activity, length-weight relationships, survival, movements, early life 

 history, and entrainment were conclucted in following years and were 

 reported in greater detail in Battelle-William F. Clapp Laboratories 

 (1978-79) and in NUSCo (1975, 1980-83). This report summarizes results 

 of the 1983 adult, larval, and juvenile surveys, and data from the 

 trawl, impingement, and entrainment monitoring programs. 



MATERIALS AND METHODS 



Adult population studies 

 Abundance estimates 



Preliminary sampling for adult winter flounder in the Niantic River 

 started on January 12 and continued weekly or biweekly to ascertain 

 abundance and spawning condition. After iceout in the upper river, 

 enough winter flounder were present for mark and recapture studies and 

 the 1983 adult population abundance survey began on February 22. The 

 survey was conducted for 2 days each week through April 6 when the 

 criterion was met that the weekly percentage of ripe females was less 



