School size of Hourglass dolphins (Lagenorhynchus cruciger) affects predation Introduction The hourglass dolphin (Lagenorhynchus cruciger) is a pelagic marine dolphin which is circumpolar in the southern in both Antarctic and subantartic waters, from about 45°S to 60°S. (William F. Perrin, 2008). There is not enough data to determine with certainty the specific characteristics and traits of these species; as less than 20 specimens have been measured (Thomas A. Jefferson, 2015); however, from observation and sightings in is known that hourglass dolphins (Lagenorhynchus cruciger) tends to travel in groups, with a school size ranged between 1 and 60 animals, with a mean of 7 animals. (William F. Perrin, 2008). Like many other dolphins of the same family (Delphinidae) the hourglass dolphin (Lagenorhynchus cruciger) depend upon echolocation for prey localisation and orientation. Echolocation is the detection of an object by means of reflected sound (Allaby, 2014). Hourglass dolphins (Lagenorhynchus cruciger) produce echolocation click of high source level, which enable them to detect prey at more that twice the distance compared to the Hector …show more content…
If a school of a large size feeds more often than a school of a small size during the day or night, then the null hypothesis is rejected. If a school of a small size feeds more often than a school of a large size during the day or night, then we fail to reject the null hypothesis. If a school of a small size feeds equally as much as a school of a large size during the day and or night, then we fail to reject the null hypothesis.
One of the most common dolphins that are found in southern California is the bottlenose dolphin (Kelly). The bottlenose dolphin is mainly found in coastal waters between 45 degrees north and 45 degrees south, also in Northern Europe waters. It is believed that there are two types of bottlenose dolphin regional wise: oceanic form and coastal form. This species is studied the most by biologists (Jefferson). The coastal population lives in fairly open groups with twenty or less in a pod, some groups are found to contain more in open ocean. It is not uncommon for these species to interact and breed with other species, as would a human interact with other diverse humans. The dolphins feeding behavior is adapted to the availability of resources. They sometimes are known to work together to catch fish from large schools, they also trail behind large fishing boats to catch what falls behind (Leatherwood).
Also if Oak Creek High School has off-campus lunch, the school would save more money. By letting the student body have an open campus lunch, the school would be required to spend less money for clean up supplies, equipment, and for maintaining the cafeteria. The less that’s spent and the more that’s saved will allow more money to be available. There could be more money for extra-curricular activities, sports, and clubs. The money could be used t...
Bottle-nosed dolphins are an extremely adaptable mammal. For example, the Atlantic Ocean form tends to be a little smaller and stockier with a shorter rostrum (nose) compared to the Pacific form. In Scottish waters, Bottle-nosed dolphins are chubby with a dark gray complexion, while the in Australian waters, Bottle-nosed dolphins are thin, light gray appearance, with a dominant circle around each eye. The reason why this dolphin may change its physical appearance is because there may be more fish in Scotland, or the prey may be a slower breed, making the Bottle-nosed dolphin not work as hard for its food, therefore creating a chubbier breed of Bottle-nosed dolphin compared to other parts of the world. Bottle-nosed dolphin have recently been introduced and are now bonding with hum...
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...
The Pacific white sided dolphin is very beautiful. Their backs are dark black while their sides have a light thin-ish gray with narrow white stripes that expands from overhead the eye along the sides, broadening them towards the tail.Their stomach is however white. They have black beaks that are slightly hooked at the curved and a dark gray, almost a black ring is their throughout each eye. Their dorsal fins are long and pointy hooked, they are found at the middle point of their backs. The edge is a dark black and the hind part of their portion is gray usually light. Their flippers are compacted and are spiraled and circumnavigated at the extremity.Their tails are carved at the midpoint. They move in pods of 2-40 dolphins in a group.
Wilde, Parke, and Mary Kennedy. "The Economics Of A Healthy School Meal." Choices: The Magazine Of Food, Farm & Resource Issues 24.3 (2009): 25-29. Academic Search Complete. Web. 14 Feb. 2014.
