Anglerfish Adaptation

Lake Malawi’s cichlid male population of fish are tested on their ability to build bowers to attract the female population. Altering this extended phenotype, or ability to build bowers resulted in no change of mating, but males that built successful bowers showed to

Unlike natural selection, sexual selection does not adapt individuals to the environment, but it enhances mate acquisition. It also explains how sexually desired traits may have fuelled the fire of rapid organism development. Some of the traits acquired give either negative or positive results. Negative results can even lead to extinction, but positive results can lead to elaborate change that brings about a stronger and better species. Darwin theory of sexual selection observed that female are the limiting sex and most of them are unavailable for sex as they are pregnant or caring for young one. Since male tends to be in excess, they develop ornaments to attract female or engage each other on male contests.

This study consisted of two experiments, in the first experiment they determined that the symmetry of the front legs of males was related to their rate of leg raises, this was used as a measure of male quality. They used this measure in the second experiment when they explored how Tigrosa helluo predator cues changed the males’ courtship behaviour. It was determined that predation cues did not have an effect on whether mating happened between males and females and a

Judson, an evolutionary biologist, portrayed as Dr. Tatiana, a sex columnist, cleverly conveys mind-boggling facts about an array of creatures within the animal kingdom using a satirical approach. “I am a queen bee, and I’m worried. All my lovers leave their genitals inside me then drop dead. Is this normal?” writes a concerned honeybee in regards to the sexual practices of her mate’s. Dr. Tatiana goes on to show understanding for the honeybees concern and explains just why her mates do what they do. As a reader, one gains intriguing information on the sexual idiosyncrasy of honeybees. The author achieves her overall goal of informing the reader of sexual biology by addressing the issue on a personal level, making a claim. Then following up with facts that support the claim.

Although homosexuality among animals seemed quite interesting I became amazed and intrigued in the sex roles of seahorses. In other words, I had no idea that seashores in particular have a different and an unexpected reproductive system. For instance, in this specific species the female is the one who transfers the eggs to the male’s stomach, in which the males then become pregnant. Now in this certain situation, roles are not only reversed when it comes to the reproductive factor but reversed in general stereotypical roles such as the females are not the ones choosing the male. Dr. Roughgarden’s example of seashores in fact did prove Darwinian story wrong, in terms of the male is the one choosing the female. On the other hand, the reason

This creature in the deep ocean zone all the way to the intertidal zone. The Lish lives in a rocky cave system that stretches for miles on the ocean floor. It does not have a hard time hunting prey because there is plenty of fish and other species around the Lish. While the ocean life is sleeping the Lish claims its victims. They prefer warm water to live in because there are more species there to feed on.

These marine carnivores have enormous cresent-shaped mouths and long fake like teeth. They range from eight inches to three feet and can weigh up to one hundred pounds. The females have an illicium which is a distinctive spine. At the end of the illiciun, there is a fleshy growth reffered to as the esca. They have thin, soft bones and jelly like skin. These canivores can expand their jaws to eat their prey whole. their enormous stomachs allow them to eat prey up to twice their size. One of their great adaptation qulaities is being able to eat large quanitites at once. There are 200 known species of the anglerfish. There are probably more than that because they inhabit great depths in the oceans where humans and their research seldom venture. Since they inhabit great depths the sunlight can not reach them, which means no light. The deep living anglerfish have a certain type of bateria that produces light and glows on the dark. This is called bioluminesence. Bioluminesese is great for adaptation to their extreme enviornment. Believe it or not, the male anglerfish looks like a total different species! They are ten times smaller than the female anglerfish. Scientists at first were noticing that fisherman were only catching female anglerfish. Something they did notice was that there were small growths on the side of the female anglerfish. Which turned out to be a male anglerfish! What it is that when the two mate, the males' digestive system weakens and it's making it impossible to eat on his own. As a result, the male bites into her belly and then his mouth fuses to the female body. In conclusion, he will stay attached to the female readily to mate. Thsi unusual species is considered a delicacy (food) in Japan and Korea. They say it has a lobter taste and texture. The anglerfish is a quite "special"

