The Gaspereau River
Alewife Stock and Fishery 2000: Data Summary.
Executive Summary
During the spring and summer of 2000, Nova
Scotia Power Inc. and the Acadia Centre for Estuarine Research collected data
about the Gaspereau River alewife stock. The spawning run was estimated to
contain just over 850,000 fish. Of these just over 750,000 (88%) were taken by
the fishery.
A count of alewives ascending the White Rock
fish ladder indicated that 98,883 fish ascended the ladder in 2000. The stock
continues to exhibit the characteristics of a heavily impacted stock. Most the
fish (94.5%) belonged to the 1995 and 1996 year classes, and less than 10% of
the run were repeat spawners. Alewives in 2000 averaged slightly older and
larger than during the 1997 or 1998, largely due to strong recruitment of age 5
fish (1995 year class) into the spawning run in 2000.
During 2000, the control gate at Forest Home
was opened on August 16th, presenting young-of-the-year (YOY)
alewives with the opportunity to migrate seaward via this route. YOY alewife
emigration at Forest Home began on September 6th. Just over 116,000
alewives moved down the bypass stream on September 6th and 7th
(Table 5). These fish ranged between in size between 42mm and 97mm in length,
and averaged 57.5mm (s.d.=10.6), about 15 to 20 mm smaller than YOY alewives
captured in September at this location during 1997 to 1999. |