Showing posts with label external threat. Show all posts
Showing posts with label external threat. Show all posts

Thursday, 4 June 2015

A smelling bee? Deadly mite would be a favorite to win

Date: June 3, 2015
Source: Michigan State University
Summary: If there were an international smelling bee, a deadly mite would be a favorite to win. New research has revealed that Varroa mites, the most-serious threat to honeybees worldwide, are infiltrating hives by smelling like bees.

The Michigan State University-led study, appearing in the current issue of Biology Letters, shows that being able to smell like their hostess reduces the chance that the parasite is found and killed.

The parasites were originally found on Asian honeybees. The invasive species, however, revealed their versatility when they began infesting and killing European honeybees.

"The mites from Asian honeybees, or the original host, are more efficient in mimicking both Asian and European honeybees," said Zachary Huang, MSU entomologist and one of the papers' lead authors. "This remarkable adaptability may explain their relatively recent host shift from Asian to European honeybees."

Monday, 26 November 2012

Pilot Whales Use Synchronized Swimming When They Sense Danger

ScienceDaily (Nov. 23, 2012) — An international team of scientists have observed the behavior of various groups of cetaceans in the Strait of Gibraltar and Cape Breton in Canada belonging to the Globicephala melas species, which are also known as long-finned pilot whales. These results show that these whales use synchronized swimming when they identify the presence of an external threat.
There are 300 pilot whales inhabiting the Straight of Gibraltar. Here these cetaceans remain throughout the entire year in the water of the Mediterranean and the Atlantic. But, little is known about their social structure.

Headed by the University of Aberdeen (United Kingdom) in collaboration with the DoƱana Biological Station (CSIC) and Conservation, Information and Study on Cetaceans (CIRCE) group, the study analyzed the patterns of association between individuals within this whale community. The aim was to provide a long-term vision of their social system.


Continued: http://www.sciencedaily.com/releases/2012/11/121123092740.htm

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