TM 161 Table 4

Home Table 4a. Summary of Hudson-Raritan Estuary windowpane 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
Prey	Jul 96 (n = 45; ES = 2.0)		Oct 96 (n = 59; ES = 13.5)		Jan 97 (n = 98; ES = 33.7)		Apr 97 (n = 163; ES = 23.3)		Aug 97 (n = 127; ES = 11.8)		Nov 97 (n = 78; ES = 10.3)
	FO	TV	FO	TV	FO	TV	FO	TV	FO	TV	FO	TV
Neomysis americana	93.3	57.1	81.4	39.0	33.7	19.7	42.9	31.6	85.0	70.1	60.3	17.8
Crangon	44.4	41.5	28.8	16.7	53.0	47.7	36.8	45.5	23.6	24.8	34.6	21.3
Gammarus lawrencianus	2.2	1.1	39.0	22.8	4.1	3.0	1.2	0.1	0.8	0.5	11.5	4.8
Unidentified organic matter	2.2	0.2	1.7	<0.1	0.0	0.0	15.3	1.9	2.4	1.6	5.1	1.1
Ampelisca abdita	0.0	0.0	3.4	2.9	1.0	0.9	3.7	1.6	0.8	0.1	9.0	7.1
Pseudodiaptomus coronatus	0.0	0.0	8.5	7.7	0.0	0.0	0.6	1.4	0.0	0.0	2.6	1.9
Unidentified juvenile fish	0.0	0.0	3.4	1.6	1.0	<0.1	1.2	2.5	0.0	0.0	10.3	3.7
Juvenile Anchoa sp.	0.0	0.0	0.0	0.0	0.0	0.0	2.5	5.0	0.0	0.0	12.8	7.9

Table 4b. Summary of Hudson-Raritan Estuary windowpane diet by predator size group 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 = number of nonempty stomachs included.)
Prey	Windowpane Size Group (cm TL)
	<9.9 (n = 126)		10.0 - 19.9 (n = 178)		20.0 - 29.9 (n = 229)		>30.0 (n = 24)
	FO	TV	FO	TV	FO	TV	FO	TV
Neomysis americana	100.0	91.1	88.2	61.6	65.9	38.5	58.3	23.2
Crangon septemspinosa	7.7	4.9	35.4	23.6	54.6	51.0	66.7	56.3
Gammarus sp.	0.0	0.0	11.8	1.5	7.4	2.4	8.3	1.6
Anchoa sp.	0.0	0.0	5.6	12.3	1.3	1.4	4.2	8.7
Detritus	7.7	1.8	1.7	<1.0	12.7	<1.0	0.0	0.0

Table 4c. Summary of Hudson-Raritan Estuary windowpane diet by sampling stratum during 1996-97, expressed as mean percent contribution of dominant prey or items to total stomach content volume. (n = number of nonempty stomachs included.)
Prey	Stratum
Prey	1 (n = 23)	2 (n = 24)	3 (n = 34)	4 (n = 18)	5 (n = 33)	6 (n = 25)	7 (n = 24)	8 (n = 16)	9 (n = 32)
Neomysis	49.5	17.3	35.7	30.8	14.3	72.2	82.6	32.5	23.4
Crangon	44.4	77.7	52.8	21.2	36.2	26.1	6.1	64.6	76.5

(Modified Jun. 13 2008)