For individual species, comparison of the effect of use and non-use of a salt-box on M, and on initial and final survival variables could only be determined for Atlantic croaker.
By examining Spearman correlation coefficients that were significantly greater than 0, we found a relationship between the three measurements and factors other than use or non-use of a salt-box (Table 7).
For the dependent variable, Atlantic croaker final survival, the use or non-use of a salt-box explained 38% of the variation explained by the model and catch separation time explained an additional 11%.
([+ or -] 7.2[salinity]), and salt-box salinity 66[salinity] ([+ or -] 8[salinity]).
All three measurements of the effect of salt-box use on bycatch were associated with the frequency of occurrence of some species in the bycatch.
Use of a salt-box to separate bycatch, as practiced by Texas shrimpers, had little or no effect on short-term survival of bycatch.
The use of a salt-box had little impact on bycatch M, and initial or final survival.