Hutchinson Island, Florida. The results indicated that at least three different western Atlantic loggerhead sea turtle subpopulations contribute to this group: south Florida (69%), Mexico (20%), and northeast Florida-North Carolina (10%). The conservation and management of these immature sea turtles is complicated by their multinational genetic demographics.
    Keywords: Biology ; Chemistry ; Fisheries ; Management
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    In:  http://aquaticcommons.org/id/eprint/15248 | 403 | 2014-05-30 21:15:27 | 15248 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: We used allozyme, microsatellite, and mitochondrial DNA (mtDNA) data to test for spatial and interannual genetic diversity in wall-eye pollock (Theragra chalcogramma) from six spawning aggregations representing three geographic regions: Gulf of Alaska, eastern Bering Sea, and eastern Kamchatka. Interpopulation genetic diversity was evident primarily from the mtDNA and two allozyme loci (SOD-2*, MPI*). Permutation tests ˆindicated that FST values for most allozyme and microsatellite loci were not significantly greater than zero. The microsatellite results suggested that high locus polymorphism may not be a reliable indicator of power for detecting population differentiation in walleye pollock. The fact that mtDNA revealed population structure and most nuclear loci did not suggests that the effective size of most walleye pollock populations is large (genetic drift is weak) and migration is a relatively strong homogenizing force. The allozymes and mtDNA provided mostly concordant estimates of patterns of spatial genetic variation. These data showed significant genetic variation between North American and Asian populations. In addition, two spawning aggregations in the Gulf of Alaska, in Prince William Sound, and off Middleton Island, appeared genetically distinct from walleye pollock spawning in the Shelikof Strait and may merit management as a distinct stock. Finally, we found evidence of interannual genetic variation in two of three North American spawning aggregations, similar in magnitude to the spatial variation among North American walleye pol-lock. We suggest that interannual genetic variation in walleye pollock may be indicative of one or more of the following factors: highly variable reproductive success, adult philopatry, source-sink metapopulation structure, and intraannual variation (days) in spawning timing among genetically distinct but spatially identical spawning aggregates.
    Keywords: Biology ; Chemistry ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15239 | 403 | 2014-06-01 18:52:47 | 15239 | United States National Marine Fisheries Service
    Publication Date: 2021-07-05
    Description: Intergeneric hybridization between the epinepheline serranids Cephalopholis fulva and Paranthias furcifer in waters off Bermuda was investigated by using morphological and molecular characters. Putative hybrids, as well as members of each presumed parent species, were analyzed for 44 morphological characters and screened for genetic variation at 16 nuclear allozyme loci, two nuclear (n)DNA loci, and three mitochondrial (mt)DNA gene regions. Four of 16 allozyme loci, creatine kinase (CK-B*), fumarase (FH*), isocitrate dehydrogenase (ICDH-S*), and lactate dehydrogenase (LDH-B*), were unique in C. fulva and P. furcifer. Restriction fragments of two nuclear DNA intron regions, an actin gene intron and the second intron in the S7 ribosomal protein gene, also exhibited consistent differences between the two presumed parent species. Restriction fragments of three mtDNA regions—ND4, ATPase 6, and 12S/16S ribosomal RNA—were analyzed to identify maternal parentage of putative hybrids. Both morphological data and nuclear genetic data were found to be consistent with the hypothesis that the putative hybrids were the result of interbreeding between C. fulva and P. furcifer. Mean values of 38 morphological characters were different between presumed parent species, and putative hybrids were intermediate to presumed parent species for 33 of these characters. A principal component analysis of the morphological and meristic data was also consistent with hybridization between C. fulva and P. furcifer. Thirteen of 15 putative hybrids were heterozygous at all diagnostic nuclear loci, consistent with F1 hybrids. Two putative hybrids were identified as post-F1 hybrids based on homozygosity at one nuclear locus each. Mitochondrial DNA analysis showed that the maternal parent of all putative hybrid individuals was C. fulva. A survey of nuclear and mitochondrial loci of 57 C. fulva and 37 P. furcifer from Bermuda revealed no evidence of introgression between the parent species mediated by hybridization.
    Keywords: Biology ; Chemistry ; Fisheries
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    In:  http://aquaticcommons.org/id/eprint/15349 | 9513 | 2014-09-19 15:10:35 | 15349
    Publication Date: 2021-07-06
    Description: Investigation on the species composition and abundance of zooplankton in Ogun River, Abeokuta, Ogun state, Southwestern Nigeria was carried out for a period of seven months (December, 2011-June, 2012), Using hand trawling method, 55 µm mesh size plankton net was trawled horizontally ten times to capture zooplankton. The zooplankton samples were put into properly labeled plastic containers and preserved in 4% formalin solution. A total of sixteen genera from five taxonomic groups were recorded from Ogun River. Cladocera predominated both in terms of species composition and abundance. Five species of Cladocera was recorded consisting of 31.25%. Protozoa and Rotifera recorded four species each consisting of 25%. Copepoda recorded two species consisting of 12.5%, and Ostracoda with one species consisting of 6.25%. The low nature of zooplankton abundance and species composition observed in this study must have been caused by the polluted nature of the water due to the anthropogenic activities carried out around its shores The dominance of Cladocera in this river is similar to findings from River Echara and River Imo, Southeastern Nigeria.
    Keywords: Aquaculture ; Ecology ; Environment ; Fisheries ; Limnology ; Management ; Pollution
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    In:  http://aquaticcommons.org/id/eprint/15351 | 9513 | 2014-09-19 15:29:26 | 15351
    Publication Date: 2021-07-06
    Description: The aim of this study was to investigate the monthly spatial occurrence of phytoplankton and zooplankton in River Ogun, Abeokuta, Southwest Nigeria. This was carried out for seven months between December, 2011 and June, 2012 in 4 stations. A total of 41 species of phytoplankton and 16 zooplankton species from 5 classes respectively were recorded. Zooplankton was dominated by Cladocera throughout the study period while phytoplankton was dominated by blue green algae (Cyanophyta or Cyanobacteria). The dominance of Cyanophyta in this river is similar to findings by Sekadende and co-workers, Ogato, Deng and co-worker, and Shakila and co-worker. The dominance of Cladocera in this river is similar to findings by Ude and co-workers, and Ogbuagu and co-worker.
    Keywords: Aquaculture ; Ecology ; Environment ; Fisheries ; Limnology ; Management ; Pollution
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    In:  http://aquaticcommons.org/id/eprint/15348 | 9513 | 2014-09-19 15:11:35 | 15348
    Publication Date: 2021-07-06
    Description: The phytoplankton species composition and abundance in Ogun River, Ogun state, Southwest Nigeria was studied for a period of seven months (December, 2011 - June, 2012), a total of forty-one genera belonging to five taxonomic groups were recorded from Ogun River. The phytoplankton species composition was surpassed by Chrysophyta with 15 species consisting of 36.6% followed by Chlorophyta with 14 consisting of 34.1%. This was followed by Cyanophyta (7 species) consisting of 17.1%, Euglenophyta with 3 species consisting of 7.3% and Pyrrophyta with 2 species consisting 4.92%. Cyanophyta was the highest in abundance consisting of 41% while the lowest in abundance was Pyrrophyta consisting of 1.5%. The low nature of phytoplankton abundance and diversity observed in this study must have been caused by the polluted nature of the water due to the anthropogenic activities carried out around its shores The dominance of Cyanophyta in this river is similar to findings from Lake Victoria, Lake Bishoftu, Lake Chaohu and the temple pond of Thirupour.
