Mechanisms Influencing the Timing and Success of Reproductive Migration in a Capital Breeding Semelparous Fish Species, the Sockeye Salmon

@article{Crossin2009MechanismsIT,
  title={Mechanisms Influencing the Timing and Success of Reproductive Migration in a Capital Breeding Semelparous Fish Species, the Sockeye Salmon},
  author={Glenn T. Crossin and Scott G. Hinch and Steven J. Cooke and Michael S Cooperman and David A. Patterson and David W. Welch and Kyle C. Hanson and Ivan Olsson and Karl K. English and Anthony P. Farrell},
  journal={Physiological and Biochemical Zoology},
  year={2009},
  volume={82},
  pages={635 - 652}
}
Two populations of homing sockeye salmon (Oncorhynchus nerka; Adams and Chilko) were intercepted in the marine approaches around the northern and southern ends of Vancouver Island (British Columbia, Canada) en route to a natal river. More than 500 salmon were nonlethally biopsied for blood plasma, gill filament tips, and gross somatic energy (GSE) and were released with either acoustic or radio transmitters. At the time of capture, GSE, body length, and circulating testosterone ([T]) differed… 
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It is found individuals with early marine exit had higher growth rates in the months prior to river entry, had greater lipid density, and were more likely male, more likely of the 2.2 versus 1.2 age class.
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TLDR
The data presented here appear inconsistent with thermal avoidance as an explanation for the early marine exit timing in Copper Creek and in three other populations on the Haida Gwaii Archipelago with early marineexit.
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It is proposed that wind-induced currents exposed sockeye salmon entering the estuary to stronger olfactory cues associated with Fraser River water, which resulted in faster migration rates presumably due to either an increased ability for olfatory navigation and/or advanced reproductive schedule through a neuroendocrine response to olfitory cues.
Physiological Condition Differentially Affects the Behavior and Survival of Two Populations of Sockeye Salmon during Their Freshwater Spawning Migration
TLDR
It is concluded that physiological condition differentially affects the behavior and survival of these two populations, which may be a consequence of the early‐entry phenomenon by a segment of the Adams‐Shuswap population.
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TLDR
Examining the migratory and reproductive dynamics of Prochilodus costatus in the Sao Francisco River watershed, south‐east Brazil, by comparing the ecological importance of two rivers to the species shows the key role of undammed river segments for the conservation of Neotropic migratory fish species.
Characterizing Migration Behaviour of Adult Fraser River Sockeye Salmon (Oncorhynchus nerka) During Costal and Estuarian Passage Using Acceleration Transmitters
Though behaviour during the reproductive migration of Pacific salmon (Oncorhynchus spp.) has been studied during upriver migrations, equivalent information for coastal marine migrations has been
Coastal marine and in-river migration behaviour of adult sockeye salmon en route to spawning grounds
TLDR
Overall this study demonstrates that using acoustic accelerometer transmitters can provide valuable insights into behaviour of homing sockeye salmon in both marine and freshwater environments.
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TLDR
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TLDR
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TLDR
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TLDR
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Metabolic rates and swimming performance of adult Fraser River sockeye salmon (Oncorhynchus nerka) after a controlled infection with Parvicapsula minibicornis
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