Search results for "Pilot whale"
showing 8 items of 8 documents
Long-Distance Travellers: Phylogeography of a Generalist Parasite, Pholeter gastrophilus, from Cetaceans
2017
We studied the phylogeography and historical demography of the most generalist digenean from cetaceans, Pholeter gastrophilus, exploring the effects of isolation by distance, ecological barriers and hosts' dispersal ability on the population structure of this parasite. The ITS2 rDNA, and the mitochondrial COI and ND1 from 68 individual parasites were analysed. Worms were collected from seven oceanic and coastal cetacean species from the south western Atlantic (SWA), central eastern Atlantic, north eastern Atlantic (NEA), and Mediterranean Sea. Pholeter gastrophilus was considered a single lineage because reciprocal monophyly was not detected in the ML cladogram of all individuals, and seque…
Intestinal helminth communities of the long-finned pilot whale (Globicephala melas) off the Faroe Islands.
1993
SUMMARYThe intestines of 170 long-finned pilot whales, Globicephala melas, caught off the Faroe Islands (N.E. Atlantic) were examined for helminth parasites. Eight species were detected but only 4 occurred in at least 10% of the sample. No core or recurrent group of species were identified and no correlations between abundances of species were significant. Diversity values were far below those reported for other endotherms. Colonization by helminths was random, whales not being readily colonized. These features point to largely unpredictable, isolationist infracommunities, there being little potential for inter-specific interactions. Older hosts tended to harbour more diverse infracommuniti…
A new species of the genusCrassicaudaLeiper et Atkinson, 1914 (Nematoda: Spiruroidea) from the penis ofGlobicephala melas(Traill, 1809) (Cetacea: Glo…
1990
The examination of a male long-finned pilot whale (Globicephala melas) stranded at Cullera (Spanish Mediterranean coast) resulted in the finding of nematodes of the genus Crassicauda parasitising the penis. Pathologies associated with these worms were observed and are described here. The morphometric and morphological study of these helminths revealed that they represent a new species, Crassicauda carbonelli n. sp., which differs from other species of the genus Crassicauda in body size, cephalic morphology and spicule size in the males. Crassicauda sp. described by Dollfus (1968) must be ascribed to C. carbonelli n. sp. The taxonomy, morphometric variability of the eggs, site in the hosts, …
Recent increase of ulcerative lesions caused by Anisakis spp. in cetaceans from the north-east Atlantic
2020
Abstract Species of Anisakis typically infect the stomach of cetaceans worldwide, often causing ulcerative lesions that may compromise the host's health. These nematodes also cause anisakiasis or allergic reactions in humans. To assess the risks of this emerging zoonosis, data on long-term changes in Anisakis infections in cetaceans are necessary. Here, we compare the prevalence and severity of ulcerative lesions caused by Anisakis spp. in five cetacean species stranded along the north-west Spanish coast in 2017–2018 with published data from 1991–1996. Open ulcers were found in 32/43 short-beaked common dolphins, Delphinus delphis; 3/5 striped dolphins, Stenella coeruleoalba; 1/7 bottlenose…
Diphyllobothriids (Cestoda: Pseudophyllidea) from the long-finned pilot whale Globicephala melas (Traill, 1809) off the Faroe Islands, with comments …
1993
The taxonomy of marine species of the genus Diphyllobothrium, particularly those parasitic in cetaceans, is rather confused. During parasitological investigations of long-finned pilot whales Globicephala melas from waters off the Faroe Islands, five diphyllobothriid species were detected: Diphyllobothrium sp. (possibly D. polyrugosum), D. stemmacephalum, Diphyllobothrium sp. A, Diphyllobothrium sp. B and Diphyllobothriidae sp. D. stemmacephalum is reported for the first time from G. melas. The stituation regarding the taxonomy of Diphylobothrium species from cetaceans is briefly reviewed. It is concluded that the recent development of genetic techniques may be of great value in relation to …
Seroprevalence of Toxoplasma gondii antibodies in wild dolphins from the Spanish Mediterranean coast.
2004
Although Toxoplasma gondii infection has been found occasionally in cetaceans, little is known of the prevalence of antibodies to T. gondii in wild dolphins. Antibodies to T. gondii were determined in serum samples from 58 dolphins stranded in the Spanish Mediterranean coast. Modified agglutination test was used to determine T. gondii antibodies, and a titer of 1:25 was considered indicative of T. gondii infection. Antibodies to T. gondii were found in 4 of 36 striped dolphins (Stenella coeruleoalba), in 2 of 4 common dolphins (Delphinus delphis), in 4 of 7 bottlenose dolphins (Tursiops truncatus), and in 1 harbour porpoise (Phocoena phocoena). Antibodies were not found in 9 Risso's dolphin…
Comparative Respiratory Physiology in Cetaceans.
2019
In the current study, we used breath-by-breath respirometry to evaluate respiratory physiology under voluntary control in a male beluga calf [Delphinapterus leucas, body mass range (M b): 151-175 kg], an adult female (estimated M b = 500-550 kg) and a juvenile male (M b = 279 kg) false killer whale (Pseudorca crassidens) housed in managed care. Our results suggest that the measured breathing frequency (f R) is lower, while tidal volume (V T) is significantly greater as compared with allometric predictions from terrestrial mammals. Including previously published data from adult bottlenose dolphin (Tursiops truncatus) beluga, harbor porpoise (Phocoena phocoena), killer whale (Orcinus orca), p…
Redescription ofOdhneriella subtila (Skrjabin, 1959) (Digenea: Campulidae) from the intestine ofGlobicephala melaena (Traill, 1809) (Cetacea: Delphin…
1989
During parasitological investigations of long-finned pilot whales,Globicephala melaena (Traill, 1809), in the Faroe Islands, the trematode speciesOdhneriella subtila (Digenea: Campulidae), parasitising the small intestine, was detected. Skrjabin's (1959) original description of this species was based on a single individual. The collection and availability for study of several thousands of specimens permitted the redescription of this campulid and the noting of some new morphological characters. This trematode is reported for the first time from the long-finned pilot whale, and the Atlantic Ocean is a new locality record.