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Last modified
7/14/2009 5:01:44 PM
Creation date
5/20/2009 9:27:44 AM
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UCREFRP
UCREFRP Catalog Number
7131
Author
Danyulite, G. P. and Y. M. Maksimov
Title
Characteristics of the optomotor reaction of fishes acted upon by a pulsed electric field
USFW Year
1974
USFW - Doc Type
Journal of Ichthyology
Copyright Material
YES
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18 <br />Fish were consumed only by YOY Ptychocheilus at Strata A, C, D, E, and <br />F and Juvenile G. robusta at Stratum VI. For total strata the mean weight <br />for YOY Ptychocheilus was significantly larger than for G. robusta <br />(p = .0001 for raw and ranked data). Mean weightsfor fish were significantly <br />larger than zero at Strata A, C, D, and E. <br />Terrestrials <br />This category was a minor component of fish diets. Organisms were <br />associated with riparian vegetation and either fell from overhanging <br />vegetation or were blown into the water. Formicidae (ants) and occasional <br />small Arachnida (spiders) were the most numerous representatives. <br />On the basis of ranked mean weights, Juvenile G. robusta consumed <br />significantly more terrestrial invertebrates than other fish over all strata. <br />At Stratum A, YOY Ictalurus consumed more than other fish. <br />Invertebrate Remains <br />This encompassing category included all invertebrate fragments ranging <br />from legs, compound eyes, portions of the exoskeleton (thorax and abdomen), <br />to wings. Invertebrate remains, the dominant food item category, was <br />composed of 9 invertebrate subcategories (Figure 2). <br />Invertebrate remains were found in stomachs of all fish except YOY <br />N. stramineus, Adult Killifish, YOY C. discobolus, YOY C. latipinnis, and <br />Juvenile Ictalurus. Stomachs of Juvenile G. robusta contained significantly <br />more invertebrate remains than those of other fish over all strata. Stomachs <br />of Adult N. lutrensis contained significantly more invertebrate remains than <br />other fish at Stratum IV; and significantly more than all other fish except <br />YOY Ptychocheilus and YOY N. lutrensis at Stratum B on the basis of ranked <br />mean weights. At Strata V11, C, and D, stomachs of Juvenile G. robusta,
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