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Risso’s dolphin (Grampus griseus) Mediterranean subpopulation Taxonomy Family Delphinidae Relevant Common Names EN FR ES AR HR EL HE IT ML PT TR Risso’s dolphin dauphin de Risso calderón gris, delfín de Risso (ghrambous) glavati dupin σταχτοδέλφινο (stachtodélfi no) (grampus) grampo delfi n griú grampo grampus Assessment Information Data Defi cient (DD) Year Assessed 2006 Assessor(s) Stefania Gaspari and Ada Natoli Evaluator(s) IUCN/ACCOBAMS Workshop on the Red List Assessment of Cetaceans in the ACCOBAMS Area (Monaco, 5-7 March 2006) Justification Risso’s dolphin is widely distributed in temperate and tropical waters worldwide but little is known about the species. Estimates of abundance are available for only a few regions and details of distribution are generally lacking. This is also true of Risso’s dolphins in the Mediterranean Sea. No large-scale surveys have been conducted to assess their range, distribution or numbers although their presence has been established from small-scale surveys in particular areas (specifi ed in later sections). The proposed listing is Data Defi cient. Long-term studies in the Ligurian-Corso-Provençal basin indicate that: 1- Risso’s dolphins in the Mediterranean are genetically differentiated from those in the eastern Atlantic (Gaspari et al 2006). 2- Genetic characteristics of animals sampled in the Ligurian-Corso-Provençal basin were variable but suggestive of intra-basin structuring (Gaspari et al 2006). 3- In the Ligurian-Corso-Provençal basin, a core group of individuals is present during the summer and this group shows a degree of site fi delity (Airoldi et al 2005). However, additional Risso’s dolphins probably visit the area. Annex 3: Regular Species 29
Mediterranean and Black Sea Cetacean Red List Assessment Grampus griseus 4- Preferred habitat is continental slope waters with steep relief. 5- Risso’s dolphins are taken as a bycatch in gillnets and on longlines. The following types of data are needed to support an assessment of the subpopulation: 1- Distribution and abundance, preferably in relation to habitat features and population substructure. 2- Genetic population structure, which requires more extensive sampling to cover a larger proportion of the species’ range within the Mediterranean. Distribution Country Names Territorial waters of Native - presence confirmed Native – possibly present Visitor Possibly Visitor Vagrant Possibly vagrant Other Albania X Algeria X Bosnia and Herzegovina Croatia Cyprus X Egypt X France X Gibraltar (UK) X Greece X Israel X Italy X Lebanon X Libya X Malta Monaco X Morocco X X Palestinian Territory X Serbia and Montenegro Slovenia Spain X Syria X Tunisia X Turkey X X X X X Annex 3: Regular Species 30
Page 2 and 3: Published by: The World Conservatio
Page 4 and 5: Contents Preface ------------------
Page 6 and 7: Background and Introduction The con
Page 8 and 9: Results Of the 12 assessed units in
Page 10 and 11: Acknowledgements Workshop participa
Page 12 and 13: Annex 1 Workshop Agenda Mediterrane
Page 14 and 15: Blue World Institute of Marine Rese
Page 16 and 17: Fin whale (Balaenoptera physalus) M
Page 18 and 19: Mediterranean and Black Sea Cetacea
Page 28 and 29: Long-finned pilot whale (Globicepha
Page 44 and 45: Harbour porpoise (Phocoena phocoena
Page 62 and 63: Striped dolphin (Stenella coeruleoa
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Mediterranean and Black Sea Cetacea
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Annex 4 Visitor Species Species Com
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Annex 5 Vagrant Species Species Com
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North Atlantic right whale (Eubalae
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Northern bottlenose whale (Hyperood
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Harbour porpoise (Phocoena phocoena
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Indo-Pacific humpback dolphin (Sous
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Annex 6 Introduced Species Species
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Annex 8 Species reported to have oc
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