Echinorhynchidae do Brasil: II. Nova espécie do gênero Echinorhynchus Zoega in Müller, 1776

Machado, Daniel Aragão

doi:10.1590/s0074-02761959000200006

Cited by 5 publications

(3 citation statements)

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“…Moreover, the knowledge about parasites community infracommunities and their relationship with the host fish is of great importance, because the parasites also play a key role in ecosystems by regulating the abundance or density of natural fish populations, thus stabilizing food web and host community structures (MOREIRA et al, 2009;MORLEY, 2012;TAVARES-DIAS et al, 2013;OLIVEIRA et al, 2016 (MACHADO, 1959;KRITSKY et al, 1992;COHEN et al, 2013;COSTA-PEREIRA et al, 2014;OLIVEIRA et al, 2016). However, there are no studies on the parasites of T. rotundatus.…”

Section: Communities Of Parasites In Triportheus Rotundatusmentioning

confidence: 99%

First study on communities of parasites in Triportheus rotundatus, a Characidae fish from the Amazon River system (Brazil)

Santos

Tavares‐Dias

2016

Rev. Bras. Parasitol. Vet.

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This study was the first investigation on the parasites of Triportheus rotundatus, a Characiformes fish from the Amazon, in Brazil. All the fish collected (100%) in a tributary from the Amazon River system were infected by one or more parasite species. The mean species richness of parasites was 4.9 ± 0.9, the Brillouin index was 0.39 ± 0.16, the evenness was 0.24 ± 0.09 and the Berger-Parker dominance was 0.81 ± 0.13. A total of 1316 metazoan parasites were collected, including Anacanthorus pithophallus, Anacanthorus furculus, Ancistrohaptor sp. (Dactylogyridae), Genarchella genarchella (Derogenidae), Posthodiplostomum sp. (Diplostomidae), Procamallanus (Spirocamallanus) inopinatus (Camallanidae), Echinorhynchus paranensis (Echinorhynchidae) and Ergasilus sp. (Ergasilidae), but monogenoideans were the dominant parasites. These parasites presented an aggregate dispersion pattern, except for P. (S.) inopinatus, which showed a random dispersion pattern. The body conditions of the hosts were not affected by the parasitism levels. This first report of these parasites for T. rotundatus indicates that the presence of ectoparasites and endoparasites was due to hosts behavior and availability of infective stages in the environment, and this was discussed.Keywords: Amazon, diversity, endoparasites, freshwater fish, infracommunity. ResumoEste estudo foi a primeira investigação sobre os parasitos de Triportheus rotundatus, um Characiformes da Amazônia, no Brasil. Todos os peixes coletados (100%) em um afluente do sistema Rio Amazonas estavam infectados por uma ou mais espécies de parasitos. A riqueza média de espécies de parasitos foi 4,9 ± 0,9, índice de Brillouin 0.39 ± 0,16, equitabilidade 0,24 ± 0,09 e a dominância de Berger-Parker foi 0,81 ± 0,13. Um total de 1.316 parasitos metazoários foram coletados, incluindo Anacanthorus pithophallus, Anacanthorus furculus, Ancistrohaptor sp. (Dactylogyridae), Genarchella genarchella (Derogenidae), Posthodiplostomum sp. (Diplostomidae), Procamallanus (Spirocamallanus) inopinatus (Camallanidae), Echinorhynchus paranensis (Echinorhynchidae) e Ergasilus sp. (Ergasilidae), mas monogenoideas foram os parasitos dominantes. Estes parasitos apresentaram padrão de dispersão agregado, com exceção de P. (S.) inopinatus, que mostrou padrão de dispersão randômico. As condições corporais dos hospedeiros não foram afetadas pelos níveis de parasitismo. Este primeiro relato desses parasitos em T. rotundatus indica que a presença de ectoparasitos e endoparasitos foi devido ao comportamento dos hospedeiros e disponibilidade de estágios infectantes no ambiente, e isso foi discutido.Palavras-chave: Amazônia, diversidade, endoparasitos, peixes de água doce, infracomunidades.

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Section: Communities Of Parasites In Triportheus Rotundatusmentioning

confidence: 99%

First study on communities of parasites in Triportheus rotundatus, a Characidae fish from the Amazon River system (Brazil)

Santos

Tavares‐Dias

2016

Rev. Bras. Parasitol. Vet.

