Stock mapping, size structure and biological parameters of the clam Polititapes aureus in the shellfish production area of the southern Tunisian waters (Central Mediterranean)

• Autorzy: Derbali Abdelkarim , Jarboui Othman

Identyfikatory

DOI

10.2478/oandhs-2021-0012

• Języki publikacji: EN

Abstrakty

EN

The clam Polititapes aureus is one of the most abundant shellfish species in the southern Tunisian waters. Its current exploitation status and management are becoming a major concern for fishing industry in Tunisia. The significant ecological role of the species and possible future commercial benefits require a better knowledge of its stock. This research is the first attempt to investigate its current status in an area with the largest shellfish production. The obtained results showed a scattered distribution. The stock density ranged from 0 to 124 ind. m⁻², and biomass values varied from 0 to 300 g m⁻². This results in a remarkable biomass of 201.2 (± 64.6) t and high abundance reaching 91.3 ± 32.9 million individuals, estimated an area of 4182 ha. The species distribution was also investigated, with the size ranging from 4.9 to 35.34 mm. The overall sex ratio (F:M) was 1.26:1, which significantly deviated different from parity (1:1). The main environmental factors were identified and several abiotic parameters were found to strongly affect the spread of the clam species. The clam reproduce well and is expected to almost meet the domestic market demand through artisanal fishery.

Słowa kluczowe

EN

edible shellfish species; morphometric relationships; Polititapes aureus; population structure; sex ratio; south Tunisia; stock mapping

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2021
• Tom: Vol. 50, No. 2
• Strony: 128--136
• Opis fizyczny: Bibliogr. 44 poz.

Twórcy

autor

Derbali Abdelkarim

• Institut National des Sciences et Technologies de la Mer (INSTM), Sfax, Tunisia

autor

Jarboui Othman

• Institut National des Sciences et Technologies de la Mer (INSTM), Sfax, Tunisia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).