Scientific Papers

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An unusual, dwarf new species of Neotropical freshwater stingray

An unusual, dwarf new species of Neotropical freshwater stingray

Published on 20. April 2011 An unusual, dwarf new species of Neotropical freshwater stingray, Plesiotrygon nana sp. nov., from the upper and mid Amazon basin: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae) Marcelo R. de Carvalho, Maíra P. Ragno ABSTRACT: A new species of the relatively poorly known Neotropical freshwater stingray genus Plesiotrygon Rosa, Castello

Noteworthy elasmobranch records from Oman

Noteworthy elasmobranch records from Oman

Short Communication published in April 2011 AC Henderson and AJ Reeve ABSTRACT: Records of 11 elasmobranch species previously unreported from, or uncommon in, Omani waters are presented. Records new to Oman include Carcharhinus altimus, C. leiodon, Centrophorus  isodon, Ctenacis fehlmanni, Himantura fai, Mobula eregoodootenke and Sphyrna zygaena, whereas noteworthy records of uncommon species include Himantura

Gear selectivity of large-mesh nets and drumlines used to catch sharks in the Queensland Shark Control Program

Gear selectivity of large-mesh nets and drumlines used to catch sharks in the Queensland Shark Control Program

Published in April 2011 WD Sumpton, SM Taylor, NA Gribble, G. McPherson, T. Ham ABSTRACT: Catches of sharks and bycatch in large-mesh nets and baited drumlines used by the Queensland Shark Control Program were examined to determine the efficacy of both gear types and assess fishing strategies that minimise their impacts. There were few significant

Bycatch of high sea longline fisheries and measures taken by Taiwan: Actions and challenges

Bycatch of high sea longline fisheries and measures taken by Taiwan: Actions and challenges

Published online on 17 March 2011. Hsiang-Wen Huang ABSTRACT: Taiwan is a major longline fishing nation with an interest in proactive conservation measures. Facing global concerns about the incidental catch in longline fisheries, Taiwan has focused on bycatch issues since the 2000s. This paper reviews the existing information on bycatch and the actions taken by

Evaluating post-release behaviour modification in large pelagic fish deployed with pop-up satellite archival tags

Evaluating post-release behaviour modification in large pelagic fish deployed with pop-up satellite archival tags

Advance access publication on 15 March 2011. John P. Hoolihan, Jiangang Luo, Francisco J. Abascal, Steven E. Campana, Gregorio De Metrio, Heidi Dewar, Michael L. Domeier, Lucy A. Howey, Molly E. Lutcavage , Michael K. Musyl, John D. Neilson, Eric S. Orbesen, Eric D. Prince, and Jay R. Rooker ABSTRACT: Post-release behaviour modification, possibly a

Reproductive biology and embryonic development of Squalus blainvillei in the eastern Mediterranean Sea

Reproductive biology and embryonic development of Squalus blainvillei in the eastern Mediterranean Sea

Published online on 08 March 2011. Vasiliki Kousteni and Persefoni Megalofonou. ABSTRACT: A total number of 526 Squalus blainvillei was sampled from the bottom trawl and bottom longline catches in the eastern Mediterranean Sea from December 2004 to December 2009. Females outnumbered males and the overall sex ratio was 1.26:1. Females ranged from 182 to

Tropical Eastern Pacific Records of the Prickly Shark, Echinorhinus cookei (Chondrichthyes: Echinorhinidae)

Tropical Eastern Pacific Records of the Prickly Shark, Echinorhinus cookei (Chondrichthyes: Echinorhinidae)

Published on 06. March 2011 Early view paper : Douglas J. Long, John E. McCosker, Shmulik Blum,  Avi Klapfer. ABSTRACT: Most records of the prickly shark, Echinorhinus cookei Pietschmann, 1928 are from temperate and subtropical areas of the Pacific Rim, with few records from the tropics. This seemingly disjunct distribution led some authors to consider

Rediscovery and description of the quagga shark, Halaelurus quagga (Alcock, 1899) (Chondrichthyes: Scyliorhinidae) from the southwest coast of India

Rediscovery and description of the quagga shark, Halaelurus quagga (Alcock, 1899) (Chondrichthyes: Scyliorhinidae) from the southwest coast of India

