Chondrichthyans of High Latitude Seas

Ebert, David A.; Winton, Megan V.

doi:10.1201/9781420080483-c3

Cited by 28 publications

(31 citation statements)

References 58 publications

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“…Skates are the most diverse order of cartilaginous fishes and are composed of 287 (Ebert and Winton, 2010) of the 1221 species (Naylor et al, 2012). The sub-order Rajoidei is divided into three families-the Rajidae, the Arhynchobatidae and Anacanthobatidae (Ebert and Compagno, 2007).…”

Section: Introductionmentioning

confidence: 99%

The secret of the mermaid’s purse: Phylogenetic affinities within the Rajidae and the evolution of a novel reproductive strategy in skates

Chiquillo

Ebert

Slager

et al. 2014

Molecular Phylogenetics and Evolution

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The systematics of the skates in the family Rajidae have been contentious for over 250 years, with most studies inferring relationships among geographically clustered species, and non-overlapping taxa and data sets. Rajid skates are oviparous, and lay egg capsules with a single embryo. However, two species exhibit a derived form of egg laying, with multiple embryos per egg capsule. We provide a molecular assessment of the phylogenetic relationships of skates within the family Rajidae based on three mitochondrial genes. The resulting topology supports monophyly the family. However the genus Raja is polyphyletic, and several species assemblages need to be revised. We proposed a new assemblage as the Rostrorajini, which organizes rajid species into three well-supported tribal lineages for the first time. Further, these data provide an independent assessment of monophyly for the two species exhibiting multiple embryos per egg capsule, supporting their status as the unique genus Beringraja. In addition, we find that among the different size classes of egg capsules, ranging from 1–8 embryos per capsule in this genus, there is variation in frequency and survivorship. In Beringraja binoculata, the strategy of having two embryos per egg capsule occurs in the highest frequency and has the highest survivorship.

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Section: Introductionmentioning

confidence: 99%

The secret of the mermaid’s purse: Phylogenetic affinities within the Rajidae and the evolution of a novel reproductive strategy in skates

Chiquillo

Ebert

Slager

et al. 2014

Molecular Phylogenetics and Evolution

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“…The genus Bathyraja is the most species-rich genus of skates in the family Arhynchobatidae, and is widely distributed throughout the North Pacific and Southern Oceans, ranging from Alaska to northern Mexico in the eastern North Pacific (Ebert and Winton 2010). They can be found in deep waters on the outer continental shelf and upper slope down to depths of 3000 m over both soft and rocky bottoms (Ebert 2003;Kuhnz et al 2006;Ebert and Compagno 2007).…”

Section: Introductionmentioning

confidence: 96%

Color aberrations in Chondrichthyan fishes: first records in the genus Bathyraja (Chondrichthyes: Rajiformes: Arhynchobatidae)

2015

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Two softnose skate specimens with abnormal coloration, one complete albino and one partial albino (leucistic), were captured during fishery-independent trawl surveys. The complete albino specimen was collected in 2007 in Prince William Sound, Alaska, and the leucistic specimen was collected in 2011 off northern California. Based upon meristic and morphometric measurements, the albino skate specimen was identified as the Aleutian Skate, Bathyraja aleutica, and the leucistic skate specimen was identified as the Roughtail Skate, Bathyraja trachura. These are the first documented cases of any type of albinism in the genus Bathyraja. A comprehensive review encompassing reported cases of any type of albinism in Chondrichthyans from peer-reviewed literature todate is provided.

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“…The highest diversity of Chondrichthyes can be found in the East Indian Ocean [2][3][4], where the catches of elasmobranch fishes have increased significantly over the last decades from 18 600 t in 1950 to 77 700 t in 1997 [5]. Today Indonesia has the world's largest chondrichthyan fishery [3].…”

Section: Introductionmentioning

confidence: 99%

Contribution to the Taxonomy and Distribution of Six Shark Species (Chondrichthyes, Elasmobranchii) from the Gulf of Thailand

Weigmann

2012

ISRN Zoology

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A collection of nine shark specimens from six different species, obtained in 1993 from the Gulf of Thailand, was examined in this study. The sharks were determined, morphometrically and meristically analyzed, photographically documented, and compared with relevant literature. Additionally, further available material from the fish collections of the Zoological Museum Hamburg, the Senckenberg Naturmuseum Frankfurt, and the Muséum national d'Histoire naturelle, Paris, was examined by way of comparison. Contrary to most references, prominent dorsal ridges were detected in several specimens of Chiloscyllium griseum. Additionally, one of the specimens had a very unusual big ocellar blotch on the head which had not been reported for this genus before. For Paragaleus randalli, it could be proven that the teeth morphologically deviate strongly from those shown in literature due to having much larger cusps. Furthermore, the known distribution area of Paragaleus randalli could be extended considerably eastwards by about 2000 km. For a seventh species, Paragaleus tengi, differences between the actual morphology of upper lateral teeth and those drawn in the original description were detected.

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Chondrichthyans of High Latitude Seas

Cited by 28 publications

References 58 publications

The secret of the mermaid’s purse: Phylogenetic affinities within the Rajidae and the evolution of a novel reproductive strategy in skates

The secret of the mermaid’s purse: Phylogenetic affinities within the Rajidae and the evolution of a novel reproductive strategy in skates

Color aberrations in Chondrichthyan fishes: first records in the genus Bathyraja (Chondrichthyes: Rajiformes: Arhynchobatidae)

Contribution to the Taxonomy and Distribution of Six Shark Species (Chondrichthyes, Elasmobranchii) from the Gulf of Thailand

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