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Table 6. Summary of Hudson-Raritan Estuary little skate 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 = 10;
ES = 0)
Oct 96
(n = 33;
ES = 0)
Jan 97
(n = 85;
ES = 0)
Apr 97
(n = 116;
ES = 0.8)
Aug 97
(n = 0;
ES = N/A)
Nov 97
(n = 88;
ES = 1.1)
FO
TV
FO
TV
FO
TV
FO
TV
FO
TV
FO
TV
Crangon septemspinosa 92.9 90.1 81.7 29.9 85.9 36.2 87.9 31.2 - - 77.2 20.3
Juvenile Atlantic rock crab 7.1 4.7 24.2 9.0 75.3 38.1 44.0 19.9 - - 35.2 9.7
Juvenile Ovalipes ocellatus 7.1 1.4 36.4 15.6 1.2 0.2 1.7 0.7 - - 25.0 6.4
Unidentified organic matter 14.3 2.6 24.2 7.3 2.4 0.5 3.4 1.0 - - 6.8 1.1
Ensis directus 0.0 0.0 3.0 1.8 2.4 0.6 17.2 6.1 - - 18.2 3.8
Neomysis americana 7.1 1.2 6.1 0.6 15.3 2.4 28.5 9.3 - - 13.6 2.8
Unidentified juvenile flounder 0.0 0.0 6.1 1.9 3.5 0.7 0.9 0.6 - - 13.6 5.4
Juvenile blue crab 0.0 0.0 0.0 0.0 0.0 0.0 4.3 1.4 - - 28.4 8.8
Pagurus sp. 0.0 0.0 6.1 0.7 1.2 0.4 5.2 1.6 - - 18.1 5.9
Atlantic surfclam 0.0 0.0 6.1 9.5 0.0 0.0 4.3 1.6 - - 3.4 0.5
Gammarus lawrencianus 0.0 0.0 6.1 6.0 2.4 0.4 0.0 0.0 - - 6.8 1.1

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(Modified Jun. 13 2008)