Notes on Anomalous American Heterosomata with Descriptions of Five New Records

Dawson, C. E.

doi:10.2307/1439488

Cited by 21 publications

(17 citation statements)

References 7 publications

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“…La frecuencia de estas anomalías, sugiere que estas diferencias estarían relacionadas con el grado de especialización del grupo taxonómico en estudio (Dawson, 1962;Haaker & Lane, 1973;Telders, 1981), siendo más frecuentes en las familias menos especializadas, como Paralichtyidae y Pleuronectidae y menos frecuentemente en las familias derivadas como Soleidae y Cynoglossidae (Amaoka, 1964;Gartner, 1986;Munroe, 1996). La pigmentación en ambos lados del cuerpo, los casos de inversión y los registros de hibridación intergenérica, corresponden a claras manifestaciones de atavismo en el grupo y revelan su origen reciente a partir de ancestros Perciformes relacionados estrechamente con Percoidea (Ivankov et al, 2008).…”

Section: Discussionunclassified

Inversion ocular en Paralichthys adspersus (Steindachner, 1867) lenguado de ojos chicos (Pleuronectiformes, Paralichthyidae): un caso del ambiente y un analisis en ejemplares cultivados

Flores

Martínez

2013

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Inversión ocular enRESUMEN. En diversas especies de Pleuronectiformes se han registrado casos de inversión ocular, fenómeno, en que el individuo reposa en el fondo por el lado contrario al habitual y/o normal. La proporción en que se presenta esta condición es variable y depende de las especies que se analicen. En el género Paralichthys se ha reportado inversión ocular en cuatro especies: P. albigutta, P. orbignyanus, P. californicus y P. dentatus. En el presente trabajo, se informa la captura de un ejemplar silvestre de Paralichthys adspersus (Steindachner, 1867), con inversión ocular, capturado en Caldera (Chile). También, se han reportado individuos invertidos de esta especie provenientes de un cultivo, a partir de reproductores que fueron capturados en Bahía Coquimbo. En ejemplares diestros y siniestros proveniente de cultivo, se efectuó comparación de relaciones morfométricas. La proporción de peces con inversión ocular y que provienen de un cultivo, representa 2,2% de la población de peces producidos. Se discute la frecuencia de este tipo de anomalías y las probables causas que las estarían produciendo. Palabras clave: migración ojos, anormalidad ocular, desarrollo temprano, acuicultura, Coquimbo, Chile. ABSTRACT. In several species of Pleuronectiformes have been cases of ocular reversal, a phenomenon in which the individual lies at the bottom on the opposite side than usual and / or normal. The rate at which this condition occurs is variable and depends on the species analyzed. In the genus Paralichthys reversal has been reported in four species: P. albigutta, P. orbignyanus, P. californicus y P. dentatus. This paper reports a case of reversal in Paralichthys adspersus (Steindachner, 1867) caught in Caldera (Chile). On the other hand is reported for this species reversed individuals from a crop, from broodstock who were captured in Bahia Coquimbo. In right and left specimens from a crop, a comparison was made of morphometric relationships. The proportion of fish with ocular reversal coming from a culture, accounting 2.2% of the population fishes produced. We discuss the frequency of such anomalies and the probable causes that would produce Ocular reversal in

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Section: Discussionunclassified

Inversion ocular en Paralichthys adspersus (Steindachner, 1867) lenguado de ojos chicos (Pleuronectiformes, Paralichthyidae): un caso del ambiente y un analisis en ejemplares cultivados

Flores

Martínez

2013

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“…Here we report on color and head anomalies in two species of American soles, the plainfin sole Achirus declivis Dawson, 1962, Houde, 1971, Koski, 1974, and Gartner, 1986. Head malformations have only been reported for tank-raised A. lineatus (Houde, 1971) and wild T. maculatus (Dawson, 1962;Gartner, 1986).…”

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“…Color abnormalities have been reported for a variety of flatfish species (e.g., Dawson, 1962;White & Hoss, 1964;Taylor et al, 1973;Gartner, 1986;Diaz de Astarloa, 1995, Venizelos & Bennetti, 1999Bolker & Hill, 2000, Chaves et al, 2002, Purchase et al, 2002. Their occurrence in laboratory-reared fishes has been associated with stress during larval metamorphosis, but whether color anomalies result from more general metabolic problems is unclear (Venizelos & Benetti, 1999;Purchase et al, 2002).…”

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“…Secondary coloration could, at least in some cases, be caused by injuries (Gartner, 1986). Animals affected by either abnormality often present aberrations in their scales, in isolation or in groups, with scales larger or smaller than normal or mis-oriented to angles up to 180 o off the typical orientation (Dawson, 1962).…”

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confidence: 99%

“…Head malformations have only been reported for tank-raised A. lineatus (Houde, 1971) and wild T. maculatus (Dawson, 1962;Gartner, 1986).…”

