Timescale of ovarian maturation in Notothenia coriiceps; evidence for a prolonged adolescent phase
Ovarian maturation in Notothenia coriiceps is known to include a period during which yolk deposition begins to take place. This ‘adolescent’ phase was thought originally to last for about 1 year. The results from a 2–year study at Signy Island indicate that this adolescent phase lasts for about 4 ye...
Published in: | Journal of Fish Biology |
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Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
1994
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Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/516027/ https://doi.org/10.1111/j.1095-8649.1994.tb01271.x |
Summary: | Ovarian maturation in Notothenia coriiceps is known to include a period during which yolk deposition begins to take place. This ‘adolescent’ phase was thought originally to last for about 1 year. The results from a 2–year study at Signy Island indicate that this adolescent phase lasts for about 4 years. There is also some evidence to indicate that not all sexually mature fish spawn each season. Two reproductive strategies are considered, one where adverse conditions are accompanied by a failure to spawn and an alternative where fecundity is controlled by the number of small oocytes which ripen. |
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