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.

 
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Bibliographic Data

Short Form
Harriott, 1982, Aust. Mus. Mem. 16: 53–66
Author
Vicki Harriott
Year
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
/Uploads/Journals/17588/358.enw
Title Page
/Uploads/Journals/17588/358.pdf
File size: 115kB
Complete Work
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