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William F Font - One of the best experts on this subject based on the ideXlab platform.
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seasonal and yearly population dynamics of two exotic helminths Camallanus cotti nematoda and bothriocephalus acheilognathi cestoda parasitizing exotic fishes in waianu stream o ahu hawaii
Journal of Parasitology, 2003Co-Authors: Amanda G Vincent, William F FontAbstract:Exotic poeciliid fishes introduced into Hawaiian freshwaters are responsible for the introduction of several exotic parasites, of which the most important are Camallanus cotti and Bothriocephalus acheilognathi in terms of potential disease threat to native stream fishes. This roundworm and tapeworm are the most prevalent and abundant freshwater fish helminths in Hawaiian streams. This study examined the seasonal and yearly population structure of C. cotti and B. acheilognathi to determine if the tropical Hawaiian environment characterized by low climatic variability permits continuous opportunities for parasite transmission regardless of time of year. Camallanus cotti displayed seasonal differences in prevalence and mean abundance, whereas B. acheilognathi did not. Camallanus cotti prevalence and mean abundance were higher in the Hawaiian summer (47.7%, 0.79) than in winter (25.8%, 0.36). A seasonal relationship of C. cotti levels is likely explained by extensive rains associated with the Hawaiian winter season, which may act to decrease parasite transmission by flushing infected poeciliid hosts, intermediate copepod hosts, and possibly free-living infective worm stages downstream. Bothriocephalus acheilognathi displayed low prevalence and mean abundance in both summer (4.0%, 0.06) and winter (6.5%, 0.07), and it may be difficult to detect seasonal changes due to these low levels. Camallanus cotti prevalence and mean abundance remained relatively constant from the summer of 1995 to the summer of 1999, indicating that levels of this roundworm are stable in Waianu Stream. Whereas B. acheilognathi prevalence and mean abundance were low during the summer of 1995 and the summer of 1997, a dramatic peak in prevalence and mean abundance was observed in the summer of 1998 (41.2%, 1.06), with levels decreasing sharply in the summer of 1999 (4.4%, 0.07). It appears that B. acheilognathi also is present in stable populations at low levels, even though levels rose sharply during a single year.
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host specificity and population structure of two exotic helminths Camallanus cotti nematoda and bothriocephalus acheilognathi cestoda parasitizing exotic fishes in waianu stream o ahu hawai i
Journal of Parasitology, 2003Co-Authors: Amanda G Vincent, William F FontAbstract:Introduction of exotic fishes into Hawai'ian streams has resulted in the simultaneous introduction of exotic parasites. Camallanus cotti (Nematoda) and Bothriocephalus acheilognathi (Cestoda) are the most prevalent and abundant fish helminths in Hawai'ian streams. The population structure and host specificity of C. cotti and B. acheilognathi in exotic poeciliids were examined during May and June 1995 in Waianu Stream, O‘ahu, Hawai'i. Prevalence and mean abundance of C. cotti were significantly different among Poecilia reticulata (65.2%, 1.05), Poecilia mexicana (49.0%, 0.87), and Xiphophorus helleri (32.3%, 0.44). Prevalence of B. acheilognathi was significantly higher in P. mexicana (6.1%) than in P. reticulata (2.1%) and X. helleri (1.6%). However, tapeworm differences in mean abundance were not significant among P. mexicana (0.08), P. reticulata (0.04), or X. helleri (0.03). Nematode and tapeworm prevalence and mean abundance were not significantly different with regard to fish sex. Camallanus cotti pr...
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seasonal dynamics of the helminths of bluegill lepomis macrochirus in a subtropical region
Journal of Parasitology, 2003Co-Authors: Michelle L Steinauer, William F FontAbstract:Seasonal prevalence and abundance of the helminths of bluegill sunfish in a Louisiana oligohaline bayou were measured by a survey and a field “live-box” experiment. The survey took place from the spring of 1997 to the summer of 1998 and examined fish that were <7 cm. Three trematode species, Phagicola nana (Heterophyidae), Ascocotyle tenuicollis (Heterophyidae), and Posthodiplostomum minimum (Diplostomatidae), and 2 nematode species, Camallanus oxycephalus (Camallanidae) and Spinitectus carolini (Cystidicolidae), were examined. Camallanus oxycephalus was the only helminth that showed a distinct seasonal pattern. Abundance and prevalence peaked in summer, which was likely driven by concerted reproductive cycles of females. The survey data indicated that the other helminths fluctuated over time but did not seem to follow a distinct seasonal pattern. The fluctuations could be attributed to the variable nature of the habitat or to the stochastic events that influence transmission dynamics, particularly isolat...
