2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 2:45 PM - 3:00 PM | JUVENILE CHINOOK SALMON: A NEED FOR POPULATION AND LIFE STAGE-SPECIFIC BIOENERGETICS MODELS? | 306C
JUVENILE CHINOOK SALMON: A NEED FOR POPULATION AND LIFE STAGE-SPECIFIC BIOENERGETICS MODELS?
Growth of juvenile salmonids is a critical variable affecting survival and recruitment to successive stages. Consumption and temperature are key variables affecting growth for fishes in general. Growth is an ideal indicator of habitat suitability, which is very informative for river restoration projects. We focus on juvenile Chinook Salmon in the San Joaquin River Restoration Program, which represents the southern-most Chinook Salmon run. We used meta-analyses of growth rates, simulations with inSTREAM and bioenergetics models to compare observed growth rates across populations from various sources. We also use bomb calorimetry data to directly measure juvenile energy densities and very discrete levels of habitat temperatures to improve bioenergetic model accuracy. Results from these multiple lines of evidence suggest that juvenile Chinook Salmon growth rates in southern rivers are quite robust. The scope for growth and consumption rates differ by ~35% by using direct versus published energy densities of juveniles. Further, temperatures in the restoration reach varied by as much as 10C during the rearing season, which greatly affects the estimated consumption rates of prey, which is valuable for establishing the carrying capacity of the restoration reach.
- C02 Fish and Other Aquatic Vertebrates
- C14 Hydroecology
- C02 Fish and Other Aquatic Vertebrates
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Presenters/Authors
Steve Blumenshine
(), Fresno State University, sblumens@csufresno.edu;
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Skylar Nguyen
(), Fresno State University, huyentnguyen@mail.fresnostate.edu;
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Taylor Spaulding
(), Fresno State University, tspaulding@mail.fresnostate.edu;
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