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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fauna parasitária e alterações teciduais em peixes oriundos de pisciculturas com mono ou policultivo do médio Vale do Itajaí, SC /

Francisco, Claire Juliana. January 2006 (has links)
Orientador: Flávio Ruas de Moraes / Banca: Gilson Pereira de Oliveira / Banca: Adjair Antônio do Nascimento / Resumo: Avaliou-se no presente trabalho, a fauna parasitária de Oreochromis niloticus, Cyprinus carpio, Hoplias malabaricus, Ictalurus punctatus, Rhandia quelen mantidos em monocultivo ou policultivo. Os peixes foram capturados entre setembro a dezembro de 2004, totalizando 43 peixes, sendo 23 de policultivo e 20 de monocultivo. Houve diferença significativa (P<0,05) na intensidade média e prevalência de monogenoidea, sendo, 196,45(55%) policultivo e 37,16(26%) em monocultivo. Os tricodinídeos apresentaram 136,66(60%) em policultivo e 63,0(13%) em monocultivo. A Lamproglena sp (Lernaiedae) com intensidade e prevalência de 3,14(35%) em policultivo, assim como Lernaea cyprinacea (copepoditos) intensidade e prevalência de 12,85(35%), respectivamente, também em policultivo. Nos mantidos em monocultivo houve relevante presença de Piscinoodinium pillulare, com diferença significativa (p<0,05), intensidade (63,7) e prevalência (43,5%).Um espécime de Lernaea cyprinacea adulta foi encontrado em policultivo e um Argulus sp em monocultivo. Registra-se pela primeira vez a análise comparativa da helmintofauna de peixes mantidos em monocultivo e policultivo da região do médio Vale do Itajaí, SC. / Abstract: The parasitic fauna of the Oreochromis niloticus, Cyprinus carpio, Hoplias malabaricus, Ictalurus punctatus, Rhandia quelen kept in mono and polyculture ponds was evaluated.A total of 43 fishes were captured between september and dezember 2004, 23 from monoculture and 20 from a polyculture system.There was significant difference (P<0,05) in the average intensity and prevalence of the different parasites. For the fishes in the poly and monoculture system the respective values are: monogenoidea, 196,45(55%) and 37,16(26%); Tricodiníds, 136,66(60%) and 63,0(13%); Lamproglena sp. (Lernaiedae). Only in polyculture systems, Lamproglena sp. (Lernaiedae), 3,14(35%) and Lernae cyprinacea (copepoditos), 12,85 (35%) were found.The fishes kept in monoculture systems there was relevant presence of Piscinoodinium pillulare with significant difference (p<0,05), average intensity (63,0) and prevalence (43,5%).An adult specimen of Lernaea cyprinacea was found in the fish from the polyculture pond and one of Argulus sp in the monoculture one. It is reported for the first time the comparative analysis of parasitic fauna in fishes maintained in mono and polyculture ponds in the middle Itajai valley (Santa Catarina, Brazil). / Mestre
2

