Tuesday, September 27, 2011

Environmental Influences On Aggression In Aquarium Fish

An angry glare from the family goldfish might not be the result of a missed meal, but a too-humble abode. Fish in a cramped, barren space turn mean, a study from Case Western Reserve University has found...Along with environment size, Oldfield tested the complexity of an environment and the effects of number of fish within tanks. The addition of obstacles and hiding places using rocks, plants, or other similar objects can increase the complexity of the aquarium environment. He found that an increase in tank size and complexity can reduce harmful aggressive behaviors, and make for healthier fish at home. Oldfield quantified aggressive behavior as a series of displays and attacks separated by at least a second. Displays are body signals such as flaring fins. An attack could be a nip, chase, or charge at another fish. more

No comments: