Saving Seafood

Fish More Vulnerable to Warming Water Than First Thought

July 2, 2020 — Global warming looks like it will be a bigger problem for the world’s fish species than scientists first thought: A new study shows that when fish are spawning or are embryos they are more vulnerable to hotter water.

With medium-level human-caused climate change expected by the end of the century, the world’s oceans, rivers and lakes will be too hot for about 40% of the world’s fish species in the spawning or embryonic life stages, according to a study in Thursday’s journal Science. That means they could go extinct or be forced to change how and where they live and reproduce.

Until now, biologists had just studied adult fish. For adult fish, around 2% to 3% of the species would be in the too-hot zone in the year 2100 with similar projected warming. So using this new approach reveals a previously unknown problem for the future of fish, scientists said.

Read the full story from the Associated Press at the New York Times

Your dinner might be swimming North thanks to climate change, Rutgers study says

May 18, 2018 — Climate change is making oceans warmer and the fish are taking flight.

And that could have a big impact on New Jersey’s $7.9 billion fishing industry according to a new Rutgers-led study published Wednesday.

Aquatic life has a narrow tolerance for temperature range, so as the water heats up species populations are shifting northward to find suitable habitat according to Malin Pinksy, a co-author of the study and an assistant professor in Rutgers’ Department of Ecology, Evolution and Natural Resources.

By 2100, the Atlantic’s temperature off the Jersey Shore could rise to levels currently seen in Virginia. That could lead to species like black sea bass and summer flounder, both staples of New Jersey’s fishing industry, leaving the area and being replaced by more southern species like Atlantic Croaker.

Pinsky said the most dramatic example of a shifting fishery is the Atlantic Cod. The species could lose 90 percent of its habitat in U.S. waters by 2100 in a worst case scenario.

Read the full story at NJ