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redescription of Camallanus cotti fujita 1927 nematoda camallanidae from hawai i
Journal of Parasitology, 1997Co-Authors: Mark C. Rigby, William F Font, Thomas L DeardorffAbstract:The freshwater fish parasite Camallanus cotti Fujita, 1927 (Nematoda: Camallanidae) is redescribed from the guppy Poecilia reticulata (Poeciliidae). We confirm previous reports of its occurrence in other introduced poeciliids in Hawai'i, in 4 species of native Hawaiian gobioid stream fishes, and in an elasmobranch, an aquarium-reared stingray Potamotrygon sp. (Dasyatididae) from Hawai'i. Because the source localities of introduced freshwater fish parasites may be far removed geographically from communities that they have invaded, especially oceanic archipelagos (such as Hawai'i), we believe that research on these exotic parasites must be based upon critical taxonomic evaluations. Our redescription of C. cotti serves as a foundation upon which ecological studies of this parasite, performed in conjunction with conservation efforts for native Hawai'ian stream fishes, will be based.
Wilmien J Luuspowell - One of the best experts on this subject based on the ideXlab platform.
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guppies poecilia reticulata introducing an alien parasite Camallanus cotti nematoda camallanidae to africa the first report
Parasitology Research, 2017Co-Authors: Sareh Tavakol, Ali Halajian, Willem J Smit, Andre Hoffman, Wilmien J LuuspowellAbstract:Introduced alien fish species and their associated parasites may result in a serious threat to indigenous biodiversity. Furthermore, this may have negative impacts on cultured fish as well as on native parasitic fauna. In the present study, the invasive Asian nematode, Camallanus cotti Fujita, 1927 (Nematoda: Camallanidae), is reported from the guppy (Poecilia reticulata) for the first time in Africa. This parasite is assumed to be introduced into Africa along with the introduction of exotic poeciliid fishes, which are known to be the most common hosts of C. cotti in ornamental fish industry worldwide.The presence of this parasite in both aquarium-cultured fish as well as fish from natural waterbodies is evidence of the introduction of the alien organisms due to insufficient prophylactic veterinary control during transfer of non-native hosts between countries and the spread of them by the anthropogenic introduction to natural systems.
Gertrud Muller - One of the best experts on this subject based on the ideXlab platform.
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Camallanus emydidius n sp nematoda camallanidae in trachemys dorbigni dumeril bibron 1835 testudines emydidae from southern brazil
International journal for parasitology. Parasites and wildlife, 2017Co-Authors: Carolina Silveira Mascarenhas, Gertrud MullerAbstract:This paper describes a new species of Camallanus found in the freshwater turtle Trachemys dorbigni. Sixty hosts collected in Southern Brazil were examined. All hosts (100%) were parasitized by a new species of Camallanus, which was described as Camallanus emydidius n. sp. The new species differs from other Camallanus species of freshwater turtles mainly because of the morphology of the right spicule, the number of male precloacal and postcloacal papillae, and the presence of "mucrons" in the female posterior extremity.
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Camallanus emydidius n. sp. (Nematoda: Camallanidae) in Trachemys dorbigni (Duméril & Bibron, 1835) (Testudines: Emydidae) from Southern Brazil
Elsevier, 2017Co-Authors: Carolina Silveira Mascarenhas, Gertrud MullerAbstract:This paper describes a new species of Camallanus found in the freshwater turtle Trachemys dorbigni. Sixty hosts collected in Southern Brazil were examined. All hosts (100%) were parasitized by a new species of Camallanus, which was described as Camallanus emydidius n. sp. The new species differs from other Camallanus species of freshwater turtles mainly because of the morphology of the right spicule, the number of male precloacal and postcloacal papillae, and the presence of “mucrons” in the female posterior extremity
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scientific note gastrointestinal helminths of the argentine side necked turtle phrynops hilarii dumeril bibron 1835 testudines chelidae in south brazil
2013Co-Authors: Fabiana Fedatto Bernardon, Ana Luisa Valente, Gertrud MullerAbstract:Parasitological information on the Argentine side-necked turtle, Phrynops hilarii, is scarce. In this paper, we report, for the first time, the occurrence of the nematodes Spiroxys sp., Camallanus sp. and the trematode Cheloniodiplostomum sp. parasitizing Phrynops hilarii in south Brazil.
