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Dynamics of egg production in Mediterranean populations of the terebellid polychaete Eupolymnia nebulosa

AuthorsNozais, Christian; Martin, Daniel ; Cha, Jae-Hoon; Duchêne, Jean Claude; Charles, F.; Grémare, Antoine
Issue Date1997
PublisherCambridge University Press
CitationJournal of the Marine Biological Association of the United Kingdom 77 : 1027-1043 (1997)
AbstractThe dynamics of egg production by a Mediterranean population of the terebellid polychaete Eupolymnia nebulosa was assessed both in the field and in the Laboratory between 1992 and 1994. Our results comfirm the ocurrence of several peaks of jelly mass production at the population level. They show that such peaks result from the production of several broods per individual female (the number of produced broods increasing with female size). Jelly masses produced at the end of the breeding season tend to be smaller and to contain fewer eggs than those produced at the beginning of the breeding season. Worms produced significantly larger jelly masses in 1994 than in 1993 and 1992, without noticeable change in corresponding fecundities. The computation of temporal changes in eggs produced per unit of surface area in the cove of Paulilles shows that most of the eggs are produced during the first two peaks of jelly mass production. These results are discussed relative to the different hypotheses invoked to account for the occurrence of several spawnings in Mediterranean populations of E. nebulosa. It is concluded that no single explanation, such as the allometry constraint hypothesis or heterogeneity in oogenesis rates, can be retained.
Description17 páginas, 10 figuras, 1 tabla.
Publisher version (URL)http://dx.doi.org/10.1017/S0025315400038601
Appears in Collections:(CEAB) Artículos
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