Results 111 to 120 of about 70,813 (251)

‘It's not much, but it's honest work’: The status of environmental DNA analyses of fish biodiversity in southern Africa

Journal of Fish Biology, EarlyView.
Abstract Environmental DNA (eDNA) biodiversity surveys have the power to transform the detection of species in natural environments, which is crucial for the conservation and management of freshwater, estuarine and marine environments. Globally, eDNA‐based analyses have increased significantly, with fishes being the most widely studied aquatic ...
Sophie von der Heyden
wiley   +1 more source

Vertebral Bomb Radiocarbon Suggests Extreme Longevity in White Sharks

PLoS ONE, 2014
Conservation and management efforts for white sharks (Carcharodon carcharias) remain hampered by a lack of basic demographic information including age and growth rates. Sharks are typically aged by counting growth bands sequentially deposited in their vertebrae, but the assumption of annual deposition of these band pairs requires testing.
Hamady, Li Ling, Natanson, Lisa J., Skomal, Gregory B., Thorrold, Simon R.   +3 more
openaire   +6 more sources

Age and growth of the endemic groovebelly stingray (Dasyatis hypostigma), a heavily exploited batoid in the Brazilian Meridional Margin (21–34° S)

Journal of Fish Biology, EarlyView.
Abstract Life‐history data are often lacking for exploited elasmobranchs, jeopardizing proper management and conservation measures for this vulnerable group. Herein, we provided age and growth estimates for the groovebelly stingray (Dasyatis hypostigma), a medium‐sized, heavily exploited batoid endemic to the southwestern Atlantic Ocean.
Giovanni Arlan Torres, Rodrigo Silvestre Martins, Luciano Gomes Fischer, Luís Gustavo Cardoso, Rodrigo Sant'Ana, Bruno Mourato   +5 more
wiley   +1 more source

Review of a Small-scale Pelagic Longline Fishery off Northeastern Brazil [PDF]

, 1998
The annual catches of four small longliners operating off northeast Brazil from 1983 to 1997 were examined across different areas and locations. The total catch comprised tunas (30%), sharks (54%), billfishes (12%), and other fish species (4%).
Bezerra, T. R. Q., Broadhurst , M. K., Hazin, F. H. V., Travassos, P. E. P., Zagaglia, J. R.   +4 more
core  

Hidden partnerships in the dark: Cold‐water coral–fish associations in Fiordland, New Zealand

Journal of Fish Biology, EarlyView.
Abstract The ichthyofauna of the Fiordland ecosystems of southern Aotearoa New Zealand was documented during four remotely operating vehicle (ROV) dives between 100 and 350 m depth. A total of 26 fish species were documented within two fiord basins.
Alexander H. Knorrn, Peter Marriott, Kareen Schnabel, André Freiwald   +3 more
wiley   +1 more source

Return ticket: spatial use patterns of white sharks (Carcharodon carcharias) from a shark-bite mitigation program in eastern Australia

Frontiers in Fish Science
The inherent susceptibility of white sharks (Carcharodon carcharias), coupled with reported declines in abundance, has led to their global listing as “Vulnerable”, prompting substantial conservation efforts.
Gonçalo G. Ramos, Dean C. Blower, Nuno Queiroz, Nuno Queiroz, Paul A. Butcher   +4 more
doaj   +1 more source

European Shark Fisheries: A Preliminary Investigation into Fisheries, Conversion Factors, Trade Products, Markets and Management Measures [PDF]

, 2007
Recommends new regulations to prevent shark finning -- an illegal practice in which a shark's fins are removed and its carcass dumped at sea -- and stresses the urgent need for effective shark conservation ...
Bernard Seret, Caroline Raymakers, Fabrizio Serena, Jim Ellis, John Carlson, Mario Pinho, Maurice Clarke, Nils Roar Hareide, Sandrine Polti, Sarah Fowler, Shelley Clarke, Sonja Fordham   +11 more
core  

Insights into the structure of grey reef shark aggregation, Carcharhinus amblyrhynchos (Bleeker, 1856), in two distinct channels of the Maldivian archipelago, Indian Ocean

Journal of Fish Biology, EarlyView.
Abstract The grey reef shark Carcharhinus amblyrhynchos is one of the most frequently encountered reef‐associated shark species in the Maldives, yet very little is known about its local size structure or population dynamics. This study provides new insights into two aggregations of C.
Andrea Parmegiani, Jacopo Gobbato, Rilwan Yoosuf, Davide Seveso, Paolo Galli, Andrew Darren Whitehead, Yameen Ismail, Simone Montano   +7 more
wiley   +1 more source

Evidence of Decline in Shark Fin Demand: China [PDF]

, 2014
Many of the planet's vulnerable shark species face extreme population pressures due to overfishing often driven by demand for their fins. In recent years, with its growing economy, China has emerged as the largest market for shark fin. Consumer awareness

core  

Pigmentation disorders in three specimens of spiny dogfish, Squalus acanthias Linnaeus, 1758, from the Gulf of Venice, northern Adriatic Sea

Journal of Fish Biology, EarlyView.
Abstract This study reports three cases of pigmentation disorders in Squalus acanthias from the Gulf of Venice. Two specimens exhibited spotless phenotypes, whereas one exhibited hypermelanism. Morphological assessments were conducted for two individuals, alongside genetic analysis of mitochondrial genes to determine phylogeographic relationships. Both
Jacopo Bernardi, Licia Finotto, Giusy Catalano, Valentina Crobe, Alessia Cariani, Alice Ferrari   +5 more
wiley   +1 more source