Sentences with phrase «number of animal species»

The planet is host to a vast number of animal species, many of which we're just discovering now.

So, we would reduce the number of animal species, replace live plants with plastic, and so on, until we had a workable tank that would please the client and have a reasonable shot at staying stable for awhile.

Coccidia are a group of protozoan parasites that are extremely common and which infect a wide number of animal species, including dogs, cats, horses, cattle, goats, sheep and chickens — and many other species of animals, as well.

When the overall number of animal species is lower, this favors smaller species with a lower body mass.

Nearly 150 years ago, the famed naturalist Alfred Russell Wallace noted that range boundaries for a number of animal species in the Amazonian rain forest seemed to coincide with the region's many rivers.

Not exact matches

It follows that, if the discrepancy between the number of possible states and the number of possible samples is large enough, we can assert without fear of contradiction that no two members of a class, e.g., no two members of an animal or plant species, not even two bacteria, can ever be in the same internal state.

It is a documented fact that animal agriculture, or trying to sustain an animal based diet globally is the leading cause of environmental destruction, species extinction, and with other unhealthy food, the number one cause of illness globally.

In response to these pressures, the number of wild animal species is dropping, but the Fish and Wildlife Service's annual budget for killing and poisoning rises inversely in magnificent adherence to Parkinson's Law.

A number of different animals have been hunted with dogs, including foxes, deer, hares and mink, with each quarry species hunted in a different way.

It will wipe out huge numbers of this much - loved species, virtually eliminating badgers from these areas, including many animals which are healthy.

Computer models suggested that the hotspots are optimal sites for no - fishing zones because they contain many species, but lower numbers of animals than elsewhere, perhaps because of competition between species.

On 22 November, the census updated its record of animals living between the depths of 200 metres and 5000 metres, bringing the number of known marine species living in darkness to 17,650.

«It seems to me that when it comes to animals and especially animal fossils, that biologists are always looking to maximize the number of species,» online reader Mark S. wrote.

When on the low - fiber diet, animals showed a decrease in the diversity of their microbiome, with 60 percent of the bacteria species plummeting in numbers compared with their high - fiber friends.

So far, biologists have described and catalogued about 1.5 million animal species, a number that many think might be eclipsed by the number of species still awaiting discovery.

Again and again, animals of various species domesticated at different times in different parts of the world develop the same domestication syndrome characteristics: more extensive breeding periods; smaller brains, hearts and teeth; small or floppy ears; spotted coats; curly hair and tails; variable numbers of vertebrae in the spine; and juvenile faces with shorter snouts.

Comparing brain size and number of nerve cells in the cerebral cortex among several animal species revealed some surprises.

Many of the animals phyla that are losers in terms of present - day species numbers tend to be in the ocean, and because of human activity, they may go completely extinct.»

Animals have incredible variation in their body shapes and ways of life, including the plant - like, immobile marine sponges that lack heads, eyes, limbs and complex organs, parasitic worms that live inside other organisms (e.g. nematodes, platyhelminths), and phyla with eyes, skeletons, limbs and complex organs that dominate the land in terms of species numbers (arthropods) and body size (chordates).

It was observed on virtually every continent, although a particularly large number of animals became extinct in North and South America, where species including sabre - toothed cats, mastodons, giant sloths and giant armadillos disappeared, and in Australia, which lost animals such as giant kangaroos, giant wombats and marsupial lions.

«This is because plant and animal pest numbers and vigour could increase under changed climatic conditions and at the same time impact on the persistence of native species.»

A new study by University of Arizona biologists helps explain why different groups of animals differ dramatically in their number of species, and how this is related to differences in their body forms and ways of life.

The brightly colored animals came to scientific attention only because they were living as pets in small riverbank settlements — suggesting that the number of undiscovered species in the Amazon basin is even greater than scientists suspect.

The finding, experts say, has implications for conservation management, which often solely focuses on the number of animals in a population, and may extend to chimpanzees, dolphins, whales, and other species.

«Under geological aspects, the small number of so few large animal species presents an anomaly,» explains Professor Dr. Hervé Bocherens of the Senckenberg Center for Human Evolution and Palaeoenvironment at the University of Tübingen, and he continues, «The most prominent example of prehistoric giants is, of course, the dinosaurs.»

The extinction that ended the Devonian Era 359 million years ago created opportunities quickly exploited by a formerly rare and unremarkable group of fish that went on to become — in terms of the sheer number of species — the most successful vertebrates (backboned animals) on the planet today: the ray - finned fish.

