Results 11 to 20 of about 16,877 (294)

Gill function in an elasmobranch [PDF]

Zeitschrift f�r Vergleichende Physiologie, 1971
Highly efficient oxygen uptake in elasmobranchs, as indicated by frequent excess of PaO2 over PEO2 has previously been ascribed to the operation of multicapillary rather than counter-current gas exchange by the gills. Analysis of models shows that, at maximum efficiency, a multicapillary system cannot account for values of PaO2 greater than (PIO2+PEO2)/
Grigg, GC, Read, J
openaire   +3 more sources

Distribution of skates and sharks in the North Sea: 112 years of change [PDF]

, 2016
How have North Sea skate and shark assemblages changed since the early 20th century when bottom trawling became widespread, whilst their environment became increasingly impacted by fishing, climate change, habitat degradation and other anthropogenic ...
Ellis, JR, Engelhard, GH, García-Carreras, B, Lynam, CP, Sguotti, C   +4 more
core   +1 more source

Universal closed-tube barcoding for monitoring the shark and ray trade in megadiverse conservation hotspots

iScience, 2023
Summary: Trade restrictions for endangered elasmobranch species exist to disincentivise their exploitation and curb their declines. However, trade monitoring is challenging due to product variety and the complexity of import/export routes. We investigate
Andhika P. Prasetyo, Marine Cusa, Joanna M. Murray, Firdaus Agung, Efin Muttaqin, Stefano Mariani, Allan D. McDevitt   +6 more
doaj   +1 more source

Satellite Remote Sensing in Shark and Ray Ecology, Conservation and Management

Frontiers in Marine Science, 2019
Global elasmobranch populations have declined dramatically over the past 50 years, and continued research into the drivers of their habitats and distributions is vital for improved conservation and management.
Michael J. Williamson, Michael J. Williamson, Emma J. Tebbs, Terence P. Dawson, David M. P. Jacoby   +4 more
doaj   +1 more source

Mitigation of Elasmobranch Bycatch in Trawlers: A Case Study in Indian Fisheries

Frontiers in Marine Science, 2020
Bycatch poses a significant threat to marine megafauna, such as elasmobranchs. India has one of the highest elasmobranch landings globally, through both targeted catch and bycatch.
Trisha Gupta, Hollie Booth, William Arlidge, Chetan Rao, Muralidharan Manoharakrishnan, Naveen Namboothri, Kartik Shanker, Kartik Shanker, E. J. Milner-Gulland   +8 more
doaj   +1 more source

Diversity and distribution of elasmobranchs in the coastal waters of Cyprus: using bycatch data to inform management and conservation

Frontiers in Marine Science, 2023
IntroductionLoss of biodiversity in marine ecosystems is a globally acknowledged problem. To address this and avoid extinctions, improved conservation is required to protect and restore our oceans.
Martha O’Keefe, Elizabeth G. T. Bengil, Elizabeth G. T. Bengil, Josie L. Palmer, Damla Beton, Çiğdem Çağlar, Brendan J. Godley, Meryem Özkan, Robin T. E. Snape, Robin T. E. Snape, Annette C. Broderick   +10 more
doaj   +1 more source

Artisanal elasmobranch fisheries of northwestern Baja California, Mexico

Ciencias Marinas, 2020
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
Omar Santana-Morales, Daniel Cartamil, Oscar Sosa-Nishizaki, Rebeca Zertuche-Chanes, Enrique Hernández-Gutiérrez, Jeffrey Graham   +5 more
doaj   +1 more source

An Exploratory Study of Telomere Length in the Deep-Sea Shark, Etmopterus granulosus

Frontiers in Marine Science, 2021
The history of elasmobranch ageing highlights the difficulty of age estimation in animals lacking ossified structures. Ageing techniques are numerous, yet all are limited by difficulties of validation and verification and inherent subjectivity.
Melissa C. Nehmens, Rebecca M. Varney, Alexis M. Janosik, David A. Ebert, David A. Ebert, David A. Ebert   +5 more
doaj   +1 more source

Oviparous elasmobranch development inside the egg case in 7 key stages. [PDF]

PLoS ONE, 2018
Embryological stages of oviparous elasmobranch during development can be difficult to identify, requiring magnification and/or fixation of an anaesthetized embryo.
Syafiq M Musa, Molly V Czachur, Holly A Shiels   +2 more
doaj   +1 more source

Additions to the Taxonomy of the Antarctic Dark-Mouth Skate Bathyraja arctowskii (Dollo, 1904), with Descriptions of the Syntypes and Morphology of Teeth, Dermal Denticles and Thorns

Diversity, 2023
The taxonomy of the enigmatic dark-mouth skate, Bathyraja arctowskii (Dollo, 1904), from the Southern Ocean was finally resolved after more than 100 years of ambiguity in 2021.
Simon Weigmann, Thomas Reinecke
doaj   +1 more source