Scientific Papers

Blacktip reefshark individual’s identification in Morotai waters

Blacktip reefshark individual’s identification in Morotai waters

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

Tonic immobility induction and duration on halmahera walking shark

Tonic immobility induction and duration on halmahera walking shark

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 in Java Sea

Assessing stock status of grey sharpnose shark in Java Sea

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

BRUVS reveal locally extinct shark and the way for shark monitoring in Brazilian oceanic islands

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.

Denticle corrosion caused by ocean acidification conditions in a demersal shark species

Denticle corrosion caused by ocean acidification conditions in a demersal shark species

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

Inhibition of biofilm formation by rough shark skin-patterned surfaces

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

Extinction risk and conservation of critically endangered angel sharks

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 to characterize chondrichthyan communities

Using baited remote underwater videos to characterize chondrichthyan communities

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

Visual Opsin Diversity in Sharks and Rays

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 Reveals Multiple Breeding Populations

DNA Analysis of Juvenile Scalloped Hammerhead Sharks Reveals Multiple Breeding Populations

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

Effects of short-term capture on the physiology of white sharks

Effects of short-term capture on the physiology of white sharks

Effects of short-term capture on the physiology of white sharks Carcharodon carcharias: amino acids and fatty acids Austin J. Gallagher, Lauren Meyer, Heidi R. Pethybridge, Charlie Huveneers, Paul A. Butcher ABSTRACT: Empirical evaluations of how overexploited marine fishes respond to capture stress (physiologically and behaviourally) have become increasingly important for informed fisheries management. These types

Fisheries and conservation assessment of sharks in Pacific Panama

Fisheries and conservation assessment of sharks in Pacific Panama

Fisheries and conservation assessment of sharks in Pacific Panama Hector M. Guzman, Roberto Cipriani, Angel J. Vega, Jorge Manuel Morales‐Saldaña ABSTRACT: 1. In Panama, shark fisheries were initially developed in the 1980s and progressively increased in production in the 1990s mainly due to the high demand for shark fins and meat from the international Asian

A new strategy proposal to monitor ray fins landings in south‐east Brazil

A new strategy proposal to monitor ray fins landings in south‐east Brazil

A new strategy proposal to monitor ray fins landings in south‐east Brazil Rebeca Almeida Marques, Tainá Guimarães Julio, Antonio Mateo Sole‐Cava, Marcelo Vianna ABSTRACT: 1. Statistical fisheries data are usually obtained during landings, through rapid fish classification and their categorization under the trade names given to species or groups of species. However, species classification is

Effects of fishing practice changes on pelagic shark longline captures in the Gulf of Gabes

Effects of fishing practice changes on pelagic shark longline captures in the Gulf of Gabes

Effects of fishing practice changes on pelagic shark longline captures in the Gulf of Gabes, Tunisia Bechir Saidi, Sami Karaa, Samira Enajjar, Mohamed. N. Bradaï ABSTRACT: 1. In order to increase their catches, longliners targeting sharks in the Gulf of Gabes, Tunisia, have increased the number of hooks per basket and have included new bait

The business study of shark fishing with bottom longline in Kutaraja Fishing Port

The business study of shark fishing with bottom longline in Kutaraja Fishing Port

The business study of shark fishing with bottom longline in Kutaraja Fishing Port of Banda Aceh, Indonesia M A Chaliluddin, D Rianjuanda, R M Aprilla, L Afriani, R Fachruddin ABSTRACT: Kutaraja Fishing Port is the largest fishing port in Aceh Province located in Lampulo, Banda Aceh. Shark fishing in Aceh is very beneficial for fishermen