Life cycle and production of Skwala parallela (Frison) (Plecoptera: Perlodidae) in a Colorado montane stream

Robert A. Short; James V Ward

Treesearch

Life cycle and production of Skwala parallela (Frison) (Plecoptera: Perlodidae) in a Colorado montane stream

Formally Refereed

Authors:

Robert A. Short, James V Ward

Year:

1980

Type:

Scientific Journal

Station:

Rocky Mountain Research Station

Source:

Hydrobiologia. 69(3): 273-275.

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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.

Keywords

Skwala parallela, perlodid stonefly, univoltine, annual production

Citation

Short, Robert A.; Ward, James V. 1980. Life cycle and production of Skwala parallela (Frison) (Plecoptera: Perlodidae) in a Colorado montane stream. Hydrobiologia. 69(3): 273-275.