Results 1 to 10 of about 26,050 (208)

Adaptive loss of shortwave-sensitive opsins during cartilaginous fish evolution [PDF]

open access: yesNature Communications
Cartilaginous fishes (e.g., sharks, rays, and skates) cannot see blue or violet light, potentially because they lack the shortwave-sensitive cone opsin gene (sws).
Bo Zhang   +13 more
doaj   +2 more sources

Release of unwanted flat-bodied fish from a horizontal-bar grid system as revealed through comparative fishing trials and underwater video observations

open access: yesAquaculture and Fisheries, 2021
Grid systems separate fish species primarily through physical means: fish size and body shape. On Georges Bank off the northeast USA, many species of flounders are overfished, and their catch needs to be reduced.
Christopher B. Rillahan, Pingguo He
doaj   +1 more source

Trends in the abundance of Celtic Sea demersal fish: Identifying the relative importance of fishing and environmental drivers

open access: yesFrontiers in Marine Science, 2022
The Celtic Sea is a productive fishing ground, therefore identifying the relative importance of fishing and environmental factors on fish stock dynamics is crucial for developing our understanding of sustainable yields and to operationalize Ecosystem ...
Jed Kempf   +4 more
doaj   +1 more source

Biogeographic patterns in the cartilaginous fauna (Pisces: Elasmobranchii and Holocephali) in the southeast Pacific Ocean [PDF]

open access: yesPeerJ, 2014
The abundance and species richness of the cartilaginous fish community of the continental shelf and slope off central Chile is described, based on fishery-independent trawl tows made in 2006 and 2007. A total of 194,705 specimens comprising 20 species (9
Carlos Bustamante   +2 more
doaj   +2 more sources

Revealing less derived nature of cartilaginous fish genomes with their evolutionary time scale inferred with nuclear genes. [PDF]

open access: yesPLoS ONE, 2013
Cartilaginous fishes, divided into Holocephali (chimaeras) and Elasmoblanchii (sharks, rays and skates), occupy a key phylogenetic position among extant vertebrates in reconstructing their evolutionary processes. Their accurate evolutionary time scale is
Adina J Renz   +2 more
doaj   +1 more source

Biological Knowledge of Thornback Ray (Raja clavata) from the Azores: Improving Scientific Information for the Effectiveness of Species-Specific Management Measures

open access: yesBiology, 2021
Elasmobranchs are globally recognized as vulnerable due to their life-history characteristics, fishing pressure, and habitat degradation. Among the skates and rays caught by commercial fisheries, the thornback ray Raja clavata is one of the most ...
Régis Santos   +4 more
doaj   +1 more source

Remarkable diversity of vomeronasal type 2 receptor (OlfC) genes of basal ray-finned fish and its evolutionary trajectory in jawed vertebrates

open access: yesScientific Reports, 2022
The vomeronasal type 2 receptor (V2R, also called OlfC) multigene family is found in a broad range of jawed vertebrates from cartilaginous fish to tetrapods.
Zicong Zhang   +3 more
doaj   +1 more source

Multi-Model Approach on Growth Estimation and Association With Life History Trait for Elasmobranchs

open access: yesFrontiers in Marine Science, 2021
Age and growth information is essential for stock assessment of fish, and growth model selection may influence the accuracy of stock assessment and subsequent fishery management decision making.
Kwang-Ming Liu   +8 more
doaj   +1 more source

DNA barcode reveals the illegal trade of rays commercialized in fishmongers in Brazil

open access: yesForensic Science International: Synergy, 2020
Sequences of the mitochondrial gene COI (DNA Barcode) were used to identify species of rays and skates commercialized in fishmongers in Brazil. The comparisons of the obtained sequences with previously published data available in NCBI and BOLD showed ...
Raul B. Camacho-Oliveira   +6 more
doaj   +1 more source

Assessing the Fishing Impact on the Marine Ecosystem of Guishan Island in the Northeastern Waters of Taiwan Using Ecopath and Ecosim

open access: yesJournal of Marine Science and Engineering, 2023
The northeastern waters of Guishan Island constitute one of the crucial fishing grounds for coastal trawl fishery in Taiwan and have been exploited for many decades.
Chien-Pang Chin   +2 more
doaj   +1 more source

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