Abstract
The life history and feeding habits of Pontoporeia affinis Lindström were studied in mesotrophic Lake Erken during 1982 to 1983. The greatest densities and biomasses of P. affinis occurred at 12 m (662 ind./m2 and 118.2 mg dw/m2, respectively) with values decreasing at the shallower and deeper regions. The life cycle of Pontoporeia was one year, with recruitment occurring in April, at which time the majority of the population consisted of individuals <2 mm. Overall the gut content of Pontoporeia was predominantly composed of detritus (97.6%) with algae accounting for 2.3%. Annual production was highest at 12 m (386.2 mg dw/m2) and lowest at 16 m (8.1). The highest production occurred during September, coinciding with the autumn Bacillariophyceae bloom.
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Johnson, R.K. The life history, production and food habits of Pontoporeia affinis Lindström (Crustacea: Amphipoda) in mesotrophic Lake Erken. Hydrobiologia 144, 277–283 (1987). https://doi.org/10.1007/BF00005562
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DOI: https://doi.org/10.1007/BF00005562