    Keywords: Aquaculture ; Ecology ; Environment ; Fisheries ; Limnology ; Management ; Pollution
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    In:  http://aquaticcommons.org/id/eprint/15350 | 9513 | 2014-09-19 15:17:44 | 15350
    Publication Date: 2021-07-06
    Description: This study assessed the physico-chemical quality of River Ogun, Abeokuta, Ogun state, Southwestern Nigeria. Four locations were chosen spatially along the water course to reflect a consideration of all possible human activities that are capable of changing the quality of river water. The water samples were collected monthly for seven consecutive months (December 2011 – June 2012) at the four sampling stations. pH, air temperature (℃), water temperature (℃), conductivity (µs/cm) and total dissolved solids (mg/L) were conducted in-situ with the use of HANNA Combo pH and EC multi meter Hi 98129 and Mercury-in-glass thermometer while dissolved oxygen (mg/L), nitrate (mg/L), phosphate (mg/L), alkalinity (mg/L) and hardness (mg/L) were determined ex-situ using standard methods. Results showed that dissolved oxygen, hydrogen ion concentration, total hardness and nitrate were above the maximum permissible limit of National Administration for Food, Drugs and Control (NAFDAC), Standard Organization of Nigeria (SON), Federal Environmental Protection Agency (FEPA), United States Environmental Protection Agency (USEPA), European Union (EU) and World Health Organization (WHO) for drinking water during certain months of the study period. Results also showed that water temperature and conductivity were within the permissible limits of all the standards excluding FEPA. However, total dissolved solids and alkalinity were within the permissible limits of all the standards. Adejuwon and Adelakun, (2012) also reported similar findings on Rivers Lala, Yobo and Agodo in Ewekoro local government area of Ogun state, Nigeria. Since most of the parameters measured were above the maximum permissible limits of the national and international standards, it can be concluded that the water is unfit for domestic uses, drinking and aquacultural purposes and therefore needs to be treated if it is to be used at all. The low dissolved oxygen values for the first four months was too low i.e. 〈 5 mg/L. This is most likely as a result of the amount of effluents discharged into the river. To prevent mass extinction of aquatic organisms due to anoxic conditions, proper regulations should be implemented to reduce the organic load the river receives.
    Keywords: Chemistry ; Environment ; Health ; Management ; Pollution
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    International Center for Living Aquatic Resources Management | Zomba, Malawi
    In:  http://aquaticcommons.org/id/eprint/15366 | 6 | 2014-09-23 07:01:31 | 15366 | WorldFish Center
    Publication Date: 2021-07-06
    Keywords: Agriculture ; Aquaculture
    Repository Name: AquaDocs
    Type: monograph
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    International Center for Living Aquatic Resources Management | Zomba, Malawi
    In:  http://aquaticcommons.org/id/eprint/15365 | 6 | 2014-09-23 07:00:17 | 15365 | WorldFish Center
    Publication Date: 2021-07-06
    Description: A realistic alternative to traditional technology development and transfer has been utilized by the International Center for Living Aquatic Resources Management (ICLARM) to integrate pond fish culture into low-input farming systems in Malawi. Resource mapping was used to assess farm resources and constraints and introduce the concept of integrated resource management (IRM), the synergistic movement of resources between and among farm andhousehold enterprises. Farmer-led IRM research projects are conducted on-farm and monitored by researchers through direct observation and on-station simulation of constraints and management practices. Technology-adoption rates by farmers involved in a pilot activity was 65% compared to 0% by farmers exposed only to top-down extension approaches. Within two years of adoption, every participating farmer had transferred the technology to an average of four other farmers without the involvement of the extension services.
    Description: ICLARM African Aquaculture Project
    Keywords: Agriculture ; Aquaculture
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    Type: monograph
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    Pacific Regional Environment Programme (SPREP) | Apia, Samoa
    In:  irc@sprep.org | http://aquaticcommons.org/id/eprint/15369 | 11964 | 2014-09-25 11:47:56 | 15369 | Secretariat of the Pacific Regional Environment Programme (SPREP)
    Publication Date: 2021-07-06
    Description: BIORAP
    Description: BEM
    Description: Hard copies are also available from: irc@sprep.org
    Keywords: Aquaculture ; Conservation ; Earth Sciences ; Ecology ; Environment ; Oceanography ; rapid biodiversity assessment ; pacific ; terrestrial ; marine ; guidelines ; natural resources conservation area ; oceania ; sprep ; 2014 ; Pacific Regional Environment Programme (SPREP) ; Wildlands
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    Type: monograph
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    International Center for Living Aquatic Resources Management | Zomba, Malawi
    In:  http://aquaticcommons.org/id/eprint/15367 | 6 | 2014-09-23 07:02:03 | 15367 | WorldFish Center
    Publication Date: 2021-07-06
    Description: ICLARM introduced integrated aquaculture-agriculture (IAA) in Sakata, Malawi three years ago. Since that time, and without extension support, the number of farmers with ponds increased from 4 in 1993/94 to 12 in 1995/96. To learn why and how IAA is spreading, a study of impact and adoption was conducted in the 1995/96 production season. Interviews were conducted with farmers to discuss lAA and collect data on farm function through the use of bioresource flow diagrams. Motivations given by farmers as to why they adopted IAA were to improve household nutrition and income. Constraints to adoption identified by farmers were availability of labor and capital to purchase inputs
    Description: Southern African Development Community
    Keywords: Agriculture ; Aquaculture
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    Type: monograph
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15596 | 115 | 2014-11-19 08:49:14 | 15596 | WorldFish Center
    Publication Date: 2021-07-08
    Description: Lake Victoria fisheries face severe environmental stresses. Stocks are declining in a context of increasing population and growing demand for the lake’s resources. Rising competition between users is putting conservation goals and rural livelihoods at risk. While Uganda’s co-management policy framework is well-developed, key resources for implementation are lacking, enforcement is poor, and the relations between stakeholders are unequal. Poor rural resource users face significant challenges to effectively participate in fisheries decision-making. This case study demonstrates the progress that can be made using a collaborative approach to catalyze community-led actions linking public health, sanitation and environmental conservation in difficult circumstances, even over a relatively short time period. Multistakeholder dialogue can bring to light the sources of conflict, pinpoint governance challenges, and identify opportunities for institutional collaboration to address community needs. At the same time, the process can help build trust, confidence in collective action and public accountability.
    Description: Collaborating for Resilience
    Keywords: Agriculture ; Aquaculture ; Accountability ; Aquatic Agricultural Systems ; Aquatic resources ; Capacity development ; Co-management ; Conservation ; Environmental protection ; Equity ; Fisheries management ; Fresh water ; Governance ; Health ; Human rights ; Livelihoods ; Monitoring and evaluation ; Natural resource management ; Participatory action research ; Partnerships ; Policy ; Research ; Resilience ; Vulnerability ; Uganda ; Africa
    Repository Name: AquaDocs
    Type: monograph
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    CGIAR Research Program on Aquatic Agricultural Systems | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15603 | 115 | 2014-11-19 10:09:58 | 15603 | WorldFish Center
    Publication Date: 2021-07-08
    Description: Solomon Islands has a population of just over half a million people, most of whom are rural-based subsistence farmers and fishers who rely heavily on fish as their main animal-source food and for income. The nation is one of the Pacific Island Counties and Territories; future shortfalls in fish production are projected to be serious, and government policy identifies inland aquaculture development as one of the options to meet future demand for fish. In Solomon Islands, inland aquaculture has also been identified as a way to improve ood and nutrition security for people with poor access to marine fish. This report undertaken by a Worldfish study under the CGIAR Research Program on Aquatic Agricultural Systems explores the e potential role of land-based aquaculture of Mozambique tilapia in Solomon Islands as it relates to household food and nutrition security. This nutrition survey aimed to benchmark the foods and diets of households newly involved in small homestead tilapia ponds and their neighboring households in the central region of Malaita, the most populous island of all the provinces in Solomon Islands. Focus group discussions and semistructured interviews were employed in 10 communities (five inland and five coastal), four clinics, and five schools.
