Results 91 to 100 of about 21,186 (271)

Period of the day drives distinctions in the taxonomic and functional structures of reef fish assemblages

Journal of Fish Biology, EarlyView.
Abstract Circadian processes are key drivers of animal behaviour, influencing patterns of activity, resource partitioning and competition avoidance. Studies evaluating circadian changes on the structure of marine assemblages are lacking, especially for reef fish.
Marcos B. Lucena, Thiago C. Mendes, Cesar A. M. M. Cordeiro, Carlos E. L. Ferreira   +3 more
wiley   +1 more source

An Integrated Approach to Determining the Risk of Overexploitation for Data-Poor Pelagic Atlantic Sharks [PDF]

, 2008
Assesses the risk of over-exploitation of sharks in Atlantic longline fisheries using three metrics based on multivariate statistics as a way to make management recommendations for species with limited data.

core  

Community science datasets identify the spatial occurrence and hotspots of flapper skate (Dipturus intermedius)

Journal of Fish Biology, EarlyView.
Abstract The flapper skate, Dipturus intermedius (Parnell, 1837), is a large‐bodied, slow‐growing and late‐maturing, Critically Endangered elasmobranch with a constrained population distribution. Here, we use two longitudinal community science datasets to investigate the occurrence of flapper skates in Irish waters. The two datasets are as follows: the
Danielle L. Orrell, Ciara Wögerbauer, Shane O'Reilly, Thomas K. Doyle, William Roche   +4 more
wiley   +1 more source

Specific setup and methodology for computer-assisted sperm analysis (CASA) in evaluating elasmobranch sperm

Theriogenology Wild
1. One-third of elasmobranch species are threatened with extinction, and the precise assessment of their sperm parameters and quality is one stage in the development of reproductive technology for animal conservation. 2. Computer-Assisted Sperm Analysis (
Pedro Nacib Jorge-Neto, Fabio de Moraes Francisco, Mario Davi Dias Carneiro, Sergio Ricardo Brito Santos, Letícia Alecho Requena, Sofia Dressel Ramos, Matheus Felix de Goés, Rafael Franco Valle, Fabiana Lucia André Padilha, Helen Colbachini, Rafael Caprioli Gutierrez, Larissa Schneider Brandão Souza, Verônica Takatsuka Manoel, Laura Chrispim Reisfeld, Thyara Deco-Souza, Roberta Ferreira Leite, Cristiane Schilbach Pizzutto   +16 more
doaj   +1 more source

El sistema reproductor femenino de Zearaja chilensis (Guichenot, 1848) (Chondrichthyes, Rajidae): Gametogénesis y validación microscópica de los criterios de madurez [PDF]

, 2015
Los condrictios son extremadamente susceptibles a la explotación pesquera debido, entre otras cosas, a sus adaptaciones reproductivas. Los conocimientos básicos de sus parámetros reproductivos son esenciales, ya sea desde el punto de vista ecológico como
Di Giacomo, Edgardo Ernesto, Galíndez, Elena Juana, Wehitt, Anahi   +2 more
core   +1 more source

Proteomic analysis of the zone of degeneration at the mitosis–meiosis transition stage in wild‐caught male catshark (Scyliorhinus canicula), correlated with an unusually high‐water temperature in the English Channel

Journal of Fish Biology, EarlyView.
Abstract In the context of current global change, variations in water temperature are one of the environmental conditions with serious consequences for marine life, including reproductive processes. In the small spotted catshark Scyliorhinus canicula, spermatogenesis occurs in spermatocysts composed of synchronously developing germ cells associated ...
Fabian Jeanne, Stanislas Pilet, Sean Heighton, Benoît Bernay, Pascal Sourdaine   +4 more
wiley   +1 more source

Fishing profile and commercial landings of shark and batoids in a global elasmobranchs conservation hotspot [PDF]

Anais da Academia Brasileira de Ciências
This paper describes the fishing profile and the temporal variation in the commercial landings of elasmobranchs in a global hotspot for their conservation and investigates the variables that influenced the landings. Census data on commercial catches were
ÍTALO LUTZ, PAULO EMÍLIO SANTOS, RODRIGO CAMPOS, CLAUDIA ANTÔNIA C.R. DE OLIVEIRA, NATASCHA WOSNICK, GRAZIELLE EVANGELISTA-GOMES, MIGUEL PETRERE JR, BIANCA BENTES   +7 more
doaj   +1 more source

Repeatability of baited remote underwater video station (BRUVS) results within and between seasons.

PLoS ONE, 2020
Baited remote underwater video stations (BRUVS) are increasingly being used to evaluate and monitor reef communities. Many BRUVS studies compare multiple sites sampled at single time points that may differ from the sampling time of another site. As BRUVS
C Samantha Sherman, Michelle R Heupel, Mohini Johnson, Muslimin Kaimuddin, L M Sjamsul Qamar, Andrew Chin, Colin A Simpfendorfer   +6 more
doaj   +1 more source

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

Who's My Daddy? Considerations for the influence of sexual selection on multiple paternity in elasmobranch mating systems

Ecology and Evolution, 2017
Polyandry resulting in multiply‐sired litters has been documented in the majority of elasmobranch species examined to date. Although commonly observed, reasons for this mating system remain relatively obscure, especially in batoids.
Kady Lyons, C. Chabot, C. Mull, Corinne N Paterson Holder, C. Lowe   +4 more
semanticscholar   +1 more source