Variances of Vertebral Sample Frequencies in Atlantic Cod (Gadus morhua) of the Newfoundland and Adjacent Areas, 1947–71
Variances of frequencies of vertebral numbers from samples of cod (Gadus morhua) from the Northwest Atlantic showed significant differences between many cod populations of this area. Cod produced in areas with limited and low temperature range during egg and early larval development – such as in Wes...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.615.5127 http://archive.nafo.int/open/studies/s21/templema.pdf |
| Summary: | Variances of frequencies of vertebral numbers from samples of cod (Gadus morhua) from the Northwest Atlantic showed significant differences between many cod populations of this area. Cod produced in areas with limited and low temperature range during egg and early larval development – such as in West Greenland, offshore Canadian areas from Funk Island Bank northward on offshore banks and coastally in northern Labrador, on Flemish Cap, the southern Scotian Shelf, and Georges Bank – tend to have low variances, whereas the frequencies of cod vertebral numbers from the Grand Bank, St. Pierre Bank, Newfound-land coastal areas, and most other areas with later spawning and higher temperature range and higher temperatures during egg development typically have higher variances. Where two groups of cod with differing patterns of vertebral numbers intermingle, variances tend to be high. Chi-square calculations were used to show differences between groups of variances in many areas occupied by different or mixed stocks. |
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