Shrimp Population Densities Within Mobile Bay

Brown shrimp and white shrimp populations available to the shrimp trawl in Mobile Bay were estimated on a monthly basis by two methods: one using existing commercial statistics and the other using experimental trawling. These methods produced similar estimates for brown shrimp whose peak standing crop in Mobile Bay occurred in June-July and was estimated at 200,000-300,000 pounds. Commercial landings peaked in July at about 342,000 pounds and were higher than the standing crop, indicating an extremely fast growth rate. White shrimp data were variable, with commercial statistics indicating a crop in Mobile Bay of about 100,000 pounds from September to November and with experimental trawl data indicating a peak of 267,000 pounds in August. Average monthly harvests approached 100,000 pounds from August to October. Abundance of pink shrimp was erratic and commercial shrimp statistics indicate variation from 475 pounds landed in 1956 to 34,000 pounds landed in 1957

Penaeid Shrimp Distributions in Mobile Bay, Alabama, Including Low-Salinity Records

Low-salinity records in the Gulf of Mexico area for taking Penaeus duorarum in water of 0.7‰ and 28°C, and Penaeus aztecus in water of 0.2‰ and 29.5°C were established in Mobile Bay, Alabama. Catches in Mobile Bay of approximately 20,000 each of P. aztecus and Penaeus setiferus, distributed over a 30-month period, show that P. aztecus taken in the hotter months had a wider salinity preference (5 to 30‰) than those taken in the cooler months (10 to 15‰). During the warmer months P. setiferus was most common in waters below 5‰ and during the winter months was almost equally distributed in the various salinities. Few P. duorarum were taken during the survey

Shrimp Population Densities Within Mobile Bay

Brown shrimp and white shrimp populations available to the shrimp trawl in Mobile Bay were estimated on a monthly basis by two methods: one using existing commercial statistics and the other using experimental trawling. These methods produced similar estimates for brown shrimp whose peak standing crop in Mobile Bay occurred in June-July and was estimated at 200,000-300,000 pounds. Commercial landings peaked in July at about 342,000 pounds and were higher than the standing crop, indicating an extremely fast growth rate. White shrimp data were variable, with commercial statistics indicating a crop in Mobile Bay of about 100,000 pounds from September to November and with experimental trawl data indicating a peak of 267,000 pounds in August. Average monthly harvests approached 100,000 pounds from August to October. Abundance of pink shrimp was erratic and commercial shrimp statistics indicate variation from 475 pounds landed in 1956 to 34,000 pounds landed in 1957

Multivariate analysis of meristic characters of juvenile Alosa : Completion report 1985

The objective was to determine if meristic studies supported a premise of river-specific stocks of American shad (Alosa sapidissima), alewife (A. pseudoharenqus) and blueback herring (A. aestivalis) in Chesapeake Bay. Information gathered from this study will add to the general body of data gathered for the implementation of management plans for each species

The Assessment of Commercial Fishing Effort in Virginia Annual Report 1989

This report summarizes an assessment of commercial fishing effort in the Chesapeake Bay and its Virginia tributaries during the period 1 October 1988 through 30 June 1989. Objectives of the study were: 1) to assess pound net fishing effort in Chesapeake Bay, in the James, York, Rappahannock, and Potomac rivers, and the Virginia tributaries to the Potomac River; and 2) to assess stake, anchor and drift gill net fishing effort in the James, York and Rappahannock rivers. The study period began on 1 October 1988 and ended on 30 June 1989. Data for fyke net, haul seine and mullet net fisheries, when available, have also been included