Comparative quantification of juvenile croakers Pseudotolithus species incidentally killed in coastal artisanal shrimp beam trawl fisheries off Lagos Coast, Nigeria and management implications

2004 ◽  
Vol 19 (2) ◽  
Author(s):  
EE Ambrose
Keyword(s):  
Beam Trawl ◽  
Management Implications ◽  
Trawl Fisheries

scholarly journals Condition and survival of discards in tickler chain beam trawl fisheries

2020 ◽  
Author(s):  
Edward Schram ◽  
◽  
Pieke Molenaar ◽  
Raoul Kleppe ◽  
Adriaan Rijnsdorp ◽  
...  
Keyword(s):  
Beam Trawl ◽  
Trawl Fisheries

Fluctuations in abundance and Species composition of fishes collected by beam trawl Fisheries in Jindo, Korea

2019 ◽  
Vol 12 (1) ◽  
pp. 69-75
Author(s):  
Sun-Ik JANG ◽  
Sunh-Hoon LEE ◽  
Jin LEE ◽  
Kyeong-Ho HAN
Keyword(s):  
Species Composition ◽  
Beam Trawl ◽  
Trawl Fisheries

On the survival of plaice and sole discards in the otter-trawl and beam-trawl fisheries in the North Sea

1990 ◽  
Vol 26 (1) ◽  
pp. 151-160 ◽  
Author(s):  
F.A. Van Beek ◽  
P.I. Van Leeuwen ◽  
A.D. Rijnsdorp
Keyword(s):  
North Sea ◽  
Otter Trawl ◽  
Beam Trawl ◽  
The North ◽  
The North Sea ◽  
Trawl Fisheries

scholarly journals Mitigating ecosystem impacts of bottom trawl fisheries for North Sea sole Solea solea by replacing mechanical by electrical stimulation

2020 ◽  
Author(s):  
A.D. Rijnsdorp ◽  
J. Depestele ◽  
O.R. Eigaard ◽  
N.T. Hintzen ◽  
A. Ivanovic ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
North Sea ◽  
Bottom Trawl ◽  
Beam Trawl ◽  
Electrode Arrays ◽  
Impact Indicator ◽  
Total Allowable Catch ◽  
Trawl Fishery ◽  
The Impact ◽  
Trawl Fisheries

AbstractEcosystem effects of bottom trawl fisheries are a major concern. We analysed whether the replacement of mechanical stimulation by electrical stimulation may reduce the adverse impacts on the benthic ecosystem in the beam trawl fishery for sole. Although the use of electricity is not allowed to catch fish in European Union waters, a number of beam trawlers got derogation and switched to pulse trawling to explore the potential to reduce impacts. We extended a recently developed assessment framework and showed that the switch to pulse trawling substantially reduced benthic impacts when exploiting the Total Allowable Catch of sole in the North Sea. We applied the framework to Dutch beam trawl logbook data from 2009 to 2017 and estimated that the trawling footprint decreased by 23%; the precautionary impact indicator of the benthic community decreased by 39%; the impact on median longevity decreased by 20%; the impact on benthic biomass decreased by 61%; the amount of sediment mobilised decreased by 39%. The decrease is due to the replacement of tickler chains by electrode arrays, a lower towing speed and higher catch efficiency for sole. The effort and benthic impact of the beam trawl fishery targeting plaice Pleuronectes platessa in the central North Sea increased with the recovery of the plaice stock. This study illustrates the usefulness of a standardized methodological framework to assess the differences in time trends and trawling impact between gears.

