9643 ‎(2)‎

• UCREFRP Catalog Number: 9643
• Author: Seener, J. W.
• Title: Inbreeding Depression and the Survival of Zoo Populations
• USFW Year: n.d.
• USFW - Doc Type: 209-217
• Copyright Material: YES

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TABLE 1. Summary of Frequency of Occurrence of Various Food Items in Stomachs of Fishes from the Lower Colorado River, 1974-76, as Percentages
of All Stomachs Examined for Each Species.
co
N

C v C 7 y C j C O? ? C
V
4 ` ` Z O ro .Q a ', ,,, H ro .V k .
O
0 O O
? q O ro ro ? T O O ? `? v? ? 0. ? 1
C ` O 'b

Items in stomachs >
r
Number of stomachs.... 38 49 135 79 137 16 23 42 52 27 189 16 51 47 34 29 100 65 21 C

Total lengths, limits in x
z
millimetres .............. 152- 37- 175- 33- 236- 93- 178- 21- 27- 118- 99- 82- 75- 78- 85- 173- 540- 95- 381-
440 193 864 56 737 325 813 37 64 432 560 155 205 213 305 327 893 289 495 M
Percentage empty.......... 18.4 0.0 7.8 11.4 16.1 12.5 39.1 Z.4 0.0 29.6 11,6 313 31.6 0.0 5.9 0.0 45.0 0.0 0.0 r
2
lnorganic Materials >
Sand, gravel, etc....... - 81.8 10.4 3.8 - - - 14 194 - 17 12,5 1.0 11 8.8 - - 200 951 z
Vegetative Materials
Detritus ...................... - 98.0 421 620 329 11.5 - - 1000 - - - -. - - - - 63.1 1000 D
Macrophytes .............. 16 - 1.5 - 40.9 188 - - - - - - - - - 41.4 - 44.6 4.8
Benthic and epiphytic
algae ........................ 42.1 16.3 3.7 1.5 8.0 - - 54.8 82,7 - - - - - 5.9 - - 1?7 14.3
Fhytoplankton............ - Ib.3 33.3 - 0.7 - - - - - - - - - - - - - 143
Animal Materials
Crustacea ................... 34.3 20.4 74 16.6 148 56.3 16. t - - 296 153 - 78 63.8 - 103 70 - -
Copepoda.............. 29.0 20.4 0.7 21.5 - - - - - - 10.6 - 7.8 51.1 - 6.9 - - -
Cladocera .............. 5.3 4.1 3.0 11.4 - - - - - - 4.8 - - 19.1 - 3.4 - - -
Ostracoda .............. - - 0.7 - - - - - - - 1.6 - 2.0 - - 3.4 - - -
Decapoda
Astacidae............ 5.3 - 3.7 - 21.2 56.3 26.1 - - 29.6 3.7 12.5 3.9 - - 6.9 7.0 - -
Paleomoneidae.. - - - - 3.7 - - - - - 8.5 6.2 7.8 - - 41.4 - - -

Benthic Insecta .......... 16.3 16.5 33.3 24.1 5.1 3.75 8.7 61.9 - 29.6 9.0 43.8 35.3 46.8 88
Ephemeroptera ...... - - 1.5 3.8 - - - - - 29.6 - - - - -
Odonata
ZYgoptera ......... - - - - - - - :.1 31,2 9.8
16.9 4.8
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