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Distribution of Juvenile Bull Trout in a Thermal Gradient of a Plunge Pool in Granite Creek, Idaho
Author(s) -
Bonneau Joseph L.,
Scarnecchia Dennis L.
Publication year - 1996
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1996)125<0628:dojbti>2.3.co;2
Subject(s) - tributary , trout , juvenile , substrate (aquarium) , geology , hydrology (agriculture) , fishery , fish <actinopterygii> , environmental science , geography , oceanography , biology , ecology , geotechnical engineering , cartography
The distribution of juvenile bull trout Salvelinus confluentus was observed on three nights (0000–0200 hours) during July 24–28, 1992, in a large plunge pool in Granite Creek, a direct tributary to Lake Pend Oreille in northern Idaho. The pool contained a strong side‐to‐side thermal gradient (8–15°C) created by the confluence of Granite Creek (water temperature 15°C) with Sullivan Springs, a much colder (8°C) stream of comparable discharge. Juvenile bull trout chose the coldest water available (8–9°C). Distribution of bull trout within the plunge pool could not be attributed to differences in water depth, substrate, velocity, overhanging cover, or interactions with other fish.