Reproductive energy expenditure and changes in body morphology for a population of Chinook salmon Oncorhynchus tshawytscha with a long distance migration.
TLDR
Average final post-spawning somatic energy densities were low in females and males, consistent with the concept of a minimum energy threshold required to sustain life in semelparous salmonids.Abstract:
Energetic demands of a long freshwater migration, extended holding period, gamete development and spawning were evaluated for a population of stream-type Chinook salmon Oncorhynchus tshawytscha. Female and male somatic mass decreased by 24 and 21%, respectively, during migration and by an additional 18 and 12% during holding. Between freshwater entry and death after spawning, females allocated 14% of initial somatic energy towards gonad development and 78% for metabolism (46, 25 and 7% during migration, holding and spawning, respectively). Males used only 2% of initial somatic energy for gonad development and 80% on metabolic costs, as well as an increase in snout length (41, 28 and 11% during migration, holding and spawning, respectively). Individually marked O. tshawytscha took between 27 and 53 days to migrate 920 km. Those with slower travel times through the dammed section of the migration corridor arrived at spawning grounds with less muscle energy than faster migrants. Although energy depletion did not appear to be the proximate cause of death in most pre-spawn mortalities, average final post-spawning somatic energy densities were low at 3·6 kJ g-1 in females and 4·1 kJ g-1 in males, consistent with the concept of a minimum energy threshold required to sustain life in semelparous salmonids.read more
Citations
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Prespawn Mortality of Female Chinook Salmon Increases with Water Temperature and Percent Hatchery Origin
TL;DR: Observed prespawn mortality rates varied considerably, but where maximum temperatures exceeded 20°C and the composition of spawning fish was >80% hatchery origin, annual female presp Shawn mortality rates were consistently >80%.
Journal ArticleDOI
Bioenergetic consequences of warming rivers to adult Atlantic salmon Salmo salar during their spawning migration
Robert J. Lennox,Erika J. Eliason,Torgeir Børresen Havn,Martin R. Johansen,Eva B. Thorstad,Steven J. Cooke,Ola Håvard Diserud,Frederick G. Whoriskey,Anthony P. Farrell,Ingebrigt Uglem +9 more
TL;DR: This poster presents a probabilistic procedure to characterize the response of fish to infectious disease and shows clear patterns in the response to antibiotics and its applications in fish conservation and food security.
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Individual Based Modelling of Fish Migration in a 2-D River System: Model Description and Case Study.
Marcia N. Snyder,Nathan H. Schumaker,Joseph L. Ebersole,Jason B. Dunham,Randy L. Comeleo,Matthew L. Keefer,Peter Leinenbach,Allen Brookes,Ben Cope,Jennifer Wu,John Palmer,Druscilla Keenan +11 more
TL;DR: A multi-scale hybrid mechanistic–probabilistic simulation model linking migration corridor conditions to fish fitness outcomes and developed a 2-dimensional spatially-explicit behavioral and physiological model that can be used to simulate fish migration within a river system.
Journal ArticleDOI
A bioenergetics evaluation of temperature-dependent selection for the spawning phenology by Snake River fall Chinook salmon.
TL;DR: The model supports the conclusion that increases in average seasonal river temperatures as little as 1°C could impose greater thermal constraints on the fish, select against early migrants, and in turn, truncate the onset of the current spawning migration.
Journal ArticleDOI
Upstream Migration and Spawning Success of Chinook Salmon in a Highly Developed, Seasonally Warm River System
William P. Connor,Kenneth F. Tiffan,James A. Chandler,Dennis W. Rondorf,Billy D. Arnsberg,Kelvin C. Anderson +5 more
TL;DR: In this paper, a review summarizes what is known about the influence of water temperature and velocity on the migration and spawning success of an inland population of Chinook salmon oncorhynchus tshawytscha.
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