Identificazione e distribuzione nei mari italiani di specie non indigene Classe Osteichthyes Siganus luridus Ordine Perciformes (Rüppell, 1828) Famiglia Siganidae SINONIMI RILEVANTI Teuthis lurida (Rüppell, 1828) DESCRIZIONE COROLOGIA / AFFINITA’ Corpo slanciato e compresso; pinna caudale Subtropicale tronca. Profilo dorsale della testa ridotto e fortemente concavo sopra la nuca; muso molto DISTRIBUZIONE ATTUALE spuntato; narice anteriore con un lembo che raggiunge o supera la narice posteriore. Una spina Mar Rosso, Africa orientale da Mauricius e Reunion diretta in avanti anteriormente alla pinna dorsale. al Golfo Arabico, Mediterraneo. Scaglie minute. PRIMA SEGNALAZIONE IN MEDITERRANEO COLORAZIONE Israele nel 1956 (Ben Tuvia, 1964) Testa e fianchi verde oliva o marrone scuro; spesso linee vermicolate chiare sui fianchi, pinne PRIMA SEGNALAZIONE IN ITALIA pettorali giallo-ialine. Linosa, luglio 2003 (Azzurro & Andaloro 2004). FORMULA MERISTICA ORIGINE D I+XIII,10; A VII,8-9; P 16-17; V I+3+I Mar Rosso VIE DI DISPERSIONE PRIMARIE Migrazione lessepsiana. Identificazione e distribuzione nei mari italiani di specie non indigene TAGLIA MASSIMA VIE DI DISPERSIONE SECONDARIE 300 mm STADI LARVALI STATO DELL ’INVASIONE Uova e larve pelagiche Colonizzatore recente. SPECIE SIMILI Siganus rivulatus MOTIVI DEL SUCCESSO CARATTERI DISTINTIVI Probabile scarsità di competitori erbivori. La pinna caudale in S. luridus è tronca mentre in S. SPECIE IN COMPETIZIONE rivulatus è moderatamente forcuta. Sarpa salpa HABITAT IMPATTI Substrati duri ricoperti da vegetazione. DANNI ECOLOGICI DANNI ECONOMICI PARTICOLARI CONDIZIONI AMBIENTALI IMPORTANZA PER L ’UOMO BIOLOGIA Pericolosa per la presenza di spine velenose. Erbivoro, predilige le alghe brune ed in particolare quelle dei generi Sargassum , Padina , Dictlyotales and Sphacelaria . La riproduzione avviene tra BANCA DEI CAMPIONI Aprile ed Agosto. I giovanili vivono generalmente in grandi gruppi, mentre gli adulti in piccoli gruppi. PRESENZA IN G -BANK - PROVENIENZA DEL CAMPIONE TIPOLOGIA : esemplare intero congelato LUOGO DI CONSERVAZIONE : ISPRA Milazzo CODICE CAMPIONE Identificazione e distribuzione nei mari italiani di specie non indigene BIBLIOGRAFIA Abdallah, M., 2002. Length-weight relationship of fishes caught by trawl off Alexandria, Egypt. Naga, The ICLARM Quarterly, 25(1), 19-20. Al-Hassan L.A.J. & El-Silini O.A., 1999. Check-list of bony fishes collected from the Mediterranean coast of Benghazi, Libya. Revista de Biologia Marina y Oceanografia 34(2): 291-301. Azzurro E. & Andaloro F. 2004. A new settled population of the Lessepsian migrant Siganus luridus (Pisces: Siganidae) in Linosa Island – Sicily Strait. JMBA UK, 84:819-821 Bardamaskos G., Tsiamis K., Panayotidis P., Megalofonou P. 2008. New records and range expansion of alien fishes and macroalgae in Greek waters (south-east Ionian Sea). 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