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Histological examination of final oocyte maturation and atresia in wild and domesticated Penaeus monodon (Fabricius) broodstock

2005; Wiley; Volume: 36; Issue: 7 Linguagem: Inglês

10.1111/j.1365-2109.2005.01271.x

1365-2109

Sílvio Peixoto, Greg J. Coman, Stuart Arnold, Peter J. Crocos, Nigel Preston,

Animal Genetics and Reproduction

Aquaculture ResearchVolume 36, Issue 7 p. 666-673 Histological examination of final oocyte maturation and atresia in wild and domesticated Penaeus monodon (Fabricius) broodstock Sílvio Peixoto, Sílvio Peixoto Lab. Maricultura, Dep. Oceanografia, Fundação Universidade Federal do Rio Grande, Rio Grande, BrazilSearch for more papers by this authorGreg Coman, Greg Coman CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorStuart Arnold, Stuart Arnold CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorPeter Crocos, Peter Crocos CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorNigel Preston, Nigel Preston CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this author Sílvio Peixoto, Sílvio Peixoto Lab. Maricultura, Dep. Oceanografia, Fundação Universidade Federal do Rio Grande, Rio Grande, BrazilSearch for more papers by this authorGreg Coman, Greg Coman CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorStuart Arnold, Stuart Arnold CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorPeter Crocos, Peter Crocos CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this authorNigel Preston, Nigel Preston CSIRO Marine Research, Cleveland, Qld, AustraliaSearch for more papers by this author First published: 24 March 2005 https://doi.org/10.1111/j.1365-2109.2005.01271.xCitations: 25 Correspondence: S Peixoto, Lab. Maricultura, Dep. Oceanografia, Fundação Universidade Federal do Rio Grande, C.P. 474, 96201-900 Rio Grande, RS, Brazil. E-mail: silviop@mikrus.com.br Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Oocyte maturation and gonadosomatic index (GSI) of eyestalk ablated Penaeus monodon females collected from the wild and from two first-generation domesticated lines were assessed. Frequency and diameter of the different oocytes, and the intensity of oocyte atresia, were compared among groups through histological assessments of the sections of the middle ovarian lobe. Digitized images from ovary sections were used to record the frequency and diameter of different oocyte types. Spawning performance of the three groups were expressed in terms of the percentage of females that spawned at least once (productive females), time from eyestalk ablation to first spawning (latency period) and the number of spawnings per female stocked. Final ovarian maturation was attained in all groups, as indicated by the presence of mature oocytes with cortical rods (cortical oocytes), dark-green ovarian colour and high GSI values (5.83–6.86%). However, domesticated groups presented significant larger immature oocyte types (previtellogenic and yolky oocytes) and smaller cortical oocytes compared with wild females, indicating a reduced vitellogenic activity during final oocyte maturation. Additionally, the frequency of atresia was comparatively higher for both domesticated groups, which could be related to their inferior spawning performance. The implications of these results on the reproductive potential and development of domesticated P. monodon are discussed. Citing Literature Volume36, Issue7May 2005Pages 666-673 RelatedInformation