Effects of Regulated Flows on Standing Crops of Juvenile Salmon and other Fishes at Barrows Stream, Maine

Autor: Keith A. Havey
Rok vydání: 1974
Předmět:
Zdroj: Transactions of the American Fisheries Society. 103:1-9
ISSN: 1548-8659
0002-8487
Popis: Mean standing crop of 5 brood years of age 0+ salmon prior to regulation of stream flows was estimated for each kg of female spawners/ha. Estimate was 20.1 fish/ha weighing 0.035 kg. Mean standing crop of 5 brood years of age 0+ salmon for each kg of female spawners following flow regulation was 39.0 fish/ha weighing 0.088 kg. The estimates are not significantly different at the 95% confidence level but are at the 70% confidence level. Mean standing crop of 5 brood years of 10–15 cm age I+ salmon prior to regulation of stream flows was estimated for each age 0+ salmon/ha and for each kg of age 0+ salmon/ha of the same brood years. So measured each age 0+ salmon produced 0.0040 kg of age I+ salmon and each kg of age 0+ salmon produced 1.876 kg of age I+ salmon. For 4 brood years of 10–15 cm age I+ salmon following flow regulation each age 0+ salmon produced 0.0029 kg of age I+ salmon and each kg of age 0+ salmon produced 1.115 kg of age I+ salmon. Differences for before and after flow regulation a...
Databáze: OpenAIRE
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