The east and south Chatham Rise stocks of orange roughy in New Zealand have lost their Marine Stewardship Council (MSC) certification, which is problematic for the fishery as it sends more than half its catch to the U.S. The loss of certification is due to new scientific evidence that shows orange roughy reach maturity at 80 years, contradicting previous assumptions that they reach maturity at 30 years. Environmentalists are calling for a ban on bottom-trawling for orange roughy and are urging the government to close biodiversity hotspots to this type of fishing.