Scientific Papers

Standardized data to support conservation prioritization for sharks and batoids

Standardized data to support conservation prioritization for sharks and batoids

Standardized data to support conservation prioritization for sharks and batoids (Elasmobranchii) Rikke Oegelund Nielsen, Rita da Silva, Jacqueline Juergens, Johanna Staerk, Line Lindholm Sørensen, John Jackson, Simeon Quirinus Smeele, Dalia A. Conde ABSTRACT: We collated and synthesized information on 1,226 Elasmobranch species (i.e., sharks, rays, and skates) globally from a wide range of sources. We

Comparative morphology of shark pectoral fins

Comparative morphology of shark pectoral fins

Comparative morphology of shark pectoral fins Sarah L. Hoffmann, Thaddaeus J. Buser, Marianne E. Porter ABSTRACT: Sharks vary greatly in morphology, physiology, and ecology. Differences in whole body shape, swimming style, and physiological parameters have previously been linked to varied habitat uses. Pectoral fin morphology has been used to taxonomically classify species and hypotheses on

The immunoglobulins of cartilaginous fishes

The immunoglobulins of cartilaginous fishes

The immunoglobulins of cartilaginous fishes Hanover Matz, Danish Munir, James Logue, Helen Dooley ABSTRACT: Cartilaginous fishes, comprising the chimeras, sharks, skates, and rays, split from the common ancestor with other jawed vertebrates approx. 450 million years ago. Being the oldest extant taxonomic group to possess an immunoglobulin (Ig)-based adaptive immune system, examination of this group

Over 90 endangered fish and invertebrates are caught in industrial fisheries

Over 90 endangered fish and invertebrates are caught in industrial fisheries

Over 90 endangered fish and invertebrates are caught in industrial fisheries Roberson, L.A., Watson, R.A. & Klein, C.J. ABSTRACT: Industrial-scale harvest of species at risk of extinction is controversial and usually highly regulated on land and for charismatic marine animals (e.g. whales). In contrast, threatened marine fish species can be legally caught in industrial fisheries.

Uncovering the ecological roles and importance of rays

Uncovering the ecological roles and importance of rays

Buried in the sand: Uncovering the ecological roles and importance of rays Kathryn I. Flowers, Michael R. Heithaus, Yannis P. Papastamatiou ABSTRACT: Rays (superorder Batoidea) are the most diverse group of elasmobranchs, and many are threatened with extinction. However, there remain areas where research on the ecology of this group is lacking, from trophic interactions

When large marine predators feed on fisheries catches

When large marine predators feed on fisheries catches

When large marine predators feed on fisheries catches: Global patterns of the depredation conflict and directions for coexistence Paul Tixier, Mary‐Anne Lea, Mark A. Hindell, Dirk Welsford, Camille Mazé, Sophie Gourguet, John P. Y. Arnould ABSTRACT: The sustainable mitigation of human–wildlife conflicts has become a major societal and environmental challenge globally. Among these conflicts, large

Sex differentiation in seasonal distribution of the starry smooth‐hound

Sex differentiation in seasonal distribution of the starry smooth‐hound

Sex differentiation in seasonal distribution of the starry smooth‐hound Mustelus asterias Niels W. P. Brevé, Hendrik V. Winter, Paul A. D. M. Wijmans, Eleanor S. I. Greenway, Leopold A. J. Nagelkerke ABSTRACT: This mark‐recapture study of starry smooth‐hound Mustelus asterias tagged during the summer months near the Dutch coast demonstrates a large‐scale spatial sex differentiation

Distributional records of giant freshwater stingray in Indonesia

Distributional records of giant freshwater stingray in Indonesia

Updating status of the distributional records of giant freshwater stingray Urogymnus polylepis (Bleeker, 1852) in Indonesia Muhammad Iqbal, Arum Setiawan, Yuanita Windusari, Indra Yustian, Hilda Zulkifli ABSTRACT: The Giant Freshwater Stingray Urogymnus polylepis (Bleeker, 1852) has been known from several drainages in Sunda land (Sumatra, Kalimantan and Java). We compiled most recent update records of