    Keywords: Agriculture ; Aquaculture ; Aquatic Agricultural Systems ; Livelihoods ; Food security ; Nutrition ; Small-scale aquaculture ; Surveys ; Tilapia ; Pacific ; Solomon Islands
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    Type: monograph
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/15601 | 115 | 2014-11-19 10:05:09 | 15601 | WorldFish Center
    Publication Date: 2021-07-08
    Description: This study provides an overview of the aquaculture sector in Ghana. It assesses the actual and potential contribution of aquaculture to poverty reduction and food security, and identifies enabling conditions for and drivers of the development of Ghana’s aquaculture sector. The study uses data collected from a variety of primary and secondary sources, including key informant interviews with actors within the aquaculture sector and relevant secondary literature.
    Keywords: Agriculture ; Aquaculture ; Food security ; Poverty reduction ; Small-scale farmers ; Small-scale fisheries ; Small-scale aquaculture ; Research ; Africa ; Ghana
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    Type: monograph
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    In:  http://aquaticcommons.org/id/eprint/16164 | 12051 | 2015-02-08 09:56:08 | 16164 | Society of Fisheries Technologists, India
    Publication Date: 2021-06-29
    Description: During the course of experimentations on the inducement of breeding in Macrobrachium rosenbergii (De Man) under laboratory conditions, detailed observations on the mating behaviour of the species have been made, which have been elaborated in this account. Various behaviour patterns have been analysed critically and the probable directive and releasive factors for these behaviour patterns discussed. Differences in behaviour of the male resulting from the introduction of another mature male in the arena have been described. An aberrant displacement activity which has been observed in one of the males has also been discussed.
    Keywords: Aquaculture ; Macrobrachium rosenbergii ; induced breeding ; freshwater crustaceans ; reproductive behaviour ; India
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    In:  http://aquaticcommons.org/id/eprint/16179 | 12051 | 2015-02-09 07:35:49 | 16179 | Society of Fisheries Technologists, India
    Publication Date: 2021-06-30
    Description: The object of this study was to determine the value of physical, bacteriological and chemical tests used to find out and compare the indices of quality of prawns stored at 0°C and at 18°C. pH value, nature of drip, the total bacterial count, presence or absence of tryptophan, trimethylamine content, glycogen, lactic acid, vitamins such as thiamin, riboflavin and niacin were estimated periodically to evaluate the quality of prawns stored at 0°C, whereas in addition to organoleptic changes, pH, bacterial count, nature of growth in peptone water, soluble protein in salt solution and loss of moisture, glycogen, lactic acid, and changes in vitamin B contents were noted periodically for prawns stored at -l8°C. Riboflavin and niacin were not affected appreciably but the retention of thiamin in prawns was very low.
    Keywords: Chemistry ; Fisheries ; chemical properties ; quality control ; Penaeus indicus ; processing fishery products ; cold storage ; storage effects
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    In:  http://aquaticcommons.org/id/eprint/16190 | 12051 | 2015-02-10 07:56:55 | 16190 | Society of Fisheries Technologists, India
    Publication Date: 2021-06-30
    Description: Fresh Bombay ducks and Bombay ducks dried (a) without any pre-treatment or (b) after brining with NaCl solutions of 15% and 7.5% concentrations for 18 hours were analyzed for moisture, ash, minerals, vitamins, fat, free fatty acids, peroxide value, thiobarbituric acid value, total protein, total amino nitrogen, soluble proteins and trimethylamine contents. All the dried samples were stored in (a) tightly closed tin containers or (b) polythene bags and analyzed for the above mentioned constituents every 1½ months. It was observed that brining did not exercise any marked influence on keeping properties. Organoleptic observations showed that fish stored in tin containers kept better and longer than those stored in polythene bags.
    Keywords: Biology ; Chemistry ; chemical composition ; Harpodon nehereus ; Bombay ducks ; nutritive value ; storage methods
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    In:  http://aquaticcommons.org/id/eprint/16379 | 12051 | 2015-03-27 09:56:06 | 16379 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: The success of breeding of common carp (Cyprinus carpio) using hormonal inducement and environmental stimuli was evaluated considering different sex ratios, and natural and artificial substrates. A total of 18 females (weighing 250 to 2200g) divided into 6 treatments were investigated. A successful spawning was observed in all the treatment groups, only. 66.66% female responded successfully to LHRH-A combined with dompheridone and 83.33% female in natural stimuli. Females induced with LHRH-A and dompheridone found prompt ovulation than that of natural stimulation. A significant variation (F=7.45, P〈0.05) was found among the different treatment groups. The number of eggs released appear to depend on body weight (t=15.72, P〈0.05), sex ratio (t=7.96, P〈0.05) and percentage of ovulated females (t=5.34, P〈0.05). Although environmentally stimulated females released more eggs than injected female (t=5.18, P〈0.05) but their survival rate was similar (t=1.77, P〈0.05). Comparison between the two approaches under the conditions of AIT hatchery shown that both are suitable for spawning induction in common carp. However, environmental stimulation is advantageous because of the less labor and lower cost required for ovulation.
    Keywords: Aquaculture ; common carps ; Cyprinus carpio ; hormones
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    In:  http://aquaticcommons.org/id/eprint/16393 | 12051 | 2015-03-27 09:58:51 | 16393 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Human ingenuity has made it possible to advent the chromosome manipulation techniques to produce individuals with differing genomic status in a number of fish using various causal agents such as physical shocks (temperature or hydrostatic pressure), chemical (endomitotics) and anesthetic treatments either to suppress the second meiotic division shortly after fertilization of eggs or to prevent the first mitotic division shortly prior to mitotic cleavage formation. This results in the induction of polyploidy (triploidy and tetraploidy), gynogenesis (both meiotic and mitotic leading to clonal lines) and androgenesis in fish population. The rationale for the induction of such ploidy in fish has been its potential for generating sterile individuals, rapidly inbred lines and masculinized fish, which could be of benefit to fish farming and aquaculture. In this paper, these are critically reviewed and the implication of recently developed chromosome manipulation techniques to various fin fishes is discussed.
    Keywords: Aquaculture ; clones ; cell division ; chromosomes ; fish eggs ; hybrid culture ; polyploidy ; gynogenesis ; androgenesis ; reproduction ; biotechnology
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    In:  http://aquaticcommons.org/id/eprint/16382 | 12051 | 2015-03-27 10:07:19 | 16382 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Nitrogen and phosphorus requirements of a chain-forming diatom, Skeletonema costatum (Greville) Cleve, collected from Yatsushiro Sea, Japan, were investigated in a laboratory culture experiment. Sodium nitrate and sodium glycerophosphate were used as nitrogen and phosphorus sources, respectively. Cultures were grown in modified Provasoli's ASP2NTA medium (Provasoli et al. 1957) at 25±1°C, light intensity 60 µE mˉ² secˉ¹ and photoperiod 12:12-h, L:D cycle. Optimum growth was observed at nitrate concentrations of 3-10 mglˉ¹ and phosphate concentrations of 1.5-15 mglˉ¹. Adequate growth was also found at the nitrate concentration of up to as high as 300 mglˉ¹. Significantly poorer growth was found at lower nitrate (〈3.0 mglˉ¹) and higher phosphate (〉15 mglˉ¹) concentrations. From the present study, it is concluded that S. costatum can grow well at wide ranges of nitrate concentrations but is sensitive to higher phosphate concentrations.
