lobsters

Fitness Trackers For Lobsters | Earth Wise

October 20, 2020 By EarthWise Leave a Comment

The lobster industry is somewhat unique, at least in this country, in that it involves an animal food that is kept alive until it has reached the destination where it will be consumed or used. As a result, the industry has to deal with a problem they call “shrink”, which is the mortality lobsters experience as they change hands from capture to kitchen.

Maine’s lobster industry has reached out to the University of Maine Lobster Institute along with collaborators at other institutions to help quantify and mitigate stress points in the lobster supply chain that reduce survival and profitability.

A 2-year project was funded by the National Oceanic and Atmospheric Administration to create miniature sensory devices – crustacean heart and activity trackers (called C-HATs). These are essentially Fitbits for lobsters. The noninvasive devices strapped on a lobster monitor its heart rate and movement as it passes from trap to on-board live tank to live storage crate to truck to wholesaler to retailer or processor.

A separate sensor-equipped device called the MockLobster travels along with the lobsters to log environmental conditions experienced, including temperature, light and dissolved oxygen levels.

The hope is to be able to get a good handle on the conditions lobsters experience from trap to market and learn where problems are likely to arise. The researchers are also working to develop economical, standardized protocols to monitor water quality and the heath of lobsters during their movement through the supply chain.

The goal is to produce big improvements in the bottom lines of everyone along the supply chain along with big improvements in the health of the lobsters destined for market.

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Fitness trackers, environmental sensors prototyped to improve survival in the lobster supply chain

Photo, posted August 29, 2015, courtesy of Adam Grimes via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Pesticides In The Great Barrier Reef

November 7, 2019 By EarthWise Leave a Comment

Australia’s Great Barrier Reef is one of the greatest natural wonders in the world and it has been under siege by warming waters and ocean acidification. Widespread coral bleaching has damaged or destroyed large portions of the 1,400-mile long coral reef system. But the effects of climate change are not the only threat to the reef. Pesticides found in waterways that flow into the Great Barrier Reef are another serious problem.

According to a new study by the University of Queensland, the combined toxicity of 22 of the most common pesticides that flow into the Reef are not meeting pollution reduction targets.

Different pesticides affect different organisms. Herbicides affect organisms that photosynthesize such as seagrass, corals, mangroves, and algae. Insecticides affect insect larvae in freshwater, and crustaceans such as crabs, prawns, and lobsters. Previous assessments have only examined individual pesticides and only for limited times. The new study has utilized a methodology that estimates the combined toxicity of multiple pesticides found in the waterways that discharge into the Reef and does it for the entire wet season.

The research revealed that the pesticide reduction target set in the Australian Government’s Reef 2050 Water Quality Improvement Plan is not being met. Only one natural resource management region – the Cape York region – was found to be meeting its target.

By having estimates of the risk posed by pesticides in the various regions and individual waterways, governments, farmers, and conservationists can see which areas pose the greatest risk and where to maximize efforts. Stakeholders have to come together to reduce pesticide concentrations through better management practices and by using less toxic pesticides.

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