Asymptotic Growth of Whale Sharks Suggests Sex-Specific Life-History Strategies

Asymptotic Growth of Whale Sharks Suggests Sex-Specific Life-History Strategies

Asymptotic Growth of Whale Sharks Suggests Sex-Specific Life-History Strategies Mark G. Meekan, Brett M. Taylor, Emily Lester, Luciana C. Ferreira, Ana M. M. Sequeira, Alistair D. M. Dove, Matthew J. Birt, Alex Aspinall, Kim Brooks, Michele Thums ABSTRACT: Age and growth data are central to management or conservation strategies for any species. Circumstantial evidence suggests

Stock Status Estimating of 5 Shark Species in the Waters Around Taiwan

Stock Status Estimating of 5 Shark Species in the Waters Around Taiwan

Stock Status Estimating of 5 Shark Species in the Waters Around Taiwan Using a Length-Based Bayesian Biomass Estimation (LBB) Method Peilong Ju, Mingru Chen, Yongjun Tian, Yu Zhao, Shengyun Yang, Jiamei Xiao ABSTRACT: Five shark stocks in the waters around Taiwan were assessed using the LBB method, addressing the present gap. Among them, only one

An estimate of the number of white sharks interacting with ecotourism in Guadalupe Island

An estimate of the number of white sharks interacting with ecotourism in Guadalupe Island

An estimate of the number of white sharks Carcharodon carcharias interacting with ecotourism in Guadalupe Island Edgar E. Becerril‐García, Edgar M. Hoyos‐Padilla, Omar Santana‐Morales, Miguel A. Gutiérrez‐Ortiz, Arturo Ayala‐Bocos, Felipe Galván‐Magaña ABSTRACT: The aim of the present study is to provide an estimate of the number of white sharks Carcharodon carcharias that seasonally interact with

Reproductive cycle and fecundity of finetooth sharks from the Northwest Atlantic Ocean

Reproductive cycle and fecundity of finetooth sharks from the Northwest Atlantic Ocean

Re‐evaluation of reproductive cycle and fecundity of finetooth sharks Carcharhinus isodon (Valenciennes 1839) from the Northwest Atlantic Ocean, with new observations on ovarian cycle and reproductive endocrinology of biennially reproducing sharks Amanda N. Brown, Bryan S. Frazier, Jim Gelsleichter ABSTRACT: To provide updated information on life history for improved fishery management, the reproductive cycle of

Spermatogenesis in mature male scalloped hammerhead sharks

Spermatogenesis in mature male scalloped hammerhead sharks

A first observation of spermatogenesis in mature male scalloped hammerheads (Sphyrna lewini) from Zinkwazi, KwaZulu-Natal, South Africa Coetzee, H.J., Naidoo, K. & Wagenaar, I. ABSTRACT: Sharks are not only threatened, but also have a low fecundity as they are being overfished. The shark family, Sphyrnidae, consists of nine species of which three are found in

Using perceptions to examine human responses to blanket bans: The case of the thresher shark landing-ban in Sri Lanka

Using perceptions to examine human responses to blanket bans: The case of the thresher shark landing-ban in Sri Lanka

Using perceptions to examine human responses to blanket bans: The case of the thresher shark landing-ban in Sri Lanka Claire Collins, Tom Bech Letessier, Annette Broderick. Isuru Wijesundara, Ana Nuno ABSTRACT: Species-specific bans are increasingly being implemented to stem loss of vulnerable marine species, but there is a paucity of evaluative research into resulting socio-economic

Reproductive biology of two pelagic sharks in the eastern Atlantic Ocean

Reproductive biology of two pelagic sharks in the eastern Atlantic Ocean

Aspects of the reproductive biology of two pelagic sharks in the eastern Atlantic Ocean Feng Wu, Richard Kindong, Xiaojie Dai, Ousmane Sarr, Jiangfeng Zhu, Siquan Tian, Yunkai Li, Bruno T. N. Nsangue ABSTRACT: This study used data provided by the Chinese Longline Fishery Scientific Observer Programme from the tropical eastern Atlantic Ocean to estimate the