This manual represents the provincial standard for assessing fish populations and communities in medium to large non-wadable rivers in Ontario. The Riverine Index Netting (RIN) nets and the manual have been developed to efficiently catch small, large, and extra-large fishes in rivers. The nets can be used singly or in combination to gather fish community information. This instruction manual assumes that the user has sound knowledge and field experience in netting and sampling fishes. It is subdivided into sections on: gear description, pre-field activities, field procedures, post field activities, and data management. A hypothetical case study is given to illustrate how the Riverine Index Netting method can be employed at a hydro power development. Appendices are also provided on bathymetry mapping, aging structures, contaminant analysis, field forms, equipment list, and fish species codes.--Document.

Describes and presents results from a netting project on Saddle Lake in the Sault Ste. Marie district of Ontario, conducted April to June 1987 with the objective of capturing and estimating the population of brook trout from fish marked in the previous fall and winter. Fish were gill nets and trap nets. Results presented include catch by net type, brook trout age distribution, length and weight distribution, population estimates using the adjusted Petersen method, and stomach contents of brook trout.

Describes and presents results from a netting project on Megisan Lake in the Sault Ste. Marie district of Ontario, conducted in spring 1989 to determine population parameters and lake trout diet, and to determine relative abundance of fish species. Fish were captured using short-duration single-mesh gill nets, overnight multiple mesh gill nets, and trap nets. Results presented include catch by net type and by depth of net setting, lake trout age distribution, length and weight distribution, a population estimate using the adjusted Petersen method, and stomach contents of lake trout.