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Swimming behavior of emigrating Chinook Salmon smolts.
Holleman, Rusty C; Gross, Edward S; Thomas, Michael J; Rypel, Andrew L; Fangue, Nann A.
Afiliação
  • Holleman RC; Center for Watershed Sciences, University of California Davis, Davis, California, United States of America.
  • Gross ES; Department of Civil and Environmental Engineering, University of California Davis, Davis, California, United States of America.
  • Thomas MJ; Department of Wildlife, Fish and Conservation Biology, University of California Davis, Davis, California, United States of America.
  • Rypel AL; Center for Watershed Sciences, University of California Davis, Davis, California, United States of America.
  • Fangue NA; Department of Wildlife, Fish and Conservation Biology, University of California Davis, Davis, California, United States of America.
PLoS One ; 17(3): e0263972, 2022.
Article em En | MEDLINE | ID: mdl-35290382
Swimming behavior of Chinook Salmon (Oncorhynchus tshawytscha) smolts affects transit time, route selection and survival in complex aquatic ecosystems. Behavior quantified at the river reach and junction scale is of particular importance for route selection and predator avoidance, though few studies have developed field-based approaches for quantifying swimming behavior of juvenile migratory fishes at this fine spatial scale. Two-dimensional acoustic fish telemetry at a river junction was combined with a three-dimensional hydrodynamic model to estimate in situ emigration swimming behavior of federally-threatened juvenile Chinook salmon smolts. Fish velocity over ground was estimated from telemetry, while the hydrodynamic model supplied simultaneous, colocated water velocities, with swimming velocity defined by the vector difference of the two velocities. Resulting swimming speeds were centered around 2 body lengths/second, and included distinct behaviors of positive rheotaxis, negative rheotaxis, lateral swimming, and passive transport. Lateral movement increased during the day, and positive rheotaxis increased in response to local hydrodynamic velocities. Swim velocity estimates were sensitive to the combination of vertical shear in water velocities and vertical distribution of fish.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmão / Natação Limite: Animals Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmão / Natação Limite: Animals Idioma: En Ano de publicação: 2022 Tipo de documento: Article