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Striped dolphin (Stenella coeruleoalba) Mediterranean subpopulation Taxonomy Family Delphinidae Relevant Common Names EN FR ES AR HR EL HE IT ML PT TR striped dolphin dauphin bleu et blanc delfín listado (delfi n azraq wa abyad) prugasti dupin ζωνοδέλφινο (zonodélfi no) (stenella mefuspeset) stenella striata stenella golfi nho riscado cizgili vunus Assessment Information Vulnerable (VU A4d,e) Year Assessed 2006 Assessor(s) Alex Aguilar Evaluator(s) IUCN/ACCOBAMS Workshop on the Red List Assessment of Cetaceans in the ACCOBAMS Area (Monaco, 5-7 March 2006) Justification VU A4d,e: The species has been, and is currently, subject to a number of threats, the combined effects of which give cause to suspect a reduction in total population size of at least 30% over three generations (ca. 60 years) encompassing both the past and the future (A4). The principal causative factor is incidental mortality in fi shing gear, particularly in pelagic driftnets, which is suspected to have been high (in the 1000s/year) during at least the last two decades and is continuing (A4d). In addition, a reduction in population size is suspected to have occurred in 1990-92 as a result of a large-scale die-off caused (proximally at least) by an epizootic (A4e). The incidental mortality has not ceased and the causal factors involved in the early 1990s die-off are neither well understood nor resolved. The 1990-92 epizootic devastated the whole Mediterranean population of striped dolphins, producing many 1000s of deaths (Bortolotto et al., 1992; Aguilar and Raga, 1993). The primary cause was a morbillivirus infection (Domingo et al., 1990) but PCBs and other organochlorine pollutants with potential for immunosuppressive effects may have triggered the event or enhanced its spread and lethality (Aguilar and Borrell, 1994). Organochlorine pollutants are found at levels in Mediterranean striped dolphins that greatly exceed thresholds of reproductive impairment in bottlenose dolphins elsewhere. Annex 3: Regular Species 57
Mediterranean and Black Sea Cetacean Red List Assessment Stenella coeruleoalba Moreover, unusual luteinized cysts, with the potential to impede ovulation, have been found in the ovaries of Mediterranean striped dolphins; these cysts have also been associated with the high levels of PCB exposure. The occurrence of the cysts and the reproductive impairment induced by PCBs may be depressing reproductive rates, hence inhibiting demographic recovery. Finally, decreased food availability caused by fishing overexploitation is an added potential limitation to recovery. 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 X Croatia X Cyprus X Egypt X France X Gibraltar (UK) X Greece X Israel X Italy X Lebanon X Libya X Malta X Monaco X Morocco X Palestinian Territory X Serbia and Montenegro X Slovenia X Spain X Syria X Tunisia X Turkey X Annex 3: Regular Species 58
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Published by: The World Conservatio
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Contents Preface ------------------
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Background and Introduction The con
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Results Of the 12 assessed units in
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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 34 and 35: Risso’s dolphin (Grampus griseus)
Page 44 and 45: Harbour porpoise (Phocoena phocoena
Page 96 and 97: Annex 4 Visitor Species Species Com
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Mediterranean and Black Sea Cetacea
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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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