By-Catch of Grey Seals in Fish Traps in the German Baltic Sea—From Incidents to Mitigation and Fisheries Regulation
This paper reports on an unusual mortality event (UME) of healthy, nourished, male Baltic grey seals (Halichoerus grypus grypus
Unanswered Forum Topics
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By-Catch of Grey Seals in Fish Traps in the German Baltic Sea—From Incidents to Mitigation and Fisheries Regulation
This paper reports on an unusual mortality event (UME) of healthy, nourished, male Baltic grey seals (Halichoerus grypus grypus
By-Catch of Grey Seals in Fish Traps in the German Baltic Sea—From Incidents to Mitigation and Fisheries Regulation
This paper reports on an unusual mortality event (UME) of healthy, nourished, male Baltic grey seals (Halichoerus grypus grypus
ICES/FAO Working Group on Fishing Technology and Fish Behaviour (WGFTFB25)
Date
For more information about this 5=day meeting please see: See: https://wgftfb.org/annual-meeting/
Support for reducing finning and bycatch of sharks
Promotion of shark conservation efforts extending into the Indian Ocean with support by the Indian Ocean Tuna Commission.
See: https://iotc.org/sites/default/files/documents/compliance/cmm/iotc_cmm_2508.pdf
Influence of knot strength on the mechanical performance of a biodegradable gillnet
Study Type
Study in the lab
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
First estimates of entanglement rate of humpback whales Megaptera novaeangliae observed in coastal Icelandic waters
This study used systemic scar analysis to estimate the frequency of non-lethal entanglements among humpback whales off the coast of Iceland from 2005-2017. Results demonstrate that at least 24.8% of individuals had prior entanglement(s) when first encountered, and then subsequently acquired new entanglement-related injuries at an averafe rate of 1.9% per year; however, scar-based estimates usually underestimate the frequency of prior entanglements. At least some entanglements seem to have occurred locally.
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
Study Type
Field study in the wild
Location
Skjálfandi Bay and Eyjafjörður, Iceland
Target catch
none
Effect on bycatch species
swimming speed increased, surface feeding decreased
Effect on target catch
n/a
Bycatch species
Reduction technique
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
Study Type
Field study in the wild
Location
Skjálfandi Bay and Eyjafjörður, Iceland
Target catch
none
Effect on bycatch species
swimming speed increased, surface feeding decreased
Effect on target catch
n/a
Bycatch species
Reduction technique
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Reduction technique
Fishing Gear
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Reduction technique
Fishing Gear
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Reduction technique
Fishing Gear
Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland
The authors conducted field studies off the coast of Iceland to measure the response of humpback whales (Megaptera noveangliae) in their feeding grounds to a whale pinger and seal scarer (acoustic deterrents). Results indicate that whale pingers caused a significant increase in humpback swimming speed and a significant decrease in surface feeding, and that seal scarers caused no significant, consistent behavioral changes.