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| Registros recuperados: 16 | |
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| Kobelkowsky,Abraham. |
| Mediante la comparación del neurocráneo de la "raya mariposa" Gymnura micrura con especies representantes de cinco familias de Batoidea, se reconoce que corresponde al patrón anatómico del orden Myliobatiformes, por la ausencia del rostro, la presencia de una sola fontanela y el mayor desarrollo de los procesos postorbitarios. La especie en estudio difiere de los Urotrygonidae y Dasyatidae por tener los procesos postorbitarios subdivididos. La organización del encéfalo de G. micrura corresponde al patrón anatómico de los Batoidea, sin embargo, a diferencia de los Rhinobatidae, Urotrygonidae y Dasyatidae, el cerebelo es simétrico; en contraste con los Myliobatidae los hemisferios cerebrales son reducidos; y la principal diferencia con relación a los... |
| Tipo: Journal article |
Palavras-chave: Elasmobranchii; Cráneo; Cerebro; Nervios craneales; Órganos sensoriales. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200042 |
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| Capape, Ch.; Bradai, M. N.; Seck, A. A.; Diata, Y.; Tomasini, J. A.; Quignard, J. P.. |
| Des aspects de la biologie de la reproduction du sagre noir, Etmopterus spinax, sont présentés dans cette note. Les spécimens observés sont récoltés au large des côtes tunisiennes et de la côte du Languedoc (France méridionale), sur des fonds sableux et/ou sablo-vaseux allant de 100 à 400 m de profondeur. Les mâles sont adultes au-delà de 380 mm de longueur totale (LT). La phase de maturation des femelles entrent dans une phase de maturation. La plus petite femelle avec des oocytes majeurs prêts à être pondus mesurait 380 mm LT le la plus petite femelle gravide, 400 mm LT. Toutes les femelles adultes ont plus de 400 mm LT. La taille maximale est de 400 mm LT pour chaque sexe. La gestation pourrait durer une année au minimum, mais il serait hypothétique... |
| Tipo: Journal Contribution |
Palavras-chave: Elasmobranchii; Squalidae Reproduction Reproductive cycle Sexual maturity Shark fisheries Reproduction Sexual maturity http://aims.fao.org/aos/agrovoc/c_6507 http://aims.fao.org/aos/agrovoc/c_7016. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/4084 |
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| González Isáis,Mónica; Montes Domínguez,Héctor Marcos. |
| This work aims to describe the morphology of dorsal and ventral cephalic musculature in five species of genus Urotrygon. Muscular differences were observed, mainly in the development level. Muscles showing certain degree of variation in the dorsal region were the cucullaris and the ethmoideo-parethmoidalis. In ventral view, higher variation was observed. Muscles showing differences were the depressor rostri, the depressor hyomandibularis, the preorbitalis medial, the coracohioideus, and the depressor mandibularis. Urotrygon aspidurus was the species with the largest differences, as it has no mandibular depressor, and the rostral depressor is quite developed. The shape and arrangement of cephalic musculature in Urotrygon is similar to that reported for... |
| Tipo: Journal article |
Palavras-chave: Elasmobranchii; Batoidei; Urotrygon; Cephalic musculature. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100001 |
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| Herman, J.; Hovestadt-Euler, M.; Hovestadt, D.C.; Stehmann, M.. |
| The tooth and rostral spine morphology of representatives of the pristid genera <i>Anoxypristis</i> and <i>Pristis</i>, of the rhinid genera <i>Rhina</i> and <i>Rhynchobatus</i> and of the rhinobatid genera: <i>Apytchotrema, Platyrhina, Platyrhinoidis, Rhinobatos, Trygonorrhina, Zanobatus</i> and <i>Zapteryx</i> is described and illustrated by SEM photographs. A differential diagnosis is given to distinguish the genera by tooth morphology. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Systematics; Batomorphii; Elasmobranchii. |
| Ano: 1997 |
URL: http://www.vliz.be/imisdocs/publications/250634.pdf |
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| Bornatowski,Hugo; Costa,Luciano; Robert,Maurício de Castro; Pina,Juliana Ventura da. |
