17.08.2015

This information helps the fishermen in locating the PFZ identified in the maps, even if they reach it a day later. This information is not different from what is used in traditional ways of finding fish. A study on satellite-based PFZ in Tamilnadu and the Union Territory of Puducherry indicated that fishermen who used this information correlated their traditional knowledge with scientific data. For instance, fishermen traditionally use natural indicators such as water colour, wind speed and direction, tidal fluctuations and bird aggregation.

PFZ advisories were found more beneficial to artisanal, motorised and small mechanised sector fishermen engaged in pelagic fishing than to activities such as ring seining, gill netting etc. Typically, the information given on pelagic fishes is traced through chlorophyll concentration via satellite. These fishes are found in upper water levels. Satellite information will only be available as far as light penetrates the ocean, which is where pelagic fishes live.