The Biogeography of the Dolphinfish
Description of Species
Dolphinfish are compressed, elongated fish with a large mouth and many fine teeth. They have a long dorsal fin that stretches from their nape to a forked tail. The anal fin is also long, extending from mid-body to their forked tail. Males have a bony crest on the head that is not present in females. These colorful fish exhibit hues of gold on the sides, iridescent blues and greens on the sides and backs, and white and yellow underneath. The average size of the mature dolphinfish is between 1.5 - 3 ft. and weighs 15 - 30 lbs. Males are generally heavier than females regardless of length (Palko et al. 1982). The largest fish ever recorded was an 87 lb. fish caught off the coast of Costa Rica. Studies of sex ratios are inconclusive in regards to the distribution of males and females worldwide (Palko et al. 1982).
Habitat
Coryphaena hippurus is a pelagic fish that inhabits tropical and sub-tropical oceans worldwide. This cosmopolitan saltwater fish prefers water above 70 degrees F. (McClane 1974), and therefore, temperature determines the range for this species. The dolphinfish inhabits open waters near the edges of the continental shelves in tropical and sub-tropical environments (Palko et al. 1982). Vertical distribution in the ocean ranges from the surface to approximately 90 feet underwater (Palko et al. 1982). They are commonly found loitering near objects floating in water that may harbor prey species. These objects can be as substantial as large clumps of Sargassum weed, and insignificant as small streams of sea foam. Not much is known about the migration patterns of this fish, but it has been hypothesized that they follow seasonal fluctuations in water temperature in search of more productive food sources (Palko et al. 1982).
Natural History
Dolphinfish are migratory fish that travel in schools known as pods. The size of these schools is usually determined by size or sex. Young female dolphinfish tend to congregate near Sargassum patties while the young males usually seek the company of older males and females in the open ocean (Palko et al. 1982). Additionally, larger fish travel in smaller pods. Research concerning migration has provided little information about what determines the movements of dolphinfish.
The nonnative species of the lionfish, living in tropical waters to depths far below is an unseen threat by first glance. Truth behold, this fish is a serious pest since the first sighting in Dania Beach back in the 1980s. Presently, it has grown out of its bounds and causes harm not only to the sea life but trouble to humans as well. An unmatched appetite with a fast and large reproduction to spawn its species in a matter of only a short time, makes this invasive fish at the top of a sounding alarm. Clever biological adaptations have made this fish a tough fighter to the ecosystem and only in the past few years have we learned to take effective measures to control their population to save our coral reefs.
Diagnostic medical sonography is a profession where sonographers direct high-frequency sound waves into a patient’s body through the use of specific equipment to diagnose or monitor a patient’s medical condition. As described by the Bureau of Labor Statistics, this examination is referred to as an ultrasound, sonogram, or echocardiogram. The high-frequency sound waves emitted from the handheld device, called a transducer, bounce back creating an echo and therefore produce an image that can be viewed on the sonographers computer screen. This image provides the sonographer and physician with an internal image of the patient’s body that will be used in the diagnosis. The most familiar use of ultrasound is used in monitoring pregnancies and is provided by obstetric and gynecologic sonographers, who also provide imaging of the female reproductive system. Other types of sonography include; abdominal sonography, breast sonography, musculoskeletal sonography, neurosonography and cardiovascular sonography. Due to the vast nature of uses in sonography, most professionals study one field that they choose to specialize in. Diagnostic medical sonography is a rapidly growing field because of the increase in medical advances. The area of Cleveland, Ohio has continued to rise in the medical field with great strides, providing better career prospects with the availability of numerous employment positions.
The Society of Diagnostic Medical Sonography is one of the largest diagnostic organizations with well over 28,000 members. They work with students who want to be sonographers. Some benefits are that they will help promote,advance and educate you.
Bottlenose dolphins are carnivores that eat a variety of fish, squid, and crustaceans such as shrimp. They can eat up from 15-30 pounds of food a day. They hunt using echolocation. According to Merriam-Webster’s online dictionary echolocation is a physiological process for locating distant or invisible objects by sound waves reflected back to the emitter from the objects. Bottlenose d...
When you see a dolphin, you are in awe, but what sort of questions do you ask? How do they swim so fast, what do they eat, where do they live? First, the anatomy of a dolphin. We’ll start with a dolphin’s teeth. Dolphins have eighty to one-hundred cone-shaped teeth. These teeth are set up in a position to interlock and hold slippery fish in its mouth. Because the teeth interlock like that, and the teeth are as sharp as they are, dolphins cannot chew their food. Therefore, they must result to swallowing their food whole. To a dolphin, an open mouth is a sign of aggression, and clapping jaws are an even greater sign of aggression. This rarely happens unless it is during mating season because dolphins talk without opening their mouth.
