In:
Canadian Journal of Zoology, Canadian Science Publishing, Vol. 64, No. 9 ( 1986-09-01), p. 1914-1919
Kurzfassung:
Samples of Mesodesma arctatum (Pelecypoda) were collected during the summer of 1983 in the subtidal zone of the Saint-Jean River delta, on the north shore of the Gulf of St. Lawrence. Age was estimated by counting successive growth lines. Maximum longevity was estimated to be about 24 years. The von Bertalanffy growth equation was L t = 48.1 (1−e −0,23(t−0,53) ) mm. The instantaneous mortality rate was 0.26, estimated from a log regression of abundance versus age. The theoretical evolution of a single cohort was calculated; according to the model, biomass, expressed in dry weight, reached its maximum at 6 years and the ratio of somatic production to biomass was estimated to be 0.27. The age at first reproduction is between 3 and 4 years. The reproductive period seems to be during July. The reproductive effort was calculated from the weight difference between the reproductive and postreproductive periods and was determined to be 47% of the total production of the cohort.
Materialart:
Online-Ressource
ISSN:
0008-4301
,
1480-3283
Sprache:
Englisch
Verlag:
Canadian Science Publishing
Publikationsdatum:
1986
ZDB Id:
1490831-1
SSG:
12
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