Growth of the Atlantic bonito (Sarda sarda Bloch, 1793) in the Atlantic and Mediterranean area of the Strait of Gibraltar
[EN] The reading of skeletal parts has been widely used as a method for assessing growth in fishes. The objective of this work has been the determination of age and growth of the Atlantic bonito (Sarda sarda) in the Mediterranean and Atlantic areas of the Strait of Gibraltar. The identity of the pop...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1986 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/329146 |
| Acceso en línea: | http://hdl.handle.net/10261/329146 |
| Access Level: | acceso abierto |
| Palabra clave: | Sarda sarda Centro Oceanográfico de Vigo Pesquerías Age and growth Mediterranean and Atlantic Seas Gibraltar Strait Edad y crecimiento Mediterráneo y Atlántico Estrecho de Gibraltar |
| Sumario: | [EN] The reading of skeletal parts has been widely used as a method for assessing growth in fishes. The objective of this work has been the determination of age and growth of the Atlantic bonito (Sarda sarda) in the Mediterranean and Atlantic areas of the Strait of Gibraltar. The identity of the population of bonito in the two areas has been demonstrated by tagging experiments, showing migrations through the Strait. In this study three different skeletal parts have been used: the otoliths, the precaudal vertebrae and cross sections of the first spine of the first dorsal fin, from 272 individuals. Specimens ranged in size from 24.0 to 71.5 cm (fork length) were caught between 1980 and 1983. As a result of this work, we made a size-age key from which we estimate the following mean sizes for each age class: Age 0: 37.03 cm; Age I: 51.71 cm; Age Il: 57.04 cm; Age III: 63.15 cm; Age IV: 71.0 cm. On the basis of the Ford-Walford method, L∞= 80.87, t0= -1.7, and K= 0.352. In consequence we can express the Von Bertalanffy equation in this way: Lt = 80.87 [1 - e- 0.352(t+1.7)] |
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