Results 81 to 90 of about 10,222 (244)

Long‐term shifts in pikeperch, Sander lucioperca, diet composition in a changing reservoir

Journal of Fish Biology, EarlyView.
Abstract As a significant piscivorous predator, the pikeperch (Sander lucioperca) plays a critical role in regulating aquatic ecosystems. Understanding its size‐related feeding behaviour is thus vital for assessing its impact. To evaluate its role in the ecosystem, stomach content analysis provides useful insights into predator–prey dynamics.
Karlos Ribeiro de Moraes, Million Tesfaye, Daniel Bartoň, Petr Blabolil, Jakub Brabec, Marek Brabec, Vladislav Draštík, Marie Prchalová, Josef Matěna, Milan Muška, Michal Tušer, Tomáš Jůza, Luboš Kočvara, Zuzana Sajdlová, Katerina Soukalová, Allan T. Souza, Marek Šmejkal, Radka Symonová, Milan Říha, Mojmír Vašek, Jan Kubečka   +20 more
wiley   +1 more source

A Machine Learning Technique for Deriving the Optimal Mesh Size of a Gizzard Shad (Konosirus punctatus) Gillnet

Journal of Marine Science and Engineering
Gizzard shads are facing a continual decline in population, necessitating the implementation of selective gear design for effective resource management.
Myungsung Koo, Inyeong Kwon
doaj   +1 more source

The fishery of tamoatá Hoplosternum littorale (Hancock, 1828) (Siluriformes: Callichthyidae) in the Marajó Island [PDF]

Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas, 2008
Hoplosternum littorale (Hancock, 1828) (Siluriformes, Callichthyidae) is a middle size catfish, known in the Brazilian Amazon as ‘tamoatá’. It uses an accessory air-breathing organ to live in the poor oxygen swamps of the mouth of Amazon and Orinoco ...
Adna Almeida de Albuquerque, Ronaldo Borges Barthem   +1 more
doaj  

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil

Journal of Fish Biology, EarlyView.
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Lucas E. P. Kampfert, João C. Maicrovicz, Daniel R. Blanco, Denise Lange, Carla S. Pavanelli, Heleno Brandão   +5 more
wiley   +1 more source

Plasticity in the reproductive biology of Yellowstone cutthroat trout Oncorhynchus virginalis bouvieri in Yellowstone Lake following lake trout Salvelinus namaycush invasion

Journal of Fish Biology, EarlyView.
Abstract Yellowstone cutthroat trout Oncorhynchus virginalis bouvieri in Yellowstone Lake are the focus of intensive conservation efforts due to the threat of predation by invasive lake trout Salvelinus namaycush. Suppression gillnetting has reduced the abundance of predatory lake trout, and the Yellowstone cutthroat trout population is recovering ...
Michelle A. Briggs, Molly A. H. Webb, Christopher S. Guy, Todd M. Koel   +3 more
wiley   +1 more source

Management of gillnet fisheries in the south coast of the state of São Paulo, Brazil

Anais da Academia Brasileira de Ciências, 2014
Gillnetting is one of the most practiced fishing methods adopted in the South of Brazil and has been increasingly expanding over the last years. This paper presents the characterization of the activity and discusses its management, in accordance to ...
JOCEMAR T. MENDONÇA, ALINEIDE L.C. PEREIRA   +1 more
doaj   +1 more source

Integrating Porpoise and Cod Management: A Comparison of Days-at-sea, ITQs, and Closures [PDF]

The purpose of this study is to determine if management measures based on effort reductions, in particular days-at-sea (DAS) controls, can approach a harbor porpoise individual transferable quotas (ITQ) program in terms of efficiency.
Bisack, Kathryn D.
core   +1 more source

Fisheries and Marine Resources of Hawaii and the U.S.-associated Pacific Islands: An Introduction [PDF]

, 1993
The fisheries of Hawaii and other U.S.-associated islands in the Pacific Ocean are characterized by high diversity, both in the species exploited and the human cultures that exploit them.
Boehlert , George W.
core  

Age and growth of the endemic groovebelly stingray (Dasyatis hypostigma), a heavily exploited batoid in the Brazilian Meridional Margin (21–34° S)

Journal of Fish Biology, EarlyView.
Abstract Life‐history data are often lacking for exploited elasmobranchs, jeopardizing proper management and conservation measures for this vulnerable group. Herein, we provided age and growth estimates for the groovebelly stingray (Dasyatis hypostigma), a medium‐sized, heavily exploited batoid endemic to the southwestern Atlantic Ocean.
Giovanni Arlan Torres, Rodrigo Silvestre Martins, Luciano Gomes Fischer, Luís Gustavo Cardoso, Rodrigo Sant'Ana, Bruno Mourato   +5 more
wiley   +1 more source

Interaction between the California sea lion and the artisanal fishery in La Paz Bay, Gulf of California, Mexico

Ciencias Marinas, 2003
Information about California sea lion prey and the artisanal fishery catch in the area of the Los Islotes sea lion rookery, in northeastern La Paz Bay, México, was examined to estimate potential overlap and competition between these consumers. Sea lions
D Aurioles-Gamboa, F García-Rodríguez, M Ramírez-Rodríguez, C Hernández-Camacho   +3 more
doaj   +1 more source