Results 11 to 20 of about 7,925 (228)
Evidence of hook competition in longline surveys [PDF]
, 2008 Catch rates from surveys are used as indices of abundance for many fish species. Relative abundance estimates from surveys with longline gear do not usually account for possible effects of gear saturation, which potentially creates competition among fish for baited hooks and misrepresentations of abundance trends. We examined correlations between catch
Rodgveller, Cara J. +2 more
core +6 more sources
Vulnerability of the Oceanic Whitetip Shark to Pelagic Longline Fisheries. [PDF]
PLoS ONE, 2015 A combination of fisheries dependent and independent data was used to assess the vulnerability of the oceanic whitetip shark to pelagic longline fisheries.
Mariana Travassos Tolotti +4 more
doaj +7 more sources
Submersion of the system «anchor-tightrope» of longline
Известия ТИНРО, 2017 A hydrodynamic problem for the longline system «anchor-tightrope» in resting fluid is formulated and solved on base of the theory of dynamics for systems with variable mass.
Lyudmila A. Gabryuk, Viktor I. Gabryuk
doaj +3 more sources
Unequal sex ratios in longline catches
Journal of the Marine Biological Association of the United Kingdom, 2001 There is sometimes a significant bias in the sex ratio of fish caught by longline. Usually, more females than males are caught. The possible reasons for unequal sex ratios in longline catches are listed and discussed. One sex could be more common in the area where the fishery takes place because there really is an unequal sex ratio in the population or
P. Wirtz, T. Morato
openaire +2 more sources
Revealing the Global Longline Fleet with Satellite Radar
Scientific Reports, 2022 Because many vessels use the Automatic Identification System (AIS) to broadcast GPS positions, recent advances in satellite technology have enabled us to map global fishing activity. Understanding of human activity at sea, however, is limited because an unknown number of vessels do not broadcast AIS.
David Kroodsma +5 more
openaire +3 more sources
A Novel Longline That Can Be Used By a Single Crew in the Aegean Sea: Solo Longline
Çanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries, 2020 This short paper presents an innovation on the use of a bottom longline with only a single crew on a fishing boat in the Aegean Sea. The mainline was 0.80 mm in diameter and 75 m in length, with branch lines of 0.45 mm in diameter and 70 cm in length. Distance between two adjacent branch lines was 7 m.
Cezmi KANÇOBAN, Okan AKYOL
openaire +5 more sources
Threats of Longline Fishing to Global Albatross Diversity
Animals, 2022 Albatrosses are among the most threatened seabird species. Often entangled in gillnets or hooked while longline fishing gear is being set, albatrosses are affected by fishing. This is assumed to be especially true in cases where illegal longline fishing vessels are involved, as they are less likely to implement the bycatch mitigation measures ...
Gohar A. Petrossian +4 more
openaire +3 more sources
Hauling Speed of Tuna Longline-I
NIPPON SUISAN GAKKAISHI, 1971 The present report showed the outline of hauling speed and the influence of catch and accident on it observable in the records collected from the hauling work of the 10 strings of tuna longline about at 155°E near the Equator conducted by the Choho-maru (266 gross tons), And the results obtained were summarized as follows: 1.
Hiroshi MAÉDA +2 more
openaire +4 more sources
Acoustic estimation of longline tuna abundance [PDF]
ICES Journal of Marine Science, 2000 The French Polynesia Economic Exclusive Zone is located in an important longline fishing ground for albacore (Thunnus alalunga), yellowfin (T. albacares) and bigeye tuna (T. obesus). Longline tuna abundance estimates using commercial catches are particularly biased when hook depth does not coincide with the depths at which tuna prefer to swim. To avoid
/Bertrand, Arnaud, /Josse, Erwan
openaire +3 more sources
Frontiers in Marine Science, 2023 Longlining represents a cost-effective fishing modality for catching tuna, but its use is contentious due to the unintended catch of endangered, threatened, and protected (ETP) species.
Mauricio Castrejón, Omar Defeo
doaj +1 more source