Millions of people could lose their livelihoods, food source, and be forced from their homes if the world does not meet the Paris goal to curb global warming which is endangering fish numbers, Canadian researchers said on Wednesday.

A study by the University of British Columbia compared the economic and environmental impact of holding the global average temperature rise to 1.5 degrees Celsius, as agreed in Paris in 2015, versus the current 3.5 degrees warming scenario.

Lead researcher Rashid Sumaila, director of the university's Fisheries Economics Research Unit, said they found meeting the Paris goal would benefit 75 percent of maritime countries, with the largest gains in poorer nations, by boosting fish supplies.