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Miscellaneous Report
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Selectivity of Gill Nets on Spanish Mackerel, Scomberomorus Maculatus, King Mackerel, S. Cavalla, and Bluefish, Pomatomus Saltatrix
Information from experimental settings of gill nets reported in the literature and data taken from commercial fishermen in Florida from 1973 to 1981 were used to analyze gill net selection on Spanish mackerel, Scomberomorus maculatus, king mackerel, S. cavalla, and bluefish, Pomatomus saltatrix from Florida and Serra Spanish-mackerel, S. braziliensis, from Brazil. The information on Spanish mackerel and bluefish obtained from the commercial gillnet fishedes did not further our understanding of selectivity over that produced by experimental nettings except in defining girth-length relations. The commercial fisheries data appeared to reflect mostly the sizes of fish that were abundant at the t...
Food of Gag (Mycteroperca Microlepis) from North Carolina and Three Areas of Florida
Stomachs of 2,377 gag caught by hook aM line from April 1979 through October 1981 from Nortb Carolina, south Florida, west central Florida, and northwest Florida were examined. Data were analyzed for variations between area, size of fish, and season by using percentage volume and percentage frequency. of occurrence. About 59% of the stomachs were empty. The percent volume of fish ranged from 95.1% in northwest Florida to 99.8% in south Florida. Twenty-five families of fish were represented in the diet. Six families were oominant: Clupeidae, Sparidae, Carangidae, Sciaenidae, Mugilidae, and Haemulidae. The dominant fish species were Sardinella aurita, Iagodon rhomboides, and Decqpterus punctatus. Invertebrates never exceeded 5% of the total volume or 12% in occurrence in any area. Relatively minor differences in diet among size classes and among seasons were noted; however, between areas the diet varied considerably.
Species Profile of Round Scad Decapterus Punctatus (Cuvier 1829)
"Members of the genus Decapterus usually occur in schools and are distributed throughout the world in tropical and subtropical waters. Decapterus is found generally in inshore waters, although larvae and young may occur in oceanic waters (Berry 1968). Fishes of this genus are important both for human consumption and for bait. In the Philippines, the round scad (Decaplerus spp.) is the largest commercial fishery, reaching over 100,000 tons per year (Ronquillo 1970). The increasing demand for protein for humans has put additional pressure on fish species not formerly exploited to the fullest. This species profile will attempt to bring together information on aspects of Decapterus pmctatus so future management and research plans can be developed. Emphasis will be centered on the species in the Gulf of Mexico"--Introduction
Food of Bluefish (Pomatomus Saltatrix) from the U.S. South Atlantic and Gulf of Mexico
Stomachs of 4,841 bluefish were collected from five areas in the Gulf of Mexico and U.S. south Atlantic. Bluefish were primarily piscivorous with Sciaenidae, Clupeidae, Carangidae, and Mugilidae as important components among food fish. Bluefish most frequently consumed species that were normally schooling coastal pelagic fish and supplemented this diet with shrimp, squid, and crabs. Stomach contents varied by area, size of predator, and season of capture. local abundance and availability of prey items seemed to be the controlling factor in prey secection.
