Parasitic castration, growth, and sex steroids in the freshwater bonefish Cyphocharax gilbert (Curimatidae) infested by Riggia paranensis (Cymothoidea)

Lima, Neuza Rejane Wille; Azevedo, Juliana de Souza; Silva, Leonardo G. da; Dansa-Petretski, Marı́lvia

doi:10.1590/s1679-62252007000400006

Cited by 13 publications

(18 citation statements)

References 35 publications

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“…Riggia nana Szidat and Schubart, 1960 Leporinus striatus; pouches in body cavity; São Paulo (Szidat and Schubart 1960;Lemos de Castro and Loyola e Silva 1985;Brasil-Lima and Barros 1998;Eiras et al 2010). Riggia paranensis Szidat, 1948 Curimata platana, Cyphocharax gilbert; pouches in body cavity; freshwater; Paraná, Rio de Janeiro (Szidat 1948;Bastos and Thatcher 1997;Azevedo et al 2002;2006;Lima et al 2007;Eiras et al 2010 Ringuelet, 1943 Salminus brasiliensis; body surface, gills; freshwater; unspecified locality (Ringuelet 1943;Yamaguti 1963;Thatcher 2006;Eiras et al 2010). Argulus paulensis Wilson, 1924 Salminus brasiliensis, S. hilarii; body surface, gills; freshwater; São Paulo (Wilson 1924;Yamaguti 1963;Eiras et al 2010).…”

Section: Mothocya Bohlkeorum Williams and Williams 1982mentioning

confidence: 99%

Checklist of Crustacea parasitizing fishes from Brazil

Luque¹,

Vieira²,

Takemoto³

et al. 2013

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Materials and MethodsThe list of parasitic crustaceans of fishes in Brazil was based on extensive search of published records. This bibliographic review of the crustacean species reported from fishes in Brazilian waters was complemented with information from the Zoological Record, Biological Abstracts, Web of Knowledge, Google Scholar, Aquatic Sciences and Fisheries Abstracts, Biological and Agricultural Index Plus and the Scopus. Data were compiled until March, 2013. In the case of parasitic copepods, only information not presented in the checklist of Copepoda parasites of fishes from Brazil by Luque and Tavares (2007) was included. The number of parasitic associations was calculated from the sum of the richness of species of parasites on each host species.The checklist follows the classification and systematic arrangement proposed by Boxshall and Halsey (2004) for Copepoda, and Young (1998) and Martin and Davis (2001) for other crustacean groups.The species of crustaceans are arranged according to taxonomic categories, within which the species are presented in alphabetical order, followed by hosts (specific name), site of infection, habitat, localities and references (between parentheses, in chronological order). In addition, the checklist also includes crustacean species identified only at the genus level and undetermined species. Crustacean names presented in the checklist follow the most recent taxonomic literature, but validity of individual taxa or reliability of their records was not critically examined by the present authors. Host species were arranged in taxonomic and then alphabetical order.The key to identification of the genera of parasitic crustaceans from fishes in Brazil has been produced on the basis of those by Delaney

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Section: Mothocya Bohlkeorum Williams and Williams 1982mentioning

confidence: 99%

Checklist of Crustacea parasitizing fishes from Brazil

Luque¹,

Vieira²,

Takemoto³

et al. 2013

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“…Fish were maintained in cold water (0ºC, 5 min.) to reduce sensitivity (Lima et al, 2007), sacrificed by decapitation and classified by the presence of the parasite, by sex (male or female), and by gonadal development (initial development, maturating, mature, postspawning, and inhibited by position, color and size of gonads), according to Azevedo et al (2002). Parasites were removed from the host-produced capsule in the pericardial area to determine their total length (mm -distance from the tip of head to the end of the telson).…”

