Pectoral fin anomalies in the long-tailed butterfly ray, Gymnura poecilura collected from Nagapattinam coastal waters, south-east coast of India

Suresh, T.; Raffi, S.M.

doi:10.1017/s1755267212000759

Cited by 9 publications

(9 citation statements)

References 7 publications

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“…Genetic disorders were also suggested as underlying cause (Tortonese 1956). The present report is interesting in view of a similar description for such a pectoral fin anomaly in G. poecilura by Suresh and Raffi (2012). The analogy of the two cases is prominent in shape, location, and texture.…”

Section: Discussionsupporting

confidence: 74%

“…Locomotion and manoeuvrability will be affected by the different shaped pectoral fin. The radiographic image in the study of Suresh and Raffi (2012) showed that the pectoral fin propterygium was not curved towards the neurocranium in way of the splanchnocranium. Instead, a bigger radius was observed pointing the propterygium towards the tip of the snout.…”

Section: Discussionmentioning

confidence: 92%

“…Congenital abnormalities for the genus Gymnura (Hasselt, 1823) have been reported in the smooth butterfly ray Gymnura micrura (Bloch & Schneider, 1801) from the Amazonia (Nunes and Piorski 2009), and the long-tailed butterfly ray Gymnura poecilura (Shaw, 1804) from South India and Sri Lanka (Bennet 1964;Day 1878;Easwaran 1967;Suresh and Raffi 2012) (Table 1).…”

Section: Introductionmentioning

confidence: 99%

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Morphological and functional abnormality in the spiny butterfly ray Gymnura altavela

Narváez¹,

Osaer²

2016

Mar Biodivers Rec

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Background: A variety of abnormalities have been described for sharks, rays and skates across different ecoregions. Morphological and functional anomalies in these species, however, were not yet documented in distributions from the Canary Islands, the spiny butterfly ray Gymnura altavela (Linnaeus, 1758) and from in situ observations. The aim of the present study is to fill these knowledge gaps.Results: A female spiny butterfly ray G. altavela with an unfused anterior part of the right pectoral fin to the neurocranium was observed in the port of Sardina del Norte (Gran Canaria Island) during a visual scuba diving census. Conclusion: The size and the observation of the activities swimming, burying and preying confirmed the adaption of the specimen for the anomaly and underdeveloped electrosensory system in its survival. The limited knowledge of teratogens and their triggering factors, and the striking similarity with an anomaly reported for G. poecilura (Shaw, 1804) from South India, suggest genetic expression aberrations or mechanical obstructions during gestation as origin for the disorder.

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Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Morphological and functional abnormality in the spiny butterfly ray Gymnura altavela

Narváez¹,

Osaer²

2016

Mar Biodivers Rec

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“…There is scant information available in the literature of anomaly cases in butterfly rays for individuals above the size of birth. Three instances document an unfused right pectoral fin to the snout (Suresh & Raffi 2012;Narváez & Osaer 2016; the present study) that were similar in sex, shape, location, and texture. Two cases described a dorsal fold on the tail (Nunes & Piorski 2009) and one an absent tip of the snout (Béarez et al 2008).…”

Section: Rostral Anomaly In a Juvenile Spinysupporting

confidence: 52%

“…The first record of an anomaly in this species was described by Narváez & Osaer (2016) for an adult female observed in 2007 and 2008 in the northwest of the Island of Gran Canaria (Canary Islands, Spain). This observation was also remarkable for its similarity, prominent in sex, shape, location, and texture, with the partial lack of the disc in way of the rostrum in the Long-tailed Butterfly Ray G. poecilura from the western Indo-Pacific (Suresh & Raffi 2012).…”

Section: Rostral Anomaly In a Juvenile Spinymentioning

confidence: 82%

<b>Rostral anomaly in a juvenile Spiny Butterfly Ray <I>Gymnura altavela</I> (Linnaeus, 1758) (Elasmobranchii: Myliobatiformes: Gymnuridae) from the Canary Islands</b>

Osaer¹,

Narváez²

2018

J. Threat. Taxa

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The present communication documents the first observation of a morphologic anomaly in a juvenile Spiny Butterfly Ray Gymnura altavela. This observation is interesting for its similarity with a rostral abnormality in an adult G. altavela from the Canary Islands 10 years earlier and with the one from a juvenile Long-tailed Butterfly Ray G. poecilura from the Western Indo-Pacific. Although no firm conclusions can be drawn from these records, it reinforces the hypothesis of a congenital disorder for this type of malformation within the genus. The individual appeared to have successfully adapted for its anomaly, suggesting that these instances are not of major conservation concern. Hence, long-term studies are required to monitor anomaly occurrences and to evaluate their potential threats.

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Morphological Abnormalities of Indian Ring Skate, Orbiraja powelli (Alcock, 1898) (Rajiformes: Rajidae) Collected in the Southwest Coast of India

Bhagyalekshmi

Kumar

2019

Thalassas

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Pectoral fin anomalies in the long-tailed butterfly ray, Gymnura poecilura collected from Nagapattinam coastal waters, south-east coast of India

Cited by 9 publications

References 7 publications

Morphological and functional abnormality in the spiny butterfly ray Gymnura altavela

Morphological and functional abnormality in the spiny butterfly ray Gymnura altavela

<b>Rostral anomaly in a juvenile Spiny Butterfly Ray <I>Gymnura altavela</I> (Linnaeus, 1758) (Elasmobranchii: Myliobatiformes: Gymnuridae) from the Canary Islands</b>

Morphological Abnormalities of Indian Ring Skate, Orbiraja powelli (Alcock, 1898) (Rajiformes: Rajidae) Collected in the Southwest Coast of India

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