The distribution,life cycle and production of Leptophlebia vespertina (L.) (Ephemeroptera) in a lowland lake |
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Authors: | A A Savage |
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Institution: | (1) Crewe & Alsager College of Higher Education, Crewe Road, CW1 1DU Crewe, Cheshire, England |
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Abstract: | Oak Mere, the water body studied, is a moderately productive base-poor lowland lake. It has zones of submerged marginal vegetation
growing on sand at the south-west end and on peat at the north-east end. The distributions of L. vespertina and other macroinvertebrates are described in relation to these two distinct areas. Laboratory experiments on behaviour and
survival are described in an attempt to explain the patterns of distribution. The seasonal distribution, variations in population
density, spatial distribution variance in relation to mean density, life cycle, length-weight relationship, growth and biomass
of L. vespertina are then described during two years at the sandy south-west end. The data are used to estimate annual production. Distribution,
life cycle, growth and production are compared with populations in water bodies of lower conductivity in the British Isles
and Scandinavia. |
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Keywords: | macroinvertebrates life cycle distribution production predation temperature |
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