Copepods and fishes in the Brazilian Amazon

Thatcher, Vernon E.

doi:10.1016/s0924-7963(97)00043-2

Cited by 16 publications

(11 citation statements)

References 20 publications

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“…Many parasitic crustacean species have preferences for particular sites on hosts in comparison with others (FRYER, 1968;DOUELLOU & ERLWANGER, 1994;CARVALHO et al, 2004;THATCHER, 1998THATCHER, , 2006TAVARES-DIAS et al, 2011SMIT et al, 2014), but this degree of restriction varies among parasite species. Thus, we found that while the lernaeid P. gamitanae infested only the oral cavity and gills of its host characids, L. cyprinacea is a parasite with low specificity that prefers the integument and gills of its hosts.…”

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

“…These results clearly showed a change of site preference in C. macropomum, for some unknown reason. Both feeding and attachment sites probably play important roles in the distribution of native ectoparasite crustaceans in host fish (FRYER, 1968;DOUELLOU & ERLWANGER, 1994;THATCHER, 1998THATCHER, , 2006CARVALHO et al, 2004;SMIT et al, 2014). Thus, one important reason why parasites prefer specific sites may relate to more effective use of resources such as food, the host species available and the vulnerability of the attachment site.…”

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

“…For ectoparasitic crustaceans in fish populations, infestation levels are determined by factors operating during and after transmission, particularly those relating to the characteristics of the host, parasite and environment (FRYER, 1968;DOUELLOU & ERLWANGER, 1994;THATCHER, 1998;CARVALHO et al, 2004;MARQUES & CABRAL, 2007;ANEESH et al, 2013). A significant positive correlation between the mean intensity and the mean abundance was found in the dataset analyzed here, whereas prevalence only showed weak positive correlations with the mean intensity and mean abundance of infestation.…”

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

“…Although the water temperature does not vary much in this basin during the year, the water levels, pH and dissolved oxygen levels can change dramatically, thereby influencing the floodplains, lakes and aquatic communities, including fish, parasites, vegetation, etc. Thus, when the water level in the Rivers is low and the floodplains are exposed and lakes become shallow, the aquatic animals, including crustaceans and fish, become concentrated (THATCHER, 1998(THATCHER, , 2006. Therefore, it can be expected that these environmental factors will also have a strong influence on parasite diversity, including that of parasitic crustacean species.…”

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

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Distribution pattern of crustacean ectoparasites of freshwater fish from Brazil

Tavares‐Dias

Dias-Júnior

Florentino

et al. 2015

Rev. Bras. Parasitol. Vet.

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The purpose of this study was to use the informations relating to parasite crustaceans species that was published over the course of one century (1913 to 2013), in order to search for infestation and distribution patterns among these ectoparasites in Brazilian freshwater fish species. This search was carried out on 445 samples of 119 host fish of 27 families within the orders Characiformes, Perciformes, Clupeiformes, Mugiliformes, Osteoglossiformes, Symbranchiformes, Tetraodontiformes and Siluriformes from various regions of Brazil. We organized different host-parasite systems into matrices grouping species at different taxonomic and infestation levels and according to host parameters. Five families of parasites (Ergasilidae, Argulidae, Lernaeidae, Lernaeopodidae and Cymothoidae) distributed into 76 species of 27 genera were analyzed in the host samples, which presented dominance of Ergasilidae species, mainly from the genus Ergasilus. Some crustaceans are host and site-specific, especially in relation to fish in particular habitats and lifestyles (e.g. Perulernaea gamitanae, Anphira branchialis and Riggia paranensis), while other parasites frequently have no preference (e.g. Lernaea cyprinacea and Braga patagonica). We found broadly similar distribution patterns for some crustacean species among the different localities, whereas other species showed well-defined geographical patterns, and these findings were discussed.Keywords: Amazon, Branchiura, Copepoda, host, Isopoda, parasite. ResumoO objetivo deste estudo foi utilizar as informações relacionadas com espécies de crustáceos parasitas, que foram publicados durante um século (1913 a 2013), para procurar padrões de infestação e distribuição desses ectoparasitos em espécies de peixes de água doce do Brasil. Esta pesquisa foi realizada em 445 amostras de 119 peixes hospedeiros de 27 famílias de Characiformes, Perciformes, Clupeiformes, Mugiliformes, Osteoglossiiformes, Symbranchiformes, Tetraodontiformes e Siluriformes das diversas regiões do Brasil. Foram organizados em matrizes de agrupamento diferentes sistemas parasito-hospedeiros em diferentes níveis taxonômicos, níveis de infestação e parâmetros dos hospedeiros. Cinco famílias (Ergasilidae, Argulidae, Lernaeidae, Lernaeopodidae e Cymothoidae) de parasitos, distribuídos em 76 espécies de 27 gêneros, foram analisados em amostras dos hospedeiros, que apresentaram dominância de espécies Ergasilidae principalmente do gênero Ergasilus. Alguns crustáceos são hospedeiros e sítios-específicos no hospedeiro, especialmente peixes de determinados hábitat e estilo de vida (por exemplo, Perulernaea gamitanae, Anphira branchialis e Riggia paranensis), enquanto outros parasitos não têm qualquer preferência (por exemplo, Lernaea cyprinacea e Braga patagonica). Foram encontrados padrões muito semelhantes na distribuição de algumas espécies de crustáceos entre as diferentes localidades, enquanto outras espécies mostraram um padrão geográfico bem definido, o que foi discutido aqui.

