Believed to be the world's most endangered cetacean, the species Lipotes vexillifer, also known as the baiji, is a freshwater dolphin found only in the Yangtze River in China and is threatened by such factors as collisions with boats, pollution of water and by-catches
, they said.
They hunt a number of different species with 60 designated to snapper, and other by-catches
, and several designated for blue nose and hapuku.
The report said: "From all available evidence obtained it would appear that the majority of cetacean by-catches
in pelagic trawls are isolated incidents, when relatively large numbers can be captured.
This is an ecologically minded practice for it prevents over fishing and eliminates by-catches
Procured primarily for shrimp trawling, the Wartsila Vasa 8V12 marine diesel-powered boats are easily adapted to go after finfish exclusively, or to maximize fish landings from shrimp by-catches
Proposed by the Commission on 17 December 2013, the regulation obliges fishermen to land all catches - including by-catches
- that exceed quotas(1)a Given the institutional calendar, the EP and Council have three months to agree.
In spite of the improvements developed until now, the incidental catch of non-target species is one of the most worrying problems that shrimp fishing faces, it is particularly important in tropical areas where shrimp by-catches
are high and an important amount is discarded.
Purposeful fishing and by-catches
have decimated the largest predatory sharks, such as the bull, great white, dusky and hammerheads, allowing ray, skate and other small shark prey species to explode.
5 m long and weighing approximately 200 kg (Mead and Potter, 1990), therefore, could consume up to 12 kg of fish per day or the equivalent of 300 of the small whiting (40 g) or other similar-sized individuals of species that frequently appear in by-catches
of trawlers working throughout the geographic range of the NSW oceanic prawn-trawl fishery (Broadhurst and Kennelly, 1997).
Also, wahoo and mahi-mahi by-catches
from long-line vessels can be bought for about $2 a pound and promoted at retail for $3.
Investment is also supported to maintain and improve the quality of the catch (eg purchase of containers, catches for landing fish) and activities for the use of unwanted by-catches
Commissioner Maria Damanaki (fisheries) pointed out that funds are available to help fishermen adapt their nets to prevent these unwanted by-catches
The practice of reporting by-catches
and discards is becoming more routine for the fleet.
Cod and sole quotas are also being reduced, on account of high by-catches
of prohibited species like crab and halibut -- the former from 229,000 to 180,000 tons, the latter from 135,000 (yellowfin) and 90,000 (rock sole) to 130,000 and 60,000 tons.
may include fish, crustaceans, molluscs and echinoderms (such as starfish or sea urchins), species often rejected as having no commercial value or being too juvenile.