Sareh Tavakol - One of the best experts on this subject based on the ideXlab platform.
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guppies poecilia reticulata introducing an alien parasite Camallanus cotti nematoda camallanidae to africa the first report
Parasitology Research, 2017Co-Authors: Sareh Tavakol, Ali Halajian, Willem J Smit, Andre Hoffman, Wilmien J LuuspowellAbstract:Introduced alien fish species and their associated parasites may result in a serious threat to indigenous biodiversity. Furthermore, this may have negative impacts on cultured fish as well as on native parasitic fauna. In the present study, the invasive Asian nematode, Camallanus cotti Fujita, 1927 (Nematoda: Camallanidae), is reported from the guppy (Poecilia reticulata) for the first time in Africa. This parasite is assumed to be introduced into Africa along with the introduction of exotic poeciliid fishes, which are known to be the most common hosts of C. cotti in ornamental fish industry worldwide.The presence of this parasite in both aquarium-cultured fish as well as fish from natural waterbodies is evidence of the introduction of the alien organisms due to insufficient prophylactic veterinary control during transfer of non-native hosts between countries and the spread of them by the anthropogenic introduction to natural systems.
L. Ghiraldelli - One of the best experts on this subject based on the ideXlab platform.
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Camallanus maculatus n sp nematoda camallanidae in an ornamental fish xiphophorus maculatus osteichthyes poeciliidae cultivated in sao paulo state brazil
Arquivo Brasileiro De Medicina Veterinaria E Zootecnia, 2007Co-Authors: Mauricio Laterca Martins, Fabiana Garcia, R S Piazza, L. GhiraldelliAbstract:The present study describes Camallanus maculatus n. sp. (Nematoda: Camallanidae) from Xiphophorus maculatus (Osteichthyes: Poecilidae) collected in an ornamental fish farm in Sao Paulo State, Brazil. Thirty-three out of 40 examined fish were parasitized (82% prevalence) with mean intensity of 2.8 (1-20). Male specimens were 3,500µm total length and females 7,100µm total length, provided with orange-brown buccal capsule and two developed tridents. Males showed two unequal spicules, gubernaculum absent and females with vulva situated in the middle of the body. The main characteristics were the sleekly longitudinal ridges in the buccal capsule in both sexes, enlargement at the anterior end of the smaller spicule, the number of genital papillae, longer muscular and glandular portion of esophagus and round tail in female.
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experimental infection in notodiaptomus sp crustacea calanoida with larvae of Camallanus sp nematoda camallanidae
Arquivo Brasileiro De Medicina Veterinaria E Zootecnia, 2007Co-Authors: Mauricio Laterca Martins, E.m. Onaka, L. Ghiraldelli, Fabiana Garcia, R.y. FujimotoAbstract:A viabilidade da infeccao experimental com larvas do nematoide Camallanus sp. em Notodiaptomus sp., crustaceo com potencial para hospedeiro intermediario foi avaliada. Femeas adultas do nematoide foram extraidas de Xiphophorus maculatus (Osteichthyes: Poeciliidae), provenientes de piscicultura de peixes ornamentais no estado de Sao Paulo. As femeas foram ligeiramente pressionadas para liberar as larvas, coletadas com pipeta Pasteur e separadas em placas de Petri contendo 9ml de agua filtrada a 28,1oC do proprio cultivo de zooplâncton. Os tratamentos consistiram de placas contendo 60 e 105 copepodes onde se adicionou 120, 150 e 210 larvas de nematoides em quatro repeticoes. Nos tempos de 24 e 36h apos a exposicao as larvas, os copepodes foram fixados em alcool 70% para quantificacao de larvas. Apos 24h de exposicao, o grupo com 60 copepodes na presenca de 120 larvas apresentou maior prevalencia (46,5%) do que 105 copepodes com 120 larvas (33,2%). Sugere-se que 120 larvas foram suficientes para o sucesso da infeccao. A infeccao experimental mostrou-se viavel, servindo de modelo para o estudo do ciclo de vida de camalanideos e testes de susceptibilidade de hospedeiros.
