Vogt G. 2014. Life span, early life stage protection, mortality and senescence in freshwater Decapoda. In: Yeo DCJ, Cumberlidge N, Klaus S (eds.), Advances in Freshwater Decapod Systematics and Biology (Crustaceana Monographs 19), pp. 17-51. Brill: Leiden. http://www.brill.com/products/book/advances-freshwater-decapod-systematics-and-biology
This article review the present knowledge on ageing and longevity in the freshwater Decapoda and examines the impact of abbreviated development and postembryonic brood care, two major adaptations to fresh water, on life expectancy. Life span data are available for only 4% of freshwater decapods. Reliably determined maximum life spans in freshwater shrimps, crayfish, crabs, and aeglids vary from 8 months to 38 years and may be underestimated in slow-growing species. Decapods that live at high latitudes and high altitudes tend to live longer, which may reflect life history adaptations to cool water temperatures. Particularly long-lived species are found among crayfish and in subterranean habitats. Abbreviated and direct development and postembryonic brood care reduce mortality of the early life stages of freshwater decapods and are associated with an increase of individual life expectancy but the longevity of freshwater decapod species is not extended when compared to marine decapods. Long-lived freshwater decapods maintain structural and functional integrity into old age and possess several effective anti-ageing mechanisms including life-long stem cell activity. The most obvious anti-ageing mechanisms are moulting and the regeneration of damaged appendages, both of which obviate mechanical senescence. Some species of freshwater decapods are suitable models for the investigation of general topics of biogerontology.
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