Citation
Sumpton Wayne D., . and Jackson Stuart, . Reproductive biology of snapper (Pagrus auratus) in subtropical areas of its range and management implications of reproductive differences with temperate populations. pp. 194-207. ISSN 0116-6514
Abstract
Snapper (Pagrus auratus) (Bloch and Schneider) sampled from the waters of the Queensland east coast (20 to 28S) spawned from June to October at least three months earlier than the New Zealand snapper (36 to 44S) and snapper from other temperate latitudes. The size at which snapper reached sexual maturity (26 to 30 cm FL) was broadly similar to other more temperate areas. However the apparent faster growth rate of tropical snapper enabled them to reach sexual maturity at less than 2 years of age more than a year earlier than in more temperate latitudes. This suggests that the attainment of sexual maturity in snapper is more likely to be based on size than age. There were also fish as old as 5 years that had not yet matured. No specific snapper spawning grounds were sampled and snapper with ripe gonads were found throughout the species distribution in Queensland. Snapper mainly spawned in the evening and early morning. The timing of the spawning season relative to the timing of the winter growth check formation may be partially responsible for the difficulty in interpreting snapper otoliths in subtropical areas.
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Abstract
Snapper (Pagrus auratus) (Bloch and Schneider) sampled from the waters of the Queensland east coast (20 to 28S) spawned from June to October at least three months earlier than the New Zealand snapper (36 to 44S) and snapper from other temperate latitudes. The size at which snapper reached sexual maturity (26 to 30 cm FL) was broadly similar to other more temperate areas. However the apparent faster growth rate of tropical snapper enabled them to reach sexual maturity at less than 2 years of age more than a year earlier than in more temperate latitudes. This suggests that the attainment of sexual maturity in snapper is more likely to be based on size than age. There were also fish as old as 5 years that had not yet matured. No specific snapper spawning grounds were sampled and snapper with ripe gonads were found throughout the species distribution in Queensland. Snapper mainly spawned in the evening and early morning. The timing of the spawning season relative to the timing of the winter growth check formation may be partially responsible for the difficulty in interpreting snapper otoliths in subtropical areas.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Pagrus auratus |
| AGROVOC Term: | Reproductive behaviour |
| AGROVOC Term: | Snappers |
| AGROVOC Term: | Sexual maturity |
| AGROVOC Term: | Temperate zones |
| AGROVOC Term: | Spawning |
| AGROVOC Term: | Otoliths |
| AGROVOC Term: | Capture fisheries |
| AGROVOC Term: | Animal histology |
| AGROVOC Term: | Oocytes |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:28 |
| URI: | http://webagris.upm.edu.my/id/eprint/23772 |
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