Detailed project information for Study Plan Number 09047

Branch :	Conte Anadromous Fish Laboratory
Study Plan Number :	09047
Study Title :	Estimation of Atlantic salmon smolt passage and outmigration in the Connecticut River by remote acoustic technology
Starting Date :	02/01/1999
Completion Date :	09/29/2002
Principal Investigator(s) :	Haro, Alexander
Primary PI :	Haro, Alexander
Telephone Number :	(413) 863-3806
Email Address :	haro@usgs.gov
SIS Number :	5003632
Primary Program Element :	Fisheries and Aquatic Resources
Second Program Element :	Fish and Aquatic Habitats
Status :	Active
Abstract :	Early attempts to reintroduce Atlantic salmon to southern New England rivers in the 1960s resulted in initial success. In the Connecticut River, for example, approximately 200 to 500 adult salmon have returned annually since the inception of the program. However, the increased effort of smolt and fry stocking in the 1980s and 1990s has not resulted in increased adult returns, indicating decreases in return rates of hatchery and stream-reared smolts. The reason(s) for these low returns are unclear. Currently, fry and parr survival and production of smolts in headwater rearing habitats appear to be high. There are some indications of losses of smolts during downstream migration due to delays caused by dam impoundments, turbine mortality, or predation, yet these losses have not been quantified and summarized on a cumulative, basin-wide level. Several recent attempts to estimate these losses have included trapping, and tracking of smolts via radio telemetry through the Connecticut River mainstem.
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