Biomass estimates of freshwater zooplankton from length-carbon regression equations

Submitted: 10 December 2011
Accepted: 10 December 2011
Published: 1 February 2000
Abstract Views: 2751
PDF: 1253
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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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MANCA, Marina, and Patrizia COMOLI. 2000. “Biomass Estimates of Freshwater Zooplankton from Length-Carbon Regression Equations”. Journal of Limnology 59 (1):15-18. https://doi.org/10.4081/jlimnol.2000.15.

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