Discriminant Analysis of Yellowtail Fishing Conditions on the Sagami Bay Coasts
1989 Volume 55 Issue 2 Pages 209-213
Details
1989 Volume 55 Issue 2 Pages 209-213
Discriminant analyses were carried out on the fishing conditions of yellowtails caught in stationary fishing nets on the Sagami Bay coasts during the past five years. The salinity of the water in the layer at a depth of 50m in Iwae (x1), the sea surface temperature in Iwae (x2), the north-south component and east-west component of wind direction and velocity in Ajiro, (x3) and (x4) respectively, were chosen and used as the explanatory variables.
It has been clarified that the effects of these variables on the results of discriminant analyses are x2, x4, x1 and x3 in the descending order of description. The variables x4 and x3 were both found to be contributing to good catches of yellowtails when the wind blows inshore. In the discriminating test with the discriminant, mean right discrimination rates of 93% were obtained. Thus the discriminant to discriminate between a good catch and no catch of yellowtails was acquired. We consider that this model is effective for the discriminant prediction of yellowtail fishing conditions.
