In Washington, where salmon is a multibillion dollar industry, government staff terminations and budget freezes may put salmon production at risk.

© Grant Hindsley for The New York Times

In Washington, where salmon is a multibillion dollar industry, government staff terminations and budget freezes may put salmon production at risk.

© Grant Hindsley for The New York Times

As Canada wrangles an epic, decades-long saga of who can fish for lobster, and when, emerging threats are heating up the conflict in Nova Scotia.

A multibillion-dollar expansion helped the canal accommodate king-size cargo ships. It might also be fueling ecological upheaval.