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Section: Host-parasite Distribution Patternmentioning

confidence: 99%

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

Section: Host-parasite Distribution Patternmentioning

confidence: 99%

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Distribution pattern of crustacean ectoparasites of freshwater fish from Brazil

Tavares‐Dias

Dias-Júnior

Florentino

et al. 2015

Rev. Bras. Parasitol. Vet.

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“…Granulocytes contribute to wound healing in carp Cyprinus carpio (Iger & Abraham, 1990) and have been reported to be part of the trout immune response to parasitic infections (Sharp et al, 1989). The presence of metazoan parasites in species of sedentary catfishes, astroblepids, callichthyids, hypophthalmids, and loricariids, including Ancistrus from tropical (Amazon) and sub-tropical South American streams has been documented (Freihofer & Neil, 1967;Kohn & Cohen, 1998;Thatcher, 1998). Thus, the presence of EGCs in appreciable amount in the epidermis of Ancistrus can be seen as a system that destroys such multicellular parasites.…”

Section: Discussionmentioning

confidence: 99%

Histochemistry and functional organization of the dorsal skin of Ancistrus dolichopterus (Siluriformes: Loricariidae)

et al. 2010

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The structural organization and histo-cytochemical features of dorsal skin of Ancistrus dolichopterus (acari bodo) are the main focus of this work. The epidermis, dermis and subcutis are the principal layers of the skin. The epidermis mainly consists of epithelial and mucous cells. Interspersed between them are lymphocytes, pigment cells, eosinophilic granular cells (EGC), and the taste buds as sensory structures. The high number of EGCs is implicated in general and specific immunological defense from pathogenic bacteria and multicellular parasites. The epithelial cells and mucous cells contain glycoproteins with oxidizable vicinal diols, carboxyl groups and O-sulphate esters and their high secretory activity is correlated with the bottom dwelling habit of this species. A thick stratum laxum contains overlapping osteoderms bearing denticles, and the stratum compactum make the integument thicker to help the fish in negative buoyancy for maneuvering near the bottom and protection. The entire body surface is covered by conical, backwardly directed denticles. These are composed of a dentine cone, surrounding a pulp cavity with the top covered by mineralized cap, and are the true homologues of teeth. These structures provide effective protection from abrasion and enemies. These structural peculiarities and histochemical features indicate additional physiological role of the skin of A. dolichopterus.A organização estrutural e aspectos histo-citiquímicos da pele dorsal de Ancistrus dolichopterus (acari-bodó) são os principais alvos do presente estudo. A epiderme, a derme e a hipoderme são as principais camadas da pele. A epiderme consiste principalmente de células epiteliais e mucosas. Intercalados entre elas estão os linfócitos, as células pigmentares, as células granulares eosinofílicas (CGE), e as papilas gustativas como estruturas sensoriais. Um grande número de CGEs está relacionado em geral com a defesa imunológica específica de bactérias patogênicas e parasitas multicelulares. As células epiteliais e as células mucosas contem glicoproteínas com grupos diol oxidáveis, grupos carboxilas e ésteres O-sulfatados sendo que sua alta atividade secretória está correlacionada com o comportamento bentônico, de fundo, dessa espécie. Um espesso stratum laxum contém osteodermos sobrepostos, parecidos com dentículos, e o stratum compactum que torna o tegumento mais espesso, contribuindo com a flutuação negativa necessária ao movimento perto do fundo e proteção. Toda a superfície do corpo é coberta por dentículos cônicos retrodirecionados. Esses dentículos são compostos por um cone de dentina, envolvendo uma cavidade pulpar e com o ápice coberto por uma capa mineralizada, verdadeiros homólogos dos dentes. Essas estruturas oferecem efetiva proteção contra abrasão e oponentes. Essas peculiaridades estruturais e aspectos histoquímicos sugerem a existência de uma função fisiológica adicional para a pele de A. dolichopterus.

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Fish Disease

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Copepods and fishes in the Brazilian Amazon

Cited by 16 publications

References 20 publications

Distribution pattern of crustacean ectoparasites of freshwater fish from Brazil

Distribution pattern of crustacean ectoparasites of freshwater fish from Brazil

Histochemistry and functional organization of the dorsal skin of Ancistrus dolichopterus (Siluriformes: Loricariidae)

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