Results 41 to 50 of about 17,250 (288)

Evidence for the first multi-species shark nursery area in Atlantic Africa (Boa Vista Island, Cabo Verde)

open access: yesFrontiers in Marine Science, 2023
This study describes the first potential multi-species shark nursery area in Atlantic Africa (Sal Rei Bay – SRB, Boa Vista Island, Cabo Verde). From August 2016 to September 2019, 6162 neonates and juveniles of 5 different shark species were observed in ...
Rui Rosa   +26 more
doaj   +1 more source

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

open access: yes, 2011
Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza   +3 more
core   +1 more source

Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes) [PDF]

open access: yes, 2018
Analizamos el crecimiento y la reproducción de ejemplares de raya marmorada, Sympterygia bonapartii nacidas en cautiverio. Se obtuvieron ovicápsulas a partir de la oviposición de dos hembras capturadas en la naturaleza y mantenidas en el Acuario Temaikèn.
Abraham, Carolina   +4 more
core   +3 more sources

Bycatch Estimates From a Pacific Tuna Longline Fishery Provide a Baseline for Understanding the Long-Term Benefits of a Large, Blue Water Marine Sanctuary

open access: yesFrontiers in Marine Science, 2021
Bycatch on pelagic tuna longlines has contributed to population declines in several far-ranging, oceanic species and presents a conservation challenge that area-based management tools are increasingly promoted to address.
Vanessa Jaiteh   +7 more
doaj   +1 more source

A new species of Dermopristis Kearn, Whittington & Evans-Gowing, 2010 (Monogenea: Microbothriidae), with observations on associations between the gut diverticula and reproductive system and on the presence of denticles in the nasal fossae of the host Glaucostegus typus (Bennett) (Elasmobranchii: Rhinobatidae) [PDF]

open access: yes, 2011
Dermopristis cairae n. sp. (Microbothriidae) is described from the skin and possibly from the nasal fossae of the giant shovelnosed ray Glaucostegus typus (Bennett). The new species is distinguished from D.
EM Perkins   +14 more
core   +1 more source

Plasma 1α-Hydroxycorticosterone as Biomarker for Acute Stress in Catsharks (Scyliorhinus canicula)

open access: yesFrontiers in Physiology, 2019
Glucocorticoids are pleiotropic steroid hormones mediating redistribution of energy. They induce breakdown of glycogen stores and consequent plasma hyperglycaemia after stressful situations.
Ignacio Ruiz-Jarabo   +7 more
doaj   +1 more source

An integrated approach to tackling wildlife crime: Impact and lessons learned from the world's largest targeted manta ray fishery

open access: yesConservation Science and Practice, 2021
Manta rays (Mobula birostris and M. alfredi) are threatened by overexploitation for international trade. Indonesia was home to the world's largest documented manta fishery—Lamakera, in East Nusa Tenggara.
Hollie Booth   +13 more
doaj   +1 more source

Hatching Strategies in Monogenean (Platyhelminth) Parasites that Facilitate Host Infection [PDF]

open access: yes, 2011
In parasites, environmental cues may influence hatching of eggs and enhance the success of infections. The two major endoparasitic groups of parasitic platyhelminths, cestodes (tapeworms) and digeneans (flukes), typically have high fecundity, infect more
Armstrong   +13 more
core   +1 more source

Conservation Biology of Elasmobranchs [PDF]

open access: yes, 1993
Elasmobranchs are vital and valuable components of the marine biota. From an ecological perspective they occupy the role of top predators within marine food webs, providing a regulatory control that helps balance the ecosystem.

core  

Geometric factors influencing the diet of vertebrate predators in marine and terrestrial environments [PDF]

open access: yes, 2014
Predator–prey relationships are vital to ecosystem function and there is a need for greater predictive understanding of these interactions. We develop a geometric foraging model predicting minimum prey size scaling in marine and terrestrial vertebrate ...
Bielby, Jon   +5 more
core   +1 more source

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