In some tropical shrimp-fishing grounds, turtles are relatively abundant and so may be captured incidentally and drown in the shrimp-trawls. Some countries have already taken action to mitigate the problem of turtle by-catch, and the use of the turtle-exclusion devices (TEDs) is for instance compulsory in tropical shrimp-fisheries in the USA as well as in other countries which wish to export shrimp to the USA but have problems with turtle by-catch. Australia has also introduced TEDs in some of its shrimp fisheries. In some cases the use of TEDs is reported to reduce the catch-rates both of shrimp and of.