Another important finding, Dunn and his colleagues report, was how these two body measures are related to the number of males in a howler monkey's immediate social group, which ranges from one to three animals depending on the species.

Mostly the animals are lone escapees, but a number of species — especially reptiles — have gone loose often enough that they've formed free - roaming populations that reproduce amid the imported mango groves and ornamental hedgerows.

Yet, according to a new study involving 147 cities worldwide, surprisingly high numbers of plant and animal species persist and even flourish in urban environments — to the tune of hundreds of bird species and thousands of plant species in a single city.

«While urbanization has caused cities to lose large numbers of plants and animals, the good news is that cities still retain endemic native species, which opens the door for new policies on regional and global biodiversity conservation,» said lead author and NCEAS working group member Myla F. J. Aronson, a research scientist in the Department of Ecology, Evolution and Natural Resources at Rutgers, The State University of New Jersey.

Many live freely in the soil or water, but there are also a large number of species that live as parasites on plants or animals and even some that feed on mold.

The review's sole author, Dr. Patricia Lopes from the Institute of Evolutionary Biology and Environmental Studies at the University of Zurich, says that animals from a number of different species will eat and drink less, reduce their activity and sleep more when they are sick in order to conserve energy for their recovery.

This domino effect is a particular threat to animal species that only interact with a small number of plant species, since they are more sensitive to climate change than generalists.

In a paper currently in review at the journal Oryx Hamburg University zoologist Jrg Ganzhorn and his colleagues report that at least three of Madagascars unique ecosystems have sustained so much damage that many of the resident large animal species, including a number of lemurs, have disappeared from them.

We always held the number of species constant, but made changes to the roles each animal played as well as the links between predators and their prey.»

«This particular sponge species, which is among the most ancient animals inhabiting the earth today, is home to a very diverse, very crowded number of microorganisms,» said Prof. Micha Ilan of the Department of Zoology at TAU's Faculty of Life Sciences, who led the study.

Growing concern over the dwindling number of plant and animal species has led to a hunt for ways to save them, and in the past decade, the idea of maintaining wildlife corridors — strips of land to connect these sanctuaries — has become popular among conservationists.

The team looked at an outer surface protein of B. burgdorferi found in ticks — which can give clues about the vertebrate host — as well as the probabilities that different host species transmit the microbe during a tick bite, the number of larvae feeding on the animals, and population densities.

Growing numbers of ships in the Arctic could also exacerbate the problem of invasive species, foreign plants and animals that enter and often take over ecosystems.

Using a mathematical model that combines a huge number of cattle and badgers that have TB, the researchers were able to quantify the relationship between the two animals and use a big data approach to show that the route of infection for cattle is from other cattle rather than from other species.

Story number 1: A couple of species of animal have been found that purposefully seek out food containing alcohol.

A new estimate, based on mathematical modeling and a major bug - counting effort in New Guinea, puts the number of arthropod species in the tropics — which account for most of the animal species in the world — at about 3.7 million, way below the 30 million once suggested.

The use of the touchscreen presents a controlled setting to test cognitive capacities in animals and has already successfully been used in a number of species.

The global crisis for endangered species is more serious than the financial meltdown, with numbers of imperiled animals and plants rising at record rates, scientists are warning in a report released today.

Zoo veterinarians have been attempting, with varying degrees of success, to castrate the 2 - ton animals for more than 90 years, in hopes of controlling the size of captive populations and reducing the number of fights between the males of this aggressive species.

Population data on the animals is incomplete, so their true conservation status is unknown, but their numbers are far smaller than many common marine species of dolphins, whose populations are composed of hundreds of thousands of individuals.

A study comprising over 80 forests in Germany and on Sumatra (Indonesia) has now shown that two factors particularly influence this function when examined over larger landscapes: the number of animals and their species diversity.

«Our findings show that the functioning of natural and complex ecosystems is ultimately determined by simple relationships: the higher the number of individual animals and the higher the species richness, the better the system functions.»

Writing in the June 2017 issue of Trends in Cognitive Sciences, Nunez takes on the conventional wisdom in the field right now — a widely accepted view in cognitive neuroscience, child psychology and animal cognition that there is a biologically evolved capacity for number and arithmetic that we share with other species.

But the conversion of tropical forests to oil palm plantations has devastated a huge number of plant and animal species, including tigers, elephants, rhinos and orangutans.