Saving Seafood

New report says future of Maine lobster industry could be worse

January 29, 2018 — ELLSWORTH, Maine — Warming ocean waters will have a big impact on Maine’s $547 million lobster industry in coming years, but the future would look a lot bleaker if not for the conservation efforts of the state’s thousands of lobster fishermen.

According to a study led by scientists at the Gulf of Maine Research Institute, the University of Maine and NOAA Fisheries, conservation practices long advocated by Maine lobstermen are helping make the lobster fishery more resilient to climate change.

For generations, lobstermen in Maine have returned large lobsters and egg-bearing female lobsters to the water rather than keeping them. Lobstermen first marked the tails of the egg bearers with a distinctive “V-notch” to give them further protection.

According to the scientists, these conservation practices, developed by custom and now mandated by state law, distinguish the fishery in the Gulf of Maine, where Maine harvesters trap some 83 percent of all lobster landings, from southern New England, where fishermen historically refused to take the same steps to preserve large, reproductive lobsters.

Funded by the National Science Foundation and published this week in the Proceedings of the National Academy of Sciences, the study shows how warming waters and contrasting conservation practices have contributed to significantly different results in the two fisheries.

Over the past decade (at least until this past year), Maine lobster landings have climbed steadily, setting new records nearly every year. During the same time period, the southern New England lobster population, and lobster fishery, has collapsed.

According to figures compiled by regulators, the commercial lobster landings in Connecticut fell from more than 2.5 million pounds in 1995 to about 200,000 pounds in 2015. In Rhode Island, the catch fell from more than 5 million pounds in 1995 to less than 2.4 million pounds in 2015. In New York, the commercial lobster industry has virtually disappeared.

Led by Arnault Le Bris of the Gulf of Maine Research Institute, the scientists used advanced computer models to simulate the ecosystem under varying conditions. The results show that temperature change was the primary contributor to population changes, but conservation efforts made significant differences in how the lobster population responded.

Read the full story at the Ellsworth American

 

New study: Industry conservation ethic proves critical to Gulf of Maine lobster fishery

January 22, 2018 — A new study, led by scientists at the Gulf of Maine Research Institute and colleagues at the University of Maine and NOAA, demonstrates how conservation practices championed by Maine lobstermen help make the lobster fishery resilient to climate change.

For generations, lobstermen in Maine have returned large lobsters to the sea and have designed a special way of marking egg-bearing lobsters to give them further protection. This conservation culture distinguishes the Gulf of Maine fishery from southern New England, where fishermen have not historically taken the same steps to preserve large, reproductive lobsters.

The study, funded by the National Science Foundation and published in Proceedings of the National Academy of Sciences (PNAS), shows how warming waters and contrasting conservation practices contributed to simultaneous record landings in the Gulf of Maine fishery and  collapse in southern New England.

Led by Dr. Arnault Le Bris, the research team used advanced computer models to simulate the ecosystem under varying conditions, allowing them to understand the relative impacts of warming waters, conservation efforts, and other variables. Their results show that, while temperature change was the primary contributor to population changes, conservation efforts made a key difference in population resiliency.

Impacts of warming

Over 30 years (1984-2014), ocean temperatures increased rapidly in both regions. Warming in both regions shifted optimal summer ocean temperatures northeast, causing the southern New England  population to decline and the Gulf of Maine population boom. The researchers estimate that, during this 30-year period, the Gulf of Maine population increased by 515%, while the southern New England population declined by 78%. Challenges associated with warmer temperatures include decreased survival of larval lobsters, increased incidence of shell disease, and increased predation.

Read the full story at PHYS.org