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Common Sawfish, Tess Murray 9-02

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Tess Murray

on 1 February 2011

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Transcript of Common Sawfish, Tess Murray 9-02

Saw Fish Adaptations
Structural

The sawfish has a saw like snout. It uses its saw to grub for invertebrate in the seabed’s. They also use the saw to slash through schools of small fish to scare and kill them for food; to do this it whips its saw back and forth.

A female sawfish is ovoviviparous which means it produces eggs that grow and develop and then hatch within the females body. After five months the mother gives birth to the average of eight pups.

An interesting structural adaptation that the sawfish has is that it is considered to be an osmoregulator, which means it, can live in any type of water conditions. The sawfish lives in salt water, brackish and fresh water. This helps it adapt to all types of different creatures and organisms Behavioural

For a defence mechanism the sawfish uses its saw to fight off creatures much larger then itself. It whips its saw and puts large wounds into its enemies. Its senses when its enemies are around and it starts to whip its saw for protection.

When the mother Sawfish is giving birth to her pups the pups saw is flexible and covered in fibrous tissue so it does not hurt the mother while she is giving birth. Shortly after birth the saw hardens and the fibrous tissue wears away.

The sawfish is pretty sluggish and a slow swimmer. When it comes to getting food a behavoural adaptation it has is when plowing through any type of obsticles its saw shakes so it can get through. When it shakes its saw it usually stabs organisms that it can eat. Sawfish
Benchmark Books
http://books.google.ca/books?id=w0SYTS7mmU4C&pg=PA484&lpg=PA484&dq=common+sawfish+adaptations&source=bl&ots=LaqQ1TLOYU&sig=o8j37BfavokQWhxhvwSvJ-Jium4&hl=en&ei=uO0ITe69CpL0tgPPldjVDg&sa=X&oi=book_result&ct=result&resnum=4&ved=0CB8Q6AEwAw#v=onepage&q&f=false

Freshwater Sawfish
Aquarium of the Pacific
http://www.aquariumofpacific.org/onlinelearningcenter/print/freshwater_sawfish/

Smalltooth Sawfish
Posted By STDSEC28
http://smalltoothsawfish.blogspot.com/2008/07/adaptations-of-smalltooth-sawfish.html Common Sawfish
By Tess Murray The sawfishes long sawlike snout Pristis, Pristis is the scientific name for the common sawfish. The Common Sawfish has two closley related speciecs the freshwater sawfish also known as the pristis microdon being one of them. The Freshwater Sawfish was captured in marine waters in King sound and then were released in fresh water rivers in teh western regions of Australia. It does only live in fresh water and is endangered because of tagging-recapture date and collecting information about specimens.

The sawfish is related to sharks and rays. The sawfish is related to the mediteranian fish the Pale Ray scientificly known as the Bathyraja Pallida. This has a ray with a long soft snout. It likes to live deep in the water on the lower parts of the continental slope. The average size is 160 cm long. Like the sawfish the Pale Ray is ovipourus and has egg cases. Related Species http://www.mapress.com/zootaxa/2007f/zt01471p041.pdf Fresh Water Sawfish Sawfish
http://www.worldlingo.com/ma/enwiki/en/Sawfish Pale Ray
http://species-identification.org/species.php?species_group=fnam&menuentry=soorten&id=1040&tab=beschrijving Ray Saw Fish Habitat The common sawfish can live in freshwater and
saltwater. I would say that the common sawfish
has a broad niche because it can adapt to many
different enviroments. It can change where it
lives from fresh to salt water. It lives closer into
shore to moderetly deep water. The deepest it
usually goes is 10m and the shallowest is 1m. It
spends most of its time in the soft bottom mud
inshore. Pristis,pristis
International Union for Conservation of Nature and Natural Resources
http://www.iucnredlist.org/apps/redlist/details/18177/0 The range map Common Sawfish
Ranier Froese and Daniel Pauly
http://www.worldlingo.com/ma/enwiki/en/Common_sawfish Criticaly Endangered The Common Sawfish is critacly endangered. It mainly use to live in the Mediteranian but now there are non in that area. Common sawfish are mainly caught in inshore fisheries with nets and lines set for other species. It lives in places where there are alot of commercial fisheries and it will tend to be taken incidentally wherever it occurs around the fisheries. The saw of the Sawfish is sold in tourist shops. When caught the saw is sent to China for use of medicine. The oils from the Sawfishes liver is used for cosmetics, medicines and soap. There is Nobody is taking action to try and save this speceis, thhere are no projects or conservations to help the Common Sawfish. What if the Common Sawfish
Went Extinct? The Common sawfish is known for eating smaller organisms. It likes to eat its way through schools of small fish. If this creature was extinct the population of smaller organisms would increase. The animals that eat the sawfish are the narrowtooth shark, bull shark and teh tiger shark. If teh Common Sawfish were to go extint then these animals would lose a food source. The population of the Common Sawfish is decreasing quikly and so I think not many things would be affected by if it goes extinct. Sawfish
Benchmark Books
http://books.google.ca/books?id=w0SYTS7mmU4C&pg=PA484&lpg=PA484&dq=common+sawfish+adaptations&source=bl&ots=LaqQ1TLOYU&sig=o8j37BfavokQWhxhvwSvJ-Jium4&hl=en&ei=uO0ITe69CpL0tgPPldjVDg&sa=X&oi=book_result&ct=result&resnum=4&ved=0CB8Q6AEwAw#v=onepage&q&f=false

Pristis,pristis
International Union for Conservation of Nature and Natural Resources
http://www.iucnredlist.org/apps/redlist/details/18177/0


Sawfish
Taylor Sullivan
http://www.flmnh.ufl.edu/fish/gallery/descript/LTsawfish/LTSawfish.html I think a nice comphy habitat for the common sawfish in a zoo would be a nice big tank that only had five meters of freahwater. I would want the bottom to be covered in mud and sand so it feels at home. There would be some plant life and big rocks for it to swim through and around. The Sawfish would get fed small fish each day. In The Zoo
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