Male Dingoes Essay

Unfortunately, they don't have a lot to defend themselves from with the tail being the only thing useful, but luckily, they don't have a lot of predators. The biggest predator is humans actually due to the fact that some people hunt them and that some boaters hit them with their

Shark mating rituals vary from the size of the shark and its specie. In smaller, more flexible species, the male coils around the female, while the male of the larger specie orients himself parallel and head-to-head with the female (Woums & Demski 1993). Some species mating rituals also consists of males biting females on the pectoral fins or the middle of the back to hold on to them (Woums & Demski 1993). The female will often bear scars or marks, after the ordeal. Due to the fact that sharks are cold blooded animals, there is no precise gestation time. The development of the embryo will depend solely on the temperature of the water, however, the gestation period can last anywhere from 2 months to 2 years (Woums & Demski 1993). Within shark species there are two methods of reproduction. In some cases a female shark will lay eggs in a coastal nursery where the presence of other sharks are absent. And in other cases, usually in the larger sharks, females give birth to live offspring (Wourms & Demski 1993). In which case the young are born fully developed, and once they are born they shoot away fast or they risk being eaten.

They can also breed with coyotes because their DNA is so similar. Both of the parents care for their young after they are born. The pups leave the den by the time they are 6 weeks old, they reach full size by the time they are one and can reproduce by the time they are two.

Badgers breed around late fall and autumn, when badgers breed they have up to 3 young ones. The boys are called boars, the girls are called sow, and a young badgers are called

While sex changes have spurred many recent debates, it's actually not a big deal in the animal kingdom. New research shows that black sea bass, also commonly known as the giant sea bass, do it a lot. And Rutgers scientists are trying to figure out why.

One bullfrog kept in captivity was said have died at the age of 16. Bullfrog breeding occurs around late spring to early summer, when the male bullfrogs call out to the female bullfrogs attracing them into their territory. Once the bullfrogs have mated, the female bullfrog can lay around 20,000 eggs which float together on the surface of the water. Due to the relatively small size of the bullfrog and the fact that its calls can be heard for some distance, the bullfrog has numerous different predators within its natural

The male often bites the females nose (upper jaw) leaving it swollen and bloody. The wounds form pink scars, which can be used to identify if the otter is make or female. Otters have a gestation period of 4-9 months, or longer depending on the breed of the otter. Eurasian otters give birth in April or May. They can have up to about 6, or so, babies. Fresh water otters give birth on land or in dens. Sea water otters give birth in the water. Sea otter pups measure up to 56-61 cm. And fresh water pups can weigh up to 130 grams (4.6 oz.). A female otter has four nipples and her babies will nurse every 3-4 hours for 10-15 minutes. Mother otters are very protective over their young pups. The mother will float on her back in water carrying her pup on her belly and spend a great deal of time grooming/cleaning the pup. Baby otter pups often open their eyes after they're about a month old. All freshwater pups stay with their mother for about a year, until the next liter is born. By about four months of age the pups are able to swim and dive well enough to catch their own food and live on their own. Growth rate in otters differ depending on the species. Otters live up to 10-15

Killer whales are apex predators, lacking natural predators of their own, and inhabit all of the worlds oceans and most of our seas. They vary broadly in behavior, diet, and communication patterns. There are three main sympatric ecotypes of killer whales present in the Pacific Northwest, known as “resident”, “transient” and “offshore” killer whales. Of these, the resident whales of the Salish sea have been by far the most heavily studied. Their prey is salmon, chinook salmon in particular, and they hunt cooperatively. The resident pods are divided into “northern residents” and “southern residents”, the latter being comprized of three pods (J, K, and L). These three pods are well researched, as their markings and distinct calls make identification extraordinarily accessible to human scientists. Orca are distinct among mammals for the long post-reprodutive life of female orca, who provides extensive parental care even after menopause. Numerous studies have shown a clear correlation between the mother’s survival and the offsprings fitness. This paper will explore the matrilinal social structures of Puget Sound’s orcas to assess the evolutionary advantages to close mother-son relations. In particular, it will examine the difference in behavior of female and male offspring upon reaching sexual maturity, and relate this to similarities or differences in parental care output from male and

