Each year, hundreds to thousands of fish aggregate at highly predictable times and locations to spawn, producing larvae that will spend at least a month in the plankton before settling to reef habitat. The larvae of some species of reef fish appear to survive better depending on the timing of when they were spawned, according to new research.
Largemouth bass are native to North America, but they have been distributed worldwide for recreational fishing. When they’re in waters outside North America, largemouth bass can cause declines in native fish abundance, disrupting the ecosystem. Officials could save $1 million a year in monitoring for invasive fish, experts say, by using tournament fish-catch data.
Using the nation's weather radar network, two doctoral students have developed a technique for forecasting something other than the weather: the orientation behavior of birds as they migrate through the atmosphere at night. The students have discovered a way to use the latest dual-polarization radar upgrade to measure broad-scale flight orientation of nocturnal migrant birds -- a promising development for biologists and bird enthusiasts.