Oceanography
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Scooped by Joshua Yonah
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Bottlenose Dolphins

Joshua Yonah's insight:

There are a lot of interesting things about Bottlenose Dolphins. They are the most studied cetacean in the wild because they live near coasts, and in captivity. Some of these interesting things include how they ride the bow waves of moving vessels, how they can interact with humans, and have adapted feeding strategies to human activities, eating netted fish, and fish discarded by fishermen. "Bottlenose Dolphins." National Marine Mammal Laboratory. N.p., n.d. Web. 23 Sept. 2013. <http://www.afsc.noaa.gov/nmml/education/cetaceans/bottlenose.php >. There is a world of information to come soon, which I will be writing about.

 

Since these dolphins are so common, it is easy to find information on them compared to the La Plata. Bottlenose can be found all over the world (except Polar Regions of course), but are still considered an endangered species. (NOAA Fisheries. N.p., 8 Aug. 2013. Web. 3 Nov. 2013. <http://www.nmfs.noaa.gov/pr/species/mammals/cetaceans/bottlenosedolphin.htm>.)

 

These dolphins like to play and dance on bow waves when ships go by. This is one of their favorite things to do, although its not good for them to get too close since they can be injured by the boat, or the fan beneath it. It is fun to watch them do this, and you can see a picture of them here. (Mangiafico, Joe. NOAA Ocean Explorer. N.p., 29 Sept. 2012. Web. 3 Nov. 2013. <http://oceanexplorer.noaa.gov/explorations/12midatlantic/logs/sept29/media/dolphins.html>.)

 

Keep in mind that humans should not feed any wild dolphins that are found. It is claimed that this interfears with their diet, and causes them to not fear humans. (Don't Feed Wild Dolphins. N.p., n.d. Web. 3 Nov. 2013. <http://www.dontfeedwilddolphins.org/>.)

 

Bottlenose can swim at very fast speeds, such as going 26 kilometers per hour. There have been reports of dolphins that can even go from 30 to 80 kilometers per hour too. This is why sharks are an easy prey for them, because they can swim at extremely fast speeds, and ram them. (Baker, Mary L., Mark Carwardine, Richard Ellis, and Margaret Klinowska. "The Bottlenose Dolphin." Dolphins: The Oracles of the Sea. Ed. Vincent O. Bradford. N.p., 29 Aug. 1998. Web. 3 Nov. 2013. <http://library.thinkquest.org/17963/genus-Tursiops.html>.)

 

Bottlenose are also protected by the MMPA. This is a good thing, because it will prevent them from going extinct. We need acts like this for all kinds of animals, and sadly, this is more of a cost thing. At least the dolphins will be protected. (NOAA Fisheries Service. N.p., 18 Mar. 2013. Web. 3 Nov. 2013. <http://sero.nmfs.noaa.gov/pr/mm/dolphins/bdconservation.htm>.)

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La Plata Dolphins

Joshua Yonah's insight:

The La Plata Dolphins are also known as the franciscana river-dolphin. There are a lot of interesting things about this species, such as their extreme shyness, and evasiveness. These dolphins also have the longest beaks of any dolphin; have the nickname "the white ghost" due to their light colored bodies; are considered primitive because of their interlocking teeth and poor eyesight; and are limited to their distribution to temperate and coastal waters of eastern South America. "La Plata Dolphins." National Marine Mammal Laboratory. N.p., n.d. Web. 23 Sept. 2013. <http://www.afsc.noaa.gov/nmml/education/cetaceans/laplata.php >. More information about these fascinating creatures will be coming soon.

 

La Plata Dolphins can be found in a remote spot in South America. This is why they are so rare and unique, and what I like about them. They are primitive dolphins, and have special features. (de Moura, Jailson Fulgencio, Rodrigues, Éderson da Silva, Thais Guimarães Corrêa Sholl, and Salvatore Siciliano. "Franciscana dolphin (Pontoporia blainvillei) on the north-east coast of Rio de Janeiro State, Brazil, recorded during a long term monitoring programme. ." N.p., n.d. Ebsco Host. Web. 3 Nov. 2013. <http://ezproxy.madisoncollege.edu:2067/ehost/detail?vid=8&sid=456e366b-4eab-4137-836b-b04f31b9fa4c%40sessionmgr114&hid=124&bdata=JkF1dGhUeXBlPWNvb2tpZSxpcCxjcGlkJmN1c3RpZD1zNjI0NjgxMiZzaXRlPWVob3N0LWxpdmUmc2NvcGU9c2l0ZQ%3d%3d#db=a9h&AN=57425043>.)

 

Since these dolphins are endangered, we have to be really careful with them. They are occasionally hunted for oils in different countries, and killed in nets. This has happened over the years. (Prado, J.H.F., E.R. Secchi, and P.G. Kinas. "Mark-recapture of the endangered franciscana dolphin (Pontoporia blainvillei) killed in gillnet fisheries to estimate past bycatch from time series of stranded carcasses in southern Brazil. ." N.p., n.d. Ebsco Host. Web. 3 Nov. 2013. <http://ezproxy.madisoncollege.edu:2067/ehost/detail?vid=3&sid=456e366b-4eab-4137-836b-b04f31b9fa4c%40sessionmgr114&hid=124&bdata=JkF1dGhUeXBlPWNvb2tpZSxpcCxjcGlkJmN1c3RpZD1zNjI0NjgxMiZzaXRlPWVob3N0LWxpdmUmc2NvcGU9c2l0ZQ%3d%3d#db=a9h&AN=89249042>.)

 

Because of their name, many people may mistake that these animals live in the La Plata River. This may not be the case since there is a place known as Buenos Aires, Argentina, which is also called La Plata. ("La Plata dolphin." . N.p., n.d. Ebsco Host. Web. 3 Nov. 2013. <http://ezproxy.madisoncollege.edu:2067/ehost/detail?vid=3&sid=6e79cea4-122f-4f77-9c73-9781f556e6d2%40sessionmgr111&hid=124&bdata=JkF1dGhUeXBlPWNvb2tpZSxpcCxjcGlkJmN1c3RpZD1zNjI0NjgxMiZzaXRlPWVob3N0LWxpdmUmc2NvcGU9c2l0ZQ%3d%3d#db=sch&AN=20073219>.)

 

Baby La Plata dolphins go through three stages with their mother. First they suckle milk, then they begin to eat solid foods like shrimp, and then they move on to solid foods without milk from the mother. (Collerone, Stacey. Animal Diversity Web. N.p., 2012. Web. 3 Nov. 2013. <http://animaldiversity.ummz.umich.edu/accounts/Pontoporia_blainvillei/>. )

 

This dolphin has between 208 and 242 teeth. I guess it wouldn't be hard for them to consume food with this many teeth in their jaw. (Franciscana Dolphin: Pontoporiidae - Physical Characteristics. N.p., n.d. Web. 3 Nov. 2013. <http://animals.jrank.org/pages/3126/Franciscana-Dolphin-Pontoporiidae-PHYSICAL-CHARACTERISTICS.html>. )

 

Since this animal is rare and unique, they are surrounded by superstition. I guess this is why they are nicknamed the "white ghost." I would say it fits them since they are shy, and usually evade humans. (Encyclopedia, of Life. "Franciscana." The Encyclopedia of Earth. Ed. Michael C. Hogan. N.p., 1 Apr. 2011. Web. 3 Nov. 2013. <http://www.eoearth.org/view/article/164997/>.)

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