In recent years, gray triggerfish discards have been two to three times higher than the number kept. Over the past 20 years, discarded black sea bass in the US Atlantic and Gulf of Mexico fisheries have outnumbered those brought to shore. Photo: Brendan RundeĪn angler might discard a fish if they don’t want to keep it or if it doesn’t meet regulations, such as a size limit, catch limit or closed season. A black sea bass with a protruding stomach shows signs of barotrauma. Learn more and watch digital shorts and climate portraits. PBS North Carolina’s State of Change initiative examines the impact of climate change on coastal and inland communities across the state and how communities and individuals have responded with innovative solutions. That fish might die at the surface or a predator might pick it off.
A bloated swim bladder can also act like swim floaties, preventing the fish from returning to deeper water when it’s released. The fish’s eyes may bulge out of its head. The gas inside a fish’s swim bladder, an internal organ that helps them float, expands and can even push other organs out of the fish’s mouth. When fish from about that depth or deeper are brought to the surface, the sudden drop in pressure can lead to injuries called barotrauma.īarotrauma looks extremely uncomfortable. The pressure at 90 feet underwater is almost four times greater than at sea level. They’ve also confirmed that helping a fish get back to deep water, through strategies like venting and recompression, significantly increases a fish’s chance of survival.ĭeepwater fish live under pressure. Over the past few years, they’ve determined discard survival likelihood for several deep fish species. Researchers at North Carolina State University’s Center for Marine Science and Technology, or CMAST, have been studying the fate of released fish, called discards, to more accurately estimate death rates from fishing and to improve survival of discards. Learn how you can be in the Sponsor Spotlight
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