Results 1 to 10 of about 1,692 (159)

New record of Frilled shark Chlamydoselachus anguineus Garman, 1884 (Chondrichthyes: Hexanchiformes) in the South Pacific Ocean [PDF]

PeerJ
Frilled sharks are rarely observed and limited information is available regarding their life history. The global number of records for these sharks does not exceed 40, with most sightings reported in the Western Pacific Ocean.
Maria J. Indurain, Angel Mancilla, Leandro Brizuela, Carolina Vargas-Caro, Carlos Bustamante   +4 more
doaj   +3 more sources

Morphological and molecular evidence of the Antarctic sleeper shark Somniosus antarcticus (Somniosidae) in northern Chile [PDF]

PeerJ
Sleeper sharks (family Somniosidae) are large, slow-growing deep-sea sharks that are rarely documented in the southeastern Pacific, and records from the Chilean waters have remained taxonomically uncertain.
Angel Mancilla, Leandro Brizuela, Krishna Tapia, Carolina Vargas-Caro, Carlos Bustamante   +4 more
doaj   +3 more sources

Insights from three decades of IUCN Red List assessments catalyzing shark, ray, and chimaera conservation. [PDF]

Conserv Biol
Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Finucci B, Rigby CL, Dulvy NK, Cavanagh RD, Fowler S, Harrison LR, Lawson JM, Pollom R, Simpfendorfer CA, Walls RHL, Jabado RW.   +10 more
europepmc   +2 more sources

Reconstructing historical catch trends of threatened sharks and rays based on fisher ecological knowledge. [PDF]

Conserv Biol
Abstract Small‐scale fisheries often lack historical shark and ray catch information, hampering their management. We reconstructed historical catch trends and current fishing pressure by combining local ecological knowledge, satellite‐based vessel counts, and a short‐term landing‐site survey.
Leurs G, Jabado RW, Camará A, Dos Santos L, Nonque DM, Zuidewind TJ, Barry I, Campredon P, Blaschke B, de Boer K, Hijner N, Olff H, Pontes SL, Regalla A, Walsh MB, Govers LL.   +15 more
europepmc   +2 more sources

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework. [PDF]

Conserv Biol
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Swift DG, Barker AM, Driggers WB, Frazier BS, Adams DH, Gelsleichter JJ, Bethea DM, Deacy BM, Portnoy DS.   +8 more
europepmc   +2 more sources

Predictions of southern migration timing in coastal sharks under future ocean warming. [PDF]

Conserv Biol
Abstract Projected redistribution of marine species due to ocean warming may undermine current conservation efforts. Yet, there have been few studies on how ocean warming may alter migration timing. Across 5 years of acoustic telemetry data (2018–2022), we determined environmental drivers of southward migration timing for 6 migratory shark species from
Manz MH, Shipley ON, Cerrato RM, Hueter RE, Newton AL, Tyminski JP, Franks BR, Curtis TH, Fischer C, Zacharias JP, Scott C, Dunton KJ, Kneebone J, Peterson BJ, Scannell BJ, Dodd JF, Frisk MG.   +16 more
europepmc   +2 more sources

The biology and ecology of the Pacific sharpnose shark Rhizoprionodon longurio [PDF]

Ecology and Evolution, 2023
Amidst global declines in elasmobranch populations resulting predominantly from overfishing, the need to gather data regarding shark ecology is greater than ever.
Joel H. Gayford, Darren A. Whitehead
doaj   +2 more sources

Identifying hotspots of faunal data deficiency to direct urgent research and monitoring. [PDF]

Conserv Biol
Abstract Data deficiency is a substantial challenge for extinction risk assessments because incomplete data means we cannot accurately identify priority protected areas for conservation. Here, we use the International Union for Conservation of Nature (IUCN) distributions of amphibians, sharks and rays, fish, mammals, birds, and reptiles to identify ...
Hayward MW, Verdon-Kidd D, Colyvas K, Saxon E, Griffin AS.   +4 more
europepmc   +2 more sources

Linking extinction risk to the economic and nutritional value of sharks in small-scale fisheries. [PDF]

Conserv Biol
Abstract To achieve sustainable shark fisheries, it is key to understand not only the biological drivers and environmental consequences of overfishing, but also the social and economic drivers of fisher behavior. The extinction risk of sharks is highest in coastal tropical waters, where small‐scale fisheries are most prevalent.
Temple AJ, Berggren P, Jiddawi N, Wambiji N, Poonian CNS, Salmin YN, Berumen ML, Stead SM.   +7 more
europepmc   +2 more sources

First record of a neonate bluntnose sixgill shark (<i>Hexanchus griseus</i>) from Baja California Sur, Mexico. [PDF]

Ecol Evol
We provide a new record of a neonate sixgill shark from Baja California Sur, Mexico. The location and timing of this specimen provide important novel insight into the spatial and reproductive ecology of the species, both in the Mexican Pacific and more broadly.
Whitehead DA, Gayford JH.
europepmc   +2 more sources