| community ecology of the metazoan parasites of white croaker, micropogonias furnieri (osteichthyes: sciaenidae), from the coastal zone of the state of rio de janeiro, brazil. | one hundred specimens of white croakers, micropogonias furnieri (desmarest 1823) (osteichthyes: sciaenidae) collected from pedra de guaratiba (23 degrees 01's, 43 degrees 38'w), state of rio de janeiro, brazil, from september 1997 to august 1999, were necropsied to study their parasites. the majority of the fish (95%) were parasitized by metazoan. twenty-eight species of parasites were collected. the nematodes were the 40.5% of the total number of parasites specimens collected. dichelyne elongat ... | 2001 | 11285488 |
| digenea and acanthocephala of elasmobranch fishes from the southern coast of brazil. | new records for helminth species recovered from elasmobranch fishes in brazil are established. digenean and acanthocephalan parasites of elasmobranch fishes are reported from the southern coast of brazil: otodistomum veliporum (creplin, 1837) stafford, 1904 (digenea: azygiidae) in the stomach and spiral valve of dipturus trachydermus and in the spiral valve of squatina sp. cystacanths and juveniles of the acanthocephalans corynosoma australe johnston, 1937 and corynosoma sp., in the spiral valve ... | 2001 | 11784929 |
| uterine adenocarcinoma with generalised metastasis in a bottlenose dolphin tursiops truncatus from northern patagonia, argentina. | an endometrial adenocarcinoma with areas of squamous differentiation and generalised metastasis was observed in a bottlenose dolphin tursiops truncatus stranded in northern patagonia in july 1997. this is the second report of a uterine adenocarcinoma in a free-living cetacean and the first in a delphinidae. this neoplasm likely compromised reproduction for several years. in addition, the dolphin presented tattoo-like skin lesions and its digestive tract was infested by anisakis simplex, pseudote ... | 2002 | 12005238 |
| metazoan parasite fauna as a biological tag for the habitat of the flounder hippoglossina macrops from northern chile, in a depth gradient. | quantitative changes in the parasite communities of the flounder hippoglossina macrops (steindachner) were studied along a depth gradient. samples were obtained from the waters off coquimbo, chile (29 degrees 18's to 30 degrees 50's), at depths ranging from 160 to 342 m. samples were assigned to 3 depths, i.e., shallow water (less than 200 m), midwater (from 200 to 300 m), and deep water (more than 300 m). twelve parasite species were recorded: neoheterobothrium chilensis and entobdella hippoglo ... | 2004 | 15715231 |
| corynosoma australe johnston, 1937 and c. cetaceum johnston & best, 1942 (acanthocephala: polymorphidae) from marine mammals and fishes in argentinian waters: allozyme markers and taxonomic status. | genetic and morphological studies were carried out on acanthocephalans belonging to corynosoma lühe, 1904 and referable to the species c. cetaceum johnston & best, 1942 and c. australe johnston, 1937, which were recovered from both definitive and intermediate hosts in argentinian waters. the aims were to estimate the level of genetic differentiation between the two taxa at any stage of their life-cycle, to provide genetic (allozyme) markers for their recognition and to analyse the systematic sta ... | 2005 | 15980967 |
| 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 |
| 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 |
| histological patterns of the intestinal attachment of corynosoma australe (acanthocephala: polymorphidae) in arctocephalus australis (mammalia: pinnipedia). | the mucosal attachment pattern of corynosoma australe in the intestines of arctocephalus australis is described. normal and abnormal tissue were sampled from 32 hosts to be submitted to histological routine protocol to embedding in paraffin and permanent mounting in balsam. corynosoma australe shows three different degrees of body depth intestinal attachment (bdina-1-3). bdina-1: it is exclusive of the small intestine and the parasite attaches on the villi; bdina-2: parasite affects the lieberkü ... | 2014 | 25320494 |
