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Does it pay to be a lover or a fighter? It depends on how you woo females

By Guest PostJanuary 28, 2014Natureanimal, canine teeth, control of females, fall, fighter scale, john fitzpatrick, lover, male mammals, mating, new york, primates, sexual behaviours, sperm, stefan luepold, syracuse university, university, university of manchester, western australia

As mating season approaches, male animals are faced with a question that can make or break their chances at reproducing: does it pay to be a lover or a fighter? Or both?

Researchers from The University of Manchester and Syracuse University in New York working with the University of Western Australia, found that where animals fall on the lover/fighter scale depends on how much they are able to ensure continued mating rights with females.

In species where fighting for the right to mate means greater control of females, such as in the elephant seal, males invest more in weapons and less in testes size. (more…)

Size of Lunch Dictates Force of Crunch

By Guest PostFebruary 19, 2013Science3d, animal, animal bite force, animated computer model, biology letters, bite, bite strength relationship, brown university, co evolving foods, crush, crushing device, daily sustenance, ecology and evolution, ecosystem, elizabeth brainerd, eric lopresti, force, humans, jaw, length force relationship, maximum force, measure, muscle, muscle length, nicholas gidmark, nicolai konow, optimal value, phenomenon of physiology, piston activated, population, predators and prey, prey sizes, species, variable bite force, x ray markers, xray videos

Even in the same animal, not all bites are the same. A new study finds that because the force in a muscle depends on how much it is stretched, an animal’s bite force depends on the size of what it is biting. The finding has direct implications for ecology and evolution.

PROVIDENCE, R.I. [Brown University] — Many animals prefer food — snails, nuts, etc. — that must be cracked and crushed. Scientists have measured the maximum force of their impressive bites before, but a new study introduces a significant subtlety: bite force depends not only on the size and strength of the eater, but also the size of the eatee. That insight has important implications in the lives of predators and prey. (more…)

Collaring Tapirs – Elephant look-alikes – to Help Them Survive

By Guest PostNovember 19, 2012Natureagricultural community, animal, bairds tapir, camera trapping, central, cow, crops, elephant look alike, endangered species, Environment, farmer, gerald urquhart, gps collar, lyman briggs college, michigan state university, monitor, movement, nicaragua, project, rainforest, seed dispersal, south america, wildlife

EAST LANSING, Mich. — A team of Michigan State University researchers will soon be heading into the rainforests of Nicaragua to help an endangered species known as a Baird’s tapir co-exist with local farmers whose crops are being threatened by the animals.

The animals were thought to be extinct in that part of the world until just two years ago when the MSU team discovered them still living there through the use of “camera trapping” – the setting up of still and video cameras in order to “capture” the animal. (more…)

Microbes Help Hyenas Communicate via Scent

By Guest PostSeptember 2, 2012Natureage, animal, animal behavior, bacteria, beneficial relationship, chemical signature, communication, communication system, diversity, DNA, hyena, hyena clan, kay holekamp, kenyan plains, kevin theis, key controller, mammal, michigan state university, microbial community, reproductive status, scent gland, sex, symbiotic bacteria, trait

EAST LANSING, Mich. — Bacteria in hyenas’ scent glands may be the key controllers of communication.

The results, featured in the current issue of Scientific Reports, show a clear relationship between the diversity of hyena clans and the distinct microbial communities that reside in their scent glands, said Kevin Theis, the paper’s lead author and Michigan State University postdoctoral researcher.

“A critical component of every animal’s behavioral repertoire is an effective communication system,” said Theis, who co-authored the study with Kay Holekamp, MSU zoologist. “It is possible that without their bacteria, many animals couldn’t ‘say’ much at all.” (more…)

University of Toronto/Royal Ontario Museum Scientists Discover Unusual ‘Tulip’ Creature

By Guest PostJanuary 20, 2012Nature, Scienceanimal, bizarre creature, burgess shale, burgess shale animals, calyx, canadian rockies, cup like structure, filter feeding system, fossil, fossil specimens, invertebrate palaeontology, jean bernard caron, lorna obrien, middle cambrian burgess shale, mount stephen, ocean, parks canada, primitive members, royal ontario museum, seafloor, siphusauctum gregarium, stem, tulip beds, UNESCO, university of toronto

*Lived in the ocean more than 500-million years ago*

A bizarre creature that lived in the ocean more than 500-million years ago has emerged from the famous Middle Cambrian Burgess Shale in the Canadian Rockies.

Officially named Siphusauctum gregarium, fossils reveal a tulip-shaped creature that is about the length of a dinner knife (approximately 20 centimetres) and has a unique filter feeding system. (more…)

Mutated Gene Found in Dog Disease the Same in Humans, MU Researchers Find

By Guest PostApril 24, 2011Scienceanimal, cell function, columbia, dennis o’brien, dna test, fabiana farias, gary johnson, gene mutation, human neurological disorder, lynn steinhaus, man, martin katz, ncl, neuronal ceroid-lipofuscinosis, parkinson disease, seizures, tibetan terrier dogs, university of missouri

*Tibetian Terrier dogs could play key role in developing therapy for early-onset Parkinson’s*

COLUMBIA, Mo. – University of Missouri researchers believe both man and animal will benefit from their discovery that the same gene mutation found in Tibetan Terrier dogs can also be found in a fatal human neurological disorder related to Parkinson’s disease.

Fabiana Farias, a doctoral candidate in Area Genetics at the University of Missouri, found the mutation as part of her thesis research. Gary Johnson, associate professor of Veterinary Pathobiology; Martin Katz, professor of Veterinary Pathobiology, and Dennis O’Brien, a professor in the Department of Veterinary Medicine and Surgery, along with a host of researchers from MU’s College of Veterinary Medicine; College of Agriculture, Food and Natural Resources (CAFNR) and the Mason Eye Institute, recently published the findings in Neurobiology of Disease. (more…)

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