Porpoise-releasing tuna purse seine

Details Porpoise-releasing tuna purse seine Porpoise-releasing tuna purse seine

1976-03-18

1977-02-08

Mancene, Louis G.

Fishing, trapping, and vermin destroying

Fishing

Nets

43106, A01K 7312

Patent

active

040065499

ABSTRACT:
A tuna fishing purse seine and a method for its operation provide for protection and release of porpoise captured along with a school of tuna. The seine includes an inner, upper net in addition to the main net, positioned alongside the main net and connected to it in one area. The two nets, each having its own corkline, are set together but may be independently pursed. During setting and pursing, tuna generally sound a considerable distance below the surface, while porpoise tend to remain near the surface for air, so that the porpoise are separated from the tuna by the pursing of the inner, upper net. The pursing of the upper net sweeps it over to one area of the main net, where porpoise can be released by the opening of a release panel or gate in the main net in that area. The captured tuna may then be sacked up in the usual manner, but using the outside of the pursed inner net as a portion of the enclosure retaining the tuna.

REFERENCES:
patent: 379751 (1888-03-01), Winsor
patent: 721517 (1903-02-01), Harris
patent: 3849927 (1974-11-01), Gonsalves

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