TY - JOUR
T1 - Age-specific patterns in density-dependent growth of white crappie, Pomoxis annularis
AU - Pope, Kevin L.
AU - Wilde, G. R.
AU - Durham, B. W.
PY - 2004/2
Y1 - 2004/2
N2 - The relationship between growth in white crappie, Pomoxis annularis Rafinesque, and climate, lake morphometry and population density was studied in 103 Texas reservoirs. Growth of age-0 through age-3 white crappie was significantly (P≤0.05) related to latitude, growing season and surface area. Growth of age-1 through age-5 white crappie also was related to annual precipitation. Multiple linear regression models with precipitation and mean catch per unit effort (CPUE) of white crappie as independent variables explained 14-22% of the variation in growth of age-0, -1 and -2 white crappie. By contrast, growth of age-3, -4 and -5 white crappie was unrelated to CPUE. Apparently, between age 2 and 3, the density of white crappie in Texas reservoirs falls below a density-dependent growth threshold beyond which growth is no longer related to density. This density-dependent threshold was most likely related to angler harvest of larger, older white crappie.
AB - The relationship between growth in white crappie, Pomoxis annularis Rafinesque, and climate, lake morphometry and population density was studied in 103 Texas reservoirs. Growth of age-0 through age-3 white crappie was significantly (P≤0.05) related to latitude, growing season and surface area. Growth of age-1 through age-5 white crappie also was related to annual precipitation. Multiple linear regression models with precipitation and mean catch per unit effort (CPUE) of white crappie as independent variables explained 14-22% of the variation in growth of age-0, -1 and -2 white crappie. By contrast, growth of age-3, -4 and -5 white crappie was unrelated to CPUE. Apparently, between age 2 and 3, the density of white crappie in Texas reservoirs falls below a density-dependent growth threshold beyond which growth is no longer related to density. This density-dependent threshold was most likely related to angler harvest of larger, older white crappie.
KW - Angling
KW - Length
KW - Pomoxis annularis
KW - Population dynamics
UR - http://www.scopus.com/inward/record.url?scp=1542379867&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2400.2004.00360.x
DO - 10.1111/j.1365-2400.2004.00360.x
M3 - Article
AN - SCOPUS:1542379867
VL - 11
SP - 33
EP - 38
JO - Fisheries Management and Ecology
JF - Fisheries Management and Ecology
SN - 0969-997X
IS - 1
ER -