Helminth ichthyo-parasitic fauna of a South African Sub-Tropical Lake

Matla, Matsoele Moses January 2012 (has links)
Thesis (Ph.D. (Zoology)) --University of Limpopo, 2012 / The diversity of the helminth parasites of fishes in a clear-water, subtropical Lake Tzaneen, in South Africa was investigated. Of the 527 fish specimens sampled approximately 9000 parasites were collected. There are 38 different parasite species discussed comprising 27 Monogenea, 3 Digenea, 4 Cestoda, 3 Nematoda and 1 Acanthocephala. Four new monogenean species are described and these are Dactylogyrus spp. 1 to 4. Three monogenean species are introduced as first records in Africa and these are Actinocleidus fusiformis (Mueller, 1934), Haplocleidus furcatus Mueller, 1937 and Acolpenteron ureteroecetes Fischthal & Allison, 1940. Fourteen monogenean and one acanthocephalan species are discussed as first geographical records for South Africa and these are Gyrodactylus rysavyi Ergens, 1973, Dactylogyrus brevicirrus Paperna, 1973, Dactylogyrus cyclocirrus Paperna, 1973, Dogielius dublicornis Paperna, 1973, Dogielius sp., Schilbetrema quadricornis Paperna & Thurston, 1968, Quadriacanthus aegypticus El Naggar & Serag, 1986, Quadriacanthus clariadis Paperna, 1961, Scutogyrus gravivaginus (Paperna & Thurston, 1969), Cichlidogyrus quaestio Douëllou, 1993, Cichlidogyrus halli Price & Kirk, 1967, Cichlidogyrus sclerosus Paperna & Thurston, 1969, Cichlidogyrus dossoui Douëllou, 1993, Cichlidogyrus tilapiae Paperna, 1960 and Acanthosentis tilapiae Baylis, 1948. Seven species are discussed as first records for their hosts and these are Cichlidogyrus dossoui, Cichlidogyrus halli and Acanthosentis tilapiae on Oreochromis mossambicus; Dactylogyrus sp. 1 on Barbus radiatus and Barbus trimaculatus; Dactylogyrus sp. 2 on Barbus unitaeniatus; Dactylogyrus sp. 3 and Dactylogyrus sp. 4 on Labeo molybdinus. Gyrodactylus rysavyi is the only species with a first site (gills) record. The other monogenean species discussed are Macrogyrodactylus clarii Gussev, 1961, Macrogyrodactylus karibae (Douellou and Chishawa, 1995), Dactylogyrus afrolongicornis afrolongicornis Paperna, 1973, Dactylogyrus allolongionchus Paperna, 1973, Dactylogyrus spinicirrus (Paperna & Thurston, 1968) and Cichlidogyrus philander (Douëllou, 1993). The digeneans discussed are Glossidium pedatum Looss, 1899 and the larvae of Diplostomum van Nordmann, 1832 and Clinostomum Leidy, 1856. The Cestodes discussed are Proteocephalus glanduligerus (Janicki, 1928) Fuhrmann, 1933, Polyonchobothrium clarias Woodland, 1925 and the larvae of Ligula intestinalis Goeze, 1782 and family Gryporhynchidae. The nematodes discussed are Procamallanus laevionchus (Wedl, 1861), Paracamallanus cyathopharynx Baylis, 1923 and larvae of Contracaecum Railliet and Henry, 1912. Monogenea were commonly found on the gills but less on the skin and in the urinary bladder. Digenea were found mainly in the eyes, brain and visceral cavity, with only one species (Glossidium pedatum) present in the intestines of Clarias gariepinus. Cestoda and Nematoda were found in the intestine and body cavity. Only one species of Acanthocephala (Acanthosentis tilapiae) was found in the intestines of Oreochromis mossambicus. No definite seasonal variations of infection and parasite affinities towards the sexes and the sizes of the hosts could be determined. The lake is oligotrophic with the water quality having no influence on the parasite diversity and species richness. / the University of Limpopo Research Office, and the National Research Foundation
3

Fauna parasitária e alterações teciduais em peixes oriundos de pisciculturas com mono ou policultivo do médio Vale do Itajaí, SC

Francisco, Claire Juliana [UNESP] 26 May 2006 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:22:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-05-26Bitstream added on 2014-06-13T20:28:40Z : No. of bitstreams: 1 francisco_cj_me_jabo.pdf: 404375 bytes, checksum: ad2555bf63840b01713a9639cefe7472 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / Avaliou-se no presente trabalho, a fauna parasitária de Oreochromis niloticus, Cyprinus carpio, Hoplias malabaricus, Ictalurus punctatus, Rhandia quelen mantidos em monocultivo ou policultivo. Os peixes foram capturados entre setembro a dezembro de 2004, totalizando 43 peixes, sendo 23 de policultivo e 20 de monocultivo. Houve diferença significativa (P<0,05) na intensidade média e prevalência de monogenoidea, sendo, 196,45(55%) policultivo e 37,16(26%) em monocultivo. Os tricodinídeos apresentaram 136,66(60%) em policultivo e 63,0(13%) em monocultivo. A Lamproglena sp (Lernaiedae) com intensidade e prevalência de 3,14(35%) em policultivo, assim como Lernaea cyprinacea (copepoditos) intensidade e prevalência de 12,85(35%), respectivamente, também em policultivo. Nos mantidos em monocultivo houve relevante presença de Piscinoodinium pillulare, com diferença significativa (p<0,05), intensidade (63,7) e prevalência (43,5%).Um espécime de Lernaea cyprinacea adulta foi encontrado em policultivo e um Argulus sp em monocultivo. Registra-se pela primeira vez a análise comparativa da helmintofauna de peixes mantidos em monocultivo e policultivo da região do médio Vale do Itajaí, SC. / The parasitic fauna of the Oreochromis niloticus, Cyprinus carpio, Hoplias malabaricus, Ictalurus punctatus, Rhandia quelen kept in mono and polyculture ponds was evaluated.A total of 43 fishes were captured between september and dezember 2004, 23 from monoculture and 20 from a polyculture system.There was significant difference (P<0,05) in the average intensity and prevalence of the different parasites. For the fishes in the poly and monoculture system the respective values are: monogenoidea, 196,45(55%) and 37,16(26%); Tricodiníds, 136,66(60%) and 63,0(13%); Lamproglena sp. (Lernaiedae). Only in polyculture systems, Lamproglena sp. (Lernaiedae), 3,14(35%) and Lernae cyprinacea (copepoditos), 12,85 (35%) were found.The fishes kept in monoculture systems there was relevant presence of Piscinoodinium pillulare with significant difference (p<0,05), average intensity (63,0) and prevalence (43,5%).An adult specimen of Lernaea cyprinacea was found in the fish from the polyculture pond and one of Argulus sp in the monoculture one. It is reported for the first time the comparative analysis of parasitic fauna in fishes maintained in mono and polyculture ponds in the middle Itajai valley (Santa Catarina, Brazil).
4

