maximios

Devices that emit sounds of such high intensity that they cause pain or alarm in certain underwater species. The minimum sound level is approximately 200 dB re 1 _Pa @ 1m. References for AHDs primarily dealt with aquaculture operations. These devices may exclude some animals from important habitat (Olesiuk et al., 2002), and pose a […]

Although it is believed that the harbor porpoise population is not seriously in danger at present, incidental catch of the species in gillnets continues to be the primary threat throughout its range (Hammond et al 2008). Off the eastern coast of the US, an estimated 1200 to 2900 harbor porpoises were killed annually in gillnets […]

Facilitating a global exchange of information on bycatch and bycatch reduction Facilitating a global exchange of information on bycatch and bycatch reduction Bycatch is the principal and most immediate threat to many species and populations of marine mammals. In many parts of the world, especially in countries with large artisanal fishing sectors, the extent of […]

Research and development of bycatch reduction devices. See global map of acoustic deterrent studies Incidental capture of franciscana  The Consortium is testing whether ropes that have greater stiffness or fish under greater tension may be effective for reducing entanglements.  The stiffness or tension would reduce the ability of the rope to bend, allowing animals to […]

Submitted by twerner on June 17, 2016 – 14:35 On June 16, 2016, Massachusetts Secretary for the Office of Energy and Environmental Affairs, Matthew Beaton, announced a grant to NEAq researchers for developing and testing ropes of reduced breaking strength that are practical for fishing but can also help reduce whale entanglements. Here is the […]

Stone, G.S., Cavagnaro, L., Hutt, A., Kraus, S., Baldwin, K., Brown, J. Department of Conservation, New Zealand PO Box 10-420 Wellington, New Zealand White Dukane pingers with a fundamental frequency of 10kHz and harmonies of up to 160 kHz, elicited the strongest response from Hector’s dolphins, compared to the black Pice and red Dukane pingers. […]

Stone, G., Kraus, S., Hutt, A., Martin, S., Yoshinaga, A. & Joy, L. Marine Technology Society Journal Acoustic pingers were tested for their effectiveness to reduce entanglement of Hector’s dolphins in New Zealand gillnets. A remote control device was used to raise either active or passive acoustic pingers near Hector’s dolphins. The dolphins’ movement and […]

The small population of North Atlantic right whales is in danger of extinction. These whales were hunted nearly to extinction by commercial whalers by the end of the 1700s, but today are at risk from entanglement in fishing gear and boat strikes.    At least 82% of the North Atlantic right whale population has been entangled […]

Changing the property of fishing lines so that they are less likely to catch or ensnare animals feeding at the surface or in the mid-water column. They include low profile line, a kind of rope linking lobster pots that might be suspended deep enough to avoid whale entanglements but with enough floatation to lie above […]

The use of loud explosive devices, including gunshots, to scare non-target species such as sea lions away from a fishing operation. Deterrence may result from noise or tactile annoyance. Anecdotal evidence from some fishermen suggests this practice is widespread though its efficacy is not backed up by a number of studies, and it obviously threatens […]

Audio recordings of an animal in distress, or of its predator, played to deter individuals of that species from entering into a fishing area. Jefferson and Curry (1996) concluded that this technique was largely ineffective for reducing marine mammal interactions with fishing activity based on their review of multiple studies. Submitted by admin on November […]

Konigson, S., Lovgren, J., Hjelm, J., Ovegard, M., Ljunghager, F., Lunneryd, S. [email protected], [email protected] Experiments were conducted along the Swedish coast to investigate the impact of seal exclusion devices (SEDs) on seal bycatch. Pot entrances were fitted with SEDs of different shapes and sizes. The pots were a two-chambered single entrance floating cod pot. Pots […]

Partan, J. and K. Ball, 2016, Rope-less fishing technology development, Final grant report to the Consortium for Wildlife Bycatch Reduction under NOAA Award # NA10NMF4520343 to the New England Aquarium, Boston, USA , ps 109-152. Knowlton, A.R., Robbins, J., Landry, S., McKenna, H.A., Kraus, S.D. and T.B. Werner, 2016, Implications of fishing rope strength on […]

Aalbers, S.A., Stutzer, G.M. and Drawbridge, M.A., 2004, The effects of catch-and-release angling on the growth and survival of juvenile white seabass captured on offset circle and J-type hooks, North American Journal of Fisheries Management, v.24, ps 793-800. Afonso, A., Hazin, F., Carvalho, F., Pacheco, J., Hazin, H., Kerstetter, D., Murie, D., Burgess, G., 2011, […]