First report of albinism in the South American catfish Imparfinis mirini (Siluriformes: Heptapteridae)

Manoel, Pedro Sartori; Ono, Erika Ramos; Alves, Maria Ines Bulgari

doi:10.1016/j.rmb.2017.01.030

Cited by 7 publications

(11 citation statements)

References 8 publications

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“…Complete or true albinos are rarely reported for the Neotropics, and most of them are catfishes (Siluriformes) belonging to several families including Callichthyidae, Doradidae, Heptapteridae, Loricariidae, and Trichomycteridae (del Barco & Panattieri 1980;Carvalho & de Pinna 1986;Sazima & Pombal-Jr. 1986;Burgess 1989;Brito & Caramaschi 2005;Manoel et al 2017). There are two records of complete albinos in Gymnotidae (Campos-da-Paz & Caramaschi 1994;Oliveira & Foresti 1996) and one in Erythrinidae (Silva et al 2013).…”

Section: Resultsmentioning

confidence: 99%

“…The gymnotid and erythrinid fishes have nocturnal behavior, as is the case of most catfishes, a trait that may favor the survival of albino individuals in a natural environment (Sazima & Pombal-Jr. 1986). Cambeva guareiensis, like most trichomycterid species (Arratia & Huaquín 1995;de Pinna & Wosiacki 2003) is mostly nocturnal and cryptic, which favors its survival face to diurnal, visually hunting predators, as previously suggested for small albino catfishes in general (Sazima & Pombal-Jr. 1986;Brito & Caramaschi 2005;Manoel et al 2017).…”

Section: Resultsmentioning

confidence: 99%

“…We take the opportunity to clear the facts about I. mirini albinos (Sazima & Pombal Jr. 1986;Manoel et al 2017), and recommend that the word "first" should be used with care whatever the case or occurrence reported.…”

Section: Discussionmentioning

confidence: 99%

“…later recognized the specimen as Imparfinis mirini Haseman, 1911 (Figure 3). Unaware of this situation, Manoel et al (2017) reported on a first case of albinism in I. mirini, when the supposed R. minuta was, indeed, the first record of albinism the former species.…”

Section: Addendummentioning

confidence: 99%

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A case of complete albinism in the catfish Cambeva guareiensis (Siluriformes: Trichomycteridae)

et al. 2020

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Albinism has been recorded in Neotropical freshwater fishes, mostly for nocturnal or cryptobiotic species. We report herein a case of albinism in the catfish Cambeva guareiensis (Trichomycteridae) from the Guareí River basin, Upper Paraná River basin, southeastern Brazil. The albino fish was caught with seven individuals with typical color pattern of the species. The features of the albino fish in life and shortly after preservation are described and illustrated.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Addendummentioning

confidence: 99%

See 2 more Smart Citations

A case of complete albinism in the catfish Cambeva guareiensis (Siluriformes: Trichomycteridae)

et al. 2020

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“…A pesar de la enorme diversidad de peces de Suramérica, los reportes de aberraciones cromáticas son muy escasos. Se han reportado 18 casos de aberraciones cromáticas en especies de peces dulceacuícolas de las familias Erythrinidae, Gymnotidae, Doradidae, Heptapteridae, Pimelodidae, Callichthyidae, Loricariidae, Atroblepidae y Lepidosirenidae, de los cuales la mayoría corresponden a casos de albinismo reportados en Brasil y Argentina (Nobile et al, 2016;Manoel et al, 2017). En Ecuador se han reportado casos de leucismo únicamente en poblaciones aisladas de astroblépidos de la cuenca del río Mira al noroccidente (Mena-Valenzuela & Valdiviezo-Rivera, 2016).…”

Section: Introductionunclassified

Leucismo en el pez Lebiasina bimaculata (Characiformes: Lebiasinidae) en Guayas, Ecuador

Nugra¹,

Anaguano‐Yancha²,

Arízaga³

et al. 2018

Biota

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El leucismo es una aberración cromática poco frecuente, manifestada por la ausencia total o parcial de melanina en la piel. Este estudio reporta un caso de leucismo en el pez Lebiasina bimaculata (Characiformes: Lebiasinidae), en el río Chongón, Ecuador. El individuo con leucismo presentó despigmentación en todo el cuerpo, excepto en el iris y en la base de la tercera escama de la cuarta serie de escamas longitudinales. Con este suman 19 los registros de aberraciones cromáticas en peces dulceacuícolas de Suramérica. Palabras clave. Aberraciones pigmentarias. Characiformes. Peces dulceacuícolas. Río Guayas.

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Pupil size variation as a response to stress in European catfish and its application for social stress detection in albino conspecifics

et al. 2020

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Hormonal changes such as increased cortisol level in blood plasma in response to stress and social environmental stimuli are common among vertebrates including humans and typically accompanied by other physiological processes, such as changes in body pigmentation and/or pupil dilatation. The role of pupil size variation (PSV) as a response to stress have yet to be investigated in fish. We exposed albino and pigmented European catfish to short-term stress and measured changes in pupil size and cortisol level. Albinos showed lower pupil dilatation and higher cortisol levels than did pigmented conspecifics. A clear positive relationship between pupil dilatation and cortisol concentrations was observed for both pigmented and albino specimens, suggesting that PSV can be used as a stress indicator in fish, irrespective of albino’s inability to express social communication by coloring. During the follow-up, we investigated whether a penultimate contest between albino individuals would impact contestants’ social stress during subsequent contact. We observed PSV during the contact of unfamiliar albino catfish with different penultimate experiences (winner (W) and/or loser (L)). Then, the following treatment combinations were tested: WW, WL and LL. Twenty-four-hour contact of two unfamiliar catfish resulted in higher pupil dilatation among individuals with previous winner experience. Among treatment combinations, a WL contest displayed the highest pupil dilatation for winners. PSV reflected socially induced stress in individuals that was accompanied by the “winner” experience and dominancy in albinos. To conclude, the present study validates pupil dilatation as a non-invasive method to evaluate stress level in pigmented as well as albino fish in various contexts.

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First report of albinism in the South American catfish Imparfinis mirini (Siluriformes: Heptapteridae)

Cited by 7 publications

References 8 publications

A case of complete albinism in the catfish Cambeva guareiensis (Siluriformes: Trichomycteridae)

A case of complete albinism in the catfish Cambeva guareiensis (Siluriformes: Trichomycteridae)

Leucismo en el pez Lebiasina bimaculata (Characiformes: Lebiasinidae) en Guayas, Ecuador

Pupil size variation as a response to stress in European catfish and its application for social stress detection in albino conspecifics

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