Study of Alosa stock composition and year-class strength in Virginia: Annual Report 1984

This presentation is the annual report for P. L. 89-304, AFC 13-1 project Study of Alosa stock composition and year-class strength in Virginia, for the period 1 January 1984 to 31 December 1984. The fishes of concern were the alewife (Alosa pseudoharengus), American shad (A. sapidissima), and the blueback herring (A. aestivalis). The following jobs were performed: Evaluation of the Alosa Stocks and Fisheries in Virginia A Study of Juvenile Alosa Abundance Growth and Mortalit

Anadromous Fisheries Research Program, Virginia - Completion Report 1980-83

This presentation 1.s the completion report for P. L. 89-304, AFC 10 project Anadromous Fisheries Research, Virginia, for the period 1 October 1979 to 31 December 1983. The fishes of concern were the alewife (Alosa pseudoharengus), American shad (A. sapidissima), and the blueback herring (A. aestivalis). The Alosa species were once an important component of the landings of Virginia fisheries. In the last decade, however, there has been a dramatic decrease in American shad and river herring landings. The 1981 landings of Alusa species 1.n Virginia were the lowest ever recorded. American shad and river herring are also sought by recreational fishermen in Virginia; however, data are few and the extent of this activity is unknown. Additionally, these species have a vital ecological role. Young-of-the-year Alosa are the dominant pelagic prey species in their extensive freshwater and upper estuarine nursery grounds. After spawning, adults return to the sea and are prey of many marine piscivores. It is important that studies of the Alosa stocks in Virginia be continued. Current data, as well as historical data, are needed in order that analyses are constructive contributions to rational management strategies. The following jobs were performed: Catch and Effort Statistics of the Virginia Anadromous Fisheries Population Dynamics of the Virginia Alosa Fisheries Annual Index of Juvenile Alosa Abundanc

Biology and management of river herring and shad in Virginia : Completion report 1974-1976

This presentation is the final report for the 3-year segment 1974 to 1976 and is also the annual report for the contract period 1 October 1975 to 30 September 1976. It is the ninth report for the continuing VIMS investigations of river herring and shad in Chesapeake Bay. Previous 3-year completion reports were presented in 1970 and 1973

Anadromous Fisheries Research Program, Virginia - Annual Report 1982

This presentation is the third annual report for P. L. 89-304, AFC 10 project Anadromous Fisheries Research, Virginia, for the period 1 November 1981 to 31 October 1982. The fishes of concern were the alewife (Alosa pseudoharengus), American shad (A. sapidissima), and the blueback herring (A. aestivalis). The Alosa species were once an important component of the landings of Virginia fisheries. In the last decade, however, there has been a dramatic decrease in American shad and river herring landings. The 1981 landings of Alosa species in Virgin.ia were the lowest ever recorded. American shad and river herring are also sought by recreational fishermen in Virginia; however, data are few and the extent of this activity is. unknown. Additionally, these· species have a vital ecological role. Young-of-the-year Alosa are the dominant pelagic prey species in their extensive freshwater and upper estuarine nursery grounds. After spawning, adults return to the sea and are prey of many marine piscivores. It is important that studies of the Alosa stocks in Virginia be continued. Current data, as well as historical data, are needed in order that analyses are constructive contributions to rational management strategies. The following jobs were performed: Catch and Effort Statistics of the Virginia Anadromous Fisheries Population Dynamics of the Virginia Alosa Fisheries Annual Index of Juvenile Alosa Abundanc

A Mark-recapture study of striped bass in the James River, Virginia : Annual Report 1987

Internal anchor tags with external tubes were used to tag 1,986 striped bass in the James River in the Spring of 1987. The total number tagged was adjusted (at this time) to 823 because of observed and suspected tagging mortality. The available stock of striped bass in the Spring contained both young resident fish and mature nonresident fish which left the area of capture after spawning, presumably to migrate north in coastal waters. The exodus of the mature fish after spawning and the absence of a commercial fishery resulted in only 42 tag returns as of Spring 1988. This proportion (0.05) of returns is small relative to the proportion of returns in previous tagging programs in Chesapeake Bay when escapement was low due to high fishing pressures

A Mark-recapture study of striped bass in the Rappahannock River, Virginia Annual Report 1987-1988

Internal anchor tags with external tubes were used to tag 3, 319 striped bass in the Fall of 1987 and 2,024 in the Spring of 1988 in the Rappahannock River. The total number tagged was adjusted to 3,170 and 1,973 by removing from consideration all fish that were at large less than a week. The available stock of striped bass in the Spring contained both young resident fish and mature nonresident fish which left the area of capture after spawning, presumably to migrate north in coastal waters. The exodus of the mature fish after spawning was responsible, in part, for a low exploitation rate of 0.038. During the fall tagging a larger number of the striped bass tagged were the smaller resident fish which led to a higher exploitation rate of 0. 3

Study of Alosa stock composition and year-class strength in Virginia - Annual Report 1985

This presentation is the annual report for P. L. 89-304, AFC 13-2 project Study of Alosa stock composition and year-class strength in Virginia, for the period 15 February 1985 to 14 February 1986. The fishes of concern were the alewife (Alosa pseudoharengus), American shad (A. sapidissima), and the blueback herring (A. aestivalis)

Study of Alosa stock composition and year-class strength in Virginia - Completion Report 1984-1986

This presentation is the completion report for P. L. 89-304, AFC 13-1-3 project Study of Alosa stock composition and year-class strength in Virginia, for the period 1 January 1984 to 31 July 1986. The fishes of concern were the alewife (Alosa pseudoharengus), American shad (. sapidissima), and the blueback herring A. aestivalis)