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Thermal dynamics of ovarian maturation in Atlantic cod 1 ( Gadus morhua ) 2 3
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kjesbu, Olav Sigurd Righton, David Krüger-Johnsen, Maria Anders Thorsen Michalsen, Kathrine Fonn, Merete Witthames, Peter R. |
| Copyright Year | 2010 |
| Abstract | The timing and success of spawning in marine fish is of fundamental 21 importance to population persistence, distribution and, for commercial species, 22 sustainability. Their physiological processes of reproduction are regulated, in part, by 23 water temperature, and therefore changes in marine climate may have dramatic effects 24 upon spawning performance. Using Atlantic cod (Gadus morhua) as a case study, we 25 examined the links between water temperature, vitellogenesis and spawning time by 26 conducting extensive laboratory and field studies. Our experiments documented that 27 vitellogenesis generally starts at autumnal equinox, and that oocyte growth and 28 investment is greater in cod held at warmer temperatures. Furthermore, spawning 29 occurred earlier when oocyte growth was more rapid. The experimental results were 30 confirmed by measurements of oocyte growth collected from wild caught cod in 31 northern (Barents Sea) and southern (Irish and North Seas) populations. A model of 32 oocyte maturation was successfully developed to explain the results. This model was 33 consistent with published egg production curves of cod from the Barents Sea, North 34 and Irish Seas, considering in situ temperatures recorded by individual data-storage 35 tags on cod in those areas. These findings have considerable relevance for 36 future studies of fish recruitment in relation to climate change. 37 38 39 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://brage.bibsys.no/xmlui/bitstream/handle/11250/108908/Kjesbu+et+al_revised_2_CJFAS.pdf?sequence=3 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