Sexual behavior and other reproductive characters are the most basic criteria for suspecting sexual selection in a species of organisms(Leonard, 2006). One organism who provides an example of courtship behavior includes land snails. Land snails exhibit elaborate courtship behavior by shooting their partner with a calcareous when mating. The calcareous is about a centimeter long. The long calcareous is referred to as a love dart. When the snail is shot with the love dart, sperm is released which can then be released and fertilize the other partner’s eggs. This process is an example of a bizarre sexual behavior. It is labeled as bizarre because it is out of the ordinary and the result from being shot with the love dart can sometimes be unfortunate. Love darts can sometimes cause accidental deaths in the snails. They can also ultimately lower the fertility rate of the snail because of the damage that is done to the body when the dart is inserted. Another example of unusual conduct is apophallation, which can be found in two different types of slugs. Apophallation is when sexual intercourse is sometimes ended by the removal of the penis of one or both of the individuals. Studies have suggested that individuals who exhibit courtship behavior also tend to exhibit aggressive behavior(Chiver and Schlinger, 2016). Although elaborate and bizarre behavior is common in many species of

Mating season usually occurs during the winter. During the breeding seasons, males of various stingrays use their “ampullae of lorenzini” to sense certain electrical signals given off by other female counterparts before potential copulation. When the female is found within site, the male courts the female until he is able to bite at her pectoral disc (pre-copulatory biting). In this process the male bites off the female’s pectoral fins and in process, replaces one of his two claspers into her valve or cloaca. The clasper then transfers the sperm into the female’s oviduct where the egg is fertilized until the birth of the babies. All female Stingrays are internal fertilizers and therefore undergo a process called ovoviviparity.

As you are learning about different adaptations and interactions among living things. You and your partner will choose one animal from the options below and investigate the animal’s habitat and explain how the animal’s physical and behavioral adaptations help it survive in its particular environment. You will also describe how the animal interacts with other organisms and discuss how an increase or decrease in your animal’s population can potentially affect other animals in a similar environment.

In the wild the Poecilia reticulata or the guppy brightly colored males are more likely to be eaten by a predator because they are visible. Although guppies that are more brightly colored are prayed upon more often than those guppies that are not their bright color is beneficial in attracting mates. Humans, plants, and animals compete amongst themselves not only for water, territory, and sunlight but also for the ability to reproduce. Sexual selection is necessary for a population to survive. In the case of the brightly colored guppy, it uses his phenotype in order to pass his genes to the next generation. The female guppy is known to choose bright males over those who are not for many particular reasons. They might indicate the presence of

There has been studies done that focus on the reproductive morphology, mating behavior, and spawning ecology of two types of cephalaspid sea slugs (Aglajidae and Gastropteridae). There had been experiments done of four opisthobranch species that belong to the families of Aglajidae and Gastropteridae. Behavioral and morphological traits vary considerably between species, even closely related sister taxas. Also while they observed the species from each group

“Adaptation is repetition, but repetition without replication” asserts Hutcheon (2006: 7), stating that there are reasons why an adapter would decide to make certain changes. Regarding character development, the Grimm brothers’ compilation is quite similar to the original Sleeping Beauty tale in the sense that not much is said of the evil fairy in neither of them. The original tale describes the evil character as “a very wicked fairy (...) with an evil smile on her face”, and the Grimm brothers just call her “the thirteenth fairy”. In both versions, the reason why the fairy casts the spell on the princess is because she hadn’t been invited to the baby’s christening, and that is all we know about the character. Undoubtedly, the focus of the

Sexual selection is a type of natural selection where a species determines to mate with certain species of the opposite sex. The article talks about the transformation of Bidin and how it correlates with sea star sexual selection (Caspermeyer 2016). To carry out the experiment they made use of Sea Star’s mating system. By concentrating on their mating system scientist were trying to figure out the transformation of one the type of protein called “Bidin” (Caspermeyer 2016). 13 species were used for the experiment (Caspermeyer 2016). Scientists wanted to perceive how the Sea star’s mating system with different species influence the protein (Caspermeyer 2016). Results indicated significant amount of variation, which tell us that it did have some

To determine how the pair bond has been established, one must look at the various evolutionary pressures that lead to this type of behavior. As Herbert (2005) explains, the reproductive strategies of organisms are often defined by biologists as “r” or “K” strategies. The former tend to be smaller and live in unstable environments with their reproductive strategy being to produce as many offspring as possible (potentially only once in their lifetime), many of them dying before reaching the reproductive age of their already short life expectancy. The offspring with the highest fitness are the ones that survive to this reproductive stage. In contrast, K-strategists