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Table 16. Summary of Hudson-Raritan Estuary spotted hake diet by sampling period during 1996-97, expressed as the percent frequency of occurrence of dominant prey or items (FO), and as the mean percent contribution of dominant prey or items to total stomach content volume (TV). (n = sample size; ES = percent of empty stomachs.)

Prey
Sampling Period
Jul 96
(n = 44;
ES = 0)
Oct 96
(n = 14;
ES = 7)
Jan 97
(n = 1;
ES = 0)
Apr 97
(n = 72;
ES = 0)
Aug 97
(n = 3;
ES = 33)
Nov 97
(n = 28;
ES = 0)
FO
TV
FO
TV
FO
TV
FO
TV
FO
TV
FO
TV
Crangon septemspinosa 95.5 60.9 85.7 42.4 100.0 33.3 76.4 47.1 66.7 38.9 89.3 31.3
Neomysis americana 15.9 5.9 14.3 4.1 100.0 33.3 33.3 8.9 100.0 40.7 7.1 0.3
Unidentified juvenile fish 0.0 0.0 7.1 13.5 0.0 0.0 5.6 5.0 33.3 20.4 50.0 17.2
Unidentified organic matter 6.8 0.4 0.0 0.0 0.0 0.0 13.9 5.4 0.0 0.0 3.6 <0.1
Gammarus lawrencianus 15.9 4.4 28.6 9.3 0.0 0.0 0.0 0.0 0.0 0.0 17.9 4.3
Pseudodiaptomus sp. 0.0 0.0 0.0 0.0 100.0 33.3 13.9 2.1 0.0 0.0 10.7 0.1
Unidentified juvenile flounder 2.3 0.5 0.0 0.0 0.0 0.0 1.4 4.1 0.0 0.0 17.9 4.2
Juvenile Anguilla rostrata 0.0 0.0 7.1 13.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Unidentified hydroids 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.9 9.5

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(Modified Jun. 13 2008)