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

✍ Scribed by Robert A. Short; James V. Ward

• Book ID: 104622446
• Publisher: Springer
• Year: 1980
• Tongue: English
• Weight: 215 KB
• Volume: 69
• Category: Article
• ISSN: 1573-5141
• DOI: 10.1007/bf00046803

✦ Synopsis

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/m 2 occurred in July . Based upon the instantaneous growth method, annual production was 395 .3 mg/ -'or 3 .95 kg/ ha dry weight with a P/ B ratio of 4 .4