Preprint volume - SIBM

Pre-print Volume –Invited presentations
Topic 4: THE ELASMOBRANCHS
There is not an univocal trend in total biomass catch of Chondrichtyes in the 7 GSA.
Only in GSA16 (Sicily Channel) there is an increasing trend after 2001 with catch up
to 160 kg/km 2 in 2008 while from 1994 to 1999 the biomass was about 50 kg/km 2 .
Similar values were obtained in Sardinia (GSA11) but the 160 kg/km 2 was reached in
2001 and in 2008 the biomass caught was 50 kg/km 2 .
Tab. 1 – Chondrychthyes caught during MEDITS surveys (1994-2008) in the 7 Italian GSAs.
Pesci cartilaginei catturati durante le campagna MEDITS (1994-2008) nelle 7 GSA italiane.
Species 9 10 11
GSAs
16 17 18 19 Total % GSA
Chimaera monstrosa Linnaeus, 1758 * * * * * * 6 85.7
Galeus melastomus Rafinesque, 1810 * * * * * * * 7 100.0
Scyliorhinus canicula (Linnaeus, 1758) * * * * * * * 7 100.0
Scyliorhinus stellaris (Linnaeus, 1758) * * * * * * * 7 100.0
Galeorhinus galeus (Linnaeus, 1758) * 1 14.3
Mustelus asterias Cloquet, 1821 * * * 3 42.9
Mustelus mustelus (Linnaeus, 1758) * * * * * * 6 85.7
Mustelus punctulatus Risso, 1826 * * 2 28.6
Heptranchias perlo (Bonnaterre, 1788) * * * * 4 57.1
Hexanchus griseus (Bonnaterre, 1788) * * * * 4 57.1
Centrophorus granulosus (Bloch and Schneider, 1801) * * * * * 5 71.4
Centrophorus uyato (Rafinesque, 1810) * * * 3 42.9
Dalatias licha (Bonnaterre, 1788) * * * * * * * 7 100.0
Etmopterus spinax (Linnaeus, 1758) * * * * * * * 7 100.0
Oxynotus centrina (Linnaeus, 1758) * * * * * * 6 85.7
Squalus acanthias Linnaeus, 1758 * * * * * * 6 85.7
Squalus blainvillei (Risso 1826) * * * * * * 6 85.7
Dasyatis centroura (Mitchill, 1815) * 1 14.3
Dasyatis pastinaca (Linnaeus, 1758) * * * * * * 6 85.7
Pteroplatytrygon violacea (Bonaparte, 1832) * 1 14.3
Gymnura altavela (Linnaeus, 1758) * 1 14.3
Myliobatis aquila (Linnaeus, 1758) * * * * * * 6 85.7
Pteromylaeus bovinus (Geoffroy St-Hilarie, 1817) * 1 14.3
Rhinoptera marginata (Geoffroy st-Hilarie, 1817) * 1 14.3
Dipturus batis (Linnaeus, 1758) * 1 14.3
Dipturus oxyrinchus (Linnaeus, 1758) * * * * * 5 71.4
Leucoraja circularis (Couch, 1838) * * * * * 5 71.4
Leucoraja fullonica (Linnaeus, 1758) * * * * 4 57.1
Leucoraja melitensis (Clark, 1926) * 1 14.3
Raja asterias Delaroche, 1809 * * * * * * * 7 100.0
Raja brachyura Lafont, 1873 * * 2 28.6
Raja clavata Linnaeus, 1758 * * * * * * 6 85.7
Raja miraletus Linnaeus, 1758 * * * * * * * 7 100.0
Raja montagui Fowler, 1910 * * * * * * 6 85.7
Raja polystigma Regan, 1923 * * * * * 5 71.4
Raja radula Delaroche, 1809 * 1 14.3
Rostroraja alba Lacépède, 1803 * 1 14.3
Torpedo marmorata Risso, 1810 * * * * * * * 7 100.0
Torpedo nobiliana Bonaparte, 1835 * * * * * * * 7 100.0
Torpedo torpedo (Linnaeus, 1758) * * * * * * 6 85.7
Total species caugth (40) 26 26 25 30 25 20 23
41 st S.I.B.M. CONGRESS Rapallo (GE), 7-11 June 2010
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