    Keywords: Aquaculture ; marine algae ; diatom ; Skeletonema costatum ; nitrogen ; phosphorus ; growth rate
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    In:  http://aquaticcommons.org/id/eprint/16386 | 12051 | 2015-03-27 09:40:56 | 16386 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-02
    Description: Artemia cysts (of GSL, Utah, USA origin) were produced from the modified traditional solar salt works of Bangladesh during winter months through different feeding/fertilization treatments (T1, T2, T3, T4 ) were analyzed to understand the effects of treatments on their fatty acid profile. Palmitic, Linolenic, Eicosapantaenonic and Docohexaenoic acids (mg/g. DW) were found highest for the cysts in T1 (16.0% ±1 .36), T2 (14.7% ±0.47), T3 (4.7% ±0.40) and T4 (0.7% ±0.06) treatments, respectively. High amount of 18:3(n-3) acids in the cysts of all sources proves to be freshwater type of the cysts. The presence of marine type essential fatty acids in the cysts of all sources were found low for 20:5n-3 (3.7-4.7%) and very low for 22:6n-3 (0.09-0.7%). No significant variation was observed for 16:0 acids within the treatments, but for 18:3(n-3) acid, the variation was found highly significant (P= 0.0052) between T2 and T4 treatments. For 20:5(n-3), only variation between T2 and T4 was found insignificant (P=0.1161), but between other treatments, significant variation was observed between T2 and T4 (P=0.0241), T2 and T4 (P=0.0022) and T1 andT4 (P=0.0161). No significant variation was found in other treatments.
    Keywords: Aquaculture ; Artemia ; HUFA ; cysts ; EFA
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    In:  http://aquaticcommons.org/id/eprint/16385 | 12051 | 2015-03-27 10:05:32 | 16385 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-06-25
    Description: A laboratory trial was conducted to determine the optimum dietary protein to energy (P/E) ratio of African catfish, Clarias gariepinus. The experiment was carried out in a flow-through system for 6 weeks. There were 12 treatments each with two replicates having 10 fish each with a mean initial weight of 1.80 ± 0.02g. Twelve semi-purified diets were formulated with four digestible crude protein levels (23, 26.5, 30 and 33.5%) and three digestible energy levels (2.25, 2.75 and 3.25 Kcal/g). The fish were fed three times daily at satiation level. The results of the study showed that, diet containing 33.5% digestible protein and 2.75 kcal/g digestible energy with a protein to energy ratio of 121 .8 (mg protein/kcal) appeared to be best utilized for growth.
    Keywords: Aquaculture ; catfishes ; Clarias gariepinus ; protein ratio ; energy ratio ; diets ; feed
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    In:  http://aquaticcommons.org/id/eprint/16380 | 12051 | 2015-03-27 10:00:08 | 16380 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Culture of gulsha (Mystus cavasius) with rajpunti (Puntius gonionotus) and silver carp ( Hypophthalmichthys molitrix) was undertaken to assess the growth and production potential of these species under polyculture system. Fingerlings of gulsha, rajpunti and silver carp were stocked at a density of 18.000, 10.000 and 4.000/ha respectively. Two treatments were tested in this experiment. Treatment-I was conducted with rice bran and mustard oil cake and treatment-II with rice bran and duck weed. All the ponds were fertilized with urea and TSP at fortnightly intervals. After six months' rearing, the gross production was estimated to be 3,582 and 3,125 kg/ha from treatment-I and treatment-II respectively. Total yield showed non-significant differences (P〉0.05) between the treatments.
    Keywords: Aquaculture ; polyculture ; Mystus cavasius ; Puntius gonionotus ; Hypophthalmichthys molitrix
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 9-14
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    In:  http://aquaticcommons.org/id/eprint/16392 | 12051 | 2015-03-27 10:03:07 | 16392 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: This study examines the relative profitability of rice-fish culture and rice mono-crop production at Gouripur thana of Mymensingh district. The results of the study show that the rice-fish farming was economically more rewarding than the rice mono-crop farming, although both the farming activities were found profitable over cash as well as full costs. In addition to extra earnings from fish, the rice-fish farming produced significantly a higher yield of rice requiring very minimum extra cost for fish. Rice-fish farming also reduced variability in yield of and return from rice.
    Keywords: Aquaculture ; rice fields ; rice field aquaculture ; production cost ; economic analysis ; agropisciculture ; fish culture ; aquaculture systems ; Gouripur ; Mymensingh ; Bangraldesh
    Repository Name: AquaDocs
    Type: article
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    Format: application/pdf
    Format: 91-98
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    In:  http://aquaticcommons.org/id/eprint/16401 | 12051 | 2015-03-27 09:58:22 | 16401 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Total bacterial load in the haemolymph of freshwater prawn Macrobrachium rosenbergii varied from 6.2x10⁴ to 1.9x10⁷ CFU/ml whereas in the hepatopancreas, bacterial load varied from 1.9x10³ to 2.9x10⁵ CFU/g. The total bacterial load in the pond water varied from 2.6x10² to 4.1x10⁵ CFU/ml. The isolated bacterial genera in the haemolymph and the hepatopancreas of prawn were Streptococcus, Acinetobacter, Micrococcus, Aeromonas, Vibrio, Flavobacterium, Staphylococcus and Pseudomonas, whereas the detected bacterial genera in pond water were Micrococcus, Streptococcus, Vibrio, Flavobacterium, Staphylococcus, Pseudomonas and Aeromonas. Among the detected genera, Vibrio and Staphylococcus were found to be dominant genera in the haemolymph of the sampled prawn throughout the study period whereas Staphylococcus and Pseudomonas were dominant in pond water.
    Keywords: Aquaculture ; pathogenic bacteria ; haemolymph ; prawn culture ; hepatopancreas ; bacteriology ; Macrobrachium rosenbergii
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    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 171-175
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    In:  http://aquaticcommons.org/id/eprint/16407 | 12051 | 2015-03-27 09:40:26 | 16407 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Effect of two supplementary feed (food A and food B) on the growth of shinghi, Heteropneustes fossilis was observed for 3 months period during winter and summer. Food B containing rice bran 2 g, wheat bran 2 g and blood 10 ml, showed better growth. The net gain in length was 70.04 mm and in weight was 13.82 g. Total net production was observed as 254.00 g/m² with feed A and 345.50 g/m² with feed B.
    Keywords: Aquaculture ; diets ; growth ; artificial feeding ; fish culture ; Heteropneustes fossilis
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    Type: article
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16406 | 12051 | 2015-03-27 10:03:38 | 16406 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: Observations were made on the seasonal variation in the occurrence of some zooplankton in a fish pond. A total of 31 genera were recorded, out of these, 8 belongs to Rotifera, 5 to Copepoda, 112 to Cladocera, 3 to Protozoa, 2 to Nematoda and 1 to Oligochaeta. The role of temperature, dissolved oxygen, free Co2, pH, turbidity and alkalinity in the occurrence of different genera is discussed.
