Maturity of female cod in Divisions 2J+3KL with a comparison of fish from inshore and offshore Division 3L
This study presents the time series for estimates of proportion mature-at-age for Divi-sions 2J+3KL female cod (Gadus morhua) from 1981 to January 1996. The observed pro-portion mature-at-age are presented in each year for each Division. The proportion of ma-ture fish-at-age has been increasing in a...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1997
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.565.3366 http://archive.nafo.int/open/studies/s29/morgan.pdf |
| Summary: | This study presents the time series for estimates of proportion mature-at-age for Divi-sions 2J+3KL female cod (Gadus morhua) from 1981 to January 1996. The observed pro-portion mature-at-age are presented in each year for each Division. The proportion of ma-ture fish-at-age has been increasing in all Divisions and in the stock as a whole, with the increase being greatest since the early-1990s. As a result, the estimated age at 50 % matu-rity has decreased from over 6 years to a low of 4.86 years in the most recent 2 years. A comparison of proportion mature-at-age and length in the surveyed area in Div. 3L in au-tumn 1995 with data from western Trinity Bay does not show a significant difference be-tween the two areas. Key words: female cod (Gadus morhua), maturity-at-age, maturity-at-length |
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