Variability in Burbot Cohort Abundance at Juvenile and Adult Stages in Columbia Lake, British Columbia

摘要: Abstract This study examined changes in the abundance of juvenile (age-0 and age-1) adult Burbot Lota lota Columbia Lake, British Columbia, for 1991–1999 cohorts. The objectives were to quantify degree variation cohort at different life stages investigate timing recruitment limitation. Adult spawner age composition monitored a tributary spawning site from 1996 2001. Juvenile was estimated 1997 1999, providing age-0 indices 1997–1999 cohorts age-1 1996–1998 number spawners declined about 1,500 86 1999 then rebounded 995 by length frequency showed that this fluctuation reflected periodic influxes strong dominated population. strongest new (1999) observed 2001 came smallest spawners. Substantial differ...