8. The estimated larval developmental time in 1983 from hatching to 

 transformation into a juvenile was approximately 80 days. 



9. Stage 3 to 5 larvae were collected at the mouth of the Niantic 

 River in greatest abundance during a late flood tide. Many of 

 these larvae apparently used tidal currents to re-enter and remain 

 in the river. 



10. Medusae of the lion's mane jellyfish were identified as a 

 potentially important predator of winter flounder larvae, 

 particularly in the upper Niantic River. 



11. Post-larval juveniles were most common in the lower Niantic River. 

 Absolute abundance estimates were uncertain because of sampling 

 problems, but densities of 8 to 10 juveniles per 100 m^ were found 

 during late summer. Growth of juveniles at the Lower River station 

 was examined. An average monthly survival of 40.3% was calculated 

 for these fish. 



12. The estimated annual impingement of winter flounder at MNPS was the 

 second highest total during the past 11 years. More than half of 

 the individuals impinged were smaller than 15 cm. More males than 

 females were impinged, perhaps because of a lesser ability to 

 escape intake currents. 



13. Winter flounder larvae were entrained at MNPS from late February 

 through late June and the 1983 estimate was the second highest 

 since 1976. Entrainment survival for later developmental studies 

 was approximately 80%, but was 100% for earlier stages. 



57 