    Keywords: Aquaculture ; physicochemical properties ; zooplankton ; water quality ; fish ponds ; seasonal variation
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    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 201-203
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    In:  http://aquaticcommons.org/id/eprint/16414 | 12051 | 2015-05-09 19:46:59 | 16414 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-04
    Description: A culture experiment of mud crab for 84 days was conducted in earthen pond at Brackishwater Station, Bangladesh Fisheries Research Institute, Paikgacha, Khulna. The aim of the experiment was to study the effects of cowdung application on crab production and water quality. There were three treatments as without cowdung (T1), 500 kg cowdung/ha/fortnight (T2) and 750 kg cowdung/ha/fortnight (T3) with three replicates for each. The result was evaluated on the basis of growth, production, survival rate etc. The experimental months were mid-April '96 to mid-July '96. To maintain a good water quality, water was exchanged in every spring tide. The range of salinity during the experiment was 8-19 ppt. Trash fish and fresh shrimp head were used as feed on raw basis in every alternate week at a rate of 8% body weight of crab at the same time rice bran and wheat flour were used at a rate of 2% body weight as a source of carbohydrate. The production of T1, T2 and T3, were 720.35 kg, 862.16 kg and 669.19 kg/ha respectively. Though the effects of cowdung on production of crab is insignificant but in terms of production, survival rate and growth, the study suggest that the application of cowdung in addition to feed can be recommended for mud crab culture at a rate of 500 kg/ha/fortnight.
    Keywords: Aquaculture ; fertilizers ; manure ; shellfish culture ; pond culture ; pellet feeds ; water quality ; brackishwater aquaculture ; Scylla serrata
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    Type: article
    Format: application/pdf
    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16432 | 12051 | 2015-03-27 09:24:40 | 16432 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-05
    Description: A three month long experiment was conducted to observe the effect of stocking density on the growth of Pangasius sutchi in net cages. The size of each cage was 1m³.The three stocking densities used were 40, 50 and 60 fishes/m³ and designated as treatment T1, T2 and T3 respectively. Each treatment had three replicates. All the fishes were of same age group having mean length and weight of 7.13 ± 1.37 cm and 2.46 ± 0.12 g respectively. The fish in all the net cages were fed a diet containing 34% protein. The result of the study showed that fish in the treatment T1 stocked at the rate of 40 fish/m³ resulted the best individual weight gain followed by T2 and T3 respectively. The specific growth rate (SGR) ranged between 3.51 and 3.09, the food conversion ratio (FCR) values ranged between 1.73 and 2.04 with treatment T1 resulting the lowest FCR. The protein efficiency ratios (PER) values were 1.69, 1.16 and 1.43 for treatment T1, T2 and T3 respectively. There was no significant (P〉0.05) variation among the survival rates of fish which ranged between 92 and 95%. The net productions in different treatments were 2189, 2343, and 2283g for treatment T1, T2 and T3 respectively. The result of the present study indicated that the best individual growth of P. sutchi was obtained at a density of 40 fish/m³ but the highest total production was obtained at a stocking density of 50 fish/m³ in net cages.
    Keywords: Aquaculture ; formulated diets ; stocking density ; cage culture ; proteins ; artificial feeding ; fish culture ; cages ; Pangasius sutchi
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    Type: article
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    Format: application/pdf
    Format: 173-180
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    In:  http://aquaticcommons.org/id/eprint/16431 | 12051 | 2015-03-27 09:25:50 | 16431 | Bangladesh Fisheries Research Institute
    Publication Date: 2021-07-05
    Description: A study on the effects of artificial feeds on the growth and production of fishes in polyculture in 6 ponds along with some limnological conditions was conducted. Species of Indian and Chinese major carps (Labeo rohita, Catla catla, Cirrhinus mrigala, Hypophthalmicthys molitrix) and catfishes (Clarias batrachus, Clarias gariepinus) were stocked in 6 ponds. Stocking rate in both cases were 32044 fingerlings per hectare. Ratio of species of Rui:Catla:Mrigal:Silver carp:African Magur:Local Magur=25%:25%:5%:25%:14%:6%. Fertilization and artificial feeds were given in 3 ponds (treatment I) and only fertilization was done in other 3 ponds (treatment II). Average yield/ha/yr was 7.903 m.ton in case of fertilization and artificial feeding application and 3.374 m.ton in case of only fertilization application. Urea, TSP and cow dung were applied fortnightly at the rates of 400 kg/ha/yr, 2000 kg/ha/yr and 4000 kg/ha/yr respectively. Wheat bran, rice bran and mustard oil cake were given daily as an artificial feed in treatment I. Whereas treatment II was conducted without any artificial feed. Ratio of artificial feed was wheat bran:rice bran:oil cake=2:2:1 (by wt). Absence of artificial feed in 3 ponds under treatment II seriously affected the growth and production of fish.
    Keywords: Aquaculture ; diets ; fertilizers ; polyculture ; freshwater aquaculture ; artificial feeding ; fish culture ; Labeo rohita ; Clarias batrachus ; Cirrhinus mrigala ; Hypophthalmichthys molitrix ; Clarias gariepinus ; Catla catla ; Bangladesh
    Repository Name: AquaDocs
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    In:  http://aquaticcommons.org/id/eprint/16513 | 12051 | 2015-04-03 06:49:22 | 16513 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Increase in body protein concentration was noted in the fry of rohu fed vitamin E at 0.0 mg, 25 mg, 50 mg, 75 mg 100 mg, 150 mg, 200 mg, 300 mg, and 400 mg/kg of formulated diet. The protein content of fry was found to be significantly different between the different levels of vitamin E. It was found to be maximum (18.7%) in the case of vitamin E at 75 mg/kg diet followed by vitamin E at 100 mg/kg diet. On increasing of vitamin E above 100 mg per kilogram diet there was further decline in the protein content of the fry. The protein increase, from the initial value (12.5%), were recorded to be 14.4%, control; 21.6%, 25 mg level; 31.2%, 50 mg level; 49.6%, 75 mg level; 45.6%, 100 mg level; 14.4%, 150 mg level; 28% 200 mg level; 29.6%, 300 mg level and 13.6% for 400 mg level in different experimental groups.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; vitamin deficiencies ; freshwater fish ; Labeo rohita ; Bombay ; Maharashtra ; India
    Repository Name: AquaDocs
    Type: article
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    Format: application/pdf
    Format: 139-143
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    In:  http://aquaticcommons.org/id/eprint/16520 | 12051 | 2015-04-03 07:00:21 | 16520 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Utilization of wastewater in fish culture is based on nutrient recycling, which enhances primary productivity, planktonic biomass, macrophytes and benthic organisms which determine fish production. Production of fishes could be enhanced to 10 ton/ha through wastewater recycling by judicial stock manipulation and management. The fallow lands around a sewage fish farm could be utilized for agri-horticultural production by recycling both sludge and sewage water, resulting in a total agro production of about 110 ton/ha through rotational vegetable cropping. The potential for additional production of vegetables not only enhances revenue but also creates employment.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; integrated aquaculture systems ; water quality ; aquaculture effluents ; wastewater facilities ; wastewater utilization ; wastewater aquaculture ; aquaculture techniques ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 57-62
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    In:  http://aquaticcommons.org/id/eprint/16507 | 12051 | 2015-04-03 06:44:13 | 16507 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Quantitative assays of trypsin, amylase and alkaline phosphatases were made in relation to age and food during the larval development of the Indian major carp Catla catla. The responses of all the test enzymes to age and food were identical. No enzymes were detected from the fertilized eggs. Detectable amount of enzymes were first observed in the first day old hatchlings. All the test enzymes in the group fed normal feed tended to rise gradually with advancement of age till day 22 after which an asymptotic level was attained. Absence of food throughout the rearing period caused the enzymatic activity of the larva to remain at the lowest level throughout. When starvation was followed by feeding, enzymatic activity in the former group was consistently higher than that of latter, suggesting that feeding activity was primarily responsible in maintaining the enzymatic activity of carp larva. The enzymatic activity of zooplankton was significantly higher than carp larva till day 6 to 12 after which the latter exceeded the former implying that carp larva during development utilizes the exogenous enzymes of zooplankton.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; enzymes ; freshwater fish ; Catla catla
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: 97-106
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    Louisiana Universities Marine Consortium | Chauvin, LA
    In:  http://aquaticcommons.org/id/eprint/16531 | 30 | 2015-03-30 17:02:26 | 16531 | Louisiana Universities Marine Consortium (LUMCON)
    Publication Date: 2021-07-06
    Description: This report reviews some of the natural ecological processes at work within a salt marsh as they relate to a spill of natural gas condensate - a mixture of aliphatic hydrocarbons, n-hexane, benzene, toluene, and xylene. It also reviews the environmental impacts of some of the components of natural gas condensate as well as related compounds (crude oil, higher molecular weight hydrocarbons, polycyclic aromatic hydrocarons - PAHs, linear alkyl-benzenes - LABs, etc.) on salt marsh ecosystems in southern Louisiana and elsewhere in the world. The behavior and persistence of these compounds once they have entered the environment is also considered.
