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Two new species of the softnose skate genus Brochiraja are described based on material collected from the Norfolk Ridgein the northern Tasman Sea (South-West Pacific). Most of this material was collected in 2003 by the New Zealand... more
Two new species of the softnose skate genus Brochiraja are described based on material collected from the Norfolk Ridgein the northern Tasman Sea (South-West Pacific). Most of this material was collected in 2003 by the New Zealand vessel,RV Tangaroa, during the NORFANZ voyage. These species extend the known range of the genus northward along theNorfolk Ridge, and along with B. aenigma, are the only other representatives of the genus found outside seas adjacentNew Zealand. Brochiraja heuresa sp. nov. is known from the western Norfolk Ridge and the Wanganella Bank at 870–1350 m depth, whereas B. vittacauda sp. nov. is known from a smaller area of the western Norfolk Ridge at 629–973 mdepth. These species differ from each other, and from other nominal members of the genus, in morphometrics, meristics, coloration and squamation.
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For a few decades, the decline of sawfish populations has been observed in all parts of their distribution range. Sawfishes are particularly sensitive to exploitation and habitat destruction because of their large size and their coastal... more
For a few decades, the decline of sawfish populations has been observed in all parts of their distribution range. Sawfishes are particularly sensitive to exploitation and habitat destruction because of their large size and their coastal and riverine habitats. InWest Africa, sawfishes were relatively common in the past, but nowadays, they are rarely caught or observed. A group of West African countries, under the leadership of the Commission sous-régionale des Pêches, was willing to submit an application for the listing of the sawfishes in CITES appendix 1. This caused the necessity to assess the present status of the species and populations of sawfishes occurring in West Africa, and to collect data on the cultural importance of the sawfishes for some ethnic groups. In this scope, a field study was carried out from March to June 2005, in Mauritania, Senegal, Gambia Guinea Bissau, and Guinea Conakry. This study confirms the strong contraction of the distribution range of sawfishes in ...
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Premier signalement de Cirrimaxilla formosa (Muraenidae) de Nouvelle-Caledonie, trouve dans des estomacs de serpents marins. Plusieurs specimens de Cirrimaxilla formosa (Muraenidae) ont ete trouves dans les estomacs de serpents de mer,... more
Premier signalement de Cirrimaxilla formosa (Muraenidae) de Nouvelle-Caledonie, trouve dans des estomacs de serpents marins. Plusieurs specimens de Cirrimaxilla formosa (Muraenidae) ont ete trouves dans les estomacs de serpents de mer, Laticauda laticaudata et L. saintgironsi, captures en Nouvelle-Caledonie dans le cadre d'une etude ecologique sur ces serpents. Ces specimens representent le premier signalement de C. formosa en Nouvelle-Caledonie. Cette murene n'etait jusqu'a present connue que par son holotype recolte dans le sud de Taiwan.
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Neoraja iberica n. sp. is described from the Portuguese and Spanish sector of the Iberian Peninsula south coast slope, based on a series of 50 type specimens representing all sizes of both sexes. This pygmy skate species was found with a... more
Neoraja iberica n. sp. is described from the Portuguese and Spanish sector of the Iberian Peninsula south coast slope, based on a series of 50 type specimens representing all sizes of both sexes. This pygmy skate species was found with a maximum total length of 316 mm for females and 327 mm for males. The smallest specimens were a 55 mm neonate female and a 67 mm TL male. This new species is easily distinguished externally from four named congeners N. stehmanni, N. caerulea, N. africana and N. carolinensis by: upper side ochre to medium greyish-brown and dark greyish in ground colour with a lively ornamentation in smaller specimens of dark brown dots and spots all over disc and posterior pelvic lobes to the extreme margins, plus frequently a few pairs of whitish spots and dots on inner pectorals; 7-8 blackish cross-bars or asymmetrically paired saddle blotches along tail, which pattern fades with growth and becomes reduced in adults to a few pairs of larger dark, pale edged spots, p...
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The Mediterranean Large Elasmobranchs Monitoring (MEDLEM) database contains over 3000 records (more than 4000 individuals) of large elasmobranch species from 20 different countries around the Mediterranean and Black seas, observed from... more
The Mediterranean Large Elasmobranchs Monitoring (MEDLEM) database contains over 3000 records (more than 4000 individuals) of large elasmobranch species from 20 different countries around the Mediterranean and Black seas, observed from 1666 to 2017. The main species included in the archive are the devil fish (1 813 individuals), the basking shark (939 individuals), the blue shark (585 individuals) and the great white shark (337 individuals).In the last decades other species such as the shortfin mako (166 individuals), the spiny butterfly ray (138) and the thresher shark (174 individuals) were reported with an increasing frequency. This was possibly due to an increased public awareness on the conservation status of sharks, and a consequent development of new monitoring programmes. MEDLEM does not have a homogeneous reporting coverage throughout the Mediterranean and Black seas and it should be considered as a database of observed species presence. Scientific monitoring efforts in the...
