Synchronous oogenesis during the semilunar spawning cycle of the tropical abalone Haliotis asinina

Jebreen, E. J., Counihan, R. T., Fielder, D. R. and Degnan, B. M. (2000) Synchronous oogenesis during the semilunar spawning cycle of the tropical abalone Haliotis asinina. Journal of Shellfish Research, 19 2: 845-851.


Author Jebreen, E. J.
Counihan, R. T.
Fielder, D. R.
Degnan, B. M.
Title Synchronous oogenesis during the semilunar spawning cycle of the tropical abalone Haliotis asinina
Journal name Journal of Shellfish Research
ISSN 0075-5711: 0730-8000
Publication date 2000-01-01
Sub-type Article (original research)
Volume 19
Issue 2
Start page 845
End page 851
Total pages 7
Editor S.E. Shumway
Place of publication USA
Publisher National Shellfisheries Association, Inc
Language eng
Subject C1
270500 Zoology
780105 Biological sciences
300703 Aquaculture
630300 Fish
Abstract On the southern Great Barrier Reef, Haliotis asinina (Vetigastropoda: Pleurotomarioidea) synchronously spawn every 2 wk in a predictable fashion. allowing detailed analysis of reproduction, gametogenesis, and gonad development. Histological examination of the ovaries of members of the Heron Reef population during this semilunar cycle reveals that oogenesis is also synchronous and predictable, and requires more than two spawning cycles (i.e. >28 days) to complete. Shortly after a spawning event the ovary comprises two cohorts of primary oocytes, one of which will be released at the next spawning event, and clusters of oogonia. At this time there is a rapid proliferation and expansion of trabeculae, germinal epithelial, and oogonia, and a dramatic increase in the size of the vitellogenic oocytes to be: spawned at the next spawning event. Within 4 days these oocytes have filled the ovary. On the day of the next spawning a lumen forms in the ovary as a result of localized degradation of trabeculae. The large primary oocytes dissociate from the receding trabeculae. initiate maturation, and accumulate in the lumen; these oocytes become embedded in a jelly coat layer. The next cohort of oocytes remain attached to the trabeculae. The jelly coat appears to be completely dissolved within 30 min of spawning. Comparison of the oogenesis and ovary development in II. asinina with other abalone species indicates that these processes are very similar in tropical and temperate abalone. This suggests that insights into the regulation of reproduction and spawning in H. asinina are likely to be applicable to other haliotids.
Keyword Fisheries
Marine & Freshwater Biology
Gametogenesis
Gastropod
Germinal Vesicle
Haliotid
Spawning Cycle
New-zealand
Reproduction
Gastropoda
Iris
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Mon, 13 Aug 2007, 22:08:35 EST