Biomass estimates of freshwater zooplankton from length-carbon regression equations

Abstract

We present length/carbon regression equations of zooplankton species collected from Lake Maggiore (N. Italy) during 1992. The results are discussed in terms of the environmental factors, e.g. food availability, predation, controlling biomass production of particle- feeders and predators in the pelagic system of lakes. The marked seasonality in the length-standardized carbon content of Daphnia, and its time-specific trend suggest that from spring onward food availability for Daphnia population may be regarded as a simple decay function. Seasonality does not affect the carbon content/unit length of the two predator Cladocera Leptodora kindtii and Bythotrephes longimanus. Predation is probably the most important regulating factor for the seasonal dynamics of their carbon biomass. The existence of a constant factor to convert the diameter of Conochilus colonies into carbon seems reasonable for an organism whose population comes on quickly and just as quickly disappears.

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Published
2000-02-01
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Original Articles
Keywords:
carbon, body length, zooplankton
Statistics
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How to Cite
1.
MANCA M, COMOLI P. Biomass estimates of freshwater zooplankton from length-carbon regression equations. J Limnol [Internet]. 2000Feb.1 [cited 2020Nov.29];59(1):15-8. Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2000.15

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