Consequently, although jack mackerel catches continued to rise, surpassing 3 million tonnes in 1991, pilchard harvests collapsed back to mid-1970s levels.
Their target species include anchovies sardinellas, mackerels, scads, and some tuna-like fish, landed fresh.
Commercial species including prawns, sardines, mackerels, oil sardines, and some crustaceans are harvested in the region.
These monogeneans were found in the gills and pseudobranchs of mackerels.
They found that mackerel populations in coastal and oceanic regions differed markedly in the composition of their parasite faunas.
Particularly, the catches of some major species such as breams, mackerel, prawns, and cephalopods declined over the years.
The parasite data supported other data on the distributions of different life history stages of mackerel by suggesting the existence of separate northern and southern populations.
Pelagic fishing gear is normally used for shoaling mid-water swimming species such as mackerel, pilchards and sprats.
