Research Paper On Pilchards

The mating season is year round and once they’re pregnant the, length of gestation is one hundred thirty days to one hundred ninety days. (The gestation for a human is two times longer.) They only have one offspring at birth. After birth the young latch onto the backs of their mother and stay until a year of age.

During that time the male will go out and seek a female usually in her burrow and that is when the life cycle

The american water shrew also known as the Sorex palustris is the “world’s smallest warm-blooded diving species.” The american water shrew is rather large. It has a slender body covered with brownish-black fur. It has a long tail and a long pointy moveable snout. The total length of this critter can range from 130mm to 170mm, and the weight can be from 8 grams all the way to 18 grams. Both the female and male critters seem to have the same appearance but the male water shrew tends to be longer and heavier then female water shrews. The color of the critter can vary, it is generally a brownish-black color or a grayish-black or the dorsal side. On the ventral side it tends to be a silvery-grey. The color of their fur seems to change with season.

An environment with a lot of vegetation and their preys is ideal for them. They are perfect hunters with ability to stalk their prey with patience and stealth. They then capture their meals with one strong leap. These animals live in solitary or in territories. One unique thing about them is that the females do not share the same territory with each other. Territories for males usually tend to overlap. The territories are established with scent markings and the size varies extremely. The size ranges from twenty five to thirty square miles for males and five square miles for females (Sunquist & Fiona

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

Mating is believed to occur during a limited “receptive” period prior to the females first nesting emergence. During mating season, males may court a female by nuzzling her head or by gently biting the back of her neck and rear flippers. If the female does not flea, the male attaches himself to the back of the females shell by gripping her top shell with the claws in his front flippers. He then folds his long tail under her shell to copulate. Copulatoon can take place either on the surface or

Axolotls live from 10 to 20 years. There are about 500 offspring per litter. Their main predators are birds and fish. They can be one of five different colors including black, white, pink, grey, and brown. (I personally prefer the pink ones, so much more cute) They can travel in the water

California's severe drought has put millions of its trees in severe danger of dying. If you are living in an area suffering from similar or even less severe drought conditions, you can save your trees by following these simple guidelines. Most of them are already beneficial for your tree's health, but are absolutely essential when water is scarce.

The nesting season runs from April to Mid-July. And, sometime between about 45 to 70 days after being laid, the eggs hatch, and the little ones make the perilous journey across the beach, into the surf, and eventually to the open ocean, desperately dodging predators along the way. Their survival at this point depends on sheer numbers and making it to the water before the hungry seagulls and crabs can snatch them up.

Mating occurs before sunrise and mates are found by scents. When the female lays her eggs it forms a stick that contains thirty to fifty eggs. They hatch after about twenty-five days and they eat the cactus pad. After about two moths in the host cactus they exit the cactus and form cocoons. They become a pupa under the debris on the ground. Once they reach the moth stage they search for a

For reproduction it is best to place one male in with 2-3 females. This will lower the rate of fighting compared to a one on one. Then the female will typically make a burrow 6-8 in. deep and lay her eggs there. The eggs will hatch about 60-70 days

Texas Cichlids breed easily ("Texas Cichlid"). The female will lay eggs on top of something that is flat and the male will impregnate the eggs ("Texas Cichlid"). Before the eggs hatch, the male and female cichlids burrow a small hole ("Texas Cichlid"). The male protects the area while the female takes care of the eggs ("Texas Cichlid"). Three to five days later, the baby cichlids are born and then they spend time in the hole that was burrowed for five to eight days ("Texas Cichlid"). Once they reach a certain size, the young cichlids should be taken out of the tank ("Texas

When the temperature drops, animals who hibernate disappear from the outside world and emerge once again out in the open in the spring. Biologists wonder what activity occurs in the animals’ hidden underground chambers. Semi - fossorial animals dig enough suitable space underground for hibernation and movement. Woodchucks, skunks, and cottontail rabbits are known species that would occupy a den. Small mammal species like the jumping mice, meadow voles, and white footed mice are known to roam along vegetation to conceal themselves from prey. However, what is the probability that a small mammal would take the advantage and sneak right in and occupy it during the winter is a subject that interest most researchers.

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.

It is protected by a brownish striped shell, this individual mussel was originally homed in Eurasia (Europe), but now can be found within our river, the St Lawrence. Zebra mussels are filter feeders which being so they reduce the amount of plankton for other species. In large quantities when eating they can clear the water up, which allows the sunlight to penetrate deeper into the Saint Lawrence. Zebra mussels don't eat certain types of plankton, which impacts other species greatly due to the toxic algal blooms. With clearer waters, light sensitive fish, like the walleye, swim to deeper waters to escape the sunlight. Many scientist to this day are concerned with the health of fish and birds who eat the zebra mussel. Meaning if we went back in our history this could of possibly never been a