Most Americans have never even had the thought cross their mind that dolphins could be considered a food. However contrary to the belief of almost all Americans dolphin meat is consumed in various parts of the world. On the other hand Japanese fishermen from Taiji do not see dolphins the way that Americans do. Most of the fishermen from Taiji just see dolphins as another big fish. For example a fishermen from Taiji stated that “they’re food, like dogs for the Chinese or Koreans.” (Butterworth, Andrew) The consumption of dolphins is just so common and part of the culture for these Japanese fishermen from Taiji. They see a dolphin as Americans would see a tuna fish. Dolphin meat is dark red almost appearing black and is not consumed in many parts of the world, Japan and Peru are two of the very few areas where dolphin meat is
The current demand is high for sonographers throughout the United States and abroad. It has been shown that the demand for sonographers will continue to increase well into the future. According to the Bureau of Labor Statistics (BLS), the employment in the field of Medical Sonography is predicted to grow 45.5% between 2010 and 2020. The growth is among the fastest rates in all healthcare jobs. As a result, as the demand grows for sonographers, so will the salaries (BLS). The attractive salaries and flexible work hours, as well as the diversity of options available and the lack of geographical limitations on employment opportunities, make Ultrasound an attractive career field (BLS). Most employers prefer to hire diagnostic imaging workers with professional certification. Also many insurance providers and Medicare pay for procedures, but only if certified. According to the BLS, Medical Sonography is on its list of the best jobs of 2013. Medical Sonographers can get promoted by certifying in more than one area in ultrasound or having more work of experience being promoted to a supervisor. Anywhere you go this job has a high demand and a fast rate. Due to population hospitals, facilities, or offices will always need medical
The males will sometimes form temporary alliances with other males in order to find a mate. Otherwise, the males are very aggressive with each other when competing for a female. The females have a gestation period of about 12 months. The calves develop their signature whistle as young as one month which allows them to maintain contact with their mother through their nursing period, lasting twelve to eighteen months, and through the following three to six years in which they learn important tasks for survival. Fortunately, their whistle also gives the location and emotional state of the individual dolphin. These dolphins also protect their injured by holding them at the surface of the water and by protecting them from threats.
River dolphins have been an elusive group of cetaceans, taxonomically and biologically, since the time of their first noted observation in the wild. They are proven to have oceanic ancestors which invaded the riverine systems on at least three independent events and hence develop ecological extreme specialization to adapt to the freshwater environment. Although this hypothesis has been challenged, invasion of the freshwater systems might have insured their survival against either competitive exclusion by more recent and better adapted smaller cetaceans or changing physical parameters of the oceanic systems. (Cassens, 2000; Geisler, 2011) (reversal of this may happen due to deteriorating habitat?)
The foundation of the legislation was to impede and discourage the entry of new Chinese immigrants into Canada. Therefore, the process of racialization or what Timothy Stanley terms “biological racism” began . In 1885, the government had fulfilled the promise of completing the national railway to the Pacific coast. Thus, the Chinese Head Tax was implemented . The Chinese Head Tax was fifty dollars in 1885, as a result immigrants wishing to enter Canada would pay the financial burden. Several amendments were made to the Chinese Immigration Act. In 1900, the tax was doubled to $100, and in 1903 an astounding $500 . The head tax was tremendously difficult to pay. Many Chinese had already borrowed money to come to Canada, the additional tax made it impossible to afford. Furthermore, the 1903 head was significantly more than some Chinese worker’s annual
In the past Chinese immigrants were first only seen as a form of cheap labour to create the Canadian Pacific Railway. They were given small sums of money for their work, “Although Chinese played a key role in building the western stretch of the railway, they earned between $1 and $2.50 per day” (The University of British Columbia, n.d.). The government saw the Chinese as nothing more than dogs—so far beneath them that they were not worthy to receive the same amount of pay or recognition as “real” Canadians did. Additionally, Chinese men had to face dangerous and often times fatal conditions because the railway stretched sea to sea, and the terrain that it was built over was hazardous. Their lives were seen as unimportant so the “Chinese workers were delegated the most dangerous construction jobs, such as working with explosives” (The University of British Columbia). They worked all year round, and were unequipped for the cold climate and lack of food; almost as many men died from hypothermia as they did from falling off cliffs or from dynamite blasts. Lastly, even with the highly inadequate pay, many men were still trying to save enough money to one day be able to bring their families over to Canada. This dream was crushed however, when many Canadians demanded Oriental immigration be stopped. Unfortunately, the government conformed to the population’s demands, and after the Canadian
Dolphins, use sonar to navigate through the water, hunt, communicate, and do just about everything. Dolphin sonar involves high frequency bursts of sound created by forcing air through a network of tissues near their blowholes. Catfish, have close to 100,000 taste buds—all over their bodies. In a sense, a catfish is just a big swimming tongue. They have so many taste buds because they're bottom dwellers and site does not help so much. The swellshark is one of the smaller breed of shark, only growing to about 3ft long, roughly the size of a small doberman. Swellshark’s are bottom feeders, preferring to ambush crabs and unsuspecting
...served in his country no matter what race they were. He spent twenty-seven years in jail fighting the government but in the end it all paid off as Mandela defeated the apartheid. Mandela also became a famous, influential activist to many people worldwide. Without Nelson Mandela fighting for equal rights in South Africa, who knows what the country would be like today.
Have you ever wondered what it would be like to be on the U.S Terror Watch List for more than 20 years and then be elected as your country’s president a year after you are removed from this list? This is what Nelson Mandela went through for many years of his life. Although many people have changed the face of government throughout the world, Nelson Mandela had had a huge impact on South Africa’s government system because of his childhood, prison life, and his presidency.
To begin with, physical characteristics should be the first thing to be described. Dolphins are odontocete cetaceans which live constantly in an aquatic environment. Both sides of their brain take turns to work while the other side can rest momentarily. They are able to have communications based on sending each other diverse voices. SeaWorld dolphins and wild dolphins all have smooth and delicate skins. What’s more, they both feed on fishes,