Infidelity produces faster sperms
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...
View ArticleGenetic conflict in fish led to evolution of new sex chromosomes
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...
View ArticleFish study turns colour vision theory inside out
(PhysOrg.com) -- Neurobiologists at the Queensland Brain Institute have found that animals are not always as brightly coloured as they seem - at least not to their counterparts.
View ArticleAquarium fishes are more aggressive in reduced environments, a new study finds
An angry glare from the family goldfish might not be the result of a missed meal, but a too-humble abode. Fish in a cramped, barren space turn mean, a study from Case Western Reserve University has...
View ArticleA new fish species from Lake Victoria named in honor of the author of...
Two new species of cichlid fish from Lake Victoria are described by biologists from Naturalis Biodiversity Center (Research Department Marine Zoology) and the Institute of Biology Leiden (Section...
View ArticleFrom flounders to seahorses: Evolutionary success of spiny-rayed fishes detailed
(Phys.org) —Even as the dinosaurs were becoming extinct 66 million years ago, the ancient ancestor of spiny-rayed fishes flourished, eventually giving rise to tens of thousands of species that can now...
View ArticleHormones may help tiny African fish climb social ladder
Want to work your way up the corporate or social ladder?
View ArticleLopsided fish show that symmetry is only skin deep
Putting function before form, members of the Perissodinus genus of fish have developed a hugely lopsided jaw that provides a distinct feeding advantage. Research published in the open access journal...
View ArticleFish facing reflections become feisty but fearful
Fish become feisty but fearful when facing themselves in a mirror, according to two Stanford biologists.
View ArticleFemale fish abandoned by males to raise offspring on their own
Caring for children can be a tough job, particularly if you are a female cichlid fish.
View ArticleFemale fish -- and humans? -- lose interest when their male loses a slugfest
You may think of your love for your mate as the noble emotion of a pure heart, but some primitive parts of your brain are taking a decidedly more pragmatic approach to the subject, according to...
View ArticleMale African cichlid fish go from 'zero to 60' when mating calls, researchers...
(PhysOrg.com) -- In African cichlid fish society, only the dominant male reproduces. But Stanford researchers have found that if the dominant male disappears, a subordinate cichlid can rise to the...
View ArticleB chromosomes affect sex determination in cichlid fishes
B chromosomes have a functional effect on sex determination in a species of cichlid fishes from Lake Victoria, according to a study by Japanese researchers to be published in open-access journal PLoS...
View ArticlePaternity of subordinates raises cooperative effort in cichlids
Cichlid male nannies help out, especially if they've been sneaking.
View ArticleCichlid fish: How does the swim bladder affect hearing?
In bony fish the swim bladder primarily serves for buoyancy Moreover, in many species it also possesses acoustic functions: it plays a role in sound production and improves hearing in numerous ways....
View ArticleWhy are there so many species of beetles and so few crocodiles?
There are more than 400,000 species of beetles and only two species of the tuatara, a reptile cousin of snakes and lizards that lives in New Zealand. Crocodiles and alligators, while nearly 250 million...
View ArticleInfrared vision in a cichlid fish
Biologists from the University of Bonn have discovered that the cichlid fish Pelvicachromis taeniatus can see in the near infrared range; this was thought to be unlikely until now. Seeing in the...
View ArticleEnvironmental factors determine whether immigrants are accepted by...
Cichlid fish are more likely to accept immigrants into their group when they are under threat from predators and need reinforcements, new research shows. The researcher suggests that there are...
View ArticleRisk management in fish: How cichlids prevent their young from being eaten
For a variety of reasons, many humans choose to adopt children. More surprisingly, adoption is fairly widespread in the animal kingdom, even though it would seem to counteract the basic premise of...
View ArticleDisappearing nannies force parents to accept their duties
(Phys.org) —Large helpers (nannies) in a cichlid fish allow the dominant male and female to reduce their personal contribution to their offspring and territory, according to new research published...
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