Prevalence, persistence and impacts of residual fishing hooks on tiger sharks Michel Bègue, Eric Clua, Gilles Siu, Carl Meyer ABSTRACT: We used long-term observations of 55 individually identified tiger sharks (Galeocerdo cuvier) at a shark ecotourism site off Tahiti to estimate the prevalence, retention times and impacts of residual hooks and trailing line resulting from
Description and characterization of the artisanal elasmobranch fishery on Guatemala’s Caribbean coast Ana Hacohen-Domené, Francisco Polanco-Vásquez, Colombo Estupiñan-Montaño, Rachel T. Graham ABSTRACT: Small-scale shark and ray fisheries are conducted throughout Central America’s Caribbean coast. Yet, there is limited information regarding catch composition and diversity of these fisheries, especially in Guatemala. Surveys of catch landings were
Multiple morphological abnormalities in a blue shark Prionace glauca (Linnaeus, 1758) embryo from the Peruvian coast, southeast Pacific Keny Kanagusuku, Miguel Romero, Sergio Ramírez-Amaro ABSTRACT: This study reports for the first time a case of multiple morphological abnormalities in a blue shark Prionace glauca embryo collected on the Peruvian coast, southeast Pacific. External exploration and
New records and range extension of the Portuguese dogfish Centroscymnus coelolepis in the Southwestern Atlantic Ocean, with comments on its morphology Federico Mas, Rodrigo Forselledo, Andrés Domingo, Oscar Pin, Pablo Troncoso, Eugenia Errico, Alejandro Marquez, Sho Tanaka, Simon Weigmann ABSTRACT: The Portuguese dogfish Centroscymnus coelolepis is a wide‐ranging deep‐water shark and a common by‐catch component
Blacktip reefshark (Carcharhinus melanopterus) individual’s identification in Morotai waters using its fin’s natural markings Darmawan Ahmad Mukharror, Dewi Susiloningtyas, Tuty Handayani, Niomi Pridina ABSTRACT: As part of conservation means, ecotourism on shark watching activities has been popular for the last 10 – 25 years. Achieving rank fourth in the shark tourism world, shark watching tourism
Distribution and Movements of Atlantic Shark Species:A 52-Year Retrospective Atlas of Mark and Recapture Data by Nancy E. Kohler and Patricia A. Turner Marine Fisheries Review, Volume 81, Number 2Published in December 2019 PDF-DOWNLOAD
Tonic immobility induction and duration on halmahera walking shark (Hemischyllium halmahera) D A Mukharror, D Susiloningtyas, M Ichsan ABSTRACT: Tonic immobility is an induce method to achieve a temporary condition of cataleptic-like, which is a sudden loss of muscle tone, as a result of various procedures such as situate the object in an “unnatural” position
Assessing stock status of grey sharpnose shark (Rhizoprionodon oligolinx Springer, 1964) in Java Sea Wijopriono and T Ernawati ABSTRACT: Increasing demand for shark products leads to over fishing of these species in many areas, damaging their population. Grey sharpnose shark (Rhizoprionodon oligolinx) is caught mostly by gillnet fleet in Java Sea. The objective of the
BRUVS reveal locally extinct shark and the way for shark monitoring in Brazilian oceanic islands Caio R. Pimentel, Ryan Andrades, Carlos E. L. Ferreira, Otto B. F. Gadig, Euan S. Harvey, Jean‐Christophe Joyeux, Tommaso Giarrizzo ABSTRACT: Here we present records of sharks obtained using baited remote underwater stereo‐video systems (stereo‐BRUVS) at two Brazilian oceanic islands.
Acid-base adjustments and first evidence of denticle corrosion caused by ocean acidification conditions in a demersal shark species Jacqueline Dziergwa, Sarika Singh, Christopher R. Bridges, Sven E. Kerwath, Joachim Enax, Lutz Auerswald ABSTRACT: Global ocean acidification is expected to chronically lower the pH to 7.3 (>2200 µatm seawater pCO2) by the year 2300. Acute hypercapnia already
Inhibition of biofilm formation by rough shark skin-patterned surfaces Hsiu-Wen Chien, Xiang-Yu Chen, Wen-Pei Tsai, Mengshan Lee ABSTRACT: In this study, we investigate the microscale structure of shark skin denticles at abdomen (A) and fin (F) locations, analyze the roughness and wetting properties related to their microstructures, and evaluate the effect of the surface properties
Extinction risk and conservation of critically endangered angel sharks in the Eastern Atlantic and Mediterranean Sea Julia M Lawson, Riley A Pollom, Cat A Gordon, Joanna Barker, Eva K M Meyers, Heike Zidowitz, Jim R Ellis, Álex Bartolí, Gabriel Morey, Sarah L Fowler, David Jiménez Alvarado, Sonja V Fordham, Rowland Sharp, Ali R Hood, Nicholas
Using baited remote underwater videos (BRUVs) to characterize chondrichthyan communities in a global biodiversity hotspot Geoffrey J. Osgood, Meaghen E. McCord, Julia K. Baum ABSTRACT: Threatened chondrichthyan diversity is high in developing countries where scarce resources, limited data, and minimal stakeholder support often render conservation efforts challenging. As such, data on many species, including many
Visual Opsin Diversity in Sharks and Rays Nathan S Hart, Trevor D Lamb, Hardip R Patel, Aaron Chuah, Riccardo C Natoli, Nicholas J Hudson, Scott C Cutmore, Wayne I L Davies, Shaun P Collin, David M Hunt ABSTRACT: The diversity of color vision systems found in extant vertebrates suggests that different evolutionary selection pressures have
DNA Analysis of Juvenile Scalloped Hammerhead Sharks Sphyrna lewini (Griffith, 1834) Reveals Multiple Breeding Populations and Signs of Adaptive Divergence in the South Pacific Amandine D. Marie, Brian L. Stockwell, Ciro Rico ABSTRACT: Shark species have undergone drastic population declines in recent decades due to overfishing and habitat destruction; thus, establishing connectivity among the populations