    Description: A report to El Paso Energy, Inc., Houston, Texas. PDF includes front matter, 62 pages of text, 40 figures, and 9 tables.
    Keywords: Chemistry ; Ecology ; Environment ; Pollution
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 122
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    In:  http://aquaticcommons.org/id/eprint/16534 | 12051 | 2015-04-03 07:15:39 | 16534 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Laboratory experiments were conducted to determine the effect of compounded feeds on growth of juveniles (3 to 4 cm) of the Banana prawn Penaeus merguiensis. In all, seven diets were prepared with different combinations of locally available ingredients. Diascure, a local tuber was used as source of carbohydrate and vitamin mineral mixture (1%) was used in all the diets. The results indicated that diets with groundnut cake (diet 2, 3, 5 and 7) produced better survival and growth. In diets 4 and 6 growth was good but survival was very poor. Amongst all the diets, diet 7 produced significantly better growth, survival and food conversion ratio.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Banana prawn ; Penaeus merguiensis ; growth rate ; feeding experiments ; freshwater aquaculture ; Maharashtra ; India
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16536 | 12051 | 2015-04-08 19:01:46 | 16536 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: The results of experiments conducted on a pond dyke (655m²) in the Wastewater Aquaculture Division of the Central Institute of Freshwater Aquaculture, Rahara, during 1992-93 for maximising production through optimum utilisation of resources are communicated. Round the year intensive cultivation of okra (Abelmoschus esculentus), amaranth (Amaranthus gangeticus and A. viridus), water-bind weed (Ipomea aquatica), Indian spinach (Basella rubra), radish (Raphanus sativum), amaranth (Amaranthus viridis), cauliflower (Brassica oleracia var. votrytis), cabbage (Brassica oleracia var. capitota) and papaya (Carica papaya) was undertaken using the treated sewage water from fish ponds for irrigation. The pond dyke yielded 5,626.5 kg vegetable which worked out to 85.9 tons per ha per year. Multiple cropping with these vegetables excluding papaya on a 460 m² dyke recorded a production of 4,926.5 kg at the rate of 107.1t per ha/yr. An improved yearly net return of about 35% over investment could be achieved through the selection of highly productive and pest resistant vegetable crops of longer duration for integration into the system. Introduction of this type of integrated farming would enhance the overall productivity and returns from farming.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Abelmoschus esculentus ; Amaranthus gangeticus ; Amaranthus viridus ; Ipomea aquatica ; Basella rubra ; Raphanus sativum ; Brassica oleracia ; Carica papaya ; polyculture experiments ; integrated aquaculture system ; vegetable cultivation ; sewage water ; India
    Repository Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 33-40
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    In:  http://aquaticcommons.org/id/eprint/16547 | 12051 | 2015-04-03 07:25:15 | 16547 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Kanyakumari district belonging to the high rainfall zone has resource advantages for composite fish culture in the leased-in village tanks. There are more than 400 fish farmers operating in leased-in tanks following composite fish culture under the FFDA programme. To estimate the economic feasibility and financial viability of the enterprise, the present study was taken up. 38 fish farmers selected from the district provided the necessary information like capital investment, costs and return and constraints. The data collected were analysed and a farm nearest to the average farm situation was taken as the representative farm. Investment criteria like PayBack Period (PBP), Simple Rate of Returns (SRR), Net Present Value (NPV) and Benefit Cost Ratio (BCR) were estimated taking into account a period of 10 years, the period for which the village tanks are leased-out to fish farmers under the FFDA programme. The analysis indicated the profitability of composite fish culture in village tanks in the district and the results are discussed with recommendations.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; freshwater fish culture ; economic feasibility ; cost analysis ; Kanyakumari ; Tamil Nadu ; India
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    Type: article
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    Format: application/pdf
    Format: 115-119
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    In:  http://aquaticcommons.org/id/eprint/16561 | 12051 | 2015-04-08 18:58:52 | 16561 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Larval growth during stage I-VIII was studied in Macrobrachium rosenbergii. Duration in moult periodicity were recorded-during larval development period, larvae were fed with Brachionus (grown on Baker's yeast and also Brachinous raised through organic manuring in outdoor culture containers). The performance of the feed was evaluated through substitution of Brachionus in the feeding protocol, in lieu of Artemia 1st instar. The Artemia, Brachionus substitution ratio of 75:25 was found to be most efficient. The study also indicates that the comparative growth rate of Brachionus plicatilis is higher in manure loaded tanks than with Baker's yeast. Growth rate "Y'' in culture tank being 0.245 and 0.112 and corresponding duplicating time (Td) too was found to be 2.855 and 6.365 respectively in tanks manured/enriched with pig manure.
