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Recrutement de Diplodus annularis et Spondyliosoma cantharus (Sparidae) dans les herbiers superficiels de phanérogames marines, le long des côtes italiennes (mer Méditerranée) = Recruitment of Diplodus annularis and Spondyliosoma cantharus (Sparidae in shallow seagrass beds along the Italian coasts (Mediterranean Sea)
Guidetti, P.; Bussotti, S. (1997). Recrutement de Diplodus annularis et Spondyliosoma cantharus (Sparidae) dans les herbiers superficiels de phanérogames marines, le long des côtes italiennes (mer Méditerranée) = Recruitment of Diplodus annularis and Spondyliosoma cantharus (Sparidae in shallow seagrass beds along the Italian coasts (Mediterranean Sea). Mar. Life 7(1-2): 47-52
In: Marine Life = Vie Marine. Institut Océanographique Paul Ricard: Marseille. ISSN 1168-3430; e-ISSN 2117-7368, meer
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- Guidetti, P., meer
- Bussotti, S.
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| Abstract |
Observations on the presence and abundance of juveniles of the two sparids Diplodus annularis and SpondyIiosoma cantharus were carried out in shallow (between 0.4 m and 7 m depth) meadows of marine phanerogams (Posidonia oceanica, Cymodocea nodosa and Zostera noltii) in several localities along the Italian coasts. Data were collected by using the non-destructive visual census method and juveniles were counted along transects of prestablished area. Juveniles of Diplodus annularis were censused from July to October both in Posidonia oceanica and in short-leaved seagrasses (Cymodocea nodosa and Zostera noltii); juveniles of Spondyliosoma cantharus were observed from July to October only in Posidonia oceanica beds. Peak of juvenile density (number of individuals/150m²) was recorded in August for both species. Thus, these two species were closely linked to marine phanerogam meadows for settlement. In general, sheltered sites seemed more suitable for settlement than exposed ones. These data highlight the importance of seagrasses in the coastal systems for the biology of the two investigated fish species, mainly during the first phase of their benthic life. This emphasizes the need for correct management fInd preservation of coastal zones, as alterations caused by any kind of anthropogenic disturbance could dramatically affect their recruitment potential. |
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