Acta Adriatica, Vol. 53 No. 1, 2012.
Izvorni znanstveni članak
Spatiotemporal patterns of distribution of large predatory sharks in Calabria (central Mediterranean, southern Italy)
Emilio SPERONE
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Giovanni PARISE
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Agostino LEONE
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Concetta MILAZZO
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Vincenzo CIRCOSTA
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Gloriano SANTORO
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Giuseppe PAOLILLO
; WWF Kalabrija, Vibo Valentia, Italija
Primo MICARELLI
; Akvarij Morski svijet – Neprofitna udruga Posidonia, Massa Marittima (GR), Italija
Sandro TRIPEPI
; Odsjek ekologije, Sveučilište u Kalabriji, Italija
Sažetak
During the 2000-2009, a survey study on the spatiotemporal patterns of distribution of large predatory sharks was carried out in the Calabria region. A total of 12 species were recorded and among them the blue shark Prionace glauca and the bluntnose sixgill shark Hexanchus griseus were the most common ones. Also of interest was the frequency of species such as Carcharodon carcharias, Sphyrna zygaena and Cetorhinus maximus. 57% of all reported records derived from the Tyrrhenian side of the region and 43% on the Ionian side. A significant relationship between season of the year versus number of records was found, but this could be related to the small number of observers that were active during the winter months. The presence of Sphyrna lewini is reported for the study area; this species was previously recorded only in the western part of the Mediterranean Sea. This paper also provides evidence of the second and first documented accounts of white shark predation upon Tursiops truncatus and Stenella coeruleoalba, respectively, in the Mediterranean Sea. The recovering of Ionian Sphyrna zygaena populations and the declining of Lamna nasus populations were also noted.
Ključne riječi
Ecology; biogeography; elasmobranchs; Sphyrna lewini; Carcharodon carcharias; dolphins
Hrčak ID:
89737
URI
Datum izdavanja:
30.6.2012.
Posjeta: 3.657 *