    Keywords: Aquaculture ; feeding efficacy ; substitution ratio ; Artemia ; Brachionus plicatilis ; Macrobrachium rosenbergii
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    Type: article
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16574 | 12051 | 2015-04-08 18:55:26 | 16574 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: The experiment indicated feasibility of culturing Indian major carps seed with Lates calcarifer, if the size of Indian major carps is larger. In the present investigation the average growths of Catla catla, Labeo rohita and Cirrhinus mrigala are recorded as 1193, 1120 and 821 g, respectively, during the year 1997-98, 1998-99 and 1999-2000 in 7.5 months. Complete harvesting of L. calcarifer is essential before stocking of new seed. The average growth of L. calcarifer was recorded as about 670 g during the above period. About 5000 numbers of Indian major carps fry per hectare can be stocked under the present culture system
    Keywords: Aquaculture ; Lates calcarifer ; feeding habits ; survival rate ; growth rate ; freshwater aquaculture ; polyculture ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 73-78
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    In:  http://aquaticcommons.org/id/eprint/16521 | 12051 | 2015-04-03 07:00:59 | 16521 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Optimum growth, impaired growth and mortality hi black molly are studied in diluted sea water, sea water and also by introducing laboratory prepared diets. Rapid acclimation in conjunction with enhanced growth capacity was attained at 2‰ concentration of common salt in water, and 2‰ and 5‰ dilutions of sea water. 22‰ protein content in the diet was found to be adequate for growth and fertility of fishes acclimated at a salinity of 2‰. Higher protein content and other nutritive elements were necessary for fishes acclimated at 5‰ and 14‰. Fertility was increased in sea-water dilutions rather than in common salt-water dilutions.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; black mollies ; Poecilia sphenops ; growth rate ; fecundity rate ; salinity levels ; osmoregulatory processes
    Repository Name: AquaDocs
    Type: article
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16526 | 12051 | 2015-04-03 07:08:46 | 16526 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Darbhanga district in North Bihar is characterised by thick alluvial soil, moderately good rainfall, high humidity, ample sunshine and numerous water resources in the form of perennial rivers, tributaries, streams, lakes, ponds, pools and puddles. The aquacrops of this district include several species of commercially important fishes, aquatic cash crops such as makhana (Euryale ferox), singhara (Trapa spp.), lotus, lilly, Khubi etc. and molluscs. This paper highlights the commercial significance of these aquacrops and offers suggestions for their sustained development.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; freshwater fishes ; commercial species ; integrated aquaculture systems ; aquaculture enterprises ; aquatic plants ; seeds ; Darbhanga ; Bihar ; India
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    Type: article
    Format: application/pdf
    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16539 | 12051 | 2015-04-03 07:20:17 | 16539 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Two sets of experiments were conducted to determine the dietary cholesterol requirement of larvae and postlarvae 1-10 of Penaeus indicus. Seven approximately isocaloric and isonitrogenous purified experimental diets were tried with graded levels of cholesterol ranging from 0 to 4%. The control feed for larvae and postlarvae 1-10 were phytoplankton and compounded feed NPCL-17, developed by CMFRI, Cochin respectively. Result of these experiments indicates that cholesterol is an essential nutrient in the diet of larvae and postlarvae 1-10. Survival and growth of larvae and postlarvae 1-10 were greatly affected by cholesterol deficiency in the diet. The optimal cholesterol requirement for larvae appeared to be 0.5% of the diet, while it was higher for postlarvae where inclusion of cholesterol at a level of 2% in the diet gave higher growth.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Penaeus indicus ; larvae ; feeding experiments ; diets ; cholesterol deficiency ; survival rate ; growth rate
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    Type: article
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    Format: application/pdf
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    In:  http://aquaticcommons.org/id/eprint/16540 | 12051 | 2015-04-03 07:21:03 | 16540 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: To test the efficacy of the technique of using dopamine-antagonists with pituitary extracts, experiments were conducted in July/August '93, at the CIFE Fresh water Fish Farm, Powerkheda. In all, 35 sets (1 female x 2 male in each set) were tried individually. 19 sets were treated with Domperidone (DOM) and Carp Pituitary Extract (CPE) and they constituted the experimental sets, while the rest 16 were treated with CPE and formed the control sets. The breeding, complete ovulation and hatching was 84.2%, 87.5% and 85.7%, respectively in the experimental sets whereas it was 93.7%, 60% and 72.7%, respectively in case of control sets. Experimental sets yielded 1.20 lakh spawn/kg body wt. (female) as compared to 0.83 lakh spawn kg body wt. (female) received from control sets on average basis. When DOM was used at 50-60% there was 100% breeding success but when increased to 70%, breeding rate fell to 66%. In mass breeding of Catla in the circular hatchery DOM mixed with CPE in 50:50 ratio gave excellent results.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Indian major carps ; spawning ; ovulation ; induced breeding ; experiments ; Domperidone ; Carp Pituitary Extract ; aquaculture techniques ; India
    Repository Name: AquaDocs
    Type: article
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    Format: application/pdf
    Format: 75-84
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    In:  http://aquaticcommons.org/id/eprint/16543 | 12051 | 2015-04-03 07:22:33 | 16543 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: The key factor in success of a Macrobrachium hatchery is to yield maximum number of larvae with minimum number of brooders. Suitable environmental conditions were provided and the breeding performance of females of M. rosenbergii was observed. A total number of 140 females brought from wild were used for this purpose. Each female was tagged and given a code number which made it possible to record the gestation period, interbreed period, number of breeding and larval yield of individual female during each breeding. Females were found to breed six times during the ten months duration. Of the total females studied, 99.12 % bred once, while only 2.16 % females bred six times in a total span of ten months. The average number of larvae decreased successively from first to fourth breeding. The average interbrood period was minimum between the first and second breeding and maximum between the fourth and fifth breeding. The highest average larval yield of 25,428 was recorded in the first breeding, the lowest of 4,596 in the fourth breeding. The possible reasons for variations in interbrood period and larval yield are discussed.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; Biology ; Macrobrachium rosenbergii ; prawns ; breeding performances ; captivity
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 93-97
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    In:  http://aquaticcommons.org/id/eprint/16537 | 12051 | 2015-04-03 07:19:00 | 16537 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Tripura is a densely populated small state with meagre water resources. 47.51% of the population is constituted by socio-economically backward, illiterate, orthodox, tribal and scheduled castes. Some of them are nomad and a majority of the rest of the population is refugees from Bangladesh, but almost 100% is fish eater. Settlement of tribes in villages, provision of nutritious food and employment therefore calls for proper utilization of every resource they have. The State is poor in water resources but recently has created 21,636.23 ha of new water area. Tripura is rich in pig population, besides poultry birds. Paddy is the main crop cultivated in arable lands. An integration of livestock raising and land based agriculture with pisciculture practices around mini barrages will help in solving the problems to a great extent. The paper is an attempt to outline the prospects of integration of aquaculture with animal husbandry and land based crop culture in Tripura State.
    Description: Paper presented at the National Symposium on Aquacrops, 16-18 November 1994, Versova, Bombay (India)
    Keywords: Aquaculture ; polyculture ; integrated farming systems ; animal husbandry ; crop culture ; Tripura ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 41-51
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    In:  http://aquaticcommons.org/id/eprint/16576 | 12051 | 2015-04-08 18:54:50 | 16576 | Indian Fisheries Association
    Publication Date: 2021-07-06
    Description: Five species of crabs and three species of fishes were the main marine organisms found damaging embankments owing to their burrowing nature. Among crabs, Scylla serrata was in the highest percentage, while among fishes, Boleopthalamus dussumieri was recorded in maximum percentage calcium carbide 10-15 per burrow was effective in eradicating the crabs.
    Keywords: Aquaculture ; marine crabs ; Scylla serrata ; Uca vocans hesperiae ; Sesarma sp. ; Galene bispinosa ; Portunus pelagicus ; marine fishes ; Conger cinereus ; Anguilla sp. ; Boleophthalmus dussumieri ; embankment ; burrowing animals ; control measures
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 87-91
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    In:  http://aquaticcommons.org/id/eprint/16581 | 12051 | 2015-04-08 18:53:43 | 16581 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: The paper deals with the experimental studies on breeding of Indian Major Carps - Catla catla (Valenciennes), Labeo rohita (Hamilton), Cirrhinus mrigala (Hamilton), & Labeo calbasu (Hamilton) with the help of 'Ovatide' which is being used as an alternative inducing agent for commercial seed production. This study has been conducted for six consecutive months (April - September, 2000) in a stone-pitched breeding channels of a farm located at Midnapore District, West Bengal. The doses of 'Ovatide' (0.5 ml/kg of fish weight) remained same for each female species during the entire study period and males were released without any dose. The physicochemical parameters of water during different months were estimated. The latency period and fertilization percentage varied in different months and species. The results confirmed that 'Ovatide' can be used successfully in a much more cost-effective way for induced breeding of carps, even in rural fish farms with morrum-pitched breeding channels.
