Home » Archives
Ocean warming impairs the predator avoidance behaviour of elasmobranch embryos
Ocean warming impairs the predator avoidance behaviour of elasmobranch embryos Daniel M Ripley, Sara De Giorgio, Kirstin Gaffney, Lowri Thomas, Holly A Shiels ABSTRACT: Embryogenesis is a vulnerable stage in elasmobranch development due in part to high predation mortality. Embryonic elasmobranchs respond to potential predators by displaying a freezing behaviour, characterized by the cessation of
Temporal and spatial variability of whale shark aggregation in the South Ari Marine Protected Area
Analysis of the temporal and spatial variability of whale shark (Rhincodon typus) aggregation in the South Ari Marine Protected Area, Maldives, Indian Ocean S. Valsecchi, C. Lanfredi, A. Azzellino, A. Savini, V. A. Bracchi, F. Marchese, J. Hancock, R. Rees, C. Cánovas Pérez ABSTRACT: Whale sharks are known to aggregate in coastal areas. In the
Redefining provisioning in marine wildlife tourism
Redefining provisioning in marine wildlife tourism Lauren Meyer, Christine Barry, Gonzalo Araujo, Adam Barnett, Juerg M. Brunnschweiler, Andrew Chin, Austin Gallagher, Teleah Healy, Alison Kock, David Newsome, Alessandro Ponzo, Charlie Huveneers ABSTRACT: Wildlife tourism uses various stimuli to attract species and facilitate close encounters. Such activities are often referred to as provisioning, however the term
Challenges and conservation potential of shark-diving tourism in the Macaronesian archipelagos
Challenges and conservation potential of shark-diving tourism in the Macaronesian archipelagos Pedro G. Gonzáles-Mantilla, Austin J. Gallagher. Carmelo J. León, Gabriel M.S. Vianna ABSTRACT: Macaronesia is formed by some of most isolated oceanic islands of the Atlantic Ocean. This region is typically heavily exploited by fisheries; however, in recent years, marine wildlife tourism has become
Delimiting cryptic species within the brown-banded bamboo shark in the Indo-Australian region
Delimiting cryptic species within the brown-banded bamboo shark, Chiloscyllium punctatum in the Indo-Australian region with mitochondrial DNA and genome-wide SNP approaches Fahmi, Ian R. Tibbetts, Michael B. Bennett, Christine L. Dudgeon ABSTRACT: Background Delimiting cryptic species in elasmobranchs is a major challenge in modern taxonomy due the lack of available phenotypic features. Employing stand-alone genetics
Two new species of freshwater stingrays of the genus Paratrygon from the Orinoco basin
Two new species of freshwater stingrays of the genus Paratrygon (Chondrichthyes: Potamotrygonidae) from the Orinoco basin, with comments on the taxonomy of Paratrygon aiereba Thiago Silva Loboda, Carlos A. Lasso, Ricardo de Souza Rosa, Marcelo Rodrigues de Carvalho ABSTRACT: The genus Paratrygon, currently recognized as the sole monotypic genus of the family Potamotrygonidae, has a
Unified natural mortality estimation for teleosts and elasmobranchs
Unified natural mortality estimation for teleosts and elasmobranchs Dureuil M, Aeberhard WH, Burnett KA, Hueter RE, Tyminski JP, Worm B ABSTRACT: Natural mortality, M, is a key parameter for the assessment and management of living resources but is difficult to observe directly. Therefore, M is often estimated indirectly from life history traits, and it is
Age and growth of the bull shark around Reunion Island
Age and growth of the bull shark (Carcharhinus leucas) around Reunion Island, South West Indian Ocean Florian Hoarau, Audrey Darnaude, Thomas Poirout, Lou-Anne Jannel, Maylis Labonne, Sébastien Jaquemet ABSTRACT: Sharks exhibit varied demographic strategies depending on both the species and the population location, which make them more or less vulnerable to fishing. Accurate evaluation of
The Growth Parameters of the Mako Shark in the Moroccan Central Atlantic Coast
The Growth Parameters of the Mako Shark Isurus Oxyrinchus (Rafinesque, 1810) in the Moroccan Central Atlantic Coast Jihade Alahyene, Brahim Chiahou, Hammou El Habouz, Badreddine Mekyassi, Abdelbasset Ben-bani ABSTRACT: The present study was carried out through regular biological sampling operations of the mako shark during a period of 24 months (October 2017 – August 2019).
Etmopterus brosei sp. nov.: a new lanternshark from the SE Atlantic and SW Indian oceans
Etmopterus brosei sp. nov.: a new lanternshark (Squaliformes: Etmopteridae) from the southeastern Atlantic and southwestern Indian oceans, with a revised key to the Etmopterus lucifer clade Ebert, D.A., Leslie, R.W. & Weigmann, S. ABSTRACT: A new species of lanternshark, Etmopterus brosei sp. nov. (Squaliformes: Etmopteridae), is described from the southeastern Atlantic and southwestern Indian oceans.
Recreational Harvest of Sharks and Rays in Western Australia Is Only a Minor Component of the Total Harvest
Recreational Harvest of Sharks and Rays in Western Australia Is Only a Minor Component of the Total Harvest Braccini, M.; Lai, E.; Ryan, K.; Taylor, S. ABSTRACT: Sharks and rays are a global conservation concern with an increasing number of species considered at risk of extinction, mostly due to overfishing. Although the recreational harvest of
Limited Trans-Oceanic Movements and Regional Residency in North Pacific Blue Sharks
Isotopic Tracers Suggest Limited Trans-Oceanic Movements and Regional Residency in North Pacific Blue Sharks (Prionace glauca) Daniel J. Madigan, Oliver N. Shipley, Aaron B. Carlisle, Heidi Dewar, Owyn E. Snodgrass, Nigel E. Hussey ABSTRACT: Blue sharks (Prionace glauca) are globally distributed, large-bodied pelagic sharks that make extensive migrations throughout their range. In the North Pacific,
Gill surface area provides a clue for the respiratory basis of brain size in the blacktip shark
Gill surface area provides a clue for the respiratory basis of brain size in the blacktip shark (Carcharhinus limbatus) Serena Wong, Jennifer S. Bigman, Kara E. Yopak, Nicholas K. Dulvy ABSTRACT: Brain size varies dramatically, both within and across species, and this variation is often believed to be the result of trade-offs between the cognitive
First record of swimming speed of the Pacific sleeper shark using a baited camera array
First record of swimming speed of the Pacific sleeper shark Somniosus pacificus using a baited camera array Yoshihiro Fujiwara, Yasuyuki Matsumoto, Takumi Sato, Masaru Kawato, Shinji Tsuchida ABSTRACT: The Pacific sleeper shark Somniosus pacificus is one of the largest predators in deep Suruga Bay, Japan. A single individual of the sleeper shark (female, ~300 cm
DNA barcoding of shark species traded in Singapore
Sharks in hot soup: DNA barcoding of shark species traded in Singapore Celine J.N. Liu, Sean Neo, Nathalia M. Rengifo, Ian French, Sarah Chiang, Mathias Ooi, Jie Min Heng, Nathaniel Soon, Jing Ying Yeo, Haaken Z. Bungum, Kurumi Ota, Arina A. Koul, Yan Hong Poh, Benjamin J. Wainwright ABSTRACT: Sharks are apex predators that play