Identificação da comunidade componente de helmintos, gastrointestinais hepáticos, pulmonares, cardíacos e renais de Otaria flavescens (Leão-marinho-do-sul), no litoral sul do Brasil / Identification of component community of helminths in gastrointerstinal tract, liver, lungs, heart and kidneys of Otaria flavescens (Shaw, 1800) southern sea lion, in southern coast of Brazil

PEREIRA, Eliane Machado 15 March 2012 (has links)
Made available in DSpace on 2014-08-20T14:31:28Z (GMT). No. of bitstreams: 1 dissertacao_eliane_machado_pereira.pdf: 4235511 bytes, checksum: 28dcd80ec8888a8603565a7809054107 (MD5) Previous issue date: 2012-03-15 / This study verified helminth parasites infection in gastrointestinal tract, lungs, heart, and kidneys of southern sea lions, Otaria flavescens, from south coast of Rio Grande do Sul State, Brazil. Twenty-nine sea-lions were found dead on the beaches, whose carcasses had mild state of decomposition, were necropsied. The organs were collected during field necropsies for laboratory analyses were 24 small and large intestines, 24 livers including parenchyma and gall bladder, 29 stomachs, 24 hearts, and 24 pairs of kidneys. The organs were maintained frozen at -20°C until their processing. A sieve with 150µm mesh was used for screening the parasites. All content retained was analyzed under stereomicroscope. The helminthes were collected, counted, fixed in AFA, stained with carmine, and clarified in beechwood creosote. The small intestines were divided into three segments that were separately analyzed to record the distribution of helminthes by preference sites. Kolmorogov-Smirnov test was used to verify the type of data distribution. Comparison of mean abundance of infection between age classes was performed through Wilcoxon test at significant level of 0.05. Correlations between infection intensity, sex, total length of the individual, and length of small and large intestines were determined using Pearson s Correlation. Action® software version 1.1 was applied for statistical analyses. Among 29 specimens of O. flavescens 23 were males, three females, and three individuals whose sex could not be determined. The average length of the animals was 2.14±0.31m (1.58 to 2.64m) including 13 sub-adults and 16 adults. A total of 996 specimens of Contracaecum ogmorhini were recorded, especially in the stomach (10.34% of prevalence), 42,145 specimens of Corynosoma australe (100% of prevalence) and 512 of Bolbosoma turbinella (50% of prevalence) were found. Two species of trematodes were found: Stephanophrora uruguayense (Prev. 4.17%) and Ascocotyle (Phagicola) longa (Prev. 33.33% ), a estimated total of 1,988.202 specimens. Cestodes were found in only one of the hosts (4.16% of prevalence) which presented four scoleces. Macroscopically, liver, gall bladder, heart, lungs, and kidneys did not contain parasites. No significant correlation was observed between infection intensity, mean abundance, sex, total length of the host, or length of intestines. Infections levels were similar between sub-adults and adults sea lions. This is the first record of Diphyllobothrium sp., Bolbosoma turbinella, Contracaecum ogmorhini, Ascocotyle (Phagicola) longa, and Stephanoprora uruguayense in O. flavescens in Brazilian waters. As regards parasite fauna of O. flavescens, our data are different from those previously reported for specimens from Pacific coast of South America. / Este estudo analisou os helmintos parasitos gastrointestinais, pulmonares, cardíacos e renais do O. flavescens no litoral sul do Rio Grande do Sul, Brasil. Foram necropsiados 29 leões-marinhos, cujas carcaças apresentavam baixo estado de decomposição. Os órgãos coletados mediante necropsia a campo para análise em laboratório foram 24 intestinos delgado e grosso, 24 fígados incluindo parênquima e vesícula biliar e 29 estômagos, 24 corações e 24 pares de rins. Os órgãos foram congelados a 20oC até o seu processamento. Para a triagem dos parasitos foi usada peneira com malha de 150 µm e todo o conteúdo retido foi analisado sob microscópio estereoscópico. Os helmintos foram fixados em AFA, corados com Carmin e clarificados com creosoto de Faia. Os intestinos delgados foram divididos em três segmentos que foram analisados separadamente para registrar a distribuição dos helmintos por sítios de preferência. Teste de Kolmorogov-Smirnov foi utilizado para verificar tipo de distribuição dos dados. A comparação da abundância média de infecção entre classes etárias foi realizada através do teste de Teste de Wilcoxon usando nível de significância de 0.05. As correlações entre intensidade de infecção, sexo, comprimento total do individuo e comprimento dos intestinos delgado e grosso foram verificadas usando a Correlação de Pearson. Para as análises estatísticas usou-se o software Action® versão 1.1. De 29 espécimes de O. flavescens 23 eram machos, três fêmeas e em três indivíduos o sexo não pode ser determinado. A média do comprimento total dos animais foi 2,14±0,31m (1,58 - 2,64m), sendo 13 subadultos e 16 adultos. Foram registrados 996 espécimes de Contracaecum ogmorhini presentes principalmente no estômago, (prevalência 10%). Registrou-se 42.145 espécimes de Corynosoma australe (Prev. 100%) e 512 de Bolbosoma turbinella (Prev. 50%). Duas espécies de trematódeos foram coletados: Stephanophrora uruguayense (Prev. 4.17% ) e Ascocotyle (Phagicola) longa (Prev. 33.33% ) totalizando 1.988.202 espécimes. Cestódeos foram encontrados em apenas um hospedeiro (Prev. 4,16%) que apresentou 4 escóleces. Macroscopicamente, fígado, vesícula biliar, coração, pulmões e rins examinados não estavam parasitados. Nenhuma correlação significativa foi observada entre a intensidade de infecção, sexo, comprimento total ou comprimento dos intestinos. Este é primeiro registro de Diphyllobothrium sp., Bolbosoma turbinella e Contracaecum ogmorhini em O. flavescens em águas brasileiras. No que se diz respeito à fauna parasitária de O. flavescens, as espécies encontradas no presente estudo não são as mesmas previamente citadas para leãomarinho-do-sul da costa pacífica da América do Sul.
5

