PRISTAS and TRENT: CATCHES OF FISHES IN GILL NETS 



Spanish mackerel, Atlantic croaker, and striped 

 mullet (Table 2). When catches of each of these five 

 species were analyzed separately by time of day 

 and depth, those differences which were sig- 

 nificant showed greater catches again in the 

 monofilament webbing. These results for Spanish 

 mackerel are similar to those reported by Mihara 

 et al. (1971), who found monofilament webbing 

 more efficient than multifilament webbing on 

 Spanish mackerel. 



Significant differences between webbing 

 materials were not found for combined mean 

 catches of the remaining seven species, but were 

 found for catches of four of these species (sea 

 catfish, Atlantic sharpnose shark, gafftopsail 

 catfish, and pinfish) during the night at one or 

 more depths. Catches of sea catfish were sig- 

 nificantly greater in multifilament webbing at 

 middepth. Catches of Atlantic sharpnose sharks 

 were significantly greater in monofilament in the 



deep zone, and in multifilament in the mid zone. 

 Significantly more gafftopsail catfish were caught 

 in multifilament webbing in the mid zone as were 

 pinfish in multifilament webbing in the mid zone, 

 and in monofilament in the shallow zone. 



Comparisons Between Times of Day 



Combined (webbing types and depths) mean 

 catches of all 12 species were significantly greater 

 at night than during the day (Table 3). When 

 catches were analyzed separately by webbing 

 materials and depths, the significant differences 

 again revealed that more fish of each species were 

 caught at night. 



Comparisons Between Depth Zones 



Catches of 10 of the 12 species were significantly 

 different among depths (Table 4). Of the ten, Gulf 



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