Seahorses have one of the strangest reproduction cycles. Out of both genders of seahorses the male is the most important. Females are the gender most commonly associated with pregnancy, but there are many species in nature in which the male carries the offspring. Seahorses are one of those species. Male seahorses are very crucial to seahorse reproduction because they carry the offspring, conceive the offspring, and let them grow up. Seahorses start their mating rituals by changing colors and wrapping around each other and sea grass to strengthen their bonds. In seahorse mating, the male and female try to align themselves in a way so the woman can transfer the eggs to the male. This one task can take hours to accomplish. The amount of young
Seaworld is a giant marine life theme park. The greatest attraction to these many theme park would be those killer whales. In fact, these killer whales are the face of the park. As gigant as these mammals are, seaworld is keeping them in some pretty tight quarters. Mr. Jett and Mr.Ventre says “Wild killer whales can swim a hundred miles daily as they socialize, forage, communicate, and breed. In stark contrast, with little horizontal or vertical space in their enclosures, captive orcas swim only limited distances, with most spending many hours surface resting.” The animals don't have the freedom they need. Also when taking the whales out of their natural habit the whales tend to be depressed and not as heath in that situation. They need their freedom in the big ocean blue. Bring them into the small living units, breeding whales in captivity all for the entertainment of humans. At young ages the calves are taken away from their mothers on to a new seaworld park. Mothers of the calves have even been seen denying their offspring.
The humuhumu are a very independent and aggressive fish therefore they breed externally,but still heterosexualy.. Once they reach the age of maturity, the female will lay her eggs in the wedges of a coral which will then be fertilized by a male soon after. Then once they are fertilized the female will come back and guard the ...
The courting ritual begins with the males circling females in an offshore mating ground and then the males approach and bite a female’s neck and if she accepts, they mate; if she does not accept, she swims to the bottom of the mating grounds (Deurmit L 2007). Males have long claws to use during mating because other males try to remove the mating male in order to mate with the female (Deurmit L 2007). Caretta caretta are polygynandrous and breed seasonally in the early summer (Deurmit L 2007). With mating, the females have the ability to store sperm throughout the reproductive season (Sakaoka K et al.). This characteristic developed with “changes in the sperm storage tubules (SSTs) in the oviduct” and allows the females to reproduce more (Sakaoka K et al.). This storage helps to combat climate change because Caretta caretta, as a species, only breed during certain temperatures (Sakaoka K et al.). Female loggerhead turtles have developed sperm storage abilities within mating to combat climate
...to 300 individuals, the newborn seahorses are independent of parental care and the male is free to fertilize and accept more eggs(Lourie 11). The offspring bearing roles displayed by Hippocampus spp. is an extreme shift in relation to many other species of kingdom Animalia, of which the bearing of young is predominantly carried out by females. According to Foster, growth rates throughout the life cycle and the duration of the life cycle of seahorses in the wild varies between species and cannot be determined due to insufficient research data(foster 22). Once sexual maturity is reached, often determined by the presence of a brood pouch in males, adults are able to reproduce. During reproduction, the overwhelming majority of Hippocampus species display monogamous behaviors, usually mating with the same partner for the duration of the mating cycle(lourie 10-11).
To begin with, it is an innate behavior when an animal has the instinct to know when to mate and to which species. This is known as a Courtship behavior. For example, I own a fish and a snail which live in the same tank. During the mating time, they both know not to mate with each other. They won’t mate because they aren’t the same species. When they find their correct mate, they may use dances, songs, colorful displays, or pheromones to attack their mate. Usually birds do a dance or song while peacocks show the colorful displays of their feathers. This r...
The word “monotreme” is Greek for “one-hole,” referring to the cloaca that is the exit for the urinary, reproductive, and excretory systems (Dawson, 1983). The creatures are oviparous--the females lay eggs that develop outside of her body. This paper will explain the background of the animals, the anatomy of the tract and egg, breeding behavior, and genetics behind this unique reproductive system. It will pay special attention to the similarities of the monotreme reproductive system to those of animals we are more familiar with.
This leads to sexual dimorphism and the evolution of physical sex differences. If the male organisms have to compete by combat they evolve to become as physically superior as possible, so the males develop in size and that can lead to males being a lot larger than the females. For example the male elephant seals have to fight for the females and therefore the female elephant seal is much smaller than the male. The individuals also compete using displays, the male individual would be ornamented and the female would be dull looking. For example, a peacock’s tail or the ritual of attracting mates of the male paradise
Males are usually larger than females, but there are no obvious physical differences that mark their sexes. There is only one very slight difference in the pattern of scales in front of the cloaca. Though it is difficult for researchers to identify the sexes, the Komodos seem to have no trouble. They mate between the months of May and August. The female lays about 30 eggs and the incubation cycle is roughly 9 months (Benyus, 1992).
Of the many fish of the sea, none is more interesting and unique than the seahorse. Seahorses are truly one of a kind in more ways than one. They can be found in temperate and tropical bodies of water throughout the world. With a tail similar to that of a monkey, fins that rememble those of a fish and a head that resemble a horse this animal is extraordinary. Along with those characteristics seahorses are known mostly for their odd method of conception and pregnancy. Seahorses are monogamous and one of the only species where the male is the one to become pregnant.
A juvenile horse of either sex, under the age of one, is known as a foal...
The battle between sexual and asexual reproduction is a competition that has been ongoing for millions of years. Somewhere along the way due to its higher level of genetic variation, sexual reproduction was able to overcome the two fold advantage of asexual reproduction, and now dominates reproduction in organisms. However, some types of organisms such as worms and corals have acquired the ability to reproduce both sexually and asexually. The purpose of this paper is to explore the differences in asexual and sexual reproduction both from a biological and an evolutionary standpoint and to explain why evolution has made it possible for soft corals to reproduce both sexually and asexually.
You can actually tell the gender by looking at the ossicones. Giraffes ossicones start as a cartilaginous structure, but over time the cartilage is replaced by bone. This makes the ossicones much harder and tougher so it is easier to
Figure 1: a Punnet square showing that there is an equal opportunity for a foetus to develop into either a male or female. It also shows how the male gamete determines the foetus sex by combining the X chromosome with either an X or Y chromosome.
... the males are and after the fight ends the victor will mount the losing male to claim its victory and attract females for reproduction.
Moreover, male descendants seldom obtain the similar skill rests uncertain, however scientists state that male bottlenose dolphins have a tendency to arrangement of close bonds with former males, and such groupings aren't suitable to seabed scavenging, meanwhile it is a timewasting, lonely activity. Scientists learned that even though dolphins vexed to teach the hunting method to all their young, it was mostly female offspring that clutched the idea. Moreover, male descendants seldom obtain the similar skill rests uncertain, however scientists state that male bottlenose dolphins have a tendency to arrangement of close bonds with former males, and such groupings aren't suitable to seabed scavenging, meanwhile it is a timewasting, lonely