Discarded bycatch survival can impact the species populations?

Brazilian Journal of Oceanography  
Discarded bycatch survival can impact the species populations? Survival experiments conducted with damaged individuals of released bycatch showed that the fish species Dicologlossa cuneata exhibited the lowest mortality after 48h (54%), followed by the crab Polybius henslowii (65%) and the fish Trachinus vipera (81%). Despite the magnitude of the percentage mortalities determined, the average number of individuals estimated to die during a 15 minutes tow (standard commercial fishing time) was
more » ... fishing time) was relatively small: 1.2, 3.24 and 11 for D. cuneata, T.vipera and P. henslowii, respectively. Nevertheless, when these figures are extrapolated to cover all the dredging fleet the impact of this practice on the populations of the species studied can be significant, particulary for D. cuneata.
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