| parasite communities of common dolphins (delphinus delphis) from patagonia: the relation with host distribution and diet and comparison with sympatric hosts. | we studied the helminths of 18 common dolphins, delphinus delphis, from northern patagonia. parasites were found only in the gastrointestinal tract. four species were in the stomach, the nematode anisakis simplex, the acanthocephalan corynosoma cetaceum, and the digeneans braunina cordiformis and pholeter gastrophilus, plus 1 digenean in the hepatopancreatic ducts, oschmarinella rochebruni. infection levels were low (0-155 parasites). braunina cordiformis and c. cetaceum were the most prevalent ... | 2007 | 18163339 |
| parasites in stranded cetaceans of patagonia. | there is an increasing interest in parasites of marine mammals of argentina. here, we examined several poorly known cetaceans, i.e., 2 spectacled porpoises and 1 burmeister's porpoise (phocoenidae), and 1 gray's beaked whale and 1 cuvier's beaked whale (ziphidae); we also updated the parasite information for 1 sperm whale (physeteridae). these hosts strand only occasionally. we found anisakis simplex s.l. in 2 spectacled porpoises and the burmeister's porpoise, and recorded its distribution amon ... | 2008 | 18576713 |
| the metazoan parasite communities of the argentinean sandperch pseudopercis semifasciata (pisces: perciformes) and their use to elucidate the stock structure of the host. | the use of parasites as biological tags allowed the identification of 3 stocks of argentinean sandperch, pseudopercis semifasciata (cuvier), in the argentine sea. a total of 100 specimens caught in 3 zones: villa gesell (37 degrees 15's, 57 degrees 23'w; n=20), miramar (38 degrees 03's, 57 degrees 30'w-38 degrees 44's, 58 degrees 44'w; n=30) and península valdes (42 degrees 00'-42 degrees 45's; n=50), were examined and 28 parasite species were found, 15 of them being new host records. both univa ... | 2009 | 19627631 |
| gastrointestinal parasites of bottlenose dolphins tursiops truncatus from the extreme southwestern atlantic, with notes on diet composition. | we surveyed the gastrointestinal tracts of 6 bottlenose dolphins tursiops truncatus from patagonia to check for helminth parasites and characterize dolphin diet. all dolphins harbored parasites (6477 helminths). we recorded 7 species, including nematodes anisakis simplex s.l., pseudoterranova decipiens, acanthocephalans corynosoma cetaceum, c. australe, and digeneans braunina cordiformis, pholeter gastrophilus and synthesium tursionis. among the gastric helminths, the most prevalent species were ... | 2014 | 24492055 |
| intestinal helminth fauna of the south american sea lion otaria flavescens and fur seal arctocephalus australis from northern patagonia, argentina. | we report on the intestinal helminth fauna of 56 south american sea lions, otaria flavescens, and 5 south american fur seals, arctocephalus australis, from northern patagonia, argentina. a total of 97,325 helminth specimens were collected from sea lions. gravid individuals were represented by 6 species of parasites: 1 digenean (ascocotyle (ascocotyle) patagoniensis), 1 cestode (diphyllobothrium spp.), 3 nematodes (uncinaria hamiltoni, contracaecum ogmorhini s.s., pseudoterranova cattani) and 1 a ... | 2013 | 22967801 |
| presence of genital spines in a male corynosoma cetaceum johnston and best, 1942 (acanthocephala). | we collected 83 females and 80 males of corynosoma cetaceum from 2 common dolphins, delphinus delphis, collected in northern patagonia (argentina). worms were most similar to specimens collected in other south american localities. however, 1 male had 2 spines adjacent to the genital pore and isolated from the rest of body spines. this finding confirms the recent reassignment of c. cetaceum to corynosoma. absence of genital spines is suggested to be avoided as the sole criterion to exclude specim ... | 2002 | 12054020 |
| acanthocephalan cystacanths from flatfish (order pleuronectiformes) in tropical australian waters. | cystacanths of 4 species of acanthocephala are reported for the first time from various species of fish belonging to the order pleuronectiformes from waters of the western gulf of carpentaria and the central coast of queensland, australia: corynosoma cetaceum johnston and best, 1942 (family polymorphidae), serrasentis cf. sagittifer (linton, 1889) and rhadinorhynchus sp. (family rhadinorhynchidae), and gorgorhynchoides sp. (family isthmosacanthidae). approximately 32% of the 515 individual fish ... | 2015 | 25807200 |
| patterns of trunk spine growth in two congeneric species of acanthocephalan: investment in attachment may differ between sexes and species. | acanthocephalans have evolved a hooked proboscis and some taxa have trunk spines to attach to their definitive hosts. these structures are generated before being used, thus a key question is how investment in attachment could optimally be allocated through the ontogeny. the number and arrangement of hooks and spines are never modified in the definitive host, but it is unclear whether these structures grow during adult development. a comparison of the size of trunk spines between cystacanths and ... | 2012 | 22309658 |
| molecular phylogeny of corynosoma lühe, 1904 (acanthocephala), based on 5.8s and internal transcribed spacer sequences. | species of corynosoma (acanthocephala) are distributed worldwide as parasites of marine mammals and sea birds. species diagnosis is based on morphological characters, including the size and number of hooks in the proboscis and the number of spines in the dorsal and ventral regions of the body. we inferred the phylogenetic relationships of 10 nominal species of corynosoma through analysis of internal transcribed spacers (its-1, its-2) and 5.8s ribosomal rna sequences. nucleotide distances between ... | 2005 | 15986610 |
| corynosoma cetaceum in the stomach of franciscanas, pontoporia blainvillei (cetacea): an exceptional case of habitat selection by an acanthocephalan. | adult acanthocephalans are typically found in the intestine of vertebrates, where they can readily absorb nutrients. however, corynosoma cetaceum has been frequently reported in the stomach of cetaceans from the southern hemisphere. the ecological significance of this habitat was investigated by examining data on number, sex ratio, maturity status, biomass, and fecundity of c. cetaceum in different parts of the digestive tract of 44 franciscanas pontoporia blainvillei. individual c. cetaceum occ ... | 2001 | 11426715 |
| polymorphus arctocephali smales, 1986, a synonym of corynosoma cetaceum johnston & best, 1942 (acanthocephala: polymorphidae). | polymorphus arctocephali (acanthocephala: polymorphidae) was differentiated from p. cetaceum based on patterns in the trunk spine distribution and slight morphometric differences. the comparison of both species involved samples from south australia and did not include p. cetaceum from south america. in this paper we re-examine the systematic position of p. arctocephali based on a more detailed morphological and geographical analysis. results indicate that p. arctocephali does not differ in trunk ... | 1999 | 10619074 |
| constructional morphology and mode of attachment of the trunk of corynosoma cetaceum (acanthocephala: polymorphidae). | dead specimens of corynosoma cetaceum were used to describe the trunk musculature of this species and to infer the use of the trunk as a secondary holdfast. inferences were based on trunk muscle arrangement, changes in trunk shape, size and distribution of spines, and geometry of tegument thickness. the foretrunk of c. cetaceum is swollen and forms a spiny disk that is bent ventrally. the disk is flattened by several groups of muscles not described previously, which seem able to finely adjust th ... | 1999 | 10461134 |
| [corynosoma cetaceum johnston and best, 1942 (acanthocephala) in chilean dolphin, cephalorhynchus entropia gray, 1846 (cetacea: delphinidae)]. | the finding of corynosoma cetaceum johnston and best 1942, as a parasite of cephalorhynchus eutropia gray, 1846, is reported. this constitutes the first record of this acanthocephala in a new host, as well a new geographic distribution. | 2006 | 2152368 |