Results 1 to 10 of about 1,448 (172)

Age and growth of Zapteryx brevirostris (Elasmobranchii: Rhinobatidae) in southern Brazil [PDF]

open access: yesNeotropical Ichthyology, 2018
Age and growth studies are fundamental to successful fisheries management. Zapteryx brevirostris (Müller & Henle, 1841) is distributed off the Brazilian continental shelf and this species is assessed as “Vulnerable” in the Red List of the International ...
Wanessa P. D. Carmo   +2 more
doaj   +10 more sources

Population productivity of shovelnose rays: Inferring the potential for recovery. [PDF]

open access: yesPLoS ONE, 2019
There is recent evidence of widespread declines of shovelnose ray populations (Order Rhinopristiformes) in heavily fished regions. These declines, which are likely driven by high demand for their fins in Asian markets, raises concern about their risk of ...
Brooke M D'Alberto   +3 more
doaj   +2 more sources

Revision of the fossil batomorphs from the Cretaceous of Lebanon, and their impact on our understanding of the early step of the evolution of the clade [PDF]

open access: yesResearch & Knowledge, 2017
Lebanon is endowed with its outstanding preservation lagerstätten of fossil fish from the Upper Cretaceous. The batomorphs are represented by 16 species of Rajiformes belonging to 9 genera and 4 families however, their phylogeny remains poorly understood.
Georges Kachacha   +3 more
doaj   +1 more source

Some monogenoidea parasitic on peruvian marine fishes, with description of Anoplocotyloides chorrillensis new species and new records

open access: yesMemorias do Instituto Oswaldo Cruz, 1991
The presence of four Monogenoidea parasitic on marine fishes from the central Peruvian coast is recorded. One of them, Anoplocotyloides chorrillensis (Monocotylidae) described from the gills of Rhinobatos planiceps (Rhinobatidae) is considered a new ...
José Luis Luque, José Iannacone
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

Diversification of the Neoselachii (Chondrichthyes) during the Jurassic and Cretaceous [PDF]

open access: yes, 2006
The Neoselachii are a monophyletic group including all of the extant sharks and rays. They underwent rapid diversification throughout the Jurassic and Cretaceous, going from low-diversity assemblages of members of extinct orders in the Late Triassic to ...
Underwood, Charlie J.
core   +1 more source

Proleptus acutus Dujardin, 1845 (Nematoda, Physalopteridae) parasite of rays Zapteryx brevirostris Müller & Henle, 1841 (Rhinobatiformes, Rhinobatidae) in Brazil Proleptus acutus Dujardin, 1845 (Nematoda, Physalopteridae) parasita de raias Zapteryx brevirostris Müller & Henle, 1841 (Rhinobatiformes, Rhinobatidae) no Brasil

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2008
Relata-se a ocorrência de Proleptus acutus Dujardin, 1845 (Nematoda, Physalopteridae) parasitando Zapteryx brevirostris Müller & Henle, 1841 (Rhinobatiformes, Rhinobatidae) em Ubatuba, estado de São Paulo, Brasil. Vinte raias foram analisadas e P. acutus
R.J. Silva   +6 more
doaj   +1 more source

Genetic diversity in two threatened species of guitarfish (Elasmobranchii: Rhinobatidae) from the Brazilian and Argentinian coasts: an alert for conservation

open access: yesNeotropical Ichthyology, 2021
The guitarfishes Pseudobatos horkelii and Pseudobatos percellens meet the criteria for threatened status as Critically Endangered (CR) and Endangered (EN), respectively. Both species occur in the Southern Atlantic Ocean.
Vanessa P. Cruz   +14 more
doaj   +1 more source

Feeding of guitarfish Rhinobatos percellens (Walbaum, 1972) (Elasmobranchii, Rhinobatidae), the target of artisanal fishery in Southern Brazil

open access: yesBrazilian Journal of Oceanography, 2010
Rhinobatos percellens is one of three species of Rhinobatidae found on Brazilian shores and is one of the most abundant species on the shallow continental shelf of Paraná and Santa Catarina States.
Hugo Bornatowski   +2 more
doaj   +1 more source

Sharks, Rays and a Chimaeroid from the Kimmeridgian (Late Jurassic) of Ringstead, Southern England [PDF]

open access: yes, 2002
Sampling of a lenticular concentration of vertebrate debris and associated sediments from the lower Kimmeridgian of southern England has allowed the study of a diverse and abundant assemblage of chondrichthyan remains.
Underwood, Charlie J.
core   +1 more source

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