Scientific Papers

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark, the bonnethead, Sphyrna tiburo (L. 1758), in the southern Gulf of Mexico D. Palacios‐Hernández, J.L. Castillo‐Géniz, I. Méndez‐Loeza, J.C. Pérez‐Jiménez ABSTRACT: In the southern Gulf of Mexico, the bonnethead shark, Sphyrna tiburo, is one of the most frequently captured species in landings of

Impact of a simulated marine heatwave in the hematological profile of a temperate shark

Impact of a simulated marine heatwave in the hematological profile of a temperate shark

Impact of a simulated marine heatwave in the hematological profile of a temperate shark (Scyliorhinus canicula) Maria Rita Pegado, Catarina P.Santos, Dayanne Raffoul, Marta Konieczna, Eduardo Sampaio, Ana Luísa Maulvault, Mário Diniz, Rui Rosa ABSTRACT: As Earth’s temperature continues to rise, sudden warming events, designated as marine heatwaves (MHWs), are becoming more frequent and longer.

Artisanal elasmobranch fisheries of northwestern Baja California

Artisanal elasmobranch fisheries of northwestern Baja California

Artisanal elasmobranch fisheries of northwestern Baja California, Mexico Omar Santana-Morales, Daniel Cartamil, Oscar Sosa-Nishizaki, Rebeca Zertuche-Chanes, Enrique Hernández-Gutiérrez, Jeffrey Graham ABSTRACT: Elasmobranch species composition and spatiotemporal variability can often be characterized from landing surveys of local fisheries, with important management implications. In the present study, we describe the elasmobranch landing composition of 4 major artisanal

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans L Georgeson, C L Rigby, T J Emery, M Fuller, J Hartog, A J Williams, A J Hobday, C A J Duffy, C A Simpfendorfer, T Okuda, I C Stobutzki, S J Nicol ABSTRACT: Risks to deepwater chondrichthyans

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata: Managing a fishery after moratorium Ivone Figueiredo, Catarina Maia, Lucília Carvalho ABSTRACT: The undulate ray Raja undulata Lacepède is a coastal species common along the north‐eastern Atlantic Ocean and Mediterranean Sea and is highly accessible to coastal fisheries. Between 2009 and 2015, the species

Scalloped hammerhead sharks swim on their side with diel shifts in roll magnitude and periodicity

Scalloped hammerhead sharks swim on their side with diel shifts in roll magnitude and periodicity

Scalloped hammerhead sharks swim on their side with diel shifts in roll magnitude and periodicity Royer, M., Maloney, K., Meyer, C. et al. ABSTRACT: Background Great hammerhead sharks (Sphyrna mokarran) routinely swim on their sides and periodically roll from side to side. A previous study used wind tunnel tests with a rigid model hammerhead shark

Revision of the sixgill sawsharks, genus Pliotrema

Revision of the sixgill sawsharks, genus Pliotrema

Revision of the sixgill sawsharks, genus Pliotrema (Chondrichthyes, Pristiophoriformes), with descriptions of two new species and a redescription of P. warreni Regan Simon Weigmann, Ofer Gon, Ruth H. Leeney, Ellen Barrowclift, Per Berggren, Narriman Jiddawi, Andrew J. Temple ABSTRACT: Recent sampling efforts in Madagascar and Zanzibar, as well as examinations of six-gilled sawsharks in several

Catch composition and life history characteristics of sharks and rays landed in the Andaman and Nicobar Islands, India

Catch composition and life history characteristics of sharks and rays landed in the Andaman and Nicobar Islands, India

Catch composition and life history characteristics of sharks and rays (Elasmobranchii) landed in the Andaman and Nicobar Islands, India Zoya Tyabji, Tanmay Wagh, Vardhan Patankar, Rima W. Jabado, Dipani Sutaria ABSTRACT: The scientific literature on the diversity and biological characteristics of sharks and rays from the Andaman and Nicobar Archipelago fishing grounds is scarce and

Effects of exposure to large sharks on the abundance and behavior of mobile prey fishes

