Larvas Dos Grandes Bagres Migradores

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Larvas Dos Grandes Bagres Migradores

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Author :
language : es
Publisher:
Release Date : 2007

Larvas Dos Grandes Bagres Migradores written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

Biodiversity

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Author : Oscar Grillo
language : en
Publisher: BoD – Books on Demand
Release Date : 2014-05-14

Biodiversity written by Oscar Grillo and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-14 with Science categories.

The current world biodiversity consists of an inestimable amount of living forms, that at all levels, from genes to biomes, from individuals to populations, from species to communities, are in constant pursuit of the best strategies to react to the natural and anthropic environmental changes. The arrangement of new and dynamic ecosystems balanced by the formation and the vanishing of species, is the direct consequence of these changes. This book contains comprehensive overviews and original studies focused on ecological and ecosystem functioning studies, hazards and conservation management, assessment of environmental variables affecting species diversity, also considering species richness and distribution, in order to identify the best management strategies to face and solve the conservation problems.

Neotropical Ichthyology

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Author :
language : en
Publisher:
Release Date : 2008

Neotropical Ichthyology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Electronic journals categories.

Size Based Assessment Of Data Limited Inland Fish Stocks Review And Applications

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Author : Shephard, S., Valbo-Jorgensen, J., Abadía, J., Baigún, C., Doria, C.R.C., Fabré, N.N., Isaac, V.J., Ngor, P.B., Ruffino, M.L., Funge-Smith, S.J.
language : en
Publisher: Food & Agriculture Org.
Release Date :

Size Based Assessment Of Data Limited Inland Fish Stocks Review And Applications written by Shephard, S., Valbo-Jorgensen, J., Abadía, J., Baigún, C., Doria, C.R.C., Fabré, N.N., Isaac, V.J., Ngor, P.B., Ruffino, M.L., Funge-Smith, S.J. and has been published by Food & Agriculture Org. this book supported file pdf, txt, epub, kindle and other format this book has been release on with Technology & Engineering categories.

Assessment of data-limited fish stocks is a rapidly evolving topic in marine fisheries, and is supported by an increasing focus on the socio-economic and ecological importance of small-scale fisheries. The challenges in such systems can be compounded in inland fisheries, which are often complex, spatially dispersed and difficult to monitor. This publication reviews the application of empirical indicators and simple size-based models usually used in marine fisheries, but also applicable in inland systems. It presents case study applications for important fisheries in the Amazon River (Brazil), Tonlé Sap River (Cambodia), Paraná River (Argentina) and Lago Bayano (Panama). These studies consider issues including spatial separation of life-history stages, strong modality in population size structure, and fishing gear selectivity. Local scientific experts interpreted trends in stock state. Empirical indicators showed strong decline in size structure and relative abundance for one of the four assessed Tonlé Sap stocks. The length-based spawning potential ratio model suggested that two of the three assessed Amazon Goliath catfish stocks, and the sábalo stock in the Paraná River, were below sustainable spawning potential ratio reference points. The Lago Bayano tilapia stock appeared healthy. The review concludes that data-limited assessment methods developed for marine stocks may provide guidance for the sustainable management of important target species in inland fisheries. The methods tested are probably less applicable in non-selective fisheries where small species are preferred, or in river fisheries with extreme dependence on flood pulses. Important considerations are species life history and spatial distribution, environmental variability, and fishery sampling strategy.

Os Bagres Balizadores

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Author : Ronaldo Barthem
language : pt-BR
Publisher:
Release Date : 1997

Os Bagres Balizadores written by Ronaldo Barthem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Fish populations categories.

Grandes peixes dos canais dos rios amazonicos. Tecnologia da exploracao dos bagres: embarcacao pesqueira, pesca com redes de emalhar a dereva e de espinhel, redes de arrasto de praia, arrastos com malhadeiras, arpao, fisga, tarrafas e arrastos em parelha - pesca industrial no estuario. Producao e valor economicos dos bagres. Migracao e reproducao. Bagres como predadores. Manejo possivel e necessario.

An Unexpected Ecosystem

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Author : Ronaldo Barthem
language : en
Publisher:
Release Date : 2007

An Unexpected Ecosystem written by Ronaldo Barthem and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Fisheries categories.

The principle purpose of this book is to present a synthesis of the ecology of Amazon fisheries that can be used to transform management and conservation strategies to a more realistic ecological scale.

Acta Amazonica

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Author :
language : pt-BR
Publisher:
Release Date : 1996

Acta Amazonica written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Natural history categories.

Each issue to contain material in each of seven subject fields: botany, forestry research, environmental sciences, phytochemistry, tropical medicine, zoology and technology.

Popula Es Humanas Rios E Mares Da Amaz Nia

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Author :
language : pt-BR
Publisher:
Release Date : 1992

Popula Es Humanas Rios E Mares Da Amaz Nia written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aquatic resources categories.

Migratory Fishes Of South America

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Author : Joachim Carolsfeld
language : en
Publisher: IDRC
Release Date : 2003

Migratory Fishes Of South America written by Joachim Carolsfeld and has been published by IDRC this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Nature categories.

Inland Fisheries

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Author :
language : en
Publisher: John Wiley & Sons
Release Date : 2008-04-15

Inland Fisheries written by and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-04-15 with Technology & Engineering categories.

The current high demand for fish and increased awareness of the role of the environment in supporting human well being has led to a situation where attitudes to inland water resources are changing rapidly. Trends in resource use and environmental impact are very evident in inland waters which are particularly vulnerable as they act as collectors of all the activities occurring in their basins and rank as some of the most endangered ecosystems in the world. The principle changes influencing the evolution of the aquatic resource for fisheries are described in this book, which has been compiled for the Food and Agriculture Organization of the United Nations.