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Three new species of legskates (Anacanthobatidae) are described from the Indo–Australian region. Two of these species conform to the subgenus Sinobatis Hulley of Anacanthobatis von Bonde & Swart, which is herein elevated to genus level... more
Three new species of legskates (Anacanthobatidae) are described from the Indo–Australian region. Two of these species conform to the subgenus Sinobatis Hulley of Anacanthobatis von Bonde & Swart, which is herein elevated to genus level based primarily on clasper morphology. Sinobatis presently includes S. borneensis (South China Sea and Taiwan) and possibly S. melanosoma (East and South China Seas and Taiwan), as well as the new species, S. bulbicauda sp. nov. (eastern Indonesia and northwestern Australia, SE Indian Ocean) and S. filicauda sp. nov. (northeastern Australia, SE Pacific Ocean). The third new species, S. caerulea sp. nov. (northwestern Australia, SE Indian Ocean), is provisionally placed in Sinobatis in the absence of an adult male. The new species are distinguishable from each other, and from nominal Indo–Pacific legskates, based on their morphometrics, meristics, tail morphology and coloration. Legskates exhibit marked intraspecific variation in shape associated with ...
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Résumé/Abstract Le revêtement cutané des Chondrichtyens est constitué d'un grand nombre de structures dermo-épidermiques appelées denticules cutanés ou écailles placoïdes. Chez les Elasmobranches (requins et raies), ces... more
Résumé/Abstract Le revêtement cutané des Chondrichtyens est constitué d'un grand nombre de structures dermo-épidermiques appelées denticules cutanés ou écailles placoïdes. Chez les Elasmobranches (requins et raies), ces denticules présentent des ...
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Tuna fisheries have been identified as one of the major threats to populations of other marine vertebrates, including sea turtles, sharks, seabirds and marine mammals. The development of technical mitigation measures (MM) in fisheries is... more
Tuna fisheries have been identified as one of the major threats to populations of other marine vertebrates, including sea turtles, sharks, seabirds and marine mammals. The development of technical mitigation measures (MM) in fisheries is part of the code of conduct for responsible fisheries. An in-depth analysis of the available literature regarding bycatch mitigation in tuna fisheries with special reference to elasmobranchs was undertaken. Studies highlighting promising MMs were reviewed for four tuna fisheries (longline, purse seine, driftnets and gillnet, and rod and line – including recreational fisheries). The advantages and disadvantages of different MMs are discussed and assessed based on current scientific knowledge. Current management measures for sharks and rays in tuna Regional Fishery Management Organizations (t-RFMOs) are presented. A review of relevant studies examining at-vessel and postrelease mortality of elasmobranch bycatch is provided. This review aims to help fi...
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Four species of stingrays of the genus Dasyatis occur in the Gulf of Gabès, but the taxonomic status of one of them, D. tortonesei has been questioned by several authors, and synonymized with D. pastinaca by some. The present study, using... more
Four species of stingrays of the genus Dasyatis occur in the Gulf of Gabès, but the taxonomic status of one of them, D. tortonesei has been questioned by several authors, and synonymized with D. pastinaca by some. The present study, using morphological comparisons and genetic analyses, demonstrates that there is a closely related species to D. pastinaca in the Gulf of Gabès, but distinguishable by several characters. This species is provisionally identified as Dasyatis cf. tortonesei, pending a more extensive comparative study including specimens from other regions of the Mediterranean Sea and eastern North Atlantic Ocean.
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Based on new photographs of the wound, Tirard et al. (2015) tried to demonstrate that the shark involved in a fatal attack on a human in Lifou in 2007 had homodont teeth and that it sawed the femur instead of directly cutting it,... more
Based on new photographs of the wound, Tirard et al. (2015) tried to demonstrate that the shark involved in a fatal attack on a human in Lifou in 2007 had homodont teeth and that it sawed the femur instead of directly cutting it, promoting the hypothesis that it was a tiger shark instead of a white shark. They also contested the data provided by the direct witness of the attack about the behaviour of the shark, specific to this former species. The evidences they provide are not convincing and, based on the absence of tissue loss and description of a jumping behaviour, we still believe that it was a single bite-and-spit attack by a white shark.
