First record of pughead deformity in <i>Cichla kelberi</i> (Teleostei: Cichlidae), an invasive species in an estuarine system in south‐eastern Brazil

Catelani, Paula Araújo; Bauer, Arthur de Barros; Dario, Fabio Di; Pelicice, Fernando Mayer; Petry, Ana Cristina

doi:10.1111/jfb.13323

Cited by 12 publications

(13 citation statements)

References 22 publications

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“…The occurrence of pughead deformity in the Sparks City Lake redear sunfish population was very low (0.52%). The incidence rate of this deformity was below 1%, coinciding with rates observed in other wild fish populations (Berra & Au, ; Catelani et al, ; Lawler, ). The rarity of this deformity and the infrequency of extreme environmental factors that plausibly contributed to the deformity make it unlikely that this pugheadedness will be widespread in the redear sunfish population.…”

Section: Discussionsupporting

confidence: 83%

“…The W r of the anomalous fish was compared to those of normal fish from the Sparks City Lake population. Body morphometric measurements (nearest 0.1 mm) of head length (L H ), head height (H H ), orbit length (L O ), and orbit height (H O ) were recorded to compare skull dimensions between the normal and pugheaded specimens (Catelani, Bauer, Dario, Pelicice, & Petry, ). Head width (W H ), and horizontal and vertical mouth gape were measured (nearest 0.1 mm) with a micrometer to further compare aspects of skull deformation between the normal and pugheaded fish.…”

Section: Methodsmentioning

confidence: 99%

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First record of pughead deformity in redear sunfish Lepomis microlophus (Günther, 1859)

Porta

Snow

2019

J Appl Ichthyol

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The first record of pughead deformity in redear sunfish Lepomis microlophus is presented based on a single specimen captured from a wild population in a small Oklahoma reservoir. The pugheaded specimen was compared to normal fish from the same population. The pugheaded fish had slightly poorer body condition, although total length was comparable to normal individuals of the same age. Poorer condition may have resulted from difficulty feeding due to incomplete mouth closure and restricted gape caused by severe deformity of the anterior neurocranium and upper jaw. Extreme drought conditions leading to deteriorated water quality during early development may have resulted in the deformity of the redear sunfish. The incidence rate of pugheadedness in this redear sunfish population was below 1%, comparable to rates reported in other wild freshwater fish populations.

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Section: Discussionsupporting

confidence: 83%

Section: Methodsmentioning

confidence: 99%

First record of pughead deformity in redear sunfish Lepomis microlophus (Günther, 1859)

Porta

Snow

2019

J Appl Ichthyol

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“…One hypothesis, which does not seem to have more than anecdotal evidence, is that it occurs specifically when the parasphenoid has become buckled up, forcing the eyes outwards from the center of the skull (Whitley 1944). The orbit and, consequently, the eyes can also become deformed in shape, so that the horizontal diameter is reduced relative to the vertical diameter, making the eyes oval-shaped (Tornier 1908;Gemmill 1912;Catelani et al 2017; Figure 2). Furthermore, deformation of the bones in the orbital region can sometimes cause the eyes to become located closer together and facing more forward than in normal conspecifics (Gudger 1930;Adams and Ryan 1982).…”

Section: Description Of the Deformitymentioning

confidence: 99%

“…Eyes are typically deformed in more severe cases of cranial compression, clearly visible as exophthalmia or oval-shaped eyes (e.g. Tornier 1908;Berinkey 1959;Bortone 1971;Hickey et al 1977;Catelani et al 2017;Jawad and Ibrahim 2019). Eye deformations in aquacultured non-pugheaded hybrid walleyes (Stizostedion vitreus × S. canadensis) leads to impaired mass gain and reduced body condition, suggesting that general performance may be jeopardized by this effect alone (Garcia-Abiado et al 2006).…”

Section: Proximate Performance Implicationsmentioning

confidence: 99%

Pugheadedness in Fishes

Näslund

Jawad

2021

Reviews in Fisheries Science & Aquaculture

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This review summarizes the current state of knowledge of pugheadedness in fish. Records in the scientific literature range from detailed descriptions to brief notes and mere remarks. In total, at least 164 species from 60 families were identified to exhibit pugheadedness, with records published over a span of 465 years (1555 − 2020). The main osteological feature behind pugheadedness appears to be shortening or deformation of the parasphenoid bone, which leads to additional deformations of the ethmovomer-and frontal region. Several other deformations and abnormalities of other cranial bones, eyes, and tongue are occasionally observed, depending on the severity of the pugheadedness. Possible cases in elasmobranchs are also encountered, although the developmental causation may differ from actinopterygians, since their crania have a different organization. Natural cases of pugheadedness are found world-wide, covering a wide range of environments and lifestyles (freshwater-, brackish-and marine environments; benthic, neritic and pelagic species). Cases are found in all life-stages, from embryo to mature adults, suggesting that it does not necessarily lead to early-life mortality. There is some evidence for natural selection acting against pugheaded individuals, likely because of e.g. inappropriately functioning mouth parts, sense organs, and possibly brain deformation. High numbers of pugheads are mainly found in aquaculture, but moderate numbers have been found at some localities also in the wild. Abnormally high occurrence in the wild is commonly attributed to pollution, non-normal water chemistry parameters, or temperature. The causation, however, it typically speculated upon. Based on the reviewed literature, there is support for several causative factors, including genetic mutation and embryonic environmental conditions (toxic and non-toxic) affecting development. Pugheadedness, as the term has been used in the literature, is not a single well-defined pathology, but rather a suite of pathological conditions with similar phenotypic expression.

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“…Like several other vertebrate groups, fishes may display different types of physical abnormalities (e.g., Bhagat & Kumar 2014;Catelani et al 2017), among them those related to color such as different types of albinism (e.g., Nobile et al 2016). A completely albino individual is characterized by pinkish or yellowish color and pink or red eyes (e.g., Sazima & Pombal-Jr. 1986;Oliveira & Foresti 1996;Silva et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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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First record of pughead deformity in Cichla kelberi (Teleostei: Cichlidae), an invasive species in an estuarine system in south‐eastern Brazil

Cited by 12 publications

References 22 publications

First record of pughead deformity in redear sunfish Lepomis microlophus (Günther, 1859)

First record of pughead deformity in redear sunfish Lepomis microlophus (Günther, 1859)

Pugheadedness in Fishes

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

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