Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/9350
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Photoperiod effects on the expression of kisspeptin and gonadotropin genes in Atlantic cod, Gadus morhua, during first maturation
Authors: Cowan, Mairi
Davie, Andrew
Migaud, Herve
Contact Email: herve.migaud@stir.ac.uk
Keywords: Atlantic cod
Kisspeptin
Brain
Maturation
Continuous light
Issue Date: Sep-2012
Publisher: Elsevier
Citation: Cowan M, Davie A & Migaud H (2012) Photoperiod effects on the expression of kisspeptin and gonadotropin genes in Atlantic cod, Gadus morhua, during first maturation, Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology, 163 (1), pp. 82-94.
Abstract: In order to investigate the potential role of the kisspeptin system in the entrainment of reproduction in Atlantic cod, qPCR assays were developed for kiss2 and its receptor kissr4. mRNA expression was monitored in the brain over a full reproductive cycle in 2 populations of males and females: 1) a maturing population (exposed to simulated natural photoperiod, SNP) and 2) a maturation inhibited population (exposed to constant light, LL). Pituitary expression of gonadotropin subunit mRNA (fshβ and lhβ) was also measured. Results from this study indicated no clear temporal pattern in expression of kiss2 or kissr4 mRNAs in either population of cod, however acute elevations were apparent in maturing (SNP) individuals, namely an elevation in kiss2 in vitellogenic females and spermiating males and spikes in kissr4 during early vitellogenesis in females and spermatogenesis in males. Gonadotropin mRNA expression displayed strong amplitudinal changes over time with fshβ and lhβ mRNA expression increasing towards spawning in maturing individuals. No firm conclusions on the role of the kisspeptin system in cod puberty can be drawn at this stage, however mRNA increases in kiss2 and kissr4 may elude to conserved kisspeptin functions in cod and opens up interesting avenues on potential gender specific functions.
Type: Journal Article
URI: http://hdl.handle.net/1893/9350
DOI Link: http://dx.doi.org/10.1016/j.cbpa.2012.05.191
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Aquaculture (Machrihanish)
Aquaculture
Aquaculture

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