While these anthropogenic translocations may parallel natural geologically-driven mixing events that occur on deeper time scales, they nevertheless have potential conservation implications given the increasing
They aren’t actually fish. They can make copies of themselves. And some older ones can become young again.
The beluga sturgeon is a large and long-lived species of freshwater fish native to the temperate waters of the Caspian… From Mosquitoes to Sharks: The Deadliest Creatures on Earth Animals are all around us. Because of their proximity, many people take for granted how truly dangerous some ...
Seven species of carp(鲤鱼) native to Asia have been introduced into United States waters in recent decades but it's four in particular-bighead black grass and silver-that worry ecologists biologists fishers and policymakers alike. Introduced in the southeast to help control weeds and parasites in...
Fish sampling is an important component of wetland research, management, conservation, monitoring, and assessment programs, and studies of fish abundance, productivity, and community structure can provide important information about wetland condition and
Salmon, trout and charr, belonging to the genera Oncorhynchus, Salmo and Salvelinus, are native fish of the cool waters of the northern hemisphere. All spawn in fresh water and many migrate to sea where growth is rapid because of the better availability of food. The chief characteristics of ...
A small-bodied cyprinid fish native to continental Europe and introduced in the 1970s to the U.K, the sunbleak Leuciscus delineatus, has been shown pre- viously to establish closer social associations with native species of similar size than do native species amongst themselves. To assess the...
Although Brazil is a pioneer in the induced reproduction of freshwater fish, hormonal induction protocols have not yet been established for many commercially important native species. In addition, detailed studies of reproductive biology and early development are still needed to improve breeding techniques...
The interaction of pathogens between wild and farmed aquatic animal populations is a concern that remains unclear and controversial. Ichthyophthirius multifiliis, a ciliated protozoan parasite, is a pathogen of freshwater finfish species with geographic
. In response to the decline of freshwater fishes, governmenthatcheriesin New South Wales (NSW) and Victoria began producing native fish fingerlings in the late 1970s to re-establish some species, to increase fish abundance and to enhance recreational fishing opportunities (Rowlandet al., 1983; ...