Abstract
A modification of the Hynes' method was used to estimate production of Potamothrix alatus paravanicus Poddubnaya & Pataridze (Tubificidae), the dominant species of benthic invertebrate in Lake Sevan. Maximum production (5–24 g mt\-2 wet weight) occurred in the sublittoral, while maximum biomass was found (8–17 g m−2 wet weight) in the profundal. The turnover ratio of the ‘average cohort’ varied between 2.4 and 5.0. The annual turnover ratio (P/B) decreased from 2.1–3.1 in the littoral to 0.1–0.4 in the profundal zone.
A logarithmic correlation was found between P/B and temperature and oxygen regime, and depth and average size of clitellate specimens.
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Jenderedjian, K. Influence of environmental factors on the production of Potamothrix alatus paravanicus Poddubnaya & Pataridze (Tubificidae) in different areas of Lake Sevan. Hydrobiologia 278, 287–290 (1994). https://doi.org/10.1007/BF00142337
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DOI: https://doi.org/10.1007/BF00142337