Temporal patterns of reproductive condition in the doughboy scallop, Chlamys (Mimachlamys) asperrima Lamarck, in Jervis Bay, Australia

Wayne A O'Connor; M P Heasman

Back

Temporal patterns of reproductive condition in the doughboy scallop, Chlamys (Mimachlamys) asperrima Lamarck, in Jervis Bay, Australia

Journal article

Open access

Peer reviewed

Temporal patterns of reproductive condition in the doughboy scallop, Chlamys (Mimachlamys) asperrima Lamarck, in Jervis Bay, Australia

Wayne A O'Connor and M P Heasman

Journal of Shellfish Research, Vol.15(2), pp.237-244

1996

Files and links (2)

pdf

PDF - Published Version678.22 kBDownload View

Published VersionPDF - Published Version Open Access

url

http://www.bioone.org/loi/shreView

Webpage

Abstract

chlamys

gonosomatic index

macroscopic index

reproductive cycle

scallop

chlamys asperrima

bivalvia

doughboy scallop

reproductive condition

temporal pattern

temporal patterns

Australia

New South Wales

Jervis Bay

The broodstock reproductive condition of doughboy scallops. Chlamys (Mimachlamys) asperrima Lamarck, in Jervis Bay, Australia, was monitored fortnightly for 2 y. Gonosomatic index (GSI), gonad weight, and macroscopic gonadal appearance were used to assess changes in the reproductive status of the population. In common with C. asperrima in Tasmania, a winter- spring peak in reproductive activity was observed, although macroscopically ripe (mature, ready-to-spawn) individuals were present in most collections. Peaks in reproductive indices occurred in June and August 1992 and in September 1993, during which partial spawning was evident. Male and female development was synchronous, although female scallops maintained higher GSIs and macroscopically higher levels of gonadal development and, at their reproductive peak, had higher calorific values for gonadal tissue. Female gonads were also consistently heavier than those of equivalent- sized males, although adductor muscle weight in males was on average 9% heavier than that of females. Observations of reproductive condition indicate that although the optimal times for the harvest of C. asperrima in Jervis Bay are likely to be similar to that of southern stocks, the presence of reproductively capable individuals at most times of the year in Jervis Bay could be of advantage in the hatchery production of the species and in the provision of embryos for ecotoxilogical studies.

Details

Title: Temporal patterns of reproductive condition in the doughboy scallop, Chlamys (Mimachlamys) asperrima Lamarck, in Jervis Bay, Australia
Authors: Wayne A O'Connor (Author)
M P Heasman (Author)
Publication details: Journal of Shellfish Research, Vol.15(2), pp.237-244
Publisher: National Shellfisheries Association, Inc.
Date published: 1996
ISSN: 0730-8000
Organisation Unit: University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
Language: English
Record Identifier: 99450583002621
Output Type: Journal article

Metrics

48 File views/ downloads

666 Record Views