were compared with respect to their biological and physical components. 

 The study found that small salinity oscillations promoted a high 

 overall diversity of fishes at the headwaters of the creek, even 

 though few fish species maintained permanent populations there. 

 Juvenile fishes were abundant in the summer and fall. Extreme 

 temperature and low dissolved oxygen levels prompted a migration of 

 fishes from these areas in late summer. Permanent fish populations 

 were found at the mouth of the creek and in an adjacent tidal river. 

 (J.B.) 



Keywords: tidal marshes, fishes, estuarine animals, productivity, 

 Georgia 



IV-D-22 



De la Cruz, A. A., and H. Kawanabe. 1967. The population and food habits 



of fish in a small estuarine pond. Natural and Applied Science Bulletin 



20:473-477. 



The population of two species of fish in a small tidal estuarine 

 pond was estimated by means of the marking and recapture method. 

 Results were compared with figures obtained when actual count of the 

 total fish population was made, Gambusia affinis and Mollienesia 

 lati pinna were the two dominant species in the pond numbering 469 

 (449 by total count) and 120 (105 by total count) respectively. 

 Food habits of the fish were determined by analysis of stomach con- 

 tents. The fish inhabitants of the pond and one abundant species 

 of shrimp were found to feed on a variety of food items which 

 include both living biota (e.g., micro-algae, small benthic animals, 

 and terrestrial insects) and dead organic material (e.g., organic 

 particular detritus). (A. A.) 



Keywords: fishes, food habits, tidal ponds, Sapelo Island, Georgia 



IV-D-23 



Carr, W.E.S. 1971. Quantitative studies of the feeding habits of juvenile 

 fishes utilizing nursery areas in the estuarine zone. Page 35 JH 

 D.S. Gorsline, ed.. Second national coastal and shallow water research 

 conference; abstract vol. University of Southern California, 

 Los Angeles. (Abstr.) 



Estuarine areas play a vital role in the life cycles of the majority 

 of species of finfish and shellfish that are harvested annually in 

 coastal fisheries. The role of habitats within the estuarine zone 

 as nursery areas is now well documented. The simultaneous occupancy 

 of estuarine nursery areas by the juveniles of many species of fish 

 poses some important problems with regard to the partitioning of 



175 



