| Relative abundance and size distributions of Penaeus shrimps based on samples collected during the 1983 SEAMAP-Texas Closure survey in the north and northwestern Gulf of Mexico - :5638 | National Marine Fisheries Service (NMFS)
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Relative abundance and size distributions of Penaeus shrimps based on samples collected during the 1983 SEAMAP-Texas Closure survey in the north and northwestern Gulf of Mexico
  • Published Date:
    1984
Filetype[PDF-1.86 MB]


Details:
  • Corporate Authors:
    Southeast Fisheries Center (U.S.), Galveston Laboratory. ; Southeast Fisheries Center (U.S.) ;
  • Description:
    During May, June and half of July 1983, 283 sites were sampled for the SEAMAP-Texas Closure survey. Relative abundance of Penaeus spp. was measured by catch per unit effort which was standardized to lbs/40-ft net/30-min drag. CPUEs averaged 7.4 lbs in the Texas region, 1.1 lbs in the Louisiana region, 1.8 lbs in the Mississippi-Alabama region, and 0.3 lbs in the Florida region. Highest CPUEs for each statistical subarea were usually found between 10 and 20 fathoms. CPUEs were also highest in the southern statistical subareas, 20 and 21, off Texas. Mean lengths and length-frequency histograms showed the new-year-class strength in 1983 was about the same as that in 1982, and considerably weaker than that of 1,981. Standing stocks for the area between 5 and 25 fm off Texas during the closures for 1981-1983 were 12.45, 9.4, and 6.1 million pounds, respectively, and were 555, 330, and 322 million shrimp, respectively.

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