Abstract
Egg production by Undinula vulgaris, collected off Kaneohe Bay, Hawaii, was measured under field and laboratory conditions on 16 occasions from June to December 1991. In situ rates ranged from 0 to 15.7 eggs female-1 d-1, with a mean of 6.4 eggs female-1 d-1, 2.1% female body carbon d-1. Maximum in situ production was 53 eggs female-1 d-1, 17.2% C d-1. Average egg production (Y, eggs female-1 d-1) was related to the concentration of particulate carbon (X, μg C l-1) by the Ivlev function, Y=13.9[1-e-0.0097 (x-10)], with R 2=0.96. Individuals with the same feeding history produced more eggs at lower temperatures in the laboratory. Egg production was not significantly correlated with dry weight, and no noticeable temporal trend was found. Despite the elevated habitat temperatures (26 to 27°C) of this subtropical copepod, maximum fecundity of U. vulgaris was comparable to, but average rates were lower than, egg production rates of similarly-sized, temperate and borcal species of the genus Calanus. Our results caution against broad extrapolations of the temperature-growth relationship for temperate coastal copepods to species from poorly studied, oligotrophic regions of the oceans.
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Contribution No. 3257 from the School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
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Park, C., Landry, M.R. Egg production by the subtropical copepod Undinula vulgaris . Marine Biology 117, 415–421 (1993). https://doi.org/10.1007/BF00349317
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DOI: https://doi.org/10.1007/BF00349317