作者: Curtis A. Knight , Rick W. Orme , David A. Beauchamp
DOI: 10.1577/1548-8659(1999)128<0553:GSAMPO>2.0.CO;2
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摘要: Abstract Adfluvial Bonneville cutthroat trout Oncorhynchus clarki utah were introduced into Strawberry Reservoir after a rotenone treatment in 1990. Naturally reproduced fry either migrated to the reservoir immediately emergence (migrants) or remained tributaries for 1–2 years (nonmigrants). In 1995, emerged from mid-August early September. Migrants moved downstream almost exclusively between 2100 and 0300 hours. always same size as newly fry, whereas mean of nonmigrant increased throughout period. Most followed strategy. Nonmigrant grew 0.12 g (26 mm) at an average 1.2 (50 by November. Mean densities low-velocity microhabitats along stream margins ranged 5.5 11.0 fry/m2 during 6 weeks first emergence. focal point velocity was 3.3 cm/s (SD = 1.4, N 42) depth 11.8 cm (SD...