In:
Antarctic Science, Cambridge University Press (CUP), Vol. 3, No. 3 ( 1991-09), p. 251-256
Abstract:
Sterechinus antarcticus inhabits the shelf and the slope of the Weddell Sea and is the predominant echinoid between 450 and 1200 m. Growth lines visible in the half pyramids of the Aristotle's lantern were interpreted as annual growth marks. A Von Bertalanffy growth function was fitted to age-diameter data of 217 specimens (D ∞ = 82.4 mm, K = 0.017 y −1 , t 0 = 1.633 y). Based on 92 trawl samples, a representative size-frequency distriution of S. antarcticus was established. From the growth curve, the size-frequency sample and diameter - weight regressions, mortality and somatic productivity of S. antarcticus were calculated by a size-converted catch curve and the weight specific growth rate method. Gonadal productivity was estimated by an average value for reproductive output of cold water echinoderms. Mortality rate Z as'well as somatic P/B ratio amounted to 0.07 y −1 . Annual somatic production was estimated as 0.3 mg m −2 y −1 , and annual gonadal production as 0.25 mg m −2 y −1 between 100 and 1200 m (0.6 and 0.5 mg m −2 y −1 between 450 and 1200 m).
Type of Medium:
Online Resource
ISSN:
0954-1020
,
1365-2079
DOI:
10.1017/S0954102091000305
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1991
detail.hit.zdb_id:
2104104-0
detail.hit.zdb_id:
1009128-2
SSG:
12
SSG:
13
SSG:
14
