摘要：Alewives were collected by nighttime gill netting during summer 1999 from 12 Connecticut lakes that support landlocked populations to determine relationships between population characteristics and physicochemical lake variables. Mean catch-per-unit-effort (CPUE) ranged from 0.2 to 16.4 age-1 and older alewives per net hour. Maximum ages of alewives among lakes ranged from two to five years, and mean back-calculated length-at-age-1, used to index growth rate, ranged from 78 to 146 mm. Mean back-calculated length-at-age-1 was positively correlated with mean relative condition factor (K n ), watershed area:lake surface area ratio, watershed area:lake volume ratio, lake surface area:lake volume ratio, conductivity, total nitrogen, alkalinity, calcium, magnesium, and chlorophyll a, and negatively correlated with retention time, maximum lake depth, mean lake depth, and transparency. Mean K n ranged from 0.93 to 1.23 and was positively correlated with mean back-calculated length-at-age-1, watershed area:lake volume ratio, lake surface area:lake volume ratio, total nitrogen, chlorophyll a, and potassium, and negatively correlated with maximum lake depth and transparency. Growth and K n of alewives were highest in shallow, productive lakes with low transparencies. CPUE was not related to growth rate or to any physicochemical lake variable.
