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Genetic and meristic variation in black and smooth oreos in the New Zealand Exclusive Economic Zone
Smith, P.J.; McMillan, P.J.; Bull, B.; McVeagh, S.M.; Gaffney, P.M.; Chow, S. (2002). Genetic and meristic variation in black and smooth oreos in the New Zealand Exclusive Economic Zone. N.Z. J. Mar. Freshwat. Res. 36: 737-750
In: New Zealand Journal of Marine and Freshwater Research. Royal Society of New Zealand: Wellington. ISSN 0028-8330; e-ISSN 1175-8805
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| Auteurs | | Top |
- Smith, P.J.
- McMillan, P.J.
- Bull, B.
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- McVeagh, S.M.
- Gaffney, P.M.
- Chow, S.
|
|
| Abstract |
Meristic and genetic methods were used to determine the stock relationships of black Allocytus niger (James, Inada & Nakamura, 1988) and smooth oreo Pseudocyttus maculates (Gilchrist, 1906) in the New Zealand Exclusive Economic Zone (EEZ). Samples were collected from four management areas—OEO 1 (south-west), OEO 3A (Chatham Rise west), OEO 4 (Chatham Rise east), and OEO 6 (subantarctic) during the 1998 October- December spawning period. Lateral line scale counts and pyloric caeca counts revealed differences between black oreo samples from OEO 6 and the other three OEO management areas. Lateral line scale counts in smooth oreo showed no significant differences between areas. Genetic analyses of four non-coding regions of nuclear DNA and mitochondrial (mt) DNA haplotypes in black oreo showed no significant differentiation among the four management areas. Likewise for smooth oreo, genetic analyses of five non-coding regions of nuclear DNA and mtDNA haplotypes showed no overall regional differentiation, although there was weak evidence at one locus for a difference between OEO 3A and OEO 6. The data do not reject the null hypothesis of a single genetic stock in New Zealand waters, and are typical of marine species with long pelagic juvenile stages. |
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