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confidence: 99%

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Ambicoloration and morphological aberration in the sole Achirus declivis (Pleuronectiformes: Achiridae) and two other cases of color abnormalities in achirid soles from southeastern Brazil

2006

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Three cases of color abnormalities and one of morphological aberration in flatfishes of the genus Achirus are described from the Piraquê-Açú River estuary, Espírito Santo, Brazil. One specimen of A. declivis has 75% of the blind side with coloration like that of the ocular side. Another specimen of the same species is strongly hypomelanistic. A third specimen has incomplete eye rotation and a hooked dorsal fin. An ambicolored A. lineatus is also described.Três casos de anormalidades pigmentares e um caso de malformação morfológica são descritos em linguados do gênero Achirus do estuário do Rio Piraquê-Açú, Espírito Santo, Brasil. Um espécime de A. declivis tem 75 % do lado cego com coloração idêntica àquela do lado oculado. Um outro indivíduo desta mesma espécie tem hipomelanização acentuada. Um terceiro espécime tem rotação incompleta do olho e início da nadadeira dorsal em formato de gancho. Um espécime de A. lineatus ambicolorido é também descrito.

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Characteristics of the progression of squamation and the formation of ctenii in the Japanese flounder, Paralichthys olivaceus

Kikuchi

Makino

1990

J. Exp. Zool.

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The progression of squamation and the formation of ctenii in developing juveniles of completely ambicolorate specimens of the Japanese flounder, Paralichthys olivaceus (Temmink et Schlegel), have been examined and compared with those of normally colored fish. The squamation developed with a similar pattern on both the ocular and blind sides of completely ambicolorate fish and of normal fish. In the normal fish, formation of ctenii occurred only on the ocular side and not on the blind side. In the completely ambicolorate fish, the formation of ctenii occurred on both the ocular and the blind side, but the formation of ctenii on the blind side differed from that on the ocular side in both normal and completely ambicolorate fish in terms of both mode and pattern. On the blind side of ambicolorate fish, the formation of ctenii progressed not from the lateral axis as is the case in the normal fish, but from the dorsal and ventral edges just after the formation of ctenii reached the edges on the ocular side, suggesting the diffusion of an unknown factor(s) through the dermal tissue.Most flatfish have different coloration on the right and left sides of their bodies, which result from the presence or absence of melanophores in the dermis of the skin. In the Japanese flounder (Paralichthys oliuaceus), the respective sides are also covered with different types of scales; ctenoid scales are found on the melanized ocular side and cycloid scales on the amelanized blind side.Recently, Japanese flounder have been raised extensively on a commercial scale, for release and/or culture. Among such reared juveniles, fish of anomalous coloration, with so-called hypomelanosis or pseudoalbinism, have appeared in relatively large numbers. In fish with hypomelanosis, the amelanized region on the ocular side is covered with cycloid scales, like the blind side of normal fish. A second type of anomalous coloration often found among the reared fish is ambicoloration. In such fish, irregular melanized patches are distributed on the blind side.Wild fish with ambicoloration have been reported in several species at rare intervals (Kuronuma, '40; Deubler and Fahy, '58; Follett et al., '60; Gray, '60; Dawson, '62; Eisler, '63; Okiyama and Tomi, '70), but no detailed observations on the distribution and morphology of their scales and the development of melanophores have been reported hitherto.Seikai ('80) of the progression of squamation and of the cycloid-ctenoid change in developing reared juveniles with normal coloration and with pseudoalbinism in his study of the Japanese flounder, Paralichthys oliuaceus. On the ocular side, both processes progress from the posterior region along the lateral line toward the anterior and then from the lateral line toward both the dorsal and ventral edges.In the present study, we examined fish with complete ambicoloration, including a few specimens of reversed fish and fish with nonmigrated eyes. In fish with complete ambicoloration, the mode and pattern of the cycloid-ctenoid change are quite differe...

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Notes on Anomalous American Heterosomata with Descriptions of Five New Records

Cited by 21 publications

References 7 publications

Inversion ocular en Paralichthys adspersus (Steindachner, 1867) lenguado de ojos chicos (Pleuronectiformes, Paralichthyidae): un caso del ambiente y un analisis en ejemplares cultivados

Inversion ocular en Paralichthys adspersus (Steindachner, 1867) lenguado de ojos chicos (Pleuronectiformes, Paralichthyidae): un caso del ambiente y un analisis en ejemplares cultivados

Ambicoloration and morphological aberration in the sole Achirus declivis (Pleuronectiformes: Achiridae) and two other cases of color abnormalities in achirid soles from southeastern Brazil

Characteristics of the progression of squamation and the formation of ctenii in the Japanese flounder, Paralichthys olivaceus

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