Effects of exposure to large sharks on the abundance and behavior of mobile prey fishes

Effects of exposure to large sharks on the abundance and behavior of mobile prey fishes along a temperate coastal gradient Brendan D. Shea, Connor W. Benson, Christine de Silva, Don Donovan, Joe Romeiro, Mark E. Bond, Scott Creel, Austin J. Gallagher ABSTRACT: Top predators can exert strong influences on community structure and function, both via

Male-biased sexual size dimorphism in sharks

Male-biased sexual size dimorphism in sharks

Male-biased sexual size dimorphism in sharks: the narrowmouth catshark Schroederichthys bivius as case study Colonello, J.H., Cortés, F. & Belleggia, M. ABSTRACT: In shark populations, variation in sexual size dimorphism (SSD) appears to be related with the reproductive mode. Here, we aimed to investigate the reproductive biology of the narrowmouth catshark Schroederichthys bivius, an oviparous

Genetic connectivity and diversity of endangered species the scalloped hammerhead shark population in Indonesia and Western Indian Ocean

Genetic connectivity and diversity of endangered species the scalloped hammerhead shark population in Indonesia and Western Indian Ocean

Genetic connectivity and diversity of endangered species the scalloped hammerhead shark Sphyrna lewini (Griffith & Smith 1834) population in Indonesia and Western Indian Ocean Sutanto Hadi, Noviar Andayani, Effin Muttaqin, Benaya M Simeon, Muhammad Ichsan, Beginer Subhan, Hawis Madduppa ABSTRACT: The scalloped hammerhead shark Sphyrna lewini is an endangered species which expected to population declined

Coastal breeding aggregations of threatened stingrays and guitarfish in the Levant

Coastal breeding aggregations of threatened stingrays and guitarfish in the Levant

Coastal breeding aggregations of threatened stingrays and guitarfish in the Levant Shahar Chaikin, Jonathan Belmaker, Adi Barash ABSTRACT: 1. Stingrays and guitarfish are globally threatened by overexploitation, particularly so in the Mediterranean Sea. Nevertheless, very little information is known about their ecology, behaviour, and taxonomy in the Mediterranean, and especially in the Levant, where water

Non‐lethal assessment of reproductive stage for female blue sharks

Non‐lethal assessment of reproductive stage for female blue sharks

Non‐lethal assessment of reproductive stage for female blue sharks Prionace glauca using sex steroid hormones Y. Fujinami, Y. Semba ABSTRACT: We analysed plasma concentrations of progesterone (P4) and 17β‐oestradiol (E2) in juvenile, pre‐ovulatory, early, mid‐, or late‐pregnancy stages of female blue sharks Prionace glauca. Concentrations of P4 were significantly higher in pregnant than in non‐pregnant

Trends in Chondrichthyan Research

Trends in Chondrichthyan Research

Trends in Chondrichthyan Research: An Analysis of Three Decades of Conference Abstracts D. S. Shiffman, M. J. Ajemian, J. C. Carrier, T. S. Daly-Engel, M. M. Davis, N. K. Dulvy, R. D. Grubbs, N. A. Hinojosa, J. Imhoff, M. A. Kolmann, C. S. Nash, E. W. M. Paig-Tran, E. E. Peele, R. A. Skubel, B.

Mercury (Hg) and selenium (Se) content in the shark Mustelus henlei

Mercury (Hg) and selenium (Se) content in the shark Mustelus henlei

Mercury (Hg) and selenium (Se) content in the shark Mustelus henlei (Triakidae) in the northern Mexican Pacific Sergio Alonzo Medina-Morales, David Corro-Espinosa, Ofelia Escobar-Sánchez, Carolina Guadalupe Delgado-Alvarez, Jorge Ruelas-Inzunza, Martin Gabriel Frías-Espericueta, Martin Enrique Jara-Marini, Federico Páez-Osuna ABSTRACT: Mercury and selenium were assessed in Mustelus henlei, which is a carnivorous predatory shark that is important