Growth rates of the chokka squid Loligo reynaudii d’Orbigny, 1845 (Cephalopoda: Myopsida: Loliginidae) off South Africa, investigated over two years
| Autor: | Deon Durholtz, Dawit Yemane, Warwick H. H. Sauer, Collette H. Mwanangombe, Jean Githaiga-Mwicigi, Marek R. Lipinski |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Squid Ecology biology 010604 marine biology & hydrobiology Length frequency Zoology 04 agricultural and veterinary sciences biology.organism_classification 01 natural sciences biology.animal 040102 fisheries 0401 agriculture forestry and fisheries Animal Science and Zoology Loliginidae D orbigny Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Loligo reynaudii |
| Zdroj: | Folia Malacologica. 29:153-162 |
| ISSN: | 2300-7125 1506-7629 |
| DOI: | 10.12657/folmal.029.017 |
| Popis: | Growth of adult chokka squid Loligo reynaudii d’Orbigny was modelled using mantle length and age data derived from samples collected over two years (2003 and 2004) from a single, large cohort of mature and spawning squid. A total of 588 statoliths were examined (310 males, 278 females) from individuals of 71–425 mm mantle length (ML). The maximum size of chokka squid was 425 mm ML for males and 263 mm ML for females. The Francis Growth Model and Linear Growth model were selected for further analysis from six models considered. Males and females attain similar ages, although mantle length-based daily growth rates ranged from 0.75 to 1.02 (0.88 quantile _50) mm/day for males and 0.32–0.45 (0.38 quantile _50) mm/day for females, explaining the sexual dimorphism apparent in the sizes of individuals of this species. |
| Databáze: | OpenAIRE |
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