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Characterization of oocyte development in hatchery-reared burbot


Foltz, JR and Jensen, NR and Polinski, MP and Ireland, SC and Cain, KD, Characterization of oocyte development in hatchery-reared burbot, North American Journal of Aquaculture, 74, (2012) pp. 408-412. ISSN 1522-2055 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 American Fisheries Society

DOI: doi:10.1080/15222055.2012.676001


Burbot Lota lota are an emerging aquaculture species. To aid in predicting the natural and hormonal-manipulated timing of ovulation and for ensuring maximum viability of eggs at spawning, this study describes oocyte maturation of hatchery-reared burbot from vitellogenesis through ovulation. At a temperature of 4°C, visual polarization of the oil globule occurred 7–13 d preovulation. The lack of uniformity in individual oocyte development was observed and persisted until approximately 2 d before ovulation, at which point complete polarizationwas observed in all oocytes and a condensed blastomere was observed along the inner chorion. These preliminary observations imply that implantation of gonatotropinreleasing hormone (GnRH) decreased the final maturation stage of oocyte development by 2–4 d and may aid in initiating the maturation process, the induction of which appeared to be a threshold for either a female’s progression to ovulation or nonovulation and atresia. Although additional investigation may be needed to fully maximize egg fertilization success and optimize timing related to intensive spawning practices, this study lays a foundation for further investigations and provides a reference for assessing oocyte development and predicting ovulation for this species.

Item Details

Item Type:Refereed Article
Keywords:Kootenai River, preservation, growth, stage, eggs, fish
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture crustaceans (excl. rock lobster and prawns)
UTAS Author:Polinski, MP (Mr Mark Polinski)
UTAS Author:Cain, KD (Associate Professor ken Cain)
ID Code:82867
Year Published:2012
Web of Science® Times Cited:2
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2013-02-20
Last Modified:2015-02-23

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