Male and Seahorse

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.

The first thing is the ability to camouflage. Sea horses being able to camouflage is a very great way to survive in their habitats because they can hide from anything that tries to harm them. In source 1 paragraph 3 sentences 1 through 3 it states “(1)

Results showed that clutch temperatures were relatively stable throughout the day, and that certain temperatures were, indeed correlated with observed offspring sexes. Though this study tested the American crocodile, Crocodylus acutus, it provides evidence of a correlation between egg temperature and the resulting sex of offspring. Charruau also presented an important point about global warming possibly posing a threat to the ratio of female to male offspring being produced in the near future, due to the fact that alligator sexing is based solely on environmental temperatures. These disrupted ratios could ultimately lead to the extinction of certain species, which are dependent on this mode of sex

A seahorse has a long curled mouth that helps it eat small animals. They also have a long curly tail that can help them hang on to coral and sea grass.

During the evolutionary adaptation time period, between 10-40 thousand years ago, our ancestors were hunter-gatherers. This created a division between men and women. The men would hunt for food and the women would be in charge of the domestic duties such as cleaning and cooking. Doing the domestic chores would have kept women more protected, as it is less strenuous and would have guarded the camp whilst the men were out hunting therefore increasing the chances of reproductive success. This division of labour would have made them less likely to sustain injuries and so the evolutionary approach would suggest that the groups who divided the labour were been more likely to

The ability to compare and relate from animal models shows us that the reproductive physiology can provide us with the knowledge to understand and question theories that are left unanswered (Davis et al. 2010).

Between 1999 and 2004, researchers collected tissue samples from the “fins, muscles, or liver” of scalloped hammerheads. The samples were obtained via fishing or fish markets across multiple ocean basins, including “Pacific: Baja California, Pacific Panama, Hawaii, the Philippines, Taiwan, and eastern Australia; Indian: Thailand, western Australia, Seychelles, and South Africa; Atlantic: Western Africa, Brazil, Atlantic Panama, Gulf of Mexico, and east Coast USA” (K.M. Duncan et al. 2240). It is important to note that the researchers also retrieved samples from juvenile scalloped hammerheads that dwelled in separate feeding areas from the adults where, and this is because there was likely to be overlap between breeding populations within the

In the article, “How a Seahorse Dad is like a Pregnant Woman” by Sarah Zielinski, may sound comical, but much to my surprise, has some biological information that is worth reading. Unlike human, beings male seahorses carry the babies, instead of the women. A male seahorse carries the eggs of his mate in a pouch. Inside the male is where the eggs become fertile and start the growing process. The pouch, or the homes of the eggs are inside the male, around the stomach region. The male’s pouch is very adaptable. When the male is not pregnant the pouch is not sealed off, but when there are eggs in the pouch it becomes sealed, isolated from anything else. When eggs occupy the pouch it adapts its size and the nutrients it realizes according to the

The evolution of monogamy in mammals has been challenging to understand for ecologists for many years, because in most cases male mammals are thought to have higher fitness through polygamous mating. One of the principles of evolution is that animals want to maximize their reproductive success, so two animals committing to one another kind of seems counter-intuitive. Animals want to pass on their genes to the next generation, and having more offspring means there 's a higher chance of survival. When females have long lactation periods or gestation, they are unable to mate during this time, so it would seem to be advantageous for the male to move on to their next mate.

Did you know that seahorses are the only members of the Hippocampus species? The name Hippocampus is Greek, it means “Horse Sea Monster.” There are thirty-four different species of seahorses. Many people are surprised when they find out that seahorses are a type of fish. They have fins and gills, the defining features of a fish. When seahorses are in a group they are called a herd, just like horses. Seahorses usually live one to five years, but they are becoming endangered because their habitat is slowly being destroyed. “Seahorses can be as small as one inch long and as tall as twelve inches long!”(Trisha Shaskan, page 23) Seahorses are not alone though, the Syngnathidae family also includes pipefish and seadragons. Syngnathidae means fused jaw.

"Ocean Ecosystems, Ocean Animals, Ocean Life -- Smithsonian Institution | Ocean Portal | Smithsonian." Ocean Portal. N.p., n.d. Web. 26 Mar. 2013

While David Hume was alive there was a well known image of what someone decided looked like an angel despite never having seen an angel. To tell someone they simply constructed a false idea of an angel, would be considered very rude, but it isn't necessarily a negative note. These type of ideas in which one combines multiple thoughts to make one complex notion helps us understand the unknown. Often in school teachers would start class off with projects to get our thoughts and minds going. Once my class was asked to combine two creatures and make one new animal. I made a horse seahorse, which had the body of a seahorse and the head of a real horse. Obviously, the horse seahorse is not a real creature, thus I created a false idea or

Horses are polyestrous, seasonal breeders with mid-summer foaling and mating seasons in late spring. Breeding occurs when the mare experiences photoperiod, which is the exposure to daylight within a 24 hour period. As a result, the mare becomes receptive, and the stallion becomes more dominate. Testosterone increases which promotes increased reproductive behavior, spermatogenesis, and libido. Thus, photoperiod, reproductive behavior, and spermatogenesis influences fertility and sexual behavior of the stallion.

biased between the male and the female reproductive biology. The article focuses on the role of

This development perspective is based in large component on the fact that humans are mammals. Male and female mammals differ enormously in energetic investment in generating offspring. Female mammals produce not only eggs but also a body which fetal growth takes place. After birth, they are required to produce milk and care for their offspring until the age of weaning. Males are required to produce sperm at the time of fertilization, and that is all. Following investment, “which can take the form if provisioning a pregnant or lactating female or providing food for the young, is not required, and in many species, including most primate species, males do not directly participate or invest in rearing young” ((Standford, John, & Anton, 2013, p.