Age at Maturity as a Stress Indicator in Fisheries

摘要: years, this fishery provided food and income for the many communities scattered along east coast of Newfoundland. The Newfoundland fishing industry, based on annual migration cod from offshore spawning grounds Grand Bank to inshore feeding areas, had been mainstay province's economy (Figure 1). In 1950s, additional large winter aggregations were located in water depths 100-200 fathoms (Johnstone 1977). This discovery prompted development a large-trawler fishery, which included foreign vessels, landings increased through 1960s. By mid-1970s stock1 size declined, but it subsequently after Canada began exert control over rights within 200 miles its coastline 1 January 1977. (Before 1977 Canada's jurisdiction was limited 12 shore). Foreign declined time