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Experimental infection in Notodiaptomus sp. (Crustacea: Calanoida) with larvae of Camallanus sp. (Nematoda: Camallanidae) Infecção experimental em Notodiaptomus sp. (Crustacea: Calanoida) com larvas de Camallanus sp. (Nematoda: Camallanidae)
Universidade Federal de Minas Gerais, 2007Co-Authors: M. L. Martins, F. Garcia, L. Ghiraldelli, E.m. Onaka, R.y. FujimotoAbstract:This trial registered the experimental infection viability with nematode larvae Camallanus sp. in Notodiaptomus sp., a crustacean, which can be an intermediate host. Adult females of nematode were dissected from the intestines of Xiphophorus maculatus (Osteichthyes: Poeciliidae), at a fish farm in the State of São Paulo. Females were slightly compressed for larvae release, collected with Pasteur pipette and separated on Petri dishes with 9ml filtered water at 28.1ºC, from zooplankton culture. Treatments consisted of Petri dishes with 60 and 105 copepods, in which 120, 150 and 210 larvae of nematode were added in four replications. Twenty-four and 36h after exposition to the larvae, the copepods were fixed in 70% alcohol to record the amount of fixed larvae. Twenty four hours after exposition, 60 copepods group with 120 larvae showed significantly higher prevalence (46.5%) when compared to 105 copepods and 120 larvae (33.2%). Thus, these answers suggested that 120 larvae were enough for a successful infectivity. Experimental infection was available and so, it was used as a pattern to life cycle studies of camallanid nematodes and hosts susceptibility tests.A viabilidade da infecção experimental com larvas do nematóide Camallanus sp. em Notodiaptomus sp., crustáceo com potencial para hospedeiro intermediário foi avaliada. Fêmeas adultas do nematóide foram extraídas de Xiphophorus maculatus (Osteichthyes: Poeciliidae), provenientes de piscicultura de peixes ornamentais no estado de São Paulo. As fêmeas foram ligeiramente pressionadas para liberar as larvas, coletadas com pipeta Pasteur e separadas em placas de Petri contendo 9ml de água filtrada a 28,1ºC do próprio cultivo de zooplâncton. Os tratamentos consistiram de placas contendo 60 e 105 copépodes onde se adicionou 120, 150 e 210 larvas de nematóides em quatro repetições. Nos tempos de 24 e 36h após a exposição às larvas, os copépodes foram fixados em álcool 70% para quantificação de larvas. Após 24h de exposição, o grupo com 60 copépodes na presença de 120 larvas apresentou maior prevalência (46,5%) do que 105 copépodes com 120 larvas (33,2%). Sugere-se que 120 larvas foram suficientes para o sucesso da infecção. A infecção experimental mostrou-se viável, servindo de modelo para o estudo do ciclo de vida de camalanídeos e testes de susceptibilidade de hospedeiros
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experimental infection in notodiaptomus sp crustacea calanoida with larvae of Camallanus sp nematoda camallanidae infeccao experimental em notodiaptomus sp crustacea calanoida com larvas de Camallanus sp nematoda camallanidae
2007Co-Authors: L. Ghiraldelli, F. Garcia, Caixa PostalAbstract:This trial registered the experimental infection viability with nematode larvae Camallanus sp. in Notodiaptomus sp., a crustacean, which can be an intermediate host. Adult females of nematode were dissected from the intestines of Xiphophorus maculatus (Osteichthyes: Poeciliidae), at a fish farm in the State of Sao Paulo. Females were slightly compressed for larvae release, collected with Pasteur pipette and separated on Petri dishes with 9ml filtered water at 28.1oC, from zooplankton culture. Treatments consisted of Petri dishes with 60 and 105 copepods, in which 120, 150 and 210 larvae of nematode were added in four replications. Twenty-four and 36h after exposition to the larvae, the copepods were fixed in 70% alcohol to record the amount of fixed larvae. Twenty four hours after exposition, 60 copepods group with 120 larvae showed significantly higher prevalence (46.5%) when compared to 105 copepods and 120 larvae (33.2%). Thus, these answers suggested that 120 larvae were enough for a successful infectivity. Experimental infection was available and so, it was used as a pattern to life cycle studies of camallanid nematodes and hosts susceptibility tests.