Ectoparasitofauna do híbrido tambacu (Colossoma macropomum x Piaractus mesopotamicus) oriundos de pisciculturas da microrregião de Goiânia-GO / Ectoparasitofauna tambacu hybrid (Colossoma macropomum x Piaractus mesopotamicus) originating from fish farms of the region of Goiânia-GO

PEREIRA, Fabricio de Oliveira 29 September 2011 (has links)
Made available in DSpace on 2014-07-29T15:07:35Z (GMT). No. of bitstreams: 1 Dissertacao Fabricio de Oliveira Pereira.pdf: 699034 bytes, checksum: 175530ad5a02968fa2ae67b6021e7aa7 (MD5) Previous issue date: 2011-09-29 / Fish farming has many commercial losses due to diseases. Parasitic diseases account for a large portion of this losses. In Brazil there are records of various parasites causing damage, and in Goiás were not found recent data on the occurrence of parasitic infections in commercial fish farms. This study aimed to identify and establish the occurrence of ectoparasites of tambacu hybrid, raised in commercial fish farms in the microregion of Goiânia-GO. Nine fish farms were evaluated between August and December of 2010, and samples were colected in two separate visits. Fishs were examined by direct microscopy for observation of the parasites. Of the 90 tambacu fish examined 46 (51.11%) were parasitized. It is concluded that hybrid tambacu fishes raised in the Microregion of Goiânia has the following parasites: Monognea sub-class, Trichodina sp.. Piscinoodinium pillulare, copepodids of Lernaea sp. and Dolops sp. / A piscicultura comercial tem muitos prejuízos decorrentes de enfermidades, sendo as doenças parasitárias responsáveis por grande parcela das perdas. No Brasil há registros de vários parasitas causando prejuízos, e em Goiás não foram encontrados dados recentes sobre ocorrência de parasitoses em criações comerciais. O presente trabalho teve como objetivo identificar e estabelecer a ocorrência dos ectoparasitas do híbrido tambacu, criados em pisciculturas comerciais da microrregião de Goiânia-GO. Foram avaliadas 9 pisciculturas entre os meses de agosto e dezembro de 2010, sendo coletadas amostras em duas visitas distintas. Os hospedeiros foram examinados por microscopia direta para observação dos parasitas. Dos 90 exemplares de tambacu examinados 46 (51,11%) estavam parasitados. Conclui-se que peixes híbridos tambacu criados na Microrregião de Goiânia apresenta os seguintes parasitas: Monogenea, Trichodina sp., Piscinoodinium pillulare, copepoditos de Lernaea sp. e Dolops sp..

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