Good habitat and an understanding of the wildlife populations pays off in sustainable harvests.

I've been interviewing fishermen, logging the fish caught, and making recommendations to allow for long-term sustainable harvests from the sea.

Otherwise, sustainable harvest would not be possible.

Some of Australia's fisheries are already overexploited, and quotas have been set for the sustainable harvest of many marine species.

This creates an increased need to focus on plant conservation in these areas, ensuring sustainable harvest as well as ecosystem sustainability.

This species has yet to be bred in captivity for sustainable harvest.

As a result of poor planning for sustainable harvests, the island today has overcrowded forests of mainly young trees.

"Yet where there have been outbreaks not that far away, there has been a sustainable harvest."

Behind these happy outcomes lie three alternative arrangements that have evolved to preserve a commons resource while still permitting a sustainable harvest.

According to Hilborn, the "loss of some species, and indeed transformation of the ecosystem is not incompatible with sustainable harvests."