In a number of species,males and females have different ecological roles and therefore might be required to solve different problems.Studies on humans have suggested that the 2 sexes often show different efficiencies in problem solving tasks;similarly,evidence of sex differences has been found in 2...
The meaning of GUPPY is a small bony fish (Poecilia reticulata of the family Poeciliidae) especially of Barbados, Trinidad, and Venezuela that is a live-bearer and is often kept as an aquarium fish.
Adult male guppies reach a size of approximately 1.2 inches and adult female guppies reach a size of about 2.4-2.5 inches. It is best to keep at least 2-3 females per each male because male guppies often harass the females. Plants are also good so that the female has plenty of hiding ...
Researchers at the University of California, Los Angeles (UCLA) learned that female guppies are drawn strongly to males with intermediate levels of drosopterins; so females desire males with the orange patches. Even when the females were presented with a wider variety of colors, they chose orange...
(Phys.org) —It's not always easy to tell if a fish is male or female: they look more or less the same. But there are exceptions, such as guppies and, as with humans, guppy genitalia varies in size across the species. But while male genitalia are necessary to transfer sperm, why ...
This study examined the effects of female choice and male-male competition on male mating success in the guppy, Poecilia reticulata. The fraction of a male's displays that elicited a sexual response from a female was used as a measure of relative female preference for that male. Male mating ...
所有类型孔雀鱼的理想佳肴,促进它们发挥最自然的美。 5. Likeguppies, male crickets compete for female favour-though by virtuoso chirping, rather than visual displays. 像孔雀鱼一样,雄性蟋蟀也要争夺雌性的青睐,虽然他们使用的是音乐大师般地动听啁啾,而不是视觉盛宴。 单词专题...
For females, there is often a significant energetic cost of exposure to male sexually coercive behaviours. Our understanding of the efficiency of female resistance to male sexually coercive behaviour is key to understanding how sexual conflict contributes to population level dynamics and ultimately to ...
Male guppy. Credit: Culum Brown Male guppies pay a high cost for their sexual harassment of female guppies – including much higher mortality rates – a new study from Macquarie University has found. Sexual harassment in guppies, or unwanted male attention, is a product of males attempting to ...
One limitation of this method is that one cannot distinguish individual females, and so only a single true replicate measure of female responsiveness (mean) or preference (common slope) can be obtai...Brooks, R. & Caithness, N. 1999: Intersexual selection, sneak copulations and male ...