Age and growth studies on the Indian mackerel Rastrelliger kanagurta (Cuvier) with special reference to length-frequency data collected at cochin

Abstract

Length-frequency studies on the Indian mackerel Rastrelliger kanagurta (Cuvier) have been made by Pradhan (1956), Sekharan (1958) and Balakristman (1962-MS). but there has been no agreement with regard to the interpretation of age and growth rate of the fish. Since little work has been done on study of hard parts of the fish, tagging or rearing of the fish under captivity, verification of any of the conclusions arrived at by length-frequency studies has not been possible. Mention may be made in this connection of the work of Seshappa (1958) to interpret the significance of the scale rings of the fish.