A sawfish is an endangered fish that is related to sharks and rays. In America, these fishes are critically endangered which means it is almost close to extinction. Now they live mostly in the waters off the Southwest Florida. There are 7 different types of sawfish: Pristis pristis (common sawfish), Pristis perotteti (largetooth sawfish), Pristis microdon (freshwater sawfish), Pristis pectinata (smalltooth sawfish), Pristis clavata (dwarf sawfish), Pristis zijsron (green sawfish), and finally Anoxypristis cuspidata (narrow or knifetooth sawfish). All of them are on the IUCN (International Union for Conservation of Nature) red list.
Arizona Free Enterprise Fund v. Bennett and McComish v. Bennett 2011. 564 U.S. ___ 2011. Accessed at http://www.supremecourt.gov/opinions/10pdf/10-238.pdf. November 5, 2011. Barnes, Robert.
The Columbia Electronic Encyclopedia, 2007. Web. 24 Mar 2011. <http://www.factmonster.com/ce6/people/A0831198.html>. "The Influence of Sea Power upon History."
26 June 2009. Web. 18 Mar. 2011. <http://iopal.net/forum/showthread.php?t=4959>.
They were overhunted in the 18th and 19th centuries and their population dropped from 300,000 worldwide to only a few thousand in Alaska. (Cohn, 1998) The 1911 International Fur Seal Treaty saved the otters and other marine mammals from extinction. (Bodkin 2002) The sea otter population is very important to many parts of the ocean’s ecosystem because they help keep sea urchin populations at a safe level. Too many sea urchins mean decreased kelp beds. Beyond the overhunting, there are many other threats to the sea otter population.
Taking into consideration the fact that one can never really do "too much" to benefit a situation as such, Lake George and it's officials, as well as it's local inhabitants, could be doing a lot more. Most importantly, there is a sufficient lack of public education and awareness at local marinas about the precautions needed to be taken when boating in "zebra infested" waters. Boating, diving, fishing, and numerous other water activities contribute to the spread of zebra mussels, as a means of there survival includes strongly adhering themselves to hard surfaces submerged in the water, such as boat hulls, scuba diving equipment, and fishing gear. Because of this, local marinas should enforce proper decontamination efforts. Unfortunately, from personal experience, I can vouch for that fact that these efforts are commonly overlooked.
Web. 29 Oct. 2011. . "Quipu." Wikipedia, the Free Encyclopedia. Web.
On the other hand, if you just let the krill continue to become more and more populated, they could become overpopulated and become uncontrolled because there would be too many of them. In my opinion, harvesting krill can go both ways. Good and bad. Good because without it they would become overpopulated. Bad because if they go extinct, some animals would be without a food source.
With highly migratory species like bluefin tuna, management is complicated because these species migrate thousands of miles across oceans and international borders and are fished by many nations. Unfortunately humans are also hunting the majestic bluefin Tuna; not only are they being hunted but they are almost extinct due to the amount of human predation. Commercial fishing is the reason the bluefin Tuna is listed as critically endangered and needs to be conserved. There are some unique characteristics about this specific fish. The bluefin tuna are warm blooded, a rare trait among fish.
This paper will explore the food which has driven up the cost of the bluefin tuna as well as four of the methods in which the bluefin tuna is being harvested from the ocean and sold for profit. It will also discuss how these methods are detrimental to the sustainability of this fish’s existence and to the fishermen who earn a living through the bluefin tuna. Before it is to late, the bluefin tuna needs to be put on the protected species list and a long-term fishing moratorium needs to be put in place. Guidelines need to be put in place and enforced to protect the many other species of tuna before a moratorium is placed on fishing the bluefin tuna. Fishermen will inevitably increase the catch amount of the other species of tuna in order to maintain their way of making a living.