US researchers measured and compared the net dark oxygen uptake of fish–anemone pairs when partners were separate from each other, together as a unit, and together as a unit but separated by a mesh screen that prevented physical contact.Read more
After a detailed review of import records for marine tropical fish entering the United States over a year's span, scientists found 1,802 species imported, or 22 percent greater biodiversity than previously estimated. More than 11 million fish were imported from 40 countries, which was less than previously reported, as many freshwater fish and marine invertebrates were being mistakenly counted as marine fish.Read more
In a study that covered 17 separate locations round Lizard Island in far North Queensland, researchers from the ARC Centre of Excellence for Coral Reef Studies at James Cook University videoed the behaviour of large reef fish, allowing them to ideRead more
Federal authorities concede the industry in the territories could lose more than $1 million a year. But creating a healthy reef ecosystem is a priority, Roy Crabtree, southeast regional administrator for the National Oceanic and Atmospheric Administration, said this week.
The U.S. Coast Guard is expected to enforce the annual catch limits with help from local authorities. Both commercial and recreational fishermen are supposed to report their catches, but some fishermen say enforcement will be hard.Read more
In research aimed at understanding the process of fish population decline when coral reefs sustain major damage, PhD student James Kerry and Professor David Bellwood have found that big fish show a marked preference for sheltering under large, flaRead more
Dead zones are areas in the ocean where oxygen levels are so low that most fish cannot survive over the long term.
Blue marlins and many other billfish are high-energy fish that need large amounts of dissolved oxygen. By comparing the movement of the blue marlins and the location of low-oxygen areas, scientists have shown that blue marlins venture deeper when dissolved oxygen levels are higher, and remain in shallower surface waters when low dissolved oxygen areas encroach on their habitat from below.Read more
Because of the great variety of these habitats, the senses of these different species have consequently evolved quite differently, exhibiting a great diversity, with many senses not yet understood or even identified. There are thus still many mysteries regarding the behaviour of aquatic creatures. For example, how do eels find their way across the Atlantic ocean? Why is it so very difficult to swim up to a fish from behind without being detected? And even bank-side freshwater fishermen, for example, know that the vibrations from footsteps can be detected by fish.Read more