Longevity O F the Antarctic Krill ( Euphausia Superba Dana ) Based on a Laboratory Experiment
نویسنده
چکیده
Laboratory observations over a 6-year period were made on the intermoult period (IP), changes in body length (BL) and maturity of 3 female and 3 male krill brought from Antarctic water to Australia. While the IP was stable over the period (range of individual means; 25.6-29.6 days), both BL and maturity changed greatly from one specimen to the next. Reversible modes shown in BL and maturity suggest that neither parameter is a good indicator of chronological age in this animal. Considering the age of krill at the beginning of this experiment (least 1-2 year old) krill lived for 7-8 years, which is considerably longer than the previously hypothesized 2-5 year life span of this animal.
منابع مشابه
Palmer LTER: Grazing by the antarctic krill Euphausia superba on Nitschia sp. and Phaeocystis sp. monocultures
Figure 3. Cumulative frequency distribution of the mean krill bio mass (g nr2) of 1-km subsamples for the fast (solid line) and slow (dashed line) surveys. Cram, D.L., J.J. Agenbag, I. Hampton, and A.A. Robertson. 1979. SAS Protea Cruise, 1978: The general results of the acoustics and remote sensing study, with recommendations for estimating the abundance of krill {Euphausia superba Dana). Sout...
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