Results 21 to 30 of about 2,118 (215)

TRYPANOSOMA HUMBOLDTI EN SCHROEDERICHTHYS CHILENSIS (CHONDRICHTHYES, ELASMOBRANCHII, SCYLIORHINIDAE) COMO INDICADOR NO DESTRUCTIVO DE CONTAMINACION TRYPANOSOMA HUMBOLDTI IN SCHROEDERICHTHYS CHILENSIS (CHONDRICHTHYES, ELASMOBRANCHII, SCYLIORHINIDAE) AS NON DESTRUCTIVE INDICATOR OF CONTAMINATION

Gayana, 2005
La contaminación de las zonas costeras por la actividad humana es un problema que se ha incrementado en Chile, siendo caleta Lenga una de las zonas más contaminadas del país.
Víctor Silva, Ariel Valenzuela, Paulo Ruiz, Ciro Oyarzún   +3 more
doaj   +1 more source

Reallocation of the magnificent catshark Proscyllium magnificum Last & Vongpanich, 2004 to the genus Ctenacis Compagno, 1973 (Carcharhiniformes: Proscylliidae). [PDF]

J Fish Biol
Abstract The magnificent catshark Proscyllium magnificum was described in 2004 based off five specimens collected in the Andaman Sea off Myanmar. It was originally allocated to the genus Proscyllium, but recent molecular analyses suggested it was more closely related to the harlequin catshark Ctenacis fehlmanni from the western Indian Ocean. This study
White WT, O'Neill HL, Yang L, Naylor GJP.   +3 more
europepmc   +2 more sources

Insights Into the Ecomorphology of the Blue Shark (<i>Prionace glauca</i>) in the Adriatic Sea (Central Mediterranean Sea). [PDF]

Ecol Evol
This study examines how the morphology of Mediterranean blue sharks (Prionace glauca ) changes throughout their development. Using linear and geometric morphometrics, it reveals that juveniles and adults differ in fin and head shape, reflecting adaptations to different ecological and swimming demands.
Carbonara P, Bellodi A, Bottaro M, Deplano G, Mulas A, Neglia C, Niedermüller S, Prato G, Toomey L, Follesa MC.   +9 more
europepmc   +2 more sources

A tale of two seas: contrasting patterns of population structure in the small-spotted catshark across Europe [PDF]

Royal Society Open Science, 2014
Elasmobranchs represent important components of marine ecosystems, but they can be vulnerable to overexploitation. This has driven investigations into the population genetic structure of large-bodied pelagic sharks, but relatively little is known of ...
Chrysoula Gubili, David W. Sims, Ana Veríssimo, Paolo Domenici, Jim Ellis, Panagiotis Grigoriou, Andrew F. Johnson, Matthew McHugh, Francis Neat, Andrea Satta, Giuseppe Scarcella, Bárbara Serra-Pereira, Alen Soldo, Martin J. Genner, Andrew M. Griffiths   +14 more
doaj   +1 more source

Comparative Study of Semen Parameters and Hormone Profile in Small-Spotted Catshark (Scyliorhinus canicula): Aquarium-Housed vs. Wild-Captured

Animals, 2021
Several chondrichthyan species are threatened, and we must increase our knowledge of their reproductive biology in order to establish assisted reproductive protocols for ex situ or in situ endangered species.
Marta Muñoz-Baquero, Francisco Marco-Jiménez, Ximo García-Domínguez, José Luis Ros-Santaella, Eliana Pintus, María Jiménez-Movilla, Daniel García-Párraga, Francisco Alberto García-Vazquez   +7 more
doaj   +1 more source

Morphology of the unique egg cases of hornsharks (Heterodontiformes: Heterodontidae). [PDF]

J Fish Biol
Abstract Many of the egg cases of oviparous chondrichthyans remain unknown and undescribed in the literature. Egg cases can be a useful taxonomic character for species distinction and can be a valuable indicator of a species distribution in the field.
O'Neill HL, Tokunaga K, White WT.
europepmc   +2 more sources

Biología reproductiva y estados de desarrollo embrionario de la gata café Bythaelurus canescens (Chondrichthyes: Scyliorhinidae) del centro-norte de Chile

Revista de biologia marina y oceanografia, 2022
Bythaelurus canescens es un tiburón de profundidad capturado como fauna acompañante en la pesquería de crustáceos y la pesquería de la raya volantín Dipturus chilensis y el bacalao de profundidad Dissostichus eleginoides en la costa de Chile. El objetivo
Cecilia Gatica, Enzo Acuña
semanticscholar   +1 more source

Molecular Taxonomy of South Africa’s Catsharks: How Far Have We Come?

Diversity, 2023
The ability to correctly identify specimens at the species level is crucial for assessing and conserving biodiversity. Despite this, species-specific data are lacking for many of South Africa’s catsharks due to a high level of morphological stasis.
Michaela van Staden, David A. Ebert, Enrico Gennari, Rob W. Leslie, Meaghen E. McCord, Matthew Parkinson, Ralph G. A. Watson, Sabine Wintner, Charlene da Silva, Aletta E. Bester-van der Merwe   +9 more
doaj   +1 more source

Defining ecological roles of sharks on coral reefs. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT Sharks have often been perceived to play a critical role in the dynamics of coral reef ecosystems globally. Yet, there is relatively little evidence to support this idea across all but a limited set of species and contexts. Research on the roles and importance of reef sharks has been complicated by logistical challenges in collecting data on ...
Klinard NV, Mull CG, Heithaus MR, MacNeil MA.   +3 more
europepmc   +2 more sources

Environmental controls on the distribution of neoselachian sharks and rays within the British Bathonian (Middle Jurassic). [PDF]

, 2003
Extensive sampling from a range of facies within the Bathonian (Middle Jurassic) of southern England has allowed the palaeoenvironmental distribution of a number of taxa of neoselachian sharks and rays to be assessed.
Underwood, Charlie J.
core   +1 more source