POPULATION-DYNAMICS OF MAGELLANIA-FRAGILIS, A BRACHIOPOD DOMINATING A MIXED-BOTTOM MACROBENTHIC ASSEMBLAGE ON THE ANTARCTIC SHELF

被引：44

作者：

BREY, T ^{[1
]}

PECK, LS ^{[1
]}

GUTT, J ^{[1
]}

HAIN, S ^{[1
]}

ARNTZ, WE ^{[1
]}

机构：

[1] BRITISH ANTARCTIC SURVEY,CAMBRIDGE CB3 0ET,ENGLAND

来源：

JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM | 1995年 / 75卷 / 04期

关键词：

D O I：

10.1017/S0025315400038200

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

A dense assemblage of the brachiopod Magellania fragilis was sampled by trawl and underwater photography during the expedition ANT IX/3 (1991) of RV 'Polarstern' on the shelf of the Lazarev Sea, Antarctica. Mean abundance and biomass estimates for M. fragilis were 26.15 individuals m(-2) and 1.13 g AFDM m(-2), respectively. Growth bands visible on the shell were interpreted as annual growth marks caused by the strong seasonality of food input to the benthos and were treated as size-at-age data. The von Bertalanffy growth function L(t) (mm) = 51.67 (1 - e-(0.020 (t+1.326)))(0.828) described these data best. The annual somatic PIE ratio was very low, 0.046 y(-1), and annual production amounted to 0.052 g AFDM m(-2) y(-1) at this particular site. These results indicate that M. fragilis is a comparatively slow-growing species with very low annual productivity.

引用

页码：857 / 869

页数：13

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