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Tag: "territorial" at biology news

In young mice, gregariousness seems to reside in the genes

... of behaviors associated with sexual reproduction, territorial defense and parental care. Those studies, say Lahvis and Panksepp, do not account for the many forms of social interaction that occur prior to sexual maturity, nor do they account for the many kinds of social groupings that occur throughout the anima...

Male owls pitch their hoots to advertise body weight to competitors

...nalyzed several hundreds of hoots recorded from 17 territorial males and demonstrated that the pitch of the vocal...s information is actually used by male owls during territorial interactions, the authors conducted a series of playback experiments (commonly used in studies of an...

Long-lived deep-sea fishes imperiled by technology, overfishing

...lines and protections ?unlike within United States territorial waters. Most of these fish are caught by deep trawlers near seamounts, where they congregate because of food. Technological advances have made targeting these fish easier, the panelists pointed out, because powerful ships can drag huge nets hundre...

Turtles are loyal in feeding as well as in breeding

...s evolved, but it is possible that sea turtles are territorial or are responding to limited food resources by sticking to their own feeding patches. 'There are estimated to be as few as 300 female green turtles breeding annually in the Mediterranean,' continued Dr Broderick. 'This new information is timely a...

Fish can determine their social rank by observation alone, study finds

...to weakest, simply by watching how they perform in territorial fights with other males, according to a new study ... unique experiment with cichlids (SIK-lids), small territorial fish from Africa. "In their natural habitat, male cichlids are constantly trying to ascend socially ...

Invasive ants territorial when neighbors are not kin

... Ecology, the biologists provide the first data on territorial interactions among Argentine ants in the field. I... from different supercolonies occur commonly along territorial borders." The distance between nests did not play a role in ants' territorial behavior. Nor were ...

British cattle give TB to badgers, finds UC Davis expert

...in badger had doubled. "Culling disrupts badgers' territorial behavior so they travel further and interact with more other badgers; that is probably why disease spreads more rapidly," said Woodroffe, the leader of a team which also included researchers from Britain's Central Science Laboratory and Veterinary La...

Fire ants: Their true story told by the scientist who loves them

...ew dozen to several hundred thousand of the highly territorial critters (Tschinkel has counted them but says it's not easy). A mature colony can encompass approximately 300 feet of underground foraging tunnels ?about 20,000 ant body-lengths. On a human scale, that's the staggering equivalent of 20 miles or more....

Expedition discovers marine treasures

... that wait at the atoll to avoid anchoring fees in territorial waters of St. Eustatius. The large ships also endanger local fishermen of Saba in their small boats, forcing them away from traditional fishing grounds and causing the loss of fish pots that become so-called ''ghost traps" that harm fish stocks. Le...

Frog’s ear canal may provide insights for understanding human hearing loss

...ced in its surroundings so that it can communicate territorial information to other males of its species. In addition to helping researchers understand how the ear evolved, the research may one day enable scientists to develop new strategies or technologies that help people to hear in environments where there is...

Olfactory system detects pheromones that control reproduction

...reprogrammed mating, social ranking, maternal, and territorial defense behaviors. In their experiments, Dulac and her colleagues sought to determine whether sensory neurons in the main olfactory epithelium and the VNO were connected to neurons in the brain that synthesize luteinizing hormone releasing hormone (...

Envisat radar surveillance protects endangered prehistoric fish

...t ecosystems and stamp French sovereignty on their territorial waters. A surveillance system using French naval vessels has achieved some success, however the number of vessels fishing illegally continued to rise, and they proved adept at slipping through the surveillance net. The EEZ totals nearby one million...

Weapon performance determines mating success in the collared lizard

In territorial species with polygynous mating systems, reproductive success reflects phenotypic variation. At the gross level, such phenotypic variation can include that of body size and weapon morphology, as well as of weapon function and performance. In a study ...

Monkeys understand numbers across senses

...know how many animals there are. For example, in a territorial dispute, you could imagine that an animal would want to know, 'Well, how many animals are really about to encroach on our territory?'" Also, said Brannon, the researchers chose to test each monkey only once and not reward them in any way. This exper...

A Father’s Day Gift: Free DNA Paternity Testing

...m, but almost Bioprospecting in the seabed within territorial limits is currently regulated by the UN Convention on the Law of the Sea (UNCLOS), which determines states' jurisdiction, rights and obligations in the oceans, as well as in the Convention on Biological Diversity, which governs access to genetic reso...

Clear rules needed to govern deep sea bioprospecting: UNU

...m, but almost Bioprospecting in the seabed within territorial limits is currently regulated by the UN Convention on the Law of the Sea (UNCLOS), which determines states' jurisdiction, rights and obligations in the oceans, as well as in the Convention on Biological Diversity, which governs access to genetic reso...

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