Weight and time of onset of female-superior sexual dimorphism in pond reared Penaeus monodon

Gopal, Chavali, Gopikrishna, Gopalapillay, Krishna, Gopal, Jahageerdar, Shrinivas S., Rye, Morten, Hayes, Ben J., Paulpandi, Sivagnanam, Kiran, Remanibhaskaran P., Pillai, Subramaniapillai M., Ravichandran, Pitchaiyappan, Ponniah, Alphis G. and Kumar, Dilip (2010) Weight and time of onset of female-superior sexual dimorphism in pond reared Penaeus monodon. Aquaculture, 300 1-4: 237-239. doi:10.1016/j.aquaculture.2010.01.007


Author Gopal, Chavali
Gopikrishna, Gopalapillay
Krishna, Gopal
Jahageerdar, Shrinivas S.
Rye, Morten
Hayes, Ben J.
Paulpandi, Sivagnanam
Kiran, Remanibhaskaran P.
Pillai, Subramaniapillai M.
Ravichandran, Pitchaiyappan
Ponniah, Alphis G.
Kumar, Dilip
Title Weight and time of onset of female-superior sexual dimorphism in pond reared Penaeus monodon
Formatted title
Weight and time of onset of female-superior sexual dimorphism in pond reared Penaeus monodon
Journal name Aquaculture   Check publisher's open access policy
ISSN 0044-8486
1873-5622
Publication date 2010-02-27
Sub-type Letter to editor, brief commentary or brief communication
DOI 10.1016/j.aquaculture.2010.01.007
Open Access Status Not yet assessed
Volume 300
Issue 1-4
Start page 237
End page 239
Total pages 3
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
Crustacean females typically grow faster and achieve a larger size than males of the same age. This has implications for aquaculture of such species. Sexual dimorphism may warrant separating males and females during culture to ensure consistent harvest size shrimp from a pond, or in extreme cases mono-sex culture may be justified. We conducted an experiment to study the sex specific growth pattern of Peneaus monodon to determine extent of sexual dimorphism in growth and onset of sexual dimorphism. Shrimp were communally reared in two earthen ponds. One pond was for broodstock development at a low stocking density (7/m2) and the other was stocked at a commercial stocking density (9/m2). In the broodstock pond, females grew faster than the males after 70 days of culture and consistently maintained an average female-superior difference of 6-10 g. In the commercial pond onset of sexual dimorphism was at 90 days of culture, after which females grew faster than the males. In both pond types, the weight of shrimp at the onset of sexual dimorphism was similar, at 15-20 g. Therefore we conclude that weight is more important than age in determining onset of sexual dimorphism for growth in P. monodon. Females were approximately 8 g heavier than males in both ponds after 169 days of culture, so sexual dimorphism will be a major contributor to variation in harvest size if males and females are not reared separately.
Keyword Harvest weight
Sexual dimorphism
Shrimp
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Letter to editor, brief commentary or brief communication
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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