Statistical analysis of the somatic growth rate of O+ fish in relation to temperature under natural conditions

TY - JOUR

T1 - Statistical analysis of the somatic growth rate of O+ fish in relation to temperature under natural conditions

AU - Mooij, W.M.

AU - Van Nes, E.H.

N1 - Reporting year: 1998 Metis note: 2261; CL; AFW ; AqE file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs1998/Mooij_ea_2261.pdf

PY - 1998

Y1 - 1998

N2 - The somatic growth rate of 0+ fish of the six major species in Dutch shallow eutrophic lakes, bream (Abramis brama), roach (Rutilus rutilus), pikeperch (Stizostedion lucioperca) (planktivorous and piscivorous), perch (Perca fluviatilis), ruffe (Gymnocephalus cernuus), and smelt (Osmerus eperlanus), was analysed by using a differential equation. This equation models the instantaneous growth rate of a fish as a temperature-dependent power function of body weight. Two of the model parameters were calibrated by optimising the prediction of the growth rate of the fish. Using a new method, which included a parametric bootstrap procedure, confidence limits were estimated for these two calibrated parameters and were used to test the significance of differences between species in growth performance under natural conditions. These tests revealed four groups of species: (A) smelt, (B) roach and bream, (C) ruffe and perch, and (D) piscivorous pikeperch. Growth performance of planktivorous pikeperch mainly overlapped with roach and bream (B) but showed some overlap with ruffe and perch (C). Differences and similarities are explained from the food type (D Versus A, B, and C) and the phylogenetic constraints (A versus B versus C) of each species. [KEYWORDS: Shallow eutrophic lake; rutilus-rutilus; salmo-trutta; brown trout; body-size; tjeukemeer; patterns; bream; roach; life]

AB - The somatic growth rate of 0+ fish of the six major species in Dutch shallow eutrophic lakes, bream (Abramis brama), roach (Rutilus rutilus), pikeperch (Stizostedion lucioperca) (planktivorous and piscivorous), perch (Perca fluviatilis), ruffe (Gymnocephalus cernuus), and smelt (Osmerus eperlanus), was analysed by using a differential equation. This equation models the instantaneous growth rate of a fish as a temperature-dependent power function of body weight. Two of the model parameters were calibrated by optimising the prediction of the growth rate of the fish. Using a new method, which included a parametric bootstrap procedure, confidence limits were estimated for these two calibrated parameters and were used to test the significance of differences between species in growth performance under natural conditions. These tests revealed four groups of species: (A) smelt, (B) roach and bream, (C) ruffe and perch, and (D) piscivorous pikeperch. Growth performance of planktivorous pikeperch mainly overlapped with roach and bream (B) but showed some overlap with ruffe and perch (C). Differences and similarities are explained from the food type (D Versus A, B, and C) and the phylogenetic constraints (A versus B versus C) of each species. [KEYWORDS: Shallow eutrophic lake; rutilus-rutilus; salmo-trutta; brown trout; body-size; tjeukemeer; patterns; bream; roach; life]

U2 - 10.1139/cjfas-55-2-451

DO - 10.1139/cjfas-55-2-451

M3 - Article

VL - 55

SP - 451

EP - 458

JO - Canadian Journal of Fisheries and Aquatic Sciences

JF - Canadian Journal of Fisheries and Aquatic Sciences

SN - 0706-652X

IS - 2

ER -