نتایج جستجو برای: reservoir fisheries

تعداد نتایج: 57192  

Journal: :international journal of civil engineering 0
hon.m. asce m.r. jalali a. afshar m.a. mariño

through a collection of cooperative agents called ants, the near optimal solution to the multi-reservoir operation problem may be effectively achieved employing ant colony optimization algorithms (acoas). the problem is approached by considering a finite operating horizon, classifying the possible releases from the reservoir(s) into pre-determined intervals, and projecting the problem on a grap...

2006
John C. Field André E. Punt Richard D. Methot Cynthia J. Thomson

Introduction 285 MPAs, stock assessments and spatial modelling in marine ecosystems 286 The role of fisheries science in management 287 Fishery-dependent information 288 Life-history information 290 Catch demographic data 291 Fishery-independent surveys 291 Spatial variability and movement patterns 293 Structure of assessment models 293 Fisheries management objectives and obligations 296 Abstra...

2010
Wilf Swartz Enric Sala Sean Tracey Reg Watson Daniel Pauly

Using estimates of the primary production required (PPR) to support fisheries catches (a measure of the footprint of fishing), we analyzed the geographical expansion of the global marine fisheries from 1950 to 2005. We used multiple threshold levels of PPR as percentage of local primary production to define 'fisheries exploitation' and applied them to the global dataset of spatially-explicit ma...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Ling Cao Yong Chen Shuanglin Dong Arthur Hanson Bo Huang Duncan Leadbitter David C Little Ellen K Pikitch Yongsong Qiu Yvonne Sadovy de Mitcheson Ussif Rashid Sumaila Meryl Williams Guifang Xue Yimin Ye Wenbo Zhang Yingqi Zhou Ping Zhuang Rosamond L Naylor

China's 13th Five-Year Plan, launched in March 2016, provides a sound policy platform for the protection of marine ecosystems and the restoration of capture fisheries within China's exclusive economic zone. What distinguishes China among many other countries striving for marine fisheries reform is its size-accounting for almost one-fifth of global catch volume-and the unique cultural context of...

Journal: :PLoS ONE 2007
S. Hoyt Peckham David Maldonado Diaz Andreas Walli Georgita Ruiz Larry B. Crowder Wallace J. Nichols

BACKGROUND Although bycatch of industrial-scale fisheries can cause declines in migratory megafauna including seabirds, marine mammals, and sea turtles, the impacts of small-scale fisheries have been largely overlooked. Small-scale fisheries occur in coastal waters worldwide, employing over 99% of the world's 51 million fishers. New telemetry data reveal that migratory megafauna frequent coasta...

Journal: :Ambio 2007
Ray Hilborn

There are two diverging views of the status and future of the world's fisheries. One group represented largely by academic marine ecologists sees almost universal failure of fisheries management and calls for the use of marine-protected areas as the central tool of a new approach to rebuilding the marine ecosystems of the world. The scientists working in fisheries agencies and many academic sci...

Journal: :Diversity 2023

Non-fed aquaculture is an important contributor to low environmental impact protein production. However, knowledge of spatiotemporal patterns the fish community in non-fed fishery systems remains limited, despite their ecological importance for sustainable and fisheries. To elucidate status fisheries critical drivers systems, hydroacoustic surveys were conducted seasonally Hongchaojiang Reservo...

2005
J. CHRISTOPHER TAYLOR JESSICA S. THOMPSON PETER S. RAND MONTSERRAT FUENTES

—An understanding of the spatial distribution of forage fish resources is required to make informed fishery management decisions. We used mobile hydroacoustics to assess the distribution and abundance of forage fish in Badin Lake, a reservoir in central North Carolina. By sampling a series of cross-channel and longitudinal transects and analyzing the data using geostatistics, we characterized b...

2011
Xaymara Serrano Joseph Serafy Martin Grosell

Osmoregulatory capabilities of the gray snapper, Lutjanus griseus: salinity challenges and field observations Xaymara Serrano a , Joseph Serafy a b & Martin Grosell a a Division of Marine Biology and Fisheries, University of Miami, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, FL 33149, USA b Southeast Fisheries Science Center, National Marine Fisheries...

Journal: :Annual research & review in biology 2021

The nutritional qualities of wild and cultured Clarias gariepinus from Oba Reservoir, Ikose, Ogbomoso, Oyo State, Nigeria, the fish Department Fisheries Aquaculture, State Ministry Agriculture Mineral Resources, were evaluated. proximate composition, mineral element composition essential amino acids profile sampled species evaluated using standard laboratory procedures. results was observed to ...

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