Sentences with phrase «cichlid in»

There are over 250 species of cichlid in the lake: their presence seems to have blinded biologists to other examples of evolution in action occurring there.

A cichlid in Africa's Lake Tanganyika uses patterns of facial stripes to distinguish individuals and keep tabs on them

Over a remarkably short period, cichlids in the African great lakes have spawned hundreds of new species, with an enormous range of characteristics.

The basin now occupied by Lake Tanganyika came into being at least 5.5 million years ago, and it has been assumed that the species radiation that gave rise to the striking diversity of cichlids in the lake was triggered by its formation.

As perhaps with any social creature, Fischer points out that higher social competence and the ability to conform to social hierarchies may well stand the cichlids in good stead in later life:

In the article, the evolutionary and fish biologists Matt McGee and Ole Seehausen report that, because of a specialized jaw structure, fish - eating cichlids in Africa's largest lake take a long time to swallow their prey and are thus no match for competitors that can feed much more rapidly.

The costs of specialization are highlighted in an article published this week in Science on fish - eating cichlids in Lake Victoria which became extinct following the proliferation of the Nile perch, introduced around 60 years ago.

The experts preserved the cichlids in alcohol at the Naturalis Biodiversity Center in Leiden.

The 20 - gallon is just big enough that people will try to keep larger cichlids in it.

Not exact matches

The first cichlid was described in 1864 after a botanist on one of David Livingstone's expeditions sent back some dried skins to the Natural History Museum in London for identification.

Most species of cichlid live in three lakes in Africa's Great Rift Valley.

If our estimates are correct, there could be twice as many cichlid species in these three lakes as there are freshwater fish in the whole of Europe and North America.

«I don't necessarily care what the taxonomic rank would be of the units I'm studying,» says Hey, whose current research involves cichlid fish in Lake Malawi.

Neolamprologus obscurus is a highly sociable species of cichlid found only in the southern reaches of Lake Tanyanika.

African cichlids, whose visual systems are well studied, evolved in fairly clear, calm, blue lakes with plenty of sunlight.

When researchers placed African cichlid fish in a tank, the fish showed identical aggressive behavior whether their opponent was their reflection or another fish across a clear barrier, ramming and biting at both.

Moreover, the results are consistent with molecular genetic data relating to the ongoing diversification of the family in the Great Lakes region of East Africa, which have indicated that hybridization between members of related species or even genera has played a major role in cichlid speciation.

But the Lake Victoria cichlids far surpass Darwin's finches in the astonishing speed with which they diversified: the more than 500 species that live there and only there today all evolved within the past 15,000 to 10,000 years — an eyeblink in geologic terms — compared with the 14 finch species that evolved over several million years.

Like Charles Darwin's famous finches, which evolved a wide range of beak shapes and sizes to exploit the different foods available in the Galápagos Islands, these cichlids represent a textbook example of what biologists term an adaptive radiation — the phenomenon whereby one lineage spawns numerous species that evolve specializations to an array of ecological roles.

«Our fossil supports the hypothesis that hybridizations played a more prominent role in cichlid speciation than was once thought — and that diversification of the cichlids now endemic to the lake did not begin in the lake itself,» Reichenbacher says.

Now scientists around Ludwig - Maximilians - Universitaet (LMU) in Munich paleontologist Professor Bettina Reichenbacher have described a new fossil cichlid discovered in Upper Miocene strata in East Africa, which provides new insights into the evolutionary history of the group.

«This combination of characters is particularly interesting, because molecular geneticists have shown that many of the cichlid species in Lake Tanganyika possess «mosaic» genomes — made up of genetic material derived from non-related species.

The new fossil displays a striking «mosaic - like» set of characters, combining traits that are typical for three distinct cichlid groups found in Lake Tanganyika today.

However, in cooperation with Dr. Ulrich Schliewen (Zoological State Collections, Munich), Reichenbacher and her team have assembled a unique database on the morphology of present - day cichlids, in which all the lineages found in Lake Tanganyika are represented.

Chernoff has compiled a staggering collection so far, including, at top left, collection jars used to maintain specimens in alcohol; facing right and up, two red - eyed piranhas; far right, a fish head and the skin of an Arapaima gigas, South America's largest freshwater fish; across the bottom, cichlid, tetra, and aruanã skeletons.

With a graduate student, Kapa Lenkov, Fernald tested this directly in cichlids raised in his Stanford lab.

A new study shows that cichlid fish reared in larger social groups from birth display a greater and more extensive range of social interactions, which continues into the later life of the fish.

