Australian Museum Journal Papers from the Echinoderm Conference. 4. Sexual and asexual reproduction of Holothuria atra Jaeger at Heron Island Reef, Great Barrier Reef

Shortform:
Harriott, 1982, Aust. Mus. Mem. 16: 53–66
Author(s):
Harriott, Vicki
Year published:
1982
Title:
Papers from the Echinoderm Conference. 4. Sexual and asexual reproduction of Holothuria atra Jaeger at Heron Island Reef, Great Barrier Reef
Serial title:
Australian Museum Memoir
Volume:
16
Start page:
53
End page:
66
DOI:
10.3853/j.0067-1967.16.1982.358
Language:
English
Date published:
31 December 1982
Cover date:
31 December 1982
ISBN:
ISBN 0-7305-5743-6
ISSN:
0067-1967
CODEN:
AUNMA5
Publisher:
The Australian Museum
Place published:
Sydney, Australia
Subjects:
ECHINODERMATA; ECOLOGY
Digitized:
04 February 2009
Available online:
04 March 2009
Reference number:
358
EndNote package:
EndNote file
Title page:
Title page (115kb PDF)
Complete work:
Complete work (1259kb PDF)

Abstract

Holothuria atra is the most common epifaunal holothurian on the reef flat at Heron Island. The gonad maturation cycle of H. atra was followed using gonad index estimations and histological examination. Gonad samples were taken at intervals of 6 to 8 weeks for 18 months. Mature gonads occurred in most samples, and gonad maturity peaked twice; in early winter and in summer. Sex ratio of female to male animals was not significantly different from a 1:2 ratio. Sex ratio ranged from 1:8.5 in animals weighing less than 100 g, to 1:0.7 in those over 1,000 g. H. atra commonly reproduces asexually by transverse binary fission. In 21 samples, each of approximately 50 animals, 6% to 70% of individuals were detectable products of asexual reproduction. Occurrence of frequent asexual reproduction compounds difficulties in estimation of growth parameters from data such as size-frequency distributions and growth increments.

Last Updated: