Stock Assessment of Connecticut River Shad: Examination of Fishing and Predation Effects on the Recent Stock Decline


Year ATH Landings Subsample Shad in Catch Fraction Total Coast Shad Shad CT River



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Year ATH Landings Subsample Shad in Catch Fraction Total Coast Shad Shad CT River

1981 143,502 - - 0.002 67 6.7


1982 71,260 - - 0.002 33 3.3
1983 51,265 - - 0.002 24 2.4
1984 74,030 - - 0.002 34 3.4
1985 57,129 - - 0.002 27 2.7
1986 70,540 - - 0.002 33 3.3
1987 86,952 - - 0.002 40 4.0
1988 90,396 - - 0.002 42 4.2
1989 89,761 160,209 56 0.0003 7 0.7
1990 113,854 225,682 74 0.0003 8 0.8
1991 107,547 807,248 382 0.0005 11 1.1
1992 122,998 887,273 892 0.001 27 2.7
1993 109,679 425,592 1,114 0.003 64 6.4
1994 100,989 133,388 114 0.001 24 2.4
1995 152,014 164,965 267 0.002 55 5.5
1996 195,554 637,762 1,157 0.002 79 7.9
1997 210,305 546,961 919 0.002 79 7.9
1998 180,612 111,601 2,442 0.02 880 88.0
1999 175,005 75,289 0 0 0 0
2000 155,829 766,321 0 0 0 0
2001 208,964 1,343,279 510 0.0004 18 1.8
2002 135,775 2,018,652 1,085 0.0005 16 1.6
2003 211,800 447,639 123 0.0003 13 1.3
2004 188,347 2,518,596 822 0.0003 14 1.4
2005 188,347 9,810,557 11,364 0.001 48 4.8





Figure1. Relationship between shad run size and juvenile indices from 1966-2005.







Figure 2. Relationship between shad run size and total inriver commercial and recreational landings (n*1,000).








Figure 3. Stacked plot showing contribution of inriver commercial landings (SHADCOM), inriver recreational landings (SHADREC), ocean recreational landings (SHADOR), ocean commercial intercept landings (SHADCC) and ocean discards (SHADDIS) of Connecticut River shad. Landings and dicards are all expressed as numbers of shad.



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