Reproduction: The reproduction is dioecious, sexual, internal fertilization; viviparous. White eye orcas are polygamous, which means that they can have multiple partners in their lifetime. The maturation time of the males and females is different, for males it is 11 years, and for females it is 14 years. The females do not mate until they obtain the sexual maturity, also both sexes in order to mate, they have to be strong physically to be able to compete with other orcas. White eye orca females are able to mate several times a year, which means that the reproduction cycle is not regular. Similarly to the killer whales, white eye orcas have their own dialect, each pod has its own language, and this fact plays a huge role in the mating process, because most of them do not mate with orcas from other populations. The length of the gestation is about 12 -13 months, orcas give birth to only one offspring every time, calves are being born in the water. White eye orcas are precocial, females are significantly invested in parental duties for about a

Despite the stereotype of black bears being a threat to one’s safety, Animal-zone explains how black bears are actually very gentle, joyful animals that have a predictable behavior. Black bears live all around the world. Black bears, like all animals, have unique characteristics, behave differently as male or female, exhibit special adaptations and live in several types of habitats. Black bears have various characteristics to help them flourish in the wild.

March and February is the breading season for coyotes. In spring, females make dens to prepare for their babies. The gestation period of a female is 63 days and gives birth to groups of three to 12 young at a time. The group of coyote babies is called a litter and each coyote baby is called a pup. The size of the litter size is based on where the coyote lives. In places where there are a lot of coyotes, there will be a smaller litter size. In areas with less coyotes, the litter size will be bigger. Taking care of the pup is a job that both male and female participate in. The male will bring food to the female and the pup and help protect them from predators. Since a pup is born with there eyes shut, the female will stay in the den for her pups eyes to open. This might take 11 or 12 days.

The Orectolobus arctoae or more commonly known as the Arctic Wobbegong, just like every other reproducing organism on this planet, goes through a process called natural selection. One adaptation of this particular organism is the ability to camouflage to the sand of the Arctic Ocean with lighter colored flesh [in comparison to its nimble yet sluggish cousin the Japanese Wobbegong]. The genetic variations of this adaptation are flesh tones that are the same color of, lighter or darker than the sand of the Arctic Ocean; which is uniquely lighter than that of the Indo-Pacific. The O. arctoae overproduces its offspring with one every two years. With a gestation period of 1 year and a lifespan of approximately 50 years, this organism produces 25 pups over its lifetime. The limiting factors in the environment of the Arctic Ocean that cause this adaptation are the threat of multiple species of large whales and other predators. In the process of selection, the Wobbegongs whose flesh is closer to the color of the sand are able to survive and reproduce viable offspring. Another adaptation of the Arctic Wobbegong is the layer of blubber under the dermis found in many Arctic organisms. The genetic variations of this adaptation are blubber depths that are thicker or thinner than the approximate 6 inches. The O. arctoae overproduces its offspring with one every two years. With a gestation period of 1 year and a lifespan of approximately 50 years, this organism produces 25 pups over its

giant otters have been spotted playing with their sustenance before eating it. Giant otters are likewise known to air out shellfish by hitting them against rocks. Grown-up otters frequently play with their infants or communicate during mating season. Youthful otters, grown-up otters consistently take part in play. Studies have discovered a connection between prey plenitude and time spent playing when sustenance turns out to be rare, recess and social conduct for the most part

Yet it is still unclear why this stable strategy is so rare, as it is only known to exist in <0.1% of vertebrate species (Dawley and Bogart 1989). With advances in genetic analysis biologists have been able to confirm and refute some of the previous reports of parthenogenesis (Mittwoch 1978). Subsequent studies and technological development serve to increase the number of known parthenogenic species and improve our understanding of the factors promoting these unusual reproductive strategies. With so little existing data from such diverse species, it is still impossible to conclude if parthenogenesis occurs as a synapomorphy in any of the vertebrate clades. The evolutionary ramifications of potential paternal leakage in gynogenesis are also unclear, and are likely to vary among different species (Lamatsch and Stöck 2009). Known occurrences of parthenogenic bony fish in the wild are well-documented and are growing in number. However, parthenogenesis in wild sharks has yet to be reported. It is possible that automixis only exists in shark populations that lack males, as was the case in all of the captive studies (Robinson et al. 2011). Increasing our understanding of such unusual reproductive strategies in fish serves to accelerate our understanding of biology, ecology, and the biomedical sciences (Lampert 2008). The future of studying fish parthenogenesis is bright and a significant amount of novel research is left to be

The mating season for a black bear differs from most animals. Most animal’s breed when they are in peak physical condition, but black bears when their body weight is at the lowest for the year and the food is scarce. This is usually in the spring. The birth of a cub usually takes place in the sow’s winter den. If it is the bear’s first litter, there will often be only one cub, but if it is not she may have two or