Published on 02. March 2011 K.V. Akhilesh, K.K. Bineesh, C.P.R. Shanis, B.A. Human, U. Ganga ABSTRACT: The Quagga shark Halaelurus quagga (Alcock, 1899) is one of the poorest known scyliorhinid (Carcharhiniformes) sharks of the world, described from a single specimen collected from the Arabian Sea coast of India (off Malabar). Since its description, the only

Long-term individual identification and site fidelity of white sharks, Carcharodon carcharias, off California using dorsal fins

Long-term individual identification and site fidelity of white sharks, Carcharodon carcharias, off California using dorsal fins

Published on 1 March 2011 Scot D. Anderson, Taylor K. Chapple, Salvador J. Jorgensen, A. Peter Klimley, Barbara A. Block ABSTRACT: Mark-recapture techniques can be used to estimate white shark (Carcharodon carcharias) population abundance. These frameworks are based on assumptions that marks are conserved and animals are present at the sampling location over the entire

A new species of Mustelus (Family: Triakidae) from Indian EEZ.

A new species of Mustelus (Family: Triakidae) from Indian EEZ.

Published in February 2011. Cubelio, S.S., Remya R and Kurup, B.M. ABSTRACT: A species of shark of the genus Mustelus belonging to the family Triakidae new to the science has been described. The new species was collected during the commercial trawling operation conducted along the continental slope of Indian EEZ. It is compared with its

Morphology and phylogenetic relationships of a remarkable new genus and two new species of Neotropical freshwater stingrays from the Amazon basin (Chondrichthyes: Potamotrygonidae)

Morphology and phylogenetic relationships of a remarkable new genus and two new species of Neotropical freshwater stingrays from the Amazon basin (Chondrichthyes: Potamotrygonidae)

Published on 24. February 2011. Marcelo R. de Carvalho, Nathan R. Lovejoy ABSTRACT: The morphology and phylogenetic relationships of a new genus and two new species of Neotropical freshwater stingrays, family Potamotrygonidae, are investigated and described in detail. The new genus, Heliotrygon, n. gen., and its two new species, Heliotrygon gomesi, n. sp. (type-species) and

Migration Pathways, Behavioural Thermoregulation and Overwintering Grounds of Blue Sharks in the Northwest Atlantic

Migration Pathways, Behavioural Thermoregulation and Overwintering Grounds of Blue Sharks in  the Northwest Atlantic

Published on 23. February 2011. Campana SE, Dorey A, Fowler M, Joyce W, Wang Z, et al. ABSTRACT: The blue shark Prionace glauca is the most abundant large pelagic shark in the Atlantic Ocean. Although recaptures of tagged sharks have shown that the species is highly migratory, migration pathways towards the overwintering grounds remain poorly

From monsoons to mantas: seasonal distribution of Manta alfredi in the Maldives

From monsoons to mantas: seasonal distribution of Manta  alfredi in the Maldives

Published on 10. February 2011. ANDERSON, R. C., ADAM, M. S. and GOES, J. I. ABSTRACT: The Republic of Maldives in the central Indian Ocean is home to large numbers of manta rays, Manta alfredi. They are known to undertake seasonal migrations within the Maldives, but these movements have not been well documented. The aims

Squatina caillieti new species of angel shark Philippine Islands

Squatina caillieti new species of angel shark Philippine Islands

Published on 07. February 2011. Jonathan H. Walsh, David A. Ebert, Leonard J.V. Compagno. ABSTRACT: A new species of angel shark, Squatina caillieti sp. nov., is described from a single specimen collected in deepwater off Luzon in the Philippines. The new species is closest to S. formosa and S. nebulosa, but differs from its congeners

Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks from a Tourist Shark Feeding Site in Fiji

Seasonal and Long-Term Changes in Relative Abundance of Bull Sharks from a Tourist  Shark Feeding Site in Fiji

Published on 27. January 2011. Juerg M. Brunnschweiler, Harald Baensch. ABSTRACT: Shark tourism has become increasingly popular, but remains controversial because of major concerns originating from the need of tour operators to use bait or chum to reliably attract sharks. We used direct underwater sampling to document changes in bull shark Carcharhinus leucas relative abundance

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