    Keywords: Aquaculture ; Indian major carps ; Catla catla ; Labeo rohita ; Cirrhinus mrigala ; Labeo calbasu ; breeding ; inducing agents ; ovatide ; rural fish farms ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 125-129
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    In:  http://aquaticcommons.org/id/eprint/16589 | 12051 | 2015-04-08 18:51:52 | 16589 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: Effect of different feeds and salinities on cyst production in Artemia sp. was studied. Among the 12 different feeds used, ragi powder suspension showed the best growth and cyst production. A wide range of salinity from 90 to 210‰ was used to study its effect on cyst production. Among all these treatments, 130‰ salinity was found suitable for induction of oviparity and cyst production in the San Francisco Bay strain of Artemia sp.
    Keywords: Aquaculture ; Artemia sp. ; oviparity ; cysts ; feeds ; reproductive capacity ; San Francisco ; California ; United States of America
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 37-47
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    In:  http://aquaticcommons.org/id/eprint/16587 | 12051 | 2015-04-08 18:52:23 | 16587 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: A study conducted in a 450 m² earthen pond to evaluate the production potential of giant freshwater prawn (stocked at 20,000 juveniles/ha) and Indian major carps, catla and rohu (stocked at 5000 juveniles/ha in 2:1 proportion) revealed that in nine months growing period, catla and rohu attained average sizes of 357 and 746 g, respectively, while prawn weighed 48.32 g. The growth of rohu was much faster than catla as indicated by higher relative and absolute weight gains. The total fish production per hectare was estimated to be 2418 kg and prawn production stood at 780 kg with excellent survival of both the fish (〉98%) and prawn (〉80%).
    Keywords: Aquaculture ; Macrobrachium rosenbergii ; Catla catla ; Labeo rohita ; Indian major carps ; giant freshwater prawn ; polyculture
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 15-21
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    In:  http://aquaticcommons.org/id/eprint/16597 | 12051 | 2015-04-08 18:49:34 | 16597 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: The present study deals with the length increment data of 15 adult Labeo rohita (Ham.) over a period of five months by the applicatin of finite difference method at an altitude of 1496 m above mean sea level at Shilllong, Meghalaya.
    Keywords: Aquaculture ; mean sea level ; growth curves ; length ; finite difference method ; gonads ; freshwater fish ; Labeo rohita ; Indian major carps ; Shillong ; Meghalaya ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 111-116
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    In:  http://aquaticcommons.org/id/eprint/16588 | 12051 | 2015-04-08 18:52:07 | 16588 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: An analysis of the factor-product relationship in the semi-intensive shrimp farming system of Kerala, farm basis and hectare basis, we are attempted and the results reported in this paper. The Cobb-Douglas model, in which the physical relationship between input and output is estimated, and the marginal analysis then employed to evaluate the producer behaviour, was used for the analysis. The study was based on empirical data collected during November 1994 to May 1996, covering three seasons, from 21 farms spread over Alappuzha, Ernakulam and Kasaragod districts of the state. The sample covered a total area of 61.06 ha. Of the 11 explanatory variables considered in the model, the size of the farm, casual labour and chemical fertilizers were found statistically significant. It was also observed that the factors such as age of pond, experience of the farmer, feed, miscellaneous costs, number of seed stocked and skilled labour contributed positively to the output. The estimated industry production function exhibited unitary economies of scale. The estimated mean output was 3937 kg/ha. The test of multi-co-linearity showed that there is no problem of dominant variable. On the basis of the marginal product and the given input-output prices, the optimum amounts of seed, feed and casual labour were estimated. They were about 97139 seed, 959 kg of feed and 585 man-days of casual labour per farm. This indicated the need for reducing the stocking density and amount of feed from the present levels, in order to maximise profit. Based on the finding of the study, suggestions for improving the industry production function are proposed.
    Keywords: Aquaculture ; shrimp aquaculture ; shrimp farming ; semi-intensive farming systems ; Cobb-Douglas model ; productivity evaluation ; production function ; Alappuzha ; Ernakulam ; Kasaragod ; Kerala ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 23-36
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    In:  http://aquaticcommons.org/id/eprint/16596 | 12051 | 2015-04-08 18:50:11 | 16596 | Indian Fisheries Association
    Publication Date: 2021-07-07
    Description: Information on socio-economic framework of the fish farmer community forms a benchmark for policy formulation to develop this economically backward sector. Very few studies have been conducted on the socio-economic aspect of fish farming. Two districts of Assam, Darrang and Nagaon, were selected for this study where 120 respondents from each district were selected randomly. The characteristics representing the personnel and socio-economic attributes of the fish farmers are presented in this paper. The socio-economic status of fish farmers has to be improved by bringing the modern concepts of fish farming to the doorstep of farmers.
    Keywords: Aquaculture ; fish farming ; socio-economic frameworks ; Darrang ; Nagaon ; Assam ; India
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 103-110
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/10991 | 115 | 2013-03-17 12:38:07 | 10991 | WorldFish Center
    Publication Date: 2021-06-25
    Description: When different strains or breeds of a particular species are available, the best choice is seldom immediately obvious for producers. Scientists are also interested in the relative performance of different strains because it provides a basis for recommendations to producers and it often stimulates the conduct of work aimed at unraveling the underlying biological mechanisms involved in the expression of such differences. Hence, strain or breed comparisons of some sort are frequently conducted. This manual is designed to provide general guidelines for the design of strain comparison trials in aquaculture species. Example analyzes are provided using SAS and SPSS. The manual is intended to serve a wide range of readers from developing countries with limited access to information. The users, however, are expected to have a basic knowledge of quantitative genetics and experience in statistical methods and data analysis as well as familiarity with computer software. The manual mainly focuses on the practical aspects of design and data analysis, and interpretation of results.
    Description: CGIAR Research Program Livestock & Fish
    Keywords: Aquaculture ; Aquaculture ; Genetics ; Selective breeding
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 31
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    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/10632 | 115 | 2013-07-12 04:44:53 | 10632 | WorldFish Center
    Publication Date: 2021-06-27
    Description: Aquaculture production systems in developing countries are largely based on the use of unimproved species and strains. As knowledge and experience are accumulated in relation to the management, feeding and animal health issues of such production systems, the availability of genetically more productive stock becomes imperative in order to more effectively use resources. For instance, there is little point in providing ideal water conditions and optimum feed quality to fish that do not have the potential to grow faster and to be harvested on time, providing a product of the desired quality. Refinements in the production system and improvement of the stock used must progress hand in hand. In this paper we deal separately with genetic and non-genetic issues pertaining to the multiplication and dissemination of improved strains. The separation is somewhat arbitrary, and as will be evident from our discussion, there is frequent interaction between the two.
    Description: CGIAR Research Program on Livestock and Fish
    Keywords: Aquaculture ; Aquaculture ; Genetics ; Selective breeding
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 15
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