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Research Interests: Geology, Pleistocene, Chondrichthyes, Teeth, Miocene, and 5 moreDescription, Paleontologie, Dent, Tooth, and Dragage
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Research Interests: Taxonomie and Inventaire
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The present paper is an anotated list of the deep-sea fishes trawled during the oceanographic cruise MD-55 by the R.V. «Marion Dufresne» off Brazil during 1987, 85 species are reported representing 39 families with several rare species of... more
The present paper is an anotated list of the deep-sea fishes trawled during the oceanographic cruise MD-55 by the R.V. «Marion Dufresne» off Brazil during 1987, 85 species are reported representing 39 families with several rare species of Congridae, Synaphobranchidae, Alepocephalidae, Chlorophthalmidae, Macrouridae and Ophididiidae. There are also 26 first records for the south western Atlantic and or the Brazilian waters. Specimens are deposited in the collections of the Universidade Santa Ursula, Rio de Janeiro and in the Museum National d'Histoire Naturelle, Paris
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Variation in body size, shape and clasper structure of specimens of Raja mira-letus from the Mediterranean and the Gulf of Guinea led to a study of the morphological variation of this species over its entire known range: the... more
Variation in body size, shape and clasper structure of specimens of Raja mira-letus from the Mediterranean and the Gulf of Guinea led to a study of the morphological variation of this species over its entire known range: the Medi-terranean, and western and southern Africa. A total ...
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Jaws of large individuals, over 2 m in total length, of the shark species Carcharodon carcharias (great white shark) and Isurus oxyrinchus (mako shark) of the family Lamnidae, and Galeocerdo cuvieri (tiger shark) and Carcharhinus leucas... more
Jaws of large individuals, over 2 m in total length, of the shark species Carcharodon carcharias (great white shark) and Isurus oxyrinchus (mako shark) of the family Lamnidae, and Galeocerdo cuvieri (tiger shark) and Carcharhinus leucas (bull shark) of the family Carcharhinidae were found to have multiple, up to five, layers of prismatic calcium phosphate surrounding the cartilages. Smaller individuals of these species and other known species of living chondrichthyans have only one layer of prismatic calcium phosphate surrounding the cartilages, as also do most species of fossil chondrichthyans. Two exceptions are the fossil shark genera Xenacanthus and Tamiobatis. Where it is found in living forms, this multiple layered calcification does not appear to be phylogenetic, as it appears to be lacking in other lamnid and carcharhinid genera and species. Rather it appears to be functional, only appearing in larger individuals and species of these two groups, and hence may be necessary to strengthen the jaw cartilages of such individuals for biting.
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... The authors are most grateful to Sonja Fordham for extraordinary assistance in compiling and editing information in this report, particularly with respect to management, and Shelley Clarke who contributed much of section 3 and other... more
... The authors are most grateful to Sonja Fordham for extraordinary assistance in compiling and editing information in this report, particularly with respect to management, and Shelley Clarke who contributed much of section 3 and other valuable information. ... K LA US J OS T ...
Page 1. Mesozoic Fishes Systematics and Paleoecology, G. Arratia & G. Viohl (eds.): pp. 47-62, 7 figs., 4 apps. © 1996 by Verlag Dr. Friedrich Pfeil, München, Germany ISBN 3-92387190-2 The new genus Iansan (Chondrichthyes,... more
Page 1. Mesozoic Fishes Systematics and Paleoecology, G. Arratia & G. Viohl (eds.): pp. 47-62, 7 figs., 4 apps. © 1996 by Verlag Dr. Friedrich Pfeil, München, Germany ISBN 3-92387190-2 The new genus Iansan (Chondrichthyes, Rhinobatoidea) ...
Farrodes nymphs are specialized periphyton/biofilm scrapers. Their maxillae are the most specialized mouthparts, but other elements, with their systems of variously modified setae, are designed to obtain and transport food particles to... more
Farrodes nymphs are specialized periphyton/biofilm scrapers. Their maxillae are the most specialized mouthparts, but other elements, with their systems of variously modified setae, are designed to obtain and transport food particles to the pharynx with a minimum of loss. The morphology and adaptations of these mouthparts and related head areas, as well as associated musculature, are described.