Section: Methodsmentioning

confidence: 99%

“…This species is commonly found in coastal drainages of eastern Brazil, being distributed in rivers and lagoons of the states of Bahia, Espírito Santo and Rio de Janeiro (Vari, 1992) and shows the highest fecundity among the known members of the Curimatidae (Azevedo et al, 1938). The populations of this species have a spawning period of two annual reproductive cycles, beginning in February and August Lima et al, 2007). However, C. gilbert shows parasitic castration when infested by the crustacean R. paranensis, being unable to reproduce (Azevedo et al, , 2006Gomes da Silva et al, 2005;Lima et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The populations of this species have a spawning period of two annual reproductive cycles, beginning in February and August Lima et al, 2007). However, C. gilbert shows parasitic castration when infested by the crustacean R. paranensis, being unable to reproduce (Azevedo et al, , 2006Gomes da Silva et al, 2005;Lima et al, 2007). Infested fish lack gonadal development and two sex-specific proteins in the plasma (Gomes da , and they have low levels of sex steroids (Lima et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…However, C. gilbert shows parasitic castration when infested by the crustacean R. paranensis, being unable to reproduce (Azevedo et al, , 2006Gomes da Silva et al, 2005;Lima et al, 2007). Infested fish lack gonadal development and two sex-specific proteins in the plasma (Gomes da , and they have low levels of sex steroids (Lima et al, 2007). The prevalence of parasitism in the fish C. gilbert varies from place to place, but it is around 60% in the middle Itabapoana River (Azevedo et al, , 2006, an area that became a target for gold mining in the middle 1980's (Malm et al, 1989b;Torres et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Mercury concentration in the freshwater bonefish Cyphocharax gilbert (Curimatidae) and its parasite the crustacean Riggia paranensis (Cymothoidae)

Lins¹,

Meirelles

Malm

et al. 2008

Neotrop. ichthyol.

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Fish parasites can accumulate heavy metals reaching higher concentrations than the host and may affect the host's bioaccumulation. The present study compared total mercury concentration in the liver and muscle of Cyphocharax gilbert and in the parasite Riggia paranensis sampled in the middle Itabapoana River, Brazil, also considering the reproductive stages of both fish and parasite. Mean concentrations of mercury in muscle of fish varied from 20.8 ng.g -1 in mature females to 38.1 ng.g -1 in postspawning females. The mean concentrations in fish liver varied from 60.9 ng/g in post-spawning females to 110.4 ng.g -1 in infested males. The mean concentration of mercury in parasites varied from 26.2 ng.g -1 in specimens carrying early embryo to 39.5 ng.g -1 in specimens with eggs. Positive and significant associations (P≤0.05) were found between the total mercury concentrations in parasites and muscle of host (both females and males), and between concentrations in parasites and in the liver of male hosts. These results suggest that R. paranensis can be used to indicate mercury levels in edible parts of C. gilbert.Parasitos de peixes podem acumular metais pesados em concentrações acima dos hospedeiros, podendo afetar a bioacumulação nestes. O presente estudo comparou a concentração total do mercúrio no fígado e no músculo de Cyphocharax gilbert e no parasito Riggia paranensis, coletados no trecho médio do rio Itabapoana, Brasil, considerando o estágio reprodutivo tanto dos peixes como dos parasitos. A concentração média do mercúrio nos músculos dos peixes variou entre 20,8 ng.g -1 nas fêmeas maturas e 38,1 ng.g -1 nas fêmeas desovadas. As concentrações médias nos fígados dos peixes variaram entre 60,9ng/g em fêmeas desovadas e 110,4 ng.g -1 em machos parasitados. Entre os parasitos, as concentrações médias de mercúrio variaram entre 26,2 ng.g -1 em espécimes com embriões iniciando o desenvolvimento to 39,5 ng.g -1 em espécimes com ovos . Associações positivas e significativas (P≤0.05) foram encontradas entre as concentrações totais de mercúrio em parasitos e músculos dos hospedeiros (tanto em macho como em fêmeas) e entre as concentrações nos parasitos e os fígados dos hospedeiros machos. Estes resultados sugerem que o parasito R. paranensis pode ser utilizado como bioindicador dos níveis de mercúrio nas partes comestíveis de C. gilbert.

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