Energy Budget for a Stream Population of the Freshwater Clam, Sphaerium Striatinum Lamarck ( Bivalvia: Pisidiidae).

Document Type

Article

Publication Date

1-1-1984

Publication Source

Canadian Journal of Zoology

Abstract

Annual productivity (P) was 2.79 g C.m-2.yr-1, average standing crop biomass (B) 0.58 g C.m-2; the resulting annual P:B ratio of 4.58 is below that expected for a bivoltine animal. The low value for reproductive effort (Re:P = 16.1%) may partially be attributed to the ovoviviparous, iteroparous nature of this population. A strategy of partitioning a large proportion of production to growth (G:P= 83.9%) may insure a high probability of attaining the minimum size necessary for reproduction. Production accounts for 44% of assimilation (A) with 56% of A lost through respiration. The net production efficiency (P:A= 44%) is high and indicates that this population is efficient in partitioning energy to growth and reproduction. The population must consume 10.57 g C.m-2.yr-1 to meet its energy needs. Only 35% of this could be accounted for by filter feeding; the remainder may have come from deposit feeding. This population of S. striatinum is one of the most productive and efficient in its energy partitioning of populations studied to date.

ISBN/ISSN

ISSN (PRINT): 0008-4301; ISSN (ELECTRONIC): 1480-3283

Comments

The Canadian Journal of Zoology is affiliated with the Canadian Society of Zoologists.

Publisher

Canadian Science Publishing

Volume

62

Peer Reviewed

yes

Issue

12

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