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Dans la mythologie grecque, la chimère était un animal mythique à tête de lion, corps ou autre tête de chèvre, queue de serpent et capable de cracher du feu ! En génétique, une chimère est un organisme créé à partir des cellules de... more
Dans la mythologie grecque, la chimère était un animal mythique à tête de lion, corps ou autre tête de chèvre, queue de serpent et capable de cracher du feu ! En génétique, une chimère est un organisme créé à partir des cellules de plusieurs animaux différents et donc qui présente des attributs d'espèces différentes regroupés en un seul animal. Enfin dans notre cas, la chimère est un poisson cartilagineux, parent des requins et des raies, et vivant dans les abysses. Il doit son nom à sa forme curieuse qui fait penser à un amalgame de plusieurs animaux. En effet, ce poisson est vraiment bizarre : il possède une tête massive et globuleuse avec un museau protubérant faisant penser à un rat ; des canaux sensoriels très visibles dessinant des motifs curieux sur sa tête ; des fentes branchiales r e c o u v e r t e s p a r u n o p e r c u l e membraneux, ce qui fait que l'on a une ouverture branchiale réduite à un simple orifice qui ne ressemble pas à ce que l'on trouve chez u...
Comment on “4.4 First record of the goblin shark Mitsukurina owstoni Jordan, 1898 (Lamniformes: Mitsukurinidae) in the Mediterranean Sea” by Athanasios Anastasiadis, Evangelos Papadimitriou and Frithjof C. Küpper in: Kousteni, V., Anastasiadis, A., Bariche, M., Battaglia, P., Bonifazi, A. et al. ...more
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Six new species of squaloid sharks of the genus Etmopterus are described from the Arafura and Banda Seas (south-east Indian Ocean), and the Coral Sea (south-west Pacific): E. fusus sp. nov. from the slope of northwestern Australia; E.... more
Six new species of squaloid sharks of the genus Etmopterus are described from the Arafura and Banda Seas (south-east Indian Ocean), and the Coral Sea (south-west Pacific): E. fusus sp. nov. from the slope of northwestern Australia; E. evansi sp. nov. from northwestern Australia and eastern Indonesia; E. dianthus sp. nov. from the Coral Sea; E. dislineatus sp. nov. off tropical eastern Australia; and E. caudistigmus sp. nov. and E. pseudosqualiolus sp. nov. from the slopes of the Chesterfield Islands, New Caledonia, and the northern part of the Norfolk Ridge. They can be distinguished by their coloration, body shape, teeth morphology, vertebral counts, dermal denticles, the position of their fins, and the size and shape of luminescent markings on the flank, caudal peduncle and caudal fin. A key for the Etmopterus species of tropical Australasia is provided.
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system or transmitted in any form or by any means without the prior permission from the Turkish Marine Research Foundation (TÜDAV). The finding, interpretations, and conclusions expressed in this publication are entirely those of authors... more
system or transmitted in any form or by any means without the prior permission from the Turkish Marine Research Foundation (TÜDAV). The finding, interpretations, and conclusions expressed in this publication are entirely those of authors and should not be attributed in any manner to the Turkish Marine
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A new arhynchobatid skate of the genus Notoraja is described from five specimens collected on the slopes of the Norfolk Ridge between 1195 and 1313 m depth. The new species is distinct from its sibling species from southern Australian... more
A new arhynchobatid skate of the genus Notoraja is described from five specimens collected on the slopes of the Norfolk Ridge between 1195 and 1313 m depth. The new species is distinct from its sibling species from southern Australian waters, the Blue Skate (N. azurea), by its smaller size, several morphometric and meristic characters, thorn pattern and dorsal and ventral coloration.
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A new righteye flounder, Samariscus neocaledonia sp. nov., is described on the basis of two specimens collected in deep waters (244–278 m) around New Caledonia. The new species is easily distinguished from its 18 congeners in having a... more
A new righteye flounder, Samariscus neocaledonia sp. nov., is described on the basis of two specimens collected in deep waters (244–278 m) around New Caledonia. The new species is easily distinguished from its 18 congeners in having a combination of 78–81 dorsal fin rays, 62–65 anal fin rays, five pectoral fin rays, ca. 55–62 lateral line scales, and 10 abdominal and 31–32 caudal vertebrae.
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Guide de bonnes pratiques pour réduire la mortalité des requins et des raies capturés accidentellement par les thoniers senneurs tropicaux, Good pratices to reduce the mortality of sharks and rays caught incidentally by tropical tuna purse seiners, Guía de buenas prácticas para reducir la mortali...more