Toma DrashkovToma Drashkov

Robert KardjalievRobert Kardjaliev

Neda ValchevaNeda Valcheva

10/610/6

CirculationCirculation

• Oxygen poor blood from sinus venosusOxygen poor blood from sinus venosus

• AtriumAtrium

• VentricleVentricle

• Oxygen poor from conus arteriosus to get oxidized by gills Oxygen poor from conus arteriosus to get oxidized by gills and then goes to the rest of the bodyand then goes to the rest of the body

DigestionDigestion

• Food is broken first in esophagusFood is broken first in esophagus

• In stomach the pyloric caeca secretes enzymes, In stomach the pyloric caeca secretes enzymes, absorbs nutrientsabsorbs nutrients

• The cycle ends in the intestinesThe cycle ends in the intestines

MovementMovement

• Muscles, Fins, SkeletonMuscles, Fins, Skeleton

• S movementS movement

• Very aerodynamic formVery aerodynamic form

• Liquid secreted to minimize dragLiquid secreted to minimize drag

•http://www.youtube.com/watch?v=GUtajoVi8qw

InterestingInteresting

• Fish have a vision as good as oursFish have a vision as good as ours• Have ears, cannot hear very wellHave ears, cannot hear very well• Sense gentle currents, vibrations, Sense gentle currents, vibrations,

movementmovement• Some (shark, catfish) detect low Some (shark, catfish) detect low

electric Currentselectric Currents• Some (electric eel) produce electric Some (electric eel) produce electric

current current

Main GroupsMain Groups

• Not a single clade, but 3 main groupsNot a single clade, but 3 main groups

• Agnatha - jAgnatha - jawless primitive fishawless primitive fish

• ChondrichthyesChondrichthyes – jawed fish; – jawed fish; cartilaginous skeletonscartilaginous skeletons

• Osteichthyes - bony fish; fish with Osteichthyes - bony fish; fish with bony skeletons bony skeletons

SymmetrySymmetry

• Some fish have bilateral symmetrySome fish have bilateral symmetry

• However, not all – they come in all However, not all – they come in all shapes and sizes as can be seen in shapes and sizes as can be seen in (a) and (b)(a) and (b)

http://image.tutorvista.com/content/animal-kingdom/cray-fish-and-hydra-symmetry.jpeg

http://image.tutorvista.com/content/animal-kingdom/cray-fish-and-hydra-symmetry.jpeg

General Things About FishesGeneral Things About Fishes

• Live underwater in both fresh and salt waterLive underwater in both fresh and salt water

• Free swimming or laying on the bottom of Free swimming or laying on the bottom of the seathe sea

• Not a single clade; 3 main groupsNot a single clade; 3 main groups

• Their way of breathing is different from that Their way of breathing is different from that of other species due to their living of other species due to their living underwaterunderwater

• They come in a plethora of shapes and sizesThey come in a plethora of shapes and sizes

• Have different ways of reproducingHave different ways of reproducing

AgnathaAgnatha

• Petromyzon marinusPetromyzon marinus or sea lampreys live in the or sea lampreys live in the Great Lakes in North AmericaGreat Lakes in North America

• Live for 10 years and feed off from the blood and Live for 10 years and feed off from the blood and tissue of teleost fishestissue of teleost fishes

• Eggs-> blind & toothless larvae-> live burried in Eggs-> blind & toothless larvae-> live burried in mud, filter-feeding->metamorphosize mud, filter-feeding->metamorphosize into adults and turn into their into adults and turn into their parasitic form -> spawn 60-70parasitic form -> spawn 60-70thousand eggs-> diethousand eggs-> die

ChondrichyesChondrichyes

• The Great White Shark, The Great White Shark, Carcharodon carchariasCarcharodon carcharias, , can be found in coastal surface area in all oceanscan be found in coastal surface area in all oceans

• Live 30-100 years longLive 30-100 years long

• Largest predatory fish – up to 6 meters longLargest predatory fish – up to 6 meters long

• No natural enemies other than humansNo natural enemies other than humans

• Not much known about their life Not much known about their life cycle except that they give birth cycle except that they give birth to 2-14 baby sharks and migrate to 2-14 baby sharks and migrate oftenoften

OsteichthyesOsteichthyes

• Pacific Salmon, Pacific Salmon, Oncorhynchus, Oncorhynchus, from the from the Salminodae family live in the Great Lakes and the Salminodae family live in the Great Lakes and the Pacific OceanPacific Ocean

• Food diet depends on where they live; generally, Food diet depends on where they live; generally, zooplankton and smaller fisheszooplankton and smaller fishes

• Born in fresh water but migrate and spend most of Born in fresh water but migrate and spend most of their life in salt watertheir life in salt water

• Have six life cycle stages eggs-> Have six life cycle stages eggs-> alevin-> fry-> smolt-> adult-> alevin-> fry-> smolt-> adult-> spanwerspanwer

• Used as foodUsed as food

Works CitedWorks Cited

• http://www.marinebiology.org/fish.htm#FISH%20Definition

• http://en.wikipedia.org/wiki/Fish

• http://www.aqua.org/images/animals_details/electriceel.jpg

• http://static.howstuffworks.com/gif/shark-eat-1.jpg

• http://en.wikipedia.org/wiki/Lamprey

• http://en.wikipedia.org/wiki/Sea_lamprey

• http://www.glsc.usgs.gov/main.php?content=research_lamprey&title=Invasive%20Fish0&menu=research_invasive_fish

• http://en.wikipedia.org/wiki/Great_white_shark

• http://www.sharkresearchcommittee.com/interactions.htm

• http://en.wikipedia.org/wiki/Salmon

• http://209.85.129.132/search?q=cache:87pdjIsLLNAJ:www.vanaqua.org/education/http://209.85.129.132/search?q=cache:87pdjIsLLNAJ:www.vanaqua.org/education/aquafacts/salmon.html+what+does+salmon+eat&cd=1&hl=bg&ct=clnk&gl=bgaquafacts/salmon.html+what+does+salmon+eat&cd=1&hl=bg&ct=clnk&gl=bg

• http://it.stlawu.edu/~fwbio/salmon.htmlhttp://it.stlawu.edu/~fwbio/salmon.html

• http://209.85.129.132/search?q=cache:wY8byn5J7oYJ:business.virgin.net/fly.shop/http://209.85.129.132/search?q=cache:wY8byn5J7oYJ:business.virgin.net/fly.shop/salmon-Pacific.html+latin+name+of+pacific+salmon&cd=2&hl=bg&ct=clnk&gl=bgsalmon-Pacific.html+latin+name+of+pacific+salmon&cd=2&hl=bg&ct=clnk&gl=bg