| O presente estudo foi conduzido em duas comunidades da pesca artesanal nas cidades Guaratuba (Paraná) e Itapoá (Santa Catarina), no sul da costa brasileira. Os conteúdos estomacais de indivíduos Sphyrna zygaena foram identificados, sendo os itens alimentares agrupados em três categorias. As categorias mais importantes foram teleósteos (78,6%) e cefalópodes (60,7%), representados pela sardinha Harengula clupeola e a lula Loligo sp., ambos considerados como principais itens alimentares de S. zygaena na região estudada. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elasmobranchii; Alimentação; Pesca artesanal; Costa paranaense. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100025 |
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| Martin, Corinne; Vaz, Sandrine; Ellis, J. R.; Lauria, Valentina; Coppin, Franck; Carpentier, Andre. |
| Generalised Linear Models, combined with a Geographic Information System, were used to map the habitats of ten demersal elasmobranch taxa (five skates, four sharks and a stingray) in the eastern English Channel, based on an annual fishery-independent bottom trawl survey conducted each October, and covering 21 years. Habitat models showing mean density levels were developed for the most frequently occurring species, whilst binomial occurrence habitat models were built for less frequent species. The main predictors of elasmobranch habitats in the eastern English Channel were depth, bed shear stress and salinity, followed by seabed sediment type and temperature. Habitat maps highlighted contrasting habitat utilisation across species. Raja clavata, and to a... |
| Tipo: Text |
Palavras-chave: Channel Ground Fish Survey; Chondrichthyes; Elasmobranchii; GLM; Grande Ouverture Verticale; Trawl survey. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00086/19730/17478.pdf |
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| Estalles,María L.; Perier,María R.; Giácomo,Edgardo E. Di. |
| ABSTRACT This study estimates and analyses the reproductive parameters and cycle of Sympterygia bonapartii in San Matías Gulf, northern Patagonia, Argentina. A total of 827 males and 1,299 females were analysed. Males ranged from 185 to 687 mm of total length (TL) and females from 180 to 742 mm TL. Sexual dimorphism was detected; females were larger, heavier, exhibited heavier livers, wider discs and matured at lager sizes than males. Immature females ranged from 180 to 625 mm TL, maturing females from 408 to 720 mm TL, mature ones from 514 to 742 mm TL and females with egg capsules from 580 to 730 mm TL. Immature males ranged from 185 to 545 mm TL, maturing ones from 410 to 620 mm TL and mature males from 505 to 687 mm TL. Size at which 50% of the skates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elasmobranchii; Reproduction; Skate; South Western Atlantic Ocean. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100220 |
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| ACEVEDO,K; BOHÓRQUEZHERRERA,J; MORENO,F; MORENO,C; MOLINA,E; GRIJALBA-BENDECK,M; GÓMEZ CANCHONG,P. |
| Con el fin de obtener una aproximación a la estructura del ensamblaje de peces cartilaginosos extraídos por la flota de arrastre camaronero en la costa norte de Colombia, se evaluó la composición y abundancia de tiburones y rayas descartados en dos sectores del Caribe colombiano, entre agosto y noviembre de 2004. Mensualmente se analizaron lances de la flota de arrastre camaronero al interior de cada sector (norte: La Virgen y Portete; sur: Barú, cabo Tiburón, Cascajal, Cispatá, Morrosquillo, Ceycén, Mestizo, río Cedro, Tigua y Tortuguilla). Observadores a bordo de la flota comercial de arrastre camaronero muestrearon 1/5 de la captura previamente homogenizada, tomada al azar de una de las cuatro redes de la embarcación. En 30 lances se registró la... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Elasmobranchii; Tiburones; Arrastre camaronero; Rayas; Colombia. |
| Ano: 2007 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2007000200006 |
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| Registros recuperados: 16 | |
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