Holding Your Breath: Surviving the Heart of Marine Darkness

As you swim through a coral reef, you see parrot fish, clams and other colorful aquatic creatures swimming elegantly and going about their lives. While you, with your snorkel, are confined to the surface of the water and the occasional dive for as long and as deep as you can hold your breath, the fish “breathe” easily with their gills (or lungs in the cases of some evolutionarily interesting fish). But do they breathe that easily? Living in and getting oxygen from a high-pressure aquatic environment is difficult and metabolically demanding, and some fish have found special ways to make it easier.

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Moving Closer to Plenty Of Fish In The Sea: Gradual Recovery Of A Critically Endangered Fish Species

The Nassau grouper has long been critically endangered due to overfishing throughout its Caribbean range. The Cayman Islands government instituted a comprehensive program to boost Nassau grouper numbers, and partnered with scientists and conservation organizations in a project to monitor the grouper population. Over the fifteen year program, the fish population has increased. The program and project provide successful models for marine conservation partnerships.

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Are we accidentally treating fish with anti-depressants? Pharmaceuticals in our surface waters

The ever-growing and expanding pharmaceutical industry is overwhelming wastewater treatment plants, making the release of pharmaceuticals into the environment a big problem. A recent study illustrates that the presence of anti-depressants in streams can change the behavior of mosquitofish. The potential effects of pharmaceutical pollution on wildlife should make us think carefully about how we dispose of our leftover medicines.

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These tasty fish are more likely to get eaten when stressed

As human populations continue to rise, especially along coastlines, the occurrence of various stressors tend to increase. This study explored the ability of a commercially important species, the European seabass, to recover following short term exposure to these stressors by evaluating their predator avoidance behavior. In short, acidic waters led to greater risk-taking behavior in these fish, which can have serious implications for their survival in a changing world.

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Diving deep: benefits of deep sea coral refuges in the Atlantic

Take a dive into the fascinating world of deep sea coral reefs off the South Atlantic Coast and their role in supporting diverse reef fish communities. The paper examines the differences between shallow and deep reefs and explores why they may require distinctions when setting management goals.

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Mercury rising. How the climate is driving recent increases in the mercury levels of freshwater fishes

Mercury is a toxic heavy metal that is present in many fishes that we eat. Although environmental regulations have cut down on mercury emissions in developed nations, the level of mercury in many top predator fish including large mouth bass has been increasing in recent decades. A complex mix of many different factors including local weather conditions and global climate patterns affect the levels of mercury in fish.

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