Results 11 to 20 of about 1,683 (199)

Calibration of fish biomass estimates from gillnets: Step towards broader application of gillnet data

open access: yesEcological Indicators, 2023
Fish are an important component of aquatic ecosystems, thus representative and reliable assessments of their population variables are essential for a variety of ecological applications, management and conservation.
Milan Říha   +21 more
doaj   +3 more sources

Metabarcoding gillnets to assess unaccounted catch depredation or escape [PDF]

open access: yesEnvironmental DNA, 2022
Gillnets are the world's most common net‐based fishing gear, comprising walls of light mesh designed to entangle fish. Gillnets are often retrieved with holes in the netting, which means some animals escape or are depredated unseen, but with some ...
Mark deBruyn   +2 more
doaj   +6 more sources

Biomass and abundance biases in European standard gillnet sampling.

open access: yesPLoS ONE, 2015
The European Standard EN 14757 recommends gillnet mesh sizes that range from 5 to 55mm (knot-to-knot) for the standard monitoring of fish assemblages and suggests adding gillnets with larger mesh sizes if necessary.
Marek Šmejkal   +12 more
doaj   +4 more sources

The application of tie-down gillnet to improve the capture of blackfin flounder (Glyptocephalus stelleri) in a sustainable way

open access: yesFrontiers in Marine Science, 2023
In this study, experimental fishing trials were performed to quantitatively evaluate and compare the fishing performance of trammel nets, tie-down gillnets, and single gillnets used for catching blackfin flounder.
Seonghun Kim   +2 more
doaj   +1 more source

The Use of Gillnets for Estimation of Fish Stocks [PDF]

open access: yesJournal of Animal and Veterinary Advances, 2010
In this research it has been targeted to estimate fishable stocks of Karakaya Dam Lake (in Turkey) by using fishing with gillnets method that had been suggested as an alternative method for estimating fish stocks. Productivity per hectare in the dam lake and the amount of fishable stocks has been calculated to be 13.67 kg ha-1 and 312.005 kg year-1 ...
Yüksel, Fahrettin, Celayir, Yasin
openaire   +3 more sources

Assessment of the bycatch level for the Black Sea harbour porpoise in the light of new data on population abundance

open access: yesFrontiers in Marine Science, 2023
Incidental catch in fishing gear (often known as bycatch) is a major mortality factor for the Black Sea harbour porpoise (Phocoena phocoena relicta), an endemic subspecies listed as Endangered in the IUCN Red List.
Dimitar Popov   +21 more
doaj   +1 more source

A Review on Ray Capture According to Fishing Gear Worldwide

open access: yesJurnal Ilmiah Perikanan dan Kelautan, 2021
Highlight • Ray capture worldwide using variety fishing gear. • Efficiency of fishing gear used in capture ray species among countries. • The maturation size for female and male ray according to species present.
Nur Arina Hayati Mohidin   +4 more
doaj   +1 more source

Diet of the rasptail skate, Rostroraja velezi (Rajiformes: Rajidae), off Piura, Peru

open access: yesCiencias Marinas, 2021
Batoids are among the least studied group of vertebrates and one of the most vulnerable to fishing. The rasptail skate, Rostroraja velezi, is a bycatch species in northern Peru for which there are no studies on its diet.
Pamela Molina-Salgado   +2 more
doaj   +1 more source

Impact of turbot fishery on cetaceans in the Romanian Black Sea area

open access: yesScientia Marina, 2014
The abundance of the three species of endemic Black Sea marine mammals represented by Delphinus delphis ponticus (Barabasch-Nikiforov 1935), Tursiops truncatus ponticus (Barabasch-Nikiforov 1940) and Phocoena phocoena relicta (Abel 1905) has shown a ...
Gheorghe Radu, Eugen Anton
doaj   +1 more source

Experimental Mixed Gillnets Improve Catches of Narrow-Barred Spanish Mackerel (Scomberomorus commerson)

open access: yesFishes, 2023
A new gillnet made from multiple mesh sizes ranging from 125 to 180 mm of stretched mesh (experimental gillnet) was tested under commercial fishing conditions to compare the fishing performance with that of conventional gillnets with a 125 mm mesh ...
Luong Trong Nguyen   +2 more
doaj   +1 more source

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