Results 101 to 110 of about 17,250 (288)

Shedding light on the parasite communities and diet of the deep‐sea shark Deania profundorum (Smith & Radcliffe, 1912) (Squaliform: Centrophoridae) from the Avilés Canyon (southern Bay of Biscay)

Journal of Fish Biology, EarlyView.
Abstract Deep‐sea elasmobranchs are less resilient to the increasing scale of anthropogenic impacts such as fisheries, owing to their life‐history traits. The necessity for proper management measures is hampered by the scant knowledge on these taxa and their biology. Here we provide the first comprehensive insight into the parasite infracommunities and
Wolf Isbert, Cristina Rodríguez‐Cabello, Francisco E. Montero, Maite Carrassón, Inmaculada Frutos, Ana Pérez‐del‐Olmo   +5 more
wiley   +1 more source

The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine [PDF]

, 2005
The thorny skate (Amblyraja radiata) is a large species of skate that is endemic to the waters of the western north Atlantic in the Gulf of Maine.
Danley, Patrick D., Elzey, Scott, Howell, W. Huntting, Jurek, Joe, Kneebone, Jeff, Sulikowski, James A., Tsang, Paul C. W.   +6 more
core  

Multiple Cone Visual Pigments and the Potential for Trichromatic Colour Vision in Two Species of Elasmobranch [PDF]

, 2004
Elasmobranchs (sharks, skates and rays) are the modern descendents of the first jawed vertebrates and, as apex predators, often occupy the highest trophic levels of aquatic (predominantly marine) ecosystems.
Collin, Shaun P., Hart, Nathan S., Lisney, Thomas J., Marshall, N. Justin   +3 more
core   +1 more source

Age and growth of the endemic groovebelly stingray (Dasyatis hypostigma), a heavily exploited batoid in the Brazilian Meridional Margin (21–34° S)

Journal of Fish Biology, EarlyView.
Abstract Life‐history data are often lacking for exploited elasmobranchs, jeopardizing proper management and conservation measures for this vulnerable group. Herein, we provided age and growth estimates for the groovebelly stingray (Dasyatis hypostigma), a medium‐sized, heavily exploited batoid endemic to the southwestern Atlantic Ocean.
Giovanni Arlan Torres, Rodrigo Silvestre Martins, Luciano Gomes Fischer, Luís Gustavo Cardoso, Rodrigo Sant'Ana, Bruno Mourato   +5 more
wiley   +1 more source

Intermediate filaments spatially organize intracellular nanostructures to produce the bright structural blue of ribbontail stingrays across ontogeny

Frontiers in Cell and Developmental Biology
In animals, pigments but also nanostructures determine skin coloration, and many shades are produced by combining both mechanisms. Recently, we discovered a new mechanism for blue coloration in the ribbontail stingray Taeniura lymma, a species with ...
Michael J. Blumer, Venkata A. Surapaneni, Jana Ciecierska-Holmes, Stefan Redl, Elisabeth J. Pechriggl, Frederik H. Mollen, Mason N. Dean, Mason N. Dean   +7 more
doaj   +1 more source

The reproductive cycle of the thorny skate (Amblyraid radiata) in the western Gulf of Maine [PDF]

, 2005
The thorny skate (Amblyraja radiata) is a large species of skate that is endemic to the waters of the western north Atlantic in the Gulf of Maine.
Danley, Patrick D., Elzey, Scott, Howell, William Huntting, Jurek, Joe, Kneebone, Jeff, Sulikowski, James A., Tsang, Paul C.W.   +6 more
core   +1 more source

Pigmentation disorders in three specimens of spiny dogfish, Squalus acanthias Linnaeus, 1758, from the Gulf of Venice, northern Adriatic Sea

Journal of Fish Biology, EarlyView.
Abstract This study reports three cases of pigmentation disorders in Squalus acanthias from the Gulf of Venice. Two specimens exhibited spotless phenotypes, whereas one exhibited hypermelanism. Morphological assessments were conducted for two individuals, alongside genetic analysis of mitochondrial genes to determine phylogeographic relationships. Both
Bernardi Jacopo, Finotto Licia, Catalano Giusy, Crobe Valentina, Cariani Alessia, Ferrari Alice   +5 more
wiley   +1 more source

Fatal Hemorrhagic Septicemia in Common Guitarfish (Rhinobatos rhinobatos) Caused by Photobacterium damselae Subsp. damselae in a Controlled Environment

Journal of Fish Diseases, EarlyView.
ABSTRACT Elasmobranchs, including sharks and rays, are commonly housed in public aquariums due to their ecological significance and educational value. The common guitarfish (Rhinobatos rhinobatos), currently listed as ‘Critically Endangered’ by the IUCN, is particularly susceptible to population declines due to overfishing and bycatch.
Giorgia Bignami, Teresa Pirollo, Perla Tedesco, Monica Caffara, Maria Letizia Fioravanti, Elena Campesi, Cristiano Da Rugna, Stefano Gridelli, Francesco Quaglio, Andrea Gustinelli   +9 more
wiley   +1 more source

Occurrence of the hemoparasite Cyrilia spp. in the Amazonian stingray Potamotrygon wallacei [PDF]

Anais da Academia Brasileira de Ciências
Freshwater stingrays play a crucial ecological role in the Amazon; however, studies on their parasitic fauna still need to be made available. This study aimed to investigate the occurrence of hemoparasites, specifically Cyrilia spp., in specimens of ...
ANA CLARA N. ALVES, LARISSA D. FONSECA, RAYANA M. PAIXÃO, ADRIANO T. OLIVEIRA   +3 more
doaj   +1 more source

The eyes of suckermouth armoured catfish (Loricariidae, subfamily Hypostomus): pupil response, lenticular longitudinal spherical aberration and retinal topography [PDF]

, 2002
The dilated, round pupils of a species of suckermouth armoured catfish (Liposarcus pardalis) constrict slowly on illumination (over 35-40 min) to form crescent-shaped apertures. Ray tracing of He-Ne laser beams shows that the lenses of a related species (
Collin, S. P., Corrigan, J., Douglas, R. H.   +2 more
core