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Post-ovulatory egg viability in the snapper Pagrus auratus (Sparidae)


Hobby, AC and Pankhurst, NW, Post-ovulatory egg viability in the snapper Pagrus auratus (Sparidae), Marine and Freshwater Research, 48, (5) pp. 385-389. ISSN 1323-1650 (1997) [Refereed Article]

DOI: doi:10.1071/MF96120


The role of gonadal steroids in maintaining post-ovulatory egg viability was investigated in the snapper (Pagrus auratus), a daily-repeat-spawning teleost. Ovulated eggs were held in vitro in L15 medium, or in L15 medium supplemented with gonadal steroids or gonadotrophin, to investigate any direct effects of reproductive hormones on post-ovulatory egg viability. The viability of eggs retained in the oviduct decreased with increasing time after ovulation, to give fertilization of below 50% after 6 h. The viability of eggs held in L15 medium was at least as good at that of eggs held in vivo. Storage of eggs in L15 medium supplemented with the reproductive hormones testosterone, 17α-hydroxyprogesterone, 17α,20β-dihydroxy-4-pregnen-3-one and human chorionic gonadotrophin did not improve or reduce viability relative to controls, suggesting that the hormones investigated have no direct effect on post-ovulatory egg viability.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Zoology not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Fisheries - aquaculture not elsewhere classified
UTAS Author:Hobby, AC (Mrs Andrea Cherie Hobby)
UTAS Author:Pankhurst, NW (Professor Ned Pankhurst)
ID Code:10904
Year Published:1997
Web of Science® Times Cited:8
Deposited By:TAFI - Aquaculture
Deposited On:1997-08-01
Last Modified:2011-08-11

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