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“…); mounting requires dehydration, which may have caused the distortion of the shape of the proboscis. The egg of A. correalimai has a fibrillar coat and lacks polar prolongations (see Machado-Filho 1970, fig. 2) and the female has a sub-terminal genital pore (see Lampo 1996).…”

Section: Discussionmentioning

confidence: 99%

Pseudoacanthocephalus lutzi (Hamann, 1891) comb. n. (Acanthocephala: Echinorhynchidae) for Acanthocephalus lutzi (Hamann, 1891), parasite of South American amphibians

Arredondo¹,

Pertierra²

2009

FOLIA PARASIT

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Acanthocephalus lutzi (Hamann, 1891) is proposed to be transferred to the genus Pseudoacanthocephalus Petrochenko, 1956 based on the type material from Rhinella marina (L.) from Brazil and recently collected material from R. arenarum (Hensel) from Argentina. Pseudoacanthocephalus is characterised by the following features: a cylindrical trunk without spines, a cylindrical proboscis, testes in tandem, a compact cluster of cement glands, a nearly terminal male genital pore, a ventral and sub-terminal female genital pore, and egg without polar prolongations, containing a holoechinate acanthor. Pseudoacanthocephalus lutzi comb. n. has a proboscis armature of 14-18 longitudinal rows of 5-8 hooks each, with all roots formed by a posteriorly directed longitudinal spatulate sheet having a central rib, and an inconspicuous sheet directed anteriorly; a variable number (4, 5 or 6) of cement glands; a cerebral ganglion located near the base of the proboscis receptacle; digitiform to claviform lemnisci, as long as, or slightly shorter or slightly longer than the proboscis receptacle; a sigmoid-shaped posterior end in males; an egg with a conspicuous fibrillar coat; and one of the larval hooks more robust and different in shape than the others. Additionally, the type material of Acanthocephalus saopaulensis Smales, 2007 from Rhinella icterica (Spix) from Brazil and a paratype of A. caspanensis Fernández et Ibarra Vidal, 1992 from R. spinulosa (Wiegmann) from Chile were studied. Acanthocephalus saopaulensis is considered conspecific with P. lutzi and A. caspanensis is transferred to Pseudoacanthocephalus because it possesses all the characters of the genus mentioned above. The use of characters such as egg morphology and host ecology for distinguishing Acanthocephalus from Pseudoacanthocephalus is also discussed.

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“…For the identification of acanthocephalans, measurements of body characteristics (length and width of the body, proboscis and internal organs) were recorded according to Machado Filho (1959) and Thatcher (2006), with the aid of a microscope with a micrometric eyepiece (values expressed in millimetres). Representative specimens were checked and deposited in the Helminthological Collection of the Institute of Biosciences, UNESP, Botucatu campus (CHIBB no.…”

Section: Methodsmentioning

confidence: 99%

Echinorhynchus gomesi Machado Filho, 1948 infecting the Patinga hybrid (♀ Piaractus mesopotamicus × ♂ Piaractus brachypomus ) in fish farms in Mato Grosso do Sul, Brazil

2020

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The fish farms state of Mato Grosso do Sul (Brazil) have been facing commercialization problems of the Patinga (Piaractus mesopotamicus (Holmberg, 1887) × Piaractus brachypomus (Cuvier, 1818)) due to hight acanthocephalans infection. The aim of this study was to identify the acanthocephalan species that infect this hybrid and assess the influence of management practices on the intensity of the parasite in fish farms. Samples were collected between October 2017 and June 2018. The transparency was the only water quality parameter that differed among the fish farms, and the values were below the limit established for fish production. Echinorhynchus gomesi was recorded in fish farms A, B and C. There was no significant correlation between the intensity of E. gomesi infections and the length of the intestine, and the standard length of the fish. The intensity of E. gomesi also did not affect the condition of the fish. The results of the study demonstrated that inappropriate management, such as cascading tanks, partial emptying of tanks and successive cultivations without time intervals, created conditions for the establishment of the population of E. gomesi in the evaluated fish farms.

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Echinorhynchidae do Brasil: II. Nova espécie do gênero Echinorhynchus Zoega in Müller, 1776

Cited by 5 publications

References 0 publications

First study on communities of parasites in Triportheus rotundatus, a Characidae fish from the Amazon River system (Brazil)

First study on communities of parasites in Triportheus rotundatus, a Characidae fish from the Amazon River system (Brazil)

Pseudoacanthocephalus lutzi (Hamann, 1891) comb. n. (Acanthocephala: Echinorhynchidae) for Acanthocephalus lutzi (Hamann, 1891), parasite of South American amphibians

Echinorhynchus gomesi Machado Filho, 1948 infecting the Patinga hybrid (♀ Piaractus mesopotamicus × ♂ Piaractus brachypomus ) in fish farms in Mato Grosso do Sul, Brazil

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