News tagged with cichlid
Bigger and bossier better for fish families
Dec 14, 2009 |
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(PhysOrg.com) -- If you are spending the holidays with big Uncle Frank or bossy Aunt Minnie and wondering whether you would be better off with another family, spare a thought for the humble cichlid fish.
The importance of being helpful -- Cooperative cichlids boost their own reproductive success
May 15, 2009 |
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Subordinate individuals living within a group of vertebrates sometimes assist a more dominant pair by helping to raise the dominant pair's offspring and this has been shown to occur among subordinate female ...
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Gene in male fish lures females into sex
Biology /
Nov 15, 2007 |
4.7 / 5 (6) |
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A gene has been found in male cichlid fish that evolved to lure female fish so that male cichlids can deposit sperm in the females mouths. A study in the online open access journal BMC Biology reveals that ...
Genetic conflict in fish led to evolution of new sex chromosomes
Oct 01, 2009 |
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University of Maryland biologists have genetically mapped the sex chromosomes of several species of cichlid (pronounced "sick-lid") fish from Lake Malawi, East Africa, and identified a mechanism by which new ...
Adaptation to parasites drive African fishes along different evolutionary paths
Biology /
Aug 15, 2007 |
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An international team of scientists from Canada (Université Laval), the U.K. (University of Hull, Cardiff University) and Spain (Doňana Biological Station), have discovered that a pair of closely related species of East African ...
Choosy females make colourful males
Biology /
May 09, 2006 |
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Female fish prefer brightly coloured males because they are easier to see and are in better shape concludes Dutch researcher Martine Maan following her study of fish speciation in the East African Lakes. Environmental variation ...
'Great speciators' explained: It's intrinsic
Biology /
Jan 26, 2009 |
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New molecular research shows that birds within the family Zosteropidae—named white eyes for the feathers that frame their eyes—form new species at a faster rate than any other known bird. Remarkably, unlike ...
Infidelity produces faster sperms
Biology /
Jan 20, 2009 |
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Until now, it has been difficult to prove that fast-swimming sperms have an advantage when it comes to fertilizing an egg. But now a research team at Uppsala University can demonstrate that unfaithful females of the cichlid ...
For some species, an upside to inbreeding
Biology /
Feb 05, 2007 |
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Although breeding between close kin is thought to be generally unfavorable from an evolutionary standpoint, in part because harmful mutations are more easily propagated through populations in this way, theory predicts that ...
Females decide whether ambitious males float or flounder
Biology /
Jan 30, 2008 |
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Aggression, testosterone and nepotism don’t necessarily help one climb the social ladder, but the support of a good female can, according to new research on the social habits of an unusual African species of fish.
Changes to Embryo Can Elicit Change in Adult
Nov 08, 2005 |
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In a study illustrating the apparent linkages between the evolutionary development and embryonic development of species, researchers have uncovered the genetic elements that determine the structure and function of a simple ...
Fish researcher demonstrates first 'non-visual feeding' by African cichlids
Apr 13, 2009 |
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Most fish rely primarily on their vision to find prey to feed upon, but a University of Rhode Island biologist and her colleagues have demonstrated that a group of African cichlids feeds by using its lateral line sensory ...
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