Fernald studies Astatotilapia burtoni, one of the hundreds of cichlid fish species inhabiting Lake Tanganyika in eastern Africa, because of the unique ways they have evolved over time.

In a study published in PLoS ONE, researchers from Stanford report that social status in cichlid fish may be regulated by DNA methylatioIn a study published in PLoS ONE, researchers from Stanford report that social status in cichlid fish may be regulated by DNA methylatioin PLoS ONE, researchers from Stanford report that social status in cichlid fish may be regulated by DNA methylatioin cichlid fish may be regulated by DNA methylation.

For the study, published this week in the journal The American Naturalist, researchers used the Neolamprologus pulcher (N. Pulcher) breed of cichlid, primarily found in Lake Tanganyika — the great African freshwater lake that feeds into the Congo River.

The angelfish (Pterophyllum scalare) is a colorful cichlid native to the Amazon Basin, but is now found in aquariums around the world because of its popularity in the pet trade.

«In each of the two crater lakes new species of the Midas cichlid evolved with an elongated body — a phenotype that does not exist in ancestral lakes from which the colonisers of crater lakes came from,» explains MeyeIn each of the two crater lakes new species of the Midas cichlid evolved with an elongated body — a phenotype that does not exist in ancestral lakes from which the colonisers of crater lakes came from,» explains Meyein ancestral lakes from which the colonisers of crater lakes came from,» explains Meyer.

The secret to the unique diversity of Lake Malawi's cichlid fish may be down to huge variations in climate and water levels over the years

Konstanz evolutionary biologists working with Prof. Axel Meyer have now described parallel evolution of two closely related, but geographically isolated populations of cichlid fish in Nicaraguan crater lakes.

«Evolutionary biologists observe parallel, repeated evolution of cichlid fish in Nicaragua.»

Richard Francis and his colleagues at the University of Oregon in Eugene and the University of Washington in Seattle studied a species of cichlid fish found in Lake Tanganyika.

In a 2014 paper, Burghardt and his colleagues from the University of Tennessee and the Smithsonian National Zoological Park described how three cichlid fish played with a thermometer in their tank, bouncing the «toy» repeatedlIn a 2014 paper, Burghardt and his colleagues from the University of Tennessee and the Smithsonian National Zoological Park described how three cichlid fish played with a thermometer in their tank, bouncing the «toy» repeatedlin their tank, bouncing the «toy» repeatedly.

«When cichlids fall prey to a predator, alarm substances are released,» explains Dr. Denis Meuthen, who has since moved to the University of Saskatchewan in Canada.

The reason for this may be a consequence of the way of life of this cichlid species: The females deposit their eggs in breeding caves and care for them intensively.

«Cichlids: Paler in the face of the enemy: In a threatening environment, male cichlids delay the development of their striking colorCichlids: Paler in the face of the enemy: In a threatening environment, male cichlids delay the development of their striking color.&raquin the face of the enemy: In a threatening environment, male cichlids delay the development of their striking color.&raquIn a threatening environment, male cichlids delay the development of their striking colorcichlids delay the development of their striking color.»

The African cichlid Pelvicachromis taeniatus certainly boasts magnificent coloration: In the females, a purple belly and a blue - green shimmering side stripe signal the onset of sexual maturity.

Other fish in Africa, such as populations of cichlids, are being eliminated due to changing agricultural practices.

George Turner, an evolutionary biologist and self - described «cichlid nerd» at Bangor University in the United Kingdom, says the study is well done.

Baby cichlid fish masquerade as snails with mother luring more snails in, which allows the mother to spend less time chasing away predators

18 By studying these cichlids, scientists in Tennessee and Georgia have identified the master set of genes that regulate the construction of all teeth in the animal kingdom.

The researchers concluded it wasn't likely that so many cichlid fossils remain undiscovered: The cichlids» fossil records would have to be 10 to 30 times worse in the older time period than in more recent times — an unlikely scenario, Friedman says.

Matt Friedman, a paleobiologist at the University of Oxford in the United Kingdom, thought he could estimate just how likely it was that there are more ancient cichlid fossils out there.

A new study casts doubt on an old hypothesis, that cichlids reached multiple continents by swimming in place while an ancient supercontinent split up.

More than 1600 species of cichlids swim in fresh water around the world, spanning a rainbow of colors and a myriad of shapes.

Lamprologus is a cichlid, one of the most diverse animal groups in existence, despite being mostly confined to three large lakes in Africa.