Egg development and lifecycle timing in the noble crayfish (Astacus astacus) |
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| Affiliation: | 1. Université de Lyon, Laboratoire de Biométrie et Biologie Evolutive, UMR 5558 CNRS, Université Claude Bernard Lyon 1, Villeurbanne cedex, France;2. Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersand, 7 York Roak, Parktown, Johannesburg 2193, South Africa;3. Université de Lyon, Laboratoire d''Ecologie des Hydrosystèmes Naturels et Anthropisés, UMR 5023 CNRS, Université Claude Bernard Lyon 1, ENTPE, Villeurbanne cedex, France;1. Department of Animal Sciences, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch 7602, South Africa;2. Agricultural Research Council of South Africa, Private Bag X2, Irene 0062, South Africa |
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| Abstract: | Egg development time in Astacus astacus was strongly influenced by temperature. Five batches of eggs were subjected to different temperature regimes after approximately 600 degree days and, by increasing the temperature, the total number of degree days to hatching was reduced from 1900 to 1300. There were no systematic differences in hatching success or juvenile survival due to different temperature treatments. Females molted and rematured (50–100%) 4–8 weeks after hatching. |
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