The traits and behaviors of the bottlenose dolphin are very unique and often exceed the abilities of humans. Similar to humans, the dolphins have excellent eyesight which allows them to see above and below water. Their hearing, however, is something that exceeds humans and even dogs and cats. Through echolocation, the dolphins are able to have a sound frequency of 120 kHz. Dogs and cats, that have better hearing that humans, only reach 45 kHz for dogs and 65 kHz in cats. Humans with the most extraordinary hearing only have the ability to reach 20
The majority of small tooth whales are called dolphins. “Dolphins are mammals of the order Cetacean and the families Plantanistidae and Delphinidae and include about 50 species” (Internet 1). Most dolphin species are about 6 feet in length, the males averaging 4 to 8 inches longer than females. The longest dolphin, the bottle-nose dolphin, can reach over nine-feet in length and weight up to 440 pounds. The smallest dolphin species is the buffalo which is found in the Amazon River. The Buffalo dolphin rarely grows over 3.9 feet or weighs more than 66 pounds.
Around half of the students who receive free and reduced lunch also receive free and reduced breakfast and 90% of school who participate in the NSLP also have a breakfast program (FRAC, 2015). However, there is still that 10% of schools who have a free and reduced lunch program who do not have a breakfast program and therefore students who are most likely experiencing hunger on a daily
While learning does not end when school is out, neither does the need for good nutrition (“Benefits”, n.d.). Good nutrition is very beneficial to children, especially school age children. Not only does it provide nutritional benefits to help with their growth process, it also enhances their learning process. Senate Bill 89 (SB 89), passed in the 83rd regular session, ensure that low income children acquire free meals in the summer when school is not in session. Although, SB 89 ensures nutritious meals for children in the summer, the bill does not go far enough. The bill failed to take into account the following; transportation issues, the number of days the program operates weekly and the statutory requirement that only school districts with fifty percent (50%) or more of their students qualifying for the free and reduced lunch program are required to implement the program. Besides the above listed problems, the implementation of the bill faces a major barrier to participation and lack of awareness.
The dolphin is quite interesting. They have a high and falcate (curving) dorsal fin. The flukes from tip to tip are up to twenty-four inches long, or two feet long. ...
Dolphins are capable to see alongside them, in forward-facing of them and in addition behind them for the reason that their eyes are positioned sideways, one eye on each side of the skull. Dissimilar of human eyes, which they work together to observe objects in their scope of image, a dolphin's eyes work self-sufficiently. One pupil might be gazing closely at something whereas the other pupil is comfortable and
There are many diverse ways to consume a healthy diet. An imperative way in which healthy food should be consumed is through breakfast. Everyone has heard the saying ‘breakfast is the most important meal of the day.’ But why is it so important and what are the benefits? Breakfast consumption is associated with positive outcomes according to the Health and Academic Achievements article by Eide (2010). He advocates that “children’s participation in school breakfast programs has been directly associated with increased academic achievements and improved cognitive performance.” This depicts that breakfast as part of a healthy eating campaign is an important factor in improving children’s educational outcomes. Eide also put forward that skipping breakfast has an influence on performance as a decreased cognitive performance is shown in students in which their alertness, attention and memory become slower than when they have had breakfast. This illustrates the direct link healthy eating has as it demonstrates the benefits and drawbacks of consuming breakfast and not consuming breakfast in the mornings. However this isn’t sufficient enough evidence to prove a healthy breakfast improves the achievement of primary school children. Hattie (2013) published a journal on Epidemiology and Community Health and found that free school breakfast programmes (SBPs) do exist in a number of high-income countries, but their effects on educational outcomes have rarely been evaluated in randomised controlled trials, therefore he wanted to investigate whether having a healthy breakfast impacted children’s educational outcomes. The way in which Hattie conducted his investigation was through a 1-year stepped-wedge, cluster randomised controlled trial. The location of the investigation was predominantly within New Zealand
The most common problem in school rules is the lunch program that they now have. Students in which are currently complaining they are not receiving enough to eat at school. The students are not liking the fact that there is no other choices to pick from anymore. These students are hardly feeling full from these meals. These young age children, and teenagers are required to be receiving the right amount of food. So that children, and teenagers are acquiring the required amount of nutrients that they need to grow, and to be stronger.
Dolphins have been charming creatures to human for centuries. However, this popularity sometimes directly leads to cruel and barbaric ways to keep them in captivity. This condition change dolphins a lot. Although they are the same animals, there exist many differences in habits, living conditions and human effects on the dolphins in the wild and in SeaWorld, which will be illustrated as follows.