(of a vessel) the product of its capacity and its activity, and fishing effort of a fleet or group of vessels is the sum of the fishing effort of each individual vessel, a measure of the activity of fishing boats. Fishing effort is strictly defined in terms of "total standard hours fishing per year" but is often described less rigorously in terms of numbers of vessels, laevavõimsuse korrutis püügil oldud päevade arvuga. See on kalavarudele avaldatava surve, koormuse, mõju mõõt.