Results 61 to 70 of about 629 (159)
Ciencias Marinas, 1999 Daily commercial fishing data were used to determine the relative abundance of the shovelnose guitarfish Rhinobatos productus (Ayres, 1856) in Bahía Almejas, Baja California Sur (Mexico), from August 1991 to December 1995.
F Salazar-Hermoso +1 more
doaj +1 more source
Mitigating the effect of by‐catch on endangered marine life
Animal Conservation, Volume 28, Issue 2, Page 172-184, April 2025.Fishing gears cause substantial impacts on the oceans and their ecosystems, and many marine animals, such as sea turtles, marine mammals, seabirds and elasmobranchs, end up as by ‐catch. In this paper, the most effective mitigation measures were investigated for each group, taking into account the fishing gear with which they interact most.
M. Villafáfila +2 more
wiley +1 more source
Redescription of Southwestern Indian Ocean Guitarfishes Rhinobatos (Rhinopristiformes: Rhinobatidae) [PDF]
, 2022 The shark-like rays (Order Rhinopristiformes) are found worldwide and are among the most threatened species of cartilaginous fishes. The guitarfishes (Family Rhinobatidae) are one of five families in this order, with many species being assessed as ...
Aitchison, Rachel
core +3 more sources
Hematological parameters in shortnose guitarfish Zapteryx brevirostris Müller and Henle, 1841 (Chondrichthyes, Rhinobatidae) [PDF]
Revista Mvz Cordoba, 2015 Objective. In view of the deficiency of information in the area of clinical pathology of elasmobranchs, mainly of the physiological parameters, the aim of this work was to study hematological parameters of the Zapteryx brevirostris species. Materials and
Nathalia Barreto B. +3 more
doaj
Ray bioturbation rates suggest they shape estuary processes
Remote Sensing in Ecology and Conservation, Volume 11, Issue 1, Page 74-87, February 2025.This study used aerial drones to map daily ray bioturbation activity and extrapolated these patterns using aerial imagery to assess sediment displaced annually by rays during foraging activities at an estuary scale. Our results indicated rays displaced 1.20 (±0.68) tonnes of sediment per day within a 1443 m2 area in the Brisbane Water estuary.
Molly Grew +4 more
wiley +1 more source
, 2001 FIG. 1. — Neoheterocotyle ktarii n. sp.; A, animal in toto, vue ventrale; B, crochets postérieurs, noter l'importance relative de la pointe; C-E, sclérites dorsaux du hapteur; C, sclérite latéral; D, sclérite latéral axial; E, sclérite médian; F, G ...
Euzet, Louis +2 more
core +1 more source
Latin American Journal of Aquatic Research, 2012 Se presenta claves taxonómicas basadas en características morfológicas dentarias externas e internas, que permiten el reconocimiento de cada orden, familia y género de los batoídeos conocidos en Chile. En algunos casos, como en las familias Rhinobatidae,
Sylvia Sáez, Julio Lamilla
doaj
Vulnerability of Eastern Tropical Pacific chondrichthyan fish to climate change
Global Change Biology, Volume 30, Issue 7, July 2024.This assessment identifies sharks' vulnerability to climate change in a data‐poor tropical region and suggests management actions. Abstract Climate change is an environmental emergency threatening species and ecosystems globally. Oceans have absorbed about 90% of anthropogenic heat and 20%–30% of the carbon emissions, resulting in ocean warming ...
Florencia Cerutti‐Pereyra +18 more
wiley +1 more source
Can denticle morphology help identify southeastern Australian elasmobranchs?
Journal of Fish Biology, Volume 104, Issue 6, Page 1848-1859, June 2024.Abstract Elasmobranchs are covered in scale‐like structures called dermal denticles, comprising dentine and enameloid. These structures vary across the body of an individual and between species, and are frequently shed and preserved in marine sediments.
Mariah Appleby +3 more
wiley +1 more source
Fisher perceptions of catch and trade of sharks and rays in Angolan small‐scale fisheries
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 34, Issue 5, May 2024.Abstract Small‐scale fisheries ensure food security and employment in Angolan coastal communities. These dynamic, widespread fisheries remain mostly unregulated, with limited data available despite their likely significant impact on marine megafauna. We used an interview‐based survey to investigate local fisher interactions with elasmobranchs (sharks ...
Ana Lúcia Furtado Soares +1 more
wiley +1 more source