Spring Food Habits of Corydalus Cornutus L. in the Brazos River, Texas Page: II
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Friday, Gary P., Spring Food Habits of Corydalus
cornutus L. in the Brazos River, Texas. Master of Arts
(Biology), August, 1971, 13 pp.> 4 tables, bibliography,
The objective of this study was to determine the
kinds and numbers of food organisms consumed by Corydalus
cornutus, and to investigate its periodicity of feeding
during the spring months in the Brazos River, Palo Pinto
County, Texas. A.total of 468 larvae were collected at
two-week intervals from February 29 to May 14, 1971.
Larvae were taken at opportunity during three periods
of the day, 6am.-12pm., 12pm.-6pm., and 6pm.-12am.
A total of 23 different food items was observed in the
121 stomachs containing food. An expedient method of
dissection of the digestive tract is included.
All food items were ingested whole. The diet of
the hellgrammite was exclusively insectivorous, and it
appeared to feed upon most other associated aquatic
insects in its environment, with the exception of Odonate
naiads, which were known to occur in the study riffle.
Trichoptera and Slmullum larvae were taken in largest
numbers. There appeared to be no expressive difference
in periodicity of feeding during the major light periods.
C.. cornutus is cannabalistic on a very limited basis
where an ample supply of food is available.
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Friday, Gary P. Spring Food Habits of Corydalus Cornutus L. in the Brazos River, Texas, thesis, August 1971; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc131411/m1/2/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; .