Assessment of fish by-catch species from coastal artisanal shrimp beam trawl fisheries in Nigeria

2005 ◽  
Vol 71 (1) ◽  
pp. 125-132 ◽  
Author(s):  
Eyo E. Ambrose ◽  
B.B. Solarin ◽  
C.E. Isebor ◽  
A.B. Williams
Keyword(s):  
Beam Trawl ◽  
By Catch ◽  
Trawl Fisheries

scholarly journals Comparison of beam trawl catch, by-catch and discard in fishing and non-fishing areas – a case study from the northern Adriatic Sea

2021 ◽  
Vol 22 (1) ◽  
pp. 108
Author(s):  
DARIA EZGETA -BALIĆ ◽  
NEDO VRGOČ ◽  
IGOR ISAJLOVIĆ ◽  
DAMIR MEDVEŠEK ◽  
ANTE VUJEVIĆ ◽  
...  
Keyword(s):  
Adriatic Sea ◽  
Beam Trawl ◽  
Northern Adriatic Sea ◽  
Important Species ◽  
Northern Adriatic ◽  
Trawl Fishery ◽  
Trawl Catch ◽  
Commercially Important ◽  
By Catch ◽  
Trawl Fisheries

Beam trawl fishery is highly important in the Croatian part of the northern Adriatic wherein 116 vessels have a licence for this type of fishing gear. A sharp decrease in the beam trawl catch observed since 2015 has raised concern about not only socio-economic issues but also ecological issues and the effect that beam trawl fisheries have had on exploited stocks. Besides the effect that beam trawl fisheries can have on targeted economically important species, intensive dredging can cause long-term changes in the benthic community. Therefore, this study aimed to detect the effect that this type of fishing gear has on target and by-catch species. Furthermore, survey data were compared with the official beam trawl fishery data gathered through Vessel Monitoring System data together with fishermen’s logbooks. Our research targeted two adjacent areas: an area where beam trawl fishing is allowed and an area where it is forbidden. The results demonstrate that the commercially important catch represented a minor share of the total beam trawl catch in both survey areas, while discard made up more than 93% of the total catch. The main beam trawl commercially important species in the Croatian part of the northern Adriatic Sea was Pecten jacobaeus, followed by Solea solea and Ostrea edulis. Our results suggest that beam trawl fisheries mostly affect target bivalve species and some non-commercial benthic species (e.g. sponges). The differences recorded between areas could suggest that beam trawl fisheries cause changes mostly in the P. jacobaeus population.

scholarly journals Mitigating seafloor disturbance of bottom trawl fisheries for North Sea sole Solea solea by replacing mechanical with electrical stimulation

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0228528 ◽  
Author(s):  
A. D. Rijnsdorp ◽  
J. Depestele ◽  
O. R. Eigaard ◽  
N. T. Hintzen ◽  
A. Ivanovic ◽  
...  
Keyword(s):  
North Sea ◽  
Benthic Community ◽  
Bottom Trawl ◽  
Beam Trawl ◽  
Electrode Arrays ◽  
Physical Disturbance ◽  
Trawl Fishery ◽  
Solea Solea ◽  
The Impact ◽  
Trawl Fisheries

Ecosystem effects of bottom trawl fisheries are of major concern. Although it is prohibited to catch fish using electricity in European Union waters, a number of beam trawlers obtained a derogation and switched to pulse trawling to explore the potential to reduce impacts. Here we analyse whether using electrical rather than mechanical stimulation results in an overall reduction in physical disturbance of the seafloor in the beam-trawl fishery for sole Solea solea. We extend and apply a recently developed assessment framework to the Dutch beam-trawl fleet and show that the switch to pulse trawling substantially reduced benthic impacts when exploiting the total allowable catch of sole in the North Sea. Using Vessel Monitoring by Satellite and logbook data from 2009 to 2017, we estimate that the trawling footprint decreased by 23%, the precautionary impact indicator of the benthic community decreased by 39%, the impact on median longevity of the benthic community decreased by 20%, the impact on benthic biomass decreased by 61%, and the amount of sediment mobilised decreased by 39%. The decrease in impact is due to the replacement of tickler chains by electrode arrays, a lower towing speed and higher catch efficiency for sole. The effort and benthic physical disturbance of the beam-trawl fishery targeting plaice Pleuronectes platessa in the central North Sea increased with the recovery of the plaice stock. Our study illustrates the utility of a standardized methodological framework to assess the differences in time trends and physical disturbance between gears.

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