peak occurrences of bottom fauna. A seasonal peak occurrence of larval 

 Chironomidae occurred each summer, followed by an early fall buildup 

 of the same group. Stomach samples of channel catfish in the summer 

 and winter indicated a good utilization of Chironomidae larvae. 



Annual standing crop values of fish in Lac Des Allemands revealed 

 a high poundage of channel catfish (three-year mean of 87 pounds per 

 acre). Collections of fish in the Sabine River indicate species 

 of Centrarchidae and Cyprinidae were common in this drainage, with 

 no major changes in fish populations from that reported by earlier 

 investigators. (H.D.) 



Keywords: fish productivity, plankton, food chain, Louisiana 



IV-D-15 



Zilberberg, M.H. 1966. Seasonal occurrence of fishes in a coastal marsh 



of northwest Florida. Publications of the Institute of Marine Science, 



University of Texas 11:127-134. 



The biota of a northwest Florida coastal marsh was analyzed, and 

 the relation of salinity and temperature to the fish population was 

 studied for one year. The study area consists of 700 acres of 

 estuarine water and marsh which lie between the Gulf of Mexico and 

 higher ground occupied by stands of Sabal-palm and longleaf pine. 

 Three habitats were studied: woodside canals, ponds, and tidal 

 creeks. 



No direct correlation between the abundance of the five species of 

 fish studied and salinity was observed. It was concluded that variations 

 in temperature had a greater influence upon the variation in fish 

 population than did salinity fluctuations. (A. A. and B.W.) 



Keywords: fishes, coastal marsh, marsh biota, salinity, Florida 



IV-D-16 



Hall, C.A. 1971. Migration and metabolism in a stream ecosystem. 



Ph.D. Thesis. University of North Carolina at Chapel Hill. 418 pp. 



(Diss. Abstr. 32:881-B) 



Fish migration and total stream metabolism were studied in New Hope 

 Creek, North Carolina, from April 1968 to June 1970. Upstream and 

 downstream movement of fishes was monitored using weirs with traps. 

 Most of the 27 species had a consistent pattern of larger fish moving 

 upstream and smaller fish moving downstream. Both upstream and 

 downstream movements were greatest in the spring. For example, in the 



170 



