Journal article
Characterization of Oocyte Development in Hatchery‐Reared Burbot
North American journal of aquaculture, Vol.74(3), pp.408-412
07/2012
Handle:
https://hdl.handle.net/2376/115993
Abstract
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 polarization was observed in all oocytes and a condensed blastomere was observed along the inner chorion. These preliminary observations imply that implantation of gonatotropin‐releasing 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.
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Details
- Title
- Characterization of Oocyte Development in Hatchery‐Reared Burbot
- Creators
- John R Foltz - University of IdahoNathan R Jensen - U.S. Geological Survey, Upper Midwest Environmental Sciences CenterMark P Polinski - University of TasmaniaSusan C Ireland - Kootenai Tribe of IdahoKenneth D Cain - University of Idaho
- Publication Details
- North American journal of aquaculture, Vol.74(3), pp.408-412
- Academic Unit
- Center for Reproductive Biology
- Publisher
- Taylor & Francis Group
- Number of pages
- 5
- Grant note
- Kootenai Tribe of Idaho Bonneville Power Administration (30729; 37267; 198806400)
- Identifiers
- 99900547816101842
- Language
- English
- Resource Type
- Journal article