Publications

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Size at maturity and reproductive traits of shortfin mako, Isurus oxyrinchus, in the western and central North Pacific

Size at maturity and reproductive traits of shortfin mako, Isurus oxyrinchus, in the western and central North Pacific

Published: 18 January 2011 Yasuko Semba , Ichiro Aoki and Kotaro Yokawa . ABSTRACT: Shortfin mako, Isurus oxyrinchus, is a highly migratory shark with a worldwide distribution. Despite recent global concern and intensive ecological studies on this species, little is known about its reproduction, owing to a paucity of information on mature females. We...

Partitioning of food resources by four abundant, co-occurring elasmobranch species: relationships between diet and both body size and season

Partitioning of food resources by four abundant, co-occurring elasmobranch species: relationships between diet and both body size and season

Published: 18 January 2011 E. Sommerville , M. E. Platell , W. T. White , A. A. Jones and I. C. Potter ABSTRACT: The present study has tested statistically the hypothesis that the diets of four abundant and co-occurring elasmobranch species differ and change with body size and season and has determined the extent...

Resurrection of the name Carcharhinus cerdale, a species different from Carcharhinus porosus

Resurrection of the name Carcharhinus cerdale, a species different from Carcharhinus porosus

Published on 15. January 2011 José I. Castro ABSTRACT: The smalltail shark, Carcharhinus porosus Ranzani, 1840, is a small shark that inhabits the western North Atlantic Ocean from the Gulf of Mexico to Brazil. Carcharhinus cerdale Gilbert, in Jordan and Evermann, 1898, is a small shark that inhabits the eastern Pacific from the Gulf...

Cephaloscyllium stevensi: a new species of swellshark (Carcharhiniformes: Scyliorhinidae) from Papua New Guinea

Cephaloscyllium stevensi: a new species of swellshark (Carcharhiniformes: Scyliorhinidae) from Papua New Guinea

Published on 15. January 2011 Eugenie Clark and John E. Randall ABSTRACT: Cephaloscyllium stevensi n. sp., is described from five adult specimens (445-660 mm TL) taken in a Nautilus trap set in 240-274 m off eastern Papua New Guinea. It is distinguished from its similar congener, C. speccum Last, Séret & White, from off...

Reproductive biology of the scalloped hammerhead shark Sphyrna lewini (Chondrichthyes: Sphyrnidae) off south-west Mexico

Reproductive biology of the scalloped hammerhead shark Sphyrna lewini (Chondrichthyes: Sphyrnidae) off south-west Mexico

Published on 15 January 2011 Marcela Bejarano-Álvarez, Felipe Galván-Magaña and Rosa Isabel Ochoa-Báez ABSTRACT: The scalloped hammerhead shark Sphyrna lewini is the most important species in the artisanal shark fishery in the Gulf of Tehuantepec, Mexico. Knowledge about the reproductive biology of this species in the area is nonexistent, despite its being listed worldwide...

A review of the genus Platyrhina (Chondrichthys: Platyrhinidae) from the northwestern Pacific, with descriptions of two new species

A review of the genus Platyrhina (Chondrichthys: Platyrhinidae) from the northwestern Pacific, with descriptions of two new species

Published: 12. January 2011 Yukio Iwatsuki,  Kei Miyamoto, Kazuhiro Nakaya, Jie Zhang. ABSTRACT: The genus Platyrhina from the northwestern Pacific was reviewed, including a redescription and neotype proposal for Platyrhina sinensis (Bloch and Schneider 1801), and the description of two new species. Platyrhina limboonkengi Tang 1933 is relegated to the synonymy of P. sinensis,...

Shark predation and tooth wear in a population of northeastern Pacific killer whales

Shark predation and tooth wear in a population of northeastern Pacific killer whales

Online publication date: January 06, 2011 Ford JKB, Ellis GM, Matkin CO, Wetklo MH, Barrett-Lennard LG, Withler RE ABSTRACT: The cosmopolitan killer whale Orcinus orca feeds on a wide variety of prey types over its global range, but in at least some regions, genetically distinct and ecologically specialised lineages of killer whales coexist sympatrically....

Electrosensory pore distribution and feeding in the megamouth shark Megachasma pelagios (Lamniformes: Megachasmidae)

Electrosensory pore distribution and feeding in the megamouth shark Megachasma pelagios (Lamniformes: Megachasmidae)

Note Online publication date: January 06, 2011 Kempster RM, Collin SP ABSTRACT: The megamouth shark Megachasma pelagios is a rare, large filter-feeding shark. Little to nothing is known of its sensory biology, particularly in relation to its feeding behaviour. We describe the abundance and distribution of ampullary pores over the head and propose that...

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