| homogeneity of parasite assemblages of dules auriga (serranidae) in hydrographically heterogeneous sites. | parasite assemblages of dules auriga are described for the first time from samples caught during research cruises in two localities of the argentine-uruguayan common fishing zone (aucfz) and are compared with four additional samples collected by commercial catches from the same region. a total of 178 fish were examined and 13 parasite species were found. this showed low species richness, a condition observed in some other small benthic species at a low trophic level. the composition of the paras ... | 2015 | 25846859 |
| the importance of the compound community on the parasite infracommunity structure in a small benthic fish. | the extent to which the structure of parasite infracommunities and component communities is determined by the composition of the compound community was assessed by determining the importance of unspecific larval parasites relative to the other guilds (ectoparasites and adult endoparasites). this was analyzed under the hypothesis that the infracommunities harbored by any fish species in coastal waters of the northern argentine sea will be dominated by unspecific larval stages, which also will be ... | 2009 | 18795329 |
| biogeographic patterns of metazoan parasites of the bigeye flounder, hippoglossina macrops, in the southeastern pacific coast. | we examined the metazoan parasite fauna of the bigeye flounder, hippoglossina macrops, in a latitudinal gradient of the southeastern pacific (ca. 25 degrees s-33 degrees s) to assess whether their parasites show latitudinal and/or biogeographical patterns, and to determine if these patterns agree well with those observed for free-living organisms. in total, 331 fish from 6 localities were analyzed. eighteen parasite species, including 5 ecto- and 13 endoparasites, were found in the bigeye flound ... | 2008 | 18564744 |
| metazoan parasite fauna of the bigeye flounder, hippoglossina macrops, from northern chile. influence of host age and sex. | the metazoan parasite fauna of hippoglossina macrops (n = 123) from northern chile (30 degrees s) is quantitatively described for the first time, and the role of host age and sex was evaluated. twelve parasite species were recovered, including 5 ectoparasites (2 monogenea, 2 copepoda and 1 piscicolidae) and 7 endoparasites (1 digenea, 3 cestoda, 2 acanthocephala, and 1 nematoda). the copepod holobomolochus chilensis, the monogenean neoheterobothrium sp., the adult acanthocephalan floridosentis s ... | 2001 | 11784921 |
| prey species of franciscana pontoporia blainvillei as paratenic hosts of helminths. | the distribution of franciscana pontoporia blainvillei gervais & d'orbigny, 1884, is restricted to the estuarine and coastal waters of the southwestern atlantic. the diet of this dolphin is composed of fishes, squids, and shrimps, many of which harbor helminths that may infect franciscana. larval forms of the trematode synthesium pontoporiae and the acanthocephalan bolbosoma turbinella have been recorded in franciscana; however, they have not yet been identified in any of the prey species of thi ... | 2017 | 28322211 |
| assessing host-parasite specificity through coprological analysis: a case study with species of corynosoma (acanthocephala: polymorphidae) from marine mammals. | in this paper we report an investigation of the utility of coprological analysis as an alternative technique to study parasite specificity whenever host sampling is problematic; acanthocephalans from marine mammals were used as a model. a total of 252 scats from the south american sea lion, otaria flavescens, and rectal faeces from 43 franciscanas, pontoporia blainvillei, from buenos aires province, were examined for acanthocephalans. specimens of two species, i.e. corynosoma australe and c. cet ... | 2012 | 21554836 |
| parasite assemblages of nemadactylus bergi (pisces: latridae): the role of larval stages in the short-scale predictability. | the short-scale temporal repeatability in the structure and composition of parasite communities of nemadactylus bergi were analyzed by comparing population and infracommunity descriptors in five samples caught off mar del plata, argentina (38º 27' s, 57º 90' w) at intervals of 20 days. this is the first study aiming to detect relevant local or short-term processes in an area where larval endohelminths dominate the parasite assemblages and are expected to provide predictability to the communities ... | 2010 | 20697912 |