Guppies Lab

In an article by Lee Alan Dugatkin and Jean Guy J. Godin they discuss how women unknowingly select their mates based on what they believe to be their choices and personal preferences, but really their choices stem from their subconscious and biological pre-programing. One of the examples that are given in the article is how vibrant colors, although not evolutionarily smart in terms of camouflage, are effective when it comes to finding a mate. Like for instance guppies and peacocks, the males possess these vibrant, bright colors to attract females and innately that is what the females look for. The more colorful the male, the more likely the female will choose him to breed with because to them the brighter the males are the stronger their genes are and the more possible it is that their offspring will survive and continue passing on their genes (Dugatkin et Godin,

Predatory selection demonstrated heavily on how the predators prefered brighter males and how females then resorted to whatever was left. From my data of mostly drab and mostly bright guppies with the simulation having 30 rivulus, 30 acara, and 30 cichlids, I could see a clear trend. For the mostly drab guppies, in a mere 7 generations or 141 weeks, showed that the predators had wiped out the brighter guppies having a split demographic of 0% of the brightest and bright guppies, 30% for drab guppies and 70% for the drabbest of guppies. In the mostly bright guppy test, it was more even but showed an obvious lean towards the drabber guppies having 20% and 17% for brightest and bright guppies, and 17% and 46% for the drab and drabbest guppies respectively. With all this data, the trend leaned towards having the bright guppies

Heterozygotes, which have the wild type phenotype, have normal sight which gives them the advantage of finding a mate and have a better success with attracting a mate with their courtship song (Kyriacou et al, 1978). The male heterozygous Drosophila had a better advantage at mating than the homozygotes, which were the ebony, and therefore we predict there will be more wild type by the end of the experiment.

Over the years, the male population of the blue moon butterfly has increased to nearly forty percent and this is all due to evolution. (Sherriff 2007).

The color variation of Venezuelan Guppies results from a difference between traits that are beneficial for survival and those that are beneficial for reproduction. While females are more attracted to bright males, predators limit the population of bright males from the top down. Therefore, the population of Venezuelan Guppies differ in color due to the presence, or lack of, predators.

In this chapter, Orr and Zuk explains the importance of ornaments of males and the mechanism behind sexual selection. The questions that they seek to answer involve the fact that why are the males fighting during mating season, and the ones with the colorful ornaments. In both human and animal relationship, there are many similarities, such as the fact that the male fights for the female such as their masculinity or traits that females look for whether an animal or a human. Darwin in The Origin explained that sexual selection involves competition, but for mating instead of fighting for survival, in The Descent went on to explain the relevance of the traits like the peacock tails.

Accepted animal mating theory suggests that females tend to select more “attractive” males as their breeding partners. In the case of Túngara frogs from Central America, male “attractiveness” is generally dictated by vocal ability and the size of their vocal sacs. However, a new study reveals that all hope is not lost for males with less desirable songs, thanks to the “decoy” effect.

Dreiss, et al (2012) suggests that female barn owls colour preferences within an ecosystem is associated to their colouration, however males do not exhibit habitat preferences in relation to the colour. Females have numerous pheomelanic phenotypes so their offspring must be produced within an ecosystem which aids her specific colour type (Dreiss, et al, 2012). Conclusive evidence supports the statement, The Barn Owl Trust (2016) stipulated the colouration enables the species to camouflage in their ecosystem for survival. However, Roulin et al (2000) claims the female’s colouration aids reproductive success because males have more of a sexual preference towards females which display more black spots. Both theories have sufficient evidences and

This result is not very clear, since the purpose of the outcome does not suggest whether the use of space is correlated with environmental factors shaping mating

Researchers have developed a mathematical model that made made a shocking prediction. Animals with ornamentation, males with evolve out of the tension between natural selection and sexual selection into two distinct subspecies. The first is with flashy and costly ornaments but it attracts mates better and the second low cost ornaments. In many animals they separate into two subgroups, one showy and one subdued, with very few in the middle. The contrast gives the more ostentatious individual's physical distinction, helping wow mates and promote themselves.

domesticus. For example, a greater level of hunger, restricted access to mates, and increased odors of females will increase and escalate the males’ aggression when fighting (Brown et al. 2007). A study done by Brown suggests that motivational symmetries change a males’ aggression. It was concluded that the solitary males initiated 80% of the aggressive behaviors during fights against males who have an unlimited access to females (Brown et al. 2007). The solitary males are more willing to increase aggressiveness in fights over mates because they will benefit more from winning. When fighting for females, solitary males have better mating success by a factor of 14:1. However, because females favor males with qualities related to good competitive skills, the males’ aggressive behavior increases to improve their reproductive

Our question that we’re trying to answer is “Why will the Characteristics of a Bug Population Change in Different Ways in Response to Different Types of Predation”. Our objective was to see if there was any changes in different predation. If the insect's population change because of their characteristics, it means that our hypothesis is correct

The guppy is a really colorful sea animal and often displays elaborate patterns on its tail fin. The female guppy and the male guppy can be identified quite easily as the female guppy has a small, patterned tail where the tail of the mail guppy is much longer and generally having fewer markings. The female guppy also tends to be larger in length and weight than the male guppy.

From the cross white eye males with wild females, our results were we got both phenotypes in the males as well as the females to be wild type.

From our experiment, we are unable to reject that female crickets do not choose their mates based on their calling song. The t-test value did not give us a significant difference in the female’s view time of the male’s for us to say that our hypothesis is valid. Looking at the values from Figure 4 though we can see the total viewing time among the different males, which shows the male with the louder calling song generally had more time spent in front of his side.