Offshore spawning and year-class strength of northern cod (2J3KL) during the fishing moratorium, 1994-1996 / John T. Anderson and George A. Rose.: Fs70-1/2000-100E-PDF

Recently, two new research programs were initiated to measure stock performance during the rebuilding period of the northern cod population. An acoustic survey designed to measure the abundance of adult and demersal juvenile cod of the northern cod stock off southern Labrador during the spring post-spawning period began in June 1994. Second, a juvenile fish pelagic trawl survey began in August of 1994, to measure the distribution and abundance of pelagic juvenile cod throughout the entire coastal and shelf regions of Newfoundland and Labrador following spring spawning. The purpose of this paper is to report on the initial findings of these two surveys, 1994-1996, and compare observations of offshore spawning in spring with the production of pelagic juvenile cod each year. The paper also reports the abundance of post-spawning cod in the Hawke Channel area in spring and that of pelagic juveniles each following summer for all coastal and shelf areas of the northern cod. The total number of eggs produced are estimated based on the abundance, maturity and fecundity of observed spawners and then the magnitude of the independent estimates of eggs and pelagic juveniles are compared for each year.

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