Reproduction and Population Structure ofAcanthocardia tuberculata(Linnaeus, 1758) (Bivalvia: Cardiidae) in Southern Spain: Implications for Stock Management
| Autor: | Pablo Marina, Carmen Salas, Mouna Antit, Javier Urra, Cristina Tirado |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Biomass (ecology) biology Acanthocardia tuberculata 010604 marine biology & hydrobiology media_common.quotation_subject Population structure Zoology Aquatic animal 04 agricultural and veterinary sciences Aquatic Science Seasonality Bivalvia biology.organism_classification medicine.disease 01 natural sciences Fishery 040102 fisheries medicine 0401 agriculture forestry and fisheries Reproduction Sex ratio media_common |
| Zdroj: | Journal of Shellfish Research. 36:61-68 |
| ISSN: | 1943-6319 0730-8000 |
| Popis: | The cardid bivalve Acanthocardia tuberculata is harvested in southern Spain and on the Atlantic coast of Morocco for the Spanish canning industry. The reproductive cycle and population structure of this species were studied in southern Spain from June 1999 to May 2000, using histology and condition indices, as well as modal size classes in length-frequency distribution analysis. The samples were collected monthly during autumn and winter months and fortnightly during spring and summer months. A total of 4,047 specimens were examined, from which 3,539 specimens were processed for biomass analyses and 508 for the study of the gametogenic cycle. Shell lengths of individuals ranged from 6 to 76 mm (48.15 ± 15.15 mm, mean ± SD), and the sex ratio was 1:1. The reproductive cycle of A. tuberculata showed an annual pattern, with an extended sexual activity from January to July, during which successive spawning events were observed, and with a clear-cut resting period from September to November. Small-siz... |
| Databáze: | OpenAIRE |
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