Studies on the mechanical characters of purse seine in relation to its fishing efficiency

Introduction Part I 1. Outline of purse seine Part II 2. Fishermen's current measuring device, "Siomi-Ito" 3. On the weight of webbing in water 4. Resistance of rectangular strip of net in water Part III 5. Model experiments on the two-boat type purse seine 6. Field-observation with the full-size purse seine 7. Theoretical analysis of the sinking movement of the purse seine Part IV 8. Distribution of the daily catches of purse seine 9. Difference in the fishing capacities of the one-boat and two-boat type purse seine 10. Difference in the fishing capacities of the cotton and Kyokurin purse sein