Artificial light at night also makes guppies more courageous during the day, according to a behavioural study led by researchers from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and the Max Planck Institute for Human Development.
Hookworms exploit a live fast/die young strategy in their South American fur seal pup hosts, report Morris Animal Foundation-funded researchers at the University of Georgia. As a result, they often kill their host, rather than finding a happy equilibrium. Scientists are concerned that this type of hookworm infection could eventually pose a risk to critically endangered populations of fur seals.
A global study addresses a major uncertainty in how saltmarshes and mangroves will respond to sea-level rise; stresses importance of preserving 'accommodation space' for landward migration.
The United States Department of Agriculture-National Animal Health Monitoring System (USDA-NAHMS) conducted a survey of 2,545 preweaned heifer calves across 104 dairy operations in 2014. The study, which took place in 13 states over 18 months, covered a large cross-section of management of preweaned heifer calves in the United States, and the results have been published in six new articles in the October issue of the Journal of Dairy Science.
Despite many decades of annual brook trout stocking in one northcentral Pennsylvania watershed, the wild brook trout populations show few genes from hatchery fish, according to researchers who genotyped about 2,000 brook trout in Loyalsock Creek watershed, a 500-square-mile drainage in Lycoming and Sullivan counties celebrated by anglers for its trout fishing.
These gentle giants, which can grow up to 10 m in length, have been recorded jumping out of the water as high and as fast as great white sharks. Marine biologists are unsure why they do this, but have pointed to this phenomenon as evidence of how much we still have to learn about marine life.
Traditional artisanal fishing has been harmed by EU fishing policies that favor big businesses and ignores other more sustainable approaches to conserving fish stocks, according to new research from the University of Kent. This is the main finding of research by Dr. Alicia Said, Professor Douglas MacMillan, and Dr Joseph Tzanopoulos of the School of Anthropology and Conservation (SAC) published in the world-leading open-access journal Frontiers in Marine Sciences.
Dolphins swim, horses gallop, and humans walk on two legs -- mammals are able to move in lots of different ways. That's because we have unique backbones. And scientists exploring how mammals' backbones evolved have discovered that the key to our complex spines lies in mammals' flexible shoulders.
For the first time, a praying mantis is recorded to fish. For five days in a row, an adult male was observed hunting and devouring a total of nine guppies from a pond located in a private roof garden in Karnataka, India. Apart from demonstrating such repetitive behaviour, the event is remarkable in the fact that it occurred naturally, without external interference. The phenomenon is described in the open access Journal of Orthoptera Research.
A new study published in the journal River Research and Applications provides insight into the magnitude of the effect this waterfall has on endangered fishes in the San Juan River. From 2015-2017 more than 1,000 razorback sucker and dozens of Colorado pikeminnow were detected downstream of the waterfall. Some fish moved to this location from up to 600 miles away in the Colorado River.