HR: 11:00h
AN: NB22D-03    [Abstracts]
TI: Water Temperature, Invertebrate Drift, and the Scope for Growth for Juvenile Spring Chinook Salmon.
AU: * Lovtang, J C
EM: jens.lovtang@oregonstate.edu
AF: Oregon State University Department of Fisheries and Wildlife, 104 Nash Hall, OSU, Corvallis, OR 97331 United States
AU: Li, H W
EM: hiram.li@oregonstate.edu
AF: USGS - BRD, Oregon Cooperative Fisheries Research Unit, Department of Fisheries and Wildlife, Oregon State University, 104 Nash Hall, OSU, Corvallis, OR 97331 United States
AB: We present a bioenergetic assessment of habitat quality based on the concept of the scope for growth for juvenile Chinook salmon. Growth of juvenile salmonids during the freshwater phase of their life history depends on a balance between two main factors: energy intake and metabolic costs. The metabolic demands of temperature and the availability of food play integral roles in determining the scope for growth of juvenile salmonids in stream systems. We investigated differences in size of juvenile spring Chinook salmon in relation to water temperature and invertebrate drift density in six unique study reaches in the Metolius River Basin, a tributary of the Deschutes River in Central Oregon. This project was initiated to determine the relative quality and potential productivity of habitat in the Metolius Basin prior to the reintroduction of spring Chinook salmon, which were extirpated from the middle Deschutes basin in the early 1970's due to the construction of a hydroelectric dam. Variations in the growth of juvenile Chinook salmon can be described using a multiple regression model of water temperature and invertebrate drift density. We also discuss the relationships between our bioenergetic model, variations of the ideal free distribution model, and physiological growth models.
UR: http://www.oregonstate.edu/~lovtangj
DE: 9810 New fields (not classifiable under other headings)
DE: 9901 NABS Student Award - Basic Research
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly