Life cycle and production of Skwala parallela (Frison) (Plecoptera: Perlodidae) in a Colorado montane stream |
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| Authors: | Robert A. Short James V. Ward |
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| Affiliation: | (1) Department of Zoology and Entomology, Colorado State University, 80523 Fort Collins, Colorado, USA;(2) Department of Zoology and Entomology, Colorado State University, 80523 Fort Collins, Colorado, U.S.A. |
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| Abstract: | The life cycle and production of Skwala parallela, a perlodid stonefly, was investigated in a third-order Colorado montane stream. The species exhibited a univoltine life cycle with a distinct cohort. Small nymphs appeared in May. Rapid growth was exhibited throughout summer and autumn. During winter, growth slowed somewhat but was continuous until April. Maximum density of 34 nymphs/m2 occurred in July. Based upon the instantaneous growth method, annual production was 395.3 mg/m2 or 3.95 kg/ha dry weight with a P/B ratio of 4.4 |
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| Keywords: | Colorado life cycle production Skwala parallela stream benthos |
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