Results 51 to 60 of about 1,528 (194)

The Unseen Crisis of Sharks and Rays in Senegal

Ecology and Evolution, Volume 16, Issue 4, April 2026.
This study presents a conservative quantitative assessment of shark and ray landings and trade in Senegal, revealing extensive exploitation of threatened species. Surveys at two major artisanal processing sites in the Casamance region recorded over 170,000 individuals, mostly rays, with nearly all biomass comprising species at risk of extinction, and ...
Rima W. Jabado, Luc Badji, Ryan Charles, Christoph A. Rohner   +3 more
wiley   +1 more source

Revealing elasmobranch diversity across the Cretaceous-Paleogene boundary in the Central Tethys (Byala, Bulgaria) [PDF]

Fossil Record
Extensive bulk-sampling of the continuous K-Pg succession at Byala (Central Tethys) provides high-resolution insights into elasmobranch responses to the end-Cretaceous mass extinction of a deep-marine environmental setting. The studied section represents
Iris Feichtinger, Bernhard Beaury, Guillaume Guinot, Mathias Harzhauser, Thomas Nichterl, Kristalina Stoykova, Jürgen Pollerspöck   +6 more
doaj   +3 more sources

Life history traits of the Blackspotted smooth-hound Mustelus punctulatus (Carcharhiniformes: Triakidae) in the Adriatic Sea

Natura Croatica : Periodicum Musei Historiae Naturalis Croatici, 2021
We present demographic and reproductive parameters of commercially exploited shark, blackspotted smooth-hound (Mustelus punctulatus), based on samples from 117 males and 108 females from the Adriatic Sea. Calculated size and age at maturity were 83.1 cm in total length (TL) and 6.6 years for males and 100.0 cm TL and 12.5 years for females.
Gračan, Romana, Polak, Tanja, Lazar, Bojan   +2 more
openaire   +4 more sources

Length–Weight and Condition Factor of 14 Elasmobranch Species Caught as Bycatch by Artisanal Shrimp Trawls in a Coastal Lagoon System From Northwest Mexico

Journal of Applied Ichthyology, Volume 2026, Issue 1, 2026.
The lack of biometric data on chondrichthyan species has impeded the implementation of management strategies essential for the conservation of sharks and rays captured using different fishing gears in coastal ecosystems. This study aims to assess morphometric relationships (length–weight [LW], length–dorsal length [DL], and length–disc width [DW]) and ...
Adrián Felipe González-Acosta, Carlos Hiram Rábago-Quiroz, Gorgonio Ruiz-Campos, Juan Antonio García-Borbón, María del Carmen Alejo-Plata, Joaquín David Magaña, Upali S. Amarasinghe   +6 more
wiley   +1 more source

Sharks of the order Carcharhiniformes from the British Coniacian, Santonian and Campanian (Upper Cretaceous). [PDF]

, 2008
Bulk sampling of phosphate-rich horizons within the British Coniacian to Campanian (Upper Cretaceous) yielded very large samples of shark and ray teeth.
AGASSIZ L. J. R., ANTUNES M. T., BLAINVILLE H. M. D. de, BONE A., BONE A., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CAPPETTA H., CASE G. R., CASE G. R., COMPAGNO L. J. V., CUMBAA S. L., DAIMERIES A., DALINKEVICIUS J. A., DAVIS J. W., DINELEY D. L., FLETCHER T. P., FOWLER H. W., GARMAN S., GILL T., GRAY J. E., GURR P. R., HALTER M. C., HAY O. P., HERMAN J., HERMAN J., HERMAN J., HERMAN J., JARVIS I., JARVIS I., JARVIS I., JORDAN D. S., LERICHE M., LINNAEUS C., MARCK W. von der, MORTIMORE R. N., MULLER A., MULLER A., MULLER J., NOUBHANI A., SHIRAI S., SIVERSON M., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., UNDERWOOD C. J., WAGNER J. A., WELTON B. J., WHITE H. G. O., WILLCOX N. R., WOODROOF P. B., WOODWARD A. S.   +55 more
core   +1 more source

Population structure, distribution and abundance patterns of the patagonian smoothhound Mustelus schmitti Springer, 1939 (Chondrichthyes, Elasmobranchii, Triakidae) in the rio de La Plata and inner continental shelf , sw Atlantic ocean (34º30'-39º30'S)

Brazilian Journal of Oceanography, 2007
A total number of 4824 Mustelus schmitti was sampled. Females ranged from 25 to 93 cm in spring and from 28 to 90 cm in summer. Males ranged from 34 to 82 and from 28 to 77 cm, respectively.
María Cristina Oddone, Laura Paesch, Walter Norbis, Gonzalo Velasco   +3 more
doaj   +1 more source

Predictive habitat suitability models to aid conservation of elasmobranch diversity in the central Mediterranean Sea [PDF]

, 2015
Commercial fisheries have dramatically impacted elasmobranch populations worldwide. With high capture and bycatch rates, the abundance of many species is rapidly declining and around a quarter of the world’s sharks and rays are threatened with extinction.
A Dell’Apa, A Gouraguine, A Lomba, A Maldonado, AH Welsh, AJ Richardson, Antoine Guisan, B Gratwicke, B Planque, CD Maravelias, CD Maravelias, CS Martin, CW Speed, D Damalas, D Dunn, D Levi, E Hunter, E Massutí, F Ferretti, F Fiorentino, G Aarts, G Garofalo, G Garofalo, G Garofalo, G Tserpes, J Bertrand, J Elith, J Ellis, J Skjæraasen, JD Stevens, JM Potts, K Béranger, M Gristina, M McArthur, M Pardo, M Valls, MB Araújo, MG Pennino, MR Heithaus, N Dulvy, P Colantoni, P Cotton, P Dutilleul, P Petitgas, S Dueri, S Heinänen, S Jukic-Peladic, S Katsanevakis, S Ragonese, SC Barry, SJ Pittman, SJ Pittman, T Hopkins, T Martin, T Rangel, T Russo, V Lauria, V Lauria, VN De Jonge, Y Aldebert   +59 more
core   +2 more sources

Assessment of a Social Media‐Based Method for Determining Raptor Diet

Ecology and Evolution, Volume 15, Issue 6, June 2025.
This study mined social media as a citizen science method to reduce the time burden and biases associated with recording accurate diet information for predators. In total, 1985 prey observations were recorded of two Australian coastal raptors and were used to produce diet profiles that were compared by region, social media platform, and against other ...
Leo Biggs, Greg S. Baxter, Stephen J. S. Debus, Neal Finch, Anysha Riggs, Hayden Houweling, Melissa Appleby, Peter J. Murray   +7 more
wiley   +1 more source

Preliminary study on age, growth and reproduction of Mustelus mustelus (Elasmobranchii: Carcharhiniformes: Triakidae) inhabiting the Gulf of Iskenderun, north-eastern Mediterranean Sea [PDF]

Acta Ichthyologica et Piscatoria, 2018
Background. Shark populations within the eastern Mediterranean are declining due to overfishing. Unfortunately, our knowledge on the biology of sharks and specifically dogfishes within eastern Mediterranean is extremely limited due to the lack of ...
E.I. Ozcan, N. Başusta
doaj   +3 more sources

Consumption to biomass (Q/B) ratio and estimates of Q/B-predictor parameters for Caribbean fishes [PDF]

, 2002
Estimates of the Q/B ratio and parameters of equations to 'predict' Q/B values for 116 fish stocks in the Gulf of Salamanca, Colombia are presented. A compilation of these estimates available for Caribbean Sea fishes (264 stocks) is also provided for ...
Duarte, L.O., Garcia, C.B.
core