1.   And motorboat propellers and the nets and hooks of commercial fishers have killed many turtles.

2.   Commercial fishers also have no way of excluding from their kill the large, fecund female fish that are critical to producing an adequate number of juveniles.

3.   Instead, they become the incidental victims of commercial fishers, including those for bluefin tuna and Antarctic sea bass.

4.   Government subsidies favor commercial fishers over small-scale, traditional ones.