Victor W. Lambou

In order to make an estimate of the size of a population of animals at a given time by the Petersen method, use is made of a sample of the fraction of marked animals in the population. However, if some of the animals originally marked lose their marks and thus can not be identified in the sample, a Petersen type estimate will be biased, the magnitude of the bias depending upon the proportion of animals retaining their identity. If an estimate can be made of the animals which have retained their identity at a given time, it is possible to make corrections for this bias. This report presents...

In order to determine the efficiency and selectivity of flag gill nets in catching game fish, experimental flag gill nets were fished in Lake Bistineau during the period March through August, 1956. Flag gill nets contain no lead line and are hung on a top line which contains no floats. The experimental nets used consisted of the following mesh sizes: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 and 4.5 inch square mesh. For summary purposes the various species of fish were grouped into 3 types: (1) commercial fish (2) game fish and (3) other fish. The more valuable commercial fishes were caught at higher...

n order to determine the efficiency and selectivity of flag gill nets in catching game fish, experimental flag gill nets were fished in Lake Bistineau during the period March through August, 1956. Flag gill nets contain no lead line and are hung on a top line which contains no floats. The experimental nets used consisted of the following mesh sizes: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 and 4.5 inch square mesh. For summary purposes the various species of fish were grouped into 3 types: (1) commercial fish (2) game fish and (3) other fish. The more valuable commercial fishes were caught at higher...