Development of deep-water redfish ( Sebastes mentella ) larvae, with comparative notes on newly extruded Acadian redfish ( Sebastes fasciatus ) from the Flemish Cap
Planktonic redfish larvae of the genus Sebastes were collected from Flemish Cap, an offshore Northwest Atlantic fishing bank east of the island of Newfoundland, Canada. A protocol based on discriminant function analysis and previously published age–length relationships was used to identify specimens...
| Published in: | Canadian Journal of Zoology |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1987
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/z87-182 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-182 |
| Summary: | Planktonic redfish larvae of the genus Sebastes were collected from Flemish Cap, an offshore Northwest Atlantic fishing bank east of the island of Newfoundland, Canada. A protocol based on discriminant function analysis and previously published age–length relationships was used to identify specimens of S. mentella and newly extruded (< 9 mm) S. fasciatus. On Flemish Cap, newly extruded larvae of S. mentella and S. fasciatus do not differ significantly in body proportions, fin morphology, or numbers of body myomeres but do differ significantly in pigmentation patterns on the head, nape, dorsal body midline, and numbers of subcaudal melanophores. A developmental series of S. mentella is described in terms of morphometry, meristics, occurrence of head spines, and pigmentation patterns and compared to previously published data on Sebastes spp. from other areas. The utility of various characters in relation to their use as identification criteria is discussed. The results of this morphological analysis support the contention that S. mentella and S. marinus larvae are more similar to each other than either of them is to S. fasciatus. |
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