TY - JOUR
T1 - Hatchery performance attributes of Nipigon, Assinica, and Iron River strains of age-0 brook trout
AU - Sutton, Trent M.
AU - Pangle, Kevin L.
AU - Greil, Roger W.
N1 - Funding Information:
We thank the Michigan Department of Natural Resources’ Marquette State Fish Hatchery for providing the brook trout used in this study. We would also like to acknowledge the efforts of J. Bobb, W. Bauer, K. Kasik, and S. Joseph in fish rearing and maintenance. Constructive comments on earlier drafts by P. Brown, S. Scott, and three anon- ymous reviewers improved this manuscript. Funding for this study was provided by Edison Sault Electric Company, Lake Superior State University, and the Sault Area Sportsman’s Club. This research was approved for publication as manuscript 16705 by the Purdue University Agricultural Research Programs.
PY - 2002
Y1 - 2002
N2 - The fingerling hatchery performance attributes of brook trout Salvelinus fontinalis of Lake Nipigon origin were compared with those of domesticated (Assinica) and nondomesticated (Iron River) strains of this species in a 150-d laboratory experiment. Despite similar initial sizes, the final mean length and weight of the Assinica strain (134.9 mm and 26.3 g) were significantly greater than those of the Nipigon (112.6 mm and 13.6 g) and Iron River (111.2 mm and 14.6 g) strains. Specific growth rates differed significantly among strains, with Assinica fish having the greatest mean daily percent increases in length and weight (0.98% and 3.10%, respectively), followed by the Iron River (0.93% and 3.03%) and Nipigon (0.86% and 2.69%) strains. The mean daily absolute rates of growth in length and weight were similar in the Nipigon and Iron River strains but significantly lower than for the Assinica strain. Survival rates and food conversion efficiency estimates were not significantly different among the three strains of brook trout. Relative weight values were significantly greater for Assinica (96.4%) and Iron River (94.0%) fish than for Nipigon (87.0%) fish. Based on these results, we recommend that fingerling Nipigon brook trout be reared more like nondomesticated strains of this species, such as Iron River fish, in hatchery environments.
AB - The fingerling hatchery performance attributes of brook trout Salvelinus fontinalis of Lake Nipigon origin were compared with those of domesticated (Assinica) and nondomesticated (Iron River) strains of this species in a 150-d laboratory experiment. Despite similar initial sizes, the final mean length and weight of the Assinica strain (134.9 mm and 26.3 g) were significantly greater than those of the Nipigon (112.6 mm and 13.6 g) and Iron River (111.2 mm and 14.6 g) strains. Specific growth rates differed significantly among strains, with Assinica fish having the greatest mean daily percent increases in length and weight (0.98% and 3.10%, respectively), followed by the Iron River (0.93% and 3.03%) and Nipigon (0.86% and 2.69%) strains. The mean daily absolute rates of growth in length and weight were similar in the Nipigon and Iron River strains but significantly lower than for the Assinica strain. Survival rates and food conversion efficiency estimates were not significantly different among the three strains of brook trout. Relative weight values were significantly greater for Assinica (96.4%) and Iron River (94.0%) fish than for Nipigon (87.0%) fish. Based on these results, we recommend that fingerling Nipigon brook trout be reared more like nondomesticated strains of this species, such as Iron River fish, in hatchery environments.
UR - http://www.scopus.com/inward/record.url?scp=0036077595&partnerID=8YFLogxK
U2 - 10.1577/1548-8454(2002)064<0188:HPAONA>2.0.CO;2
DO - 10.1577/1548-8454(2002)064<0188:HPAONA>2.0.CO;2
M3 - Article
AN - SCOPUS:0036077595
SN - 1522-2055
VL - 64
SP - 188
EP - 194
JO - North American Journal of Aquaculture
JF - North American Journal of Aquaculture
IS - 3
ER -