2.+Classificaon+of+fish+2.+traits+ ++3.+Ampullae+of+Lorenzini+detects+electrical+currents+...

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Transcript of 2.+Classificaon+of+fish+2.+traits+ ++3.+Ampullae+of+Lorenzini+detects+electrical+currents+...

1.Ichthyology  –  the  study  of  Fish  

•  2.  Classifica8on  of  fish  – Kingdom  Animalia  

– Phylum  Chordata    – Subphylum  Vertebrata    

1.  Class  Agnatha-­‐  jawless  fish  

•  2.  examples:  lamprey  &  hagfish  •  2.  traits  •      3.  round  mouth  with  studded  teeth  

•      3.  scaleless  

•      3.  collagen  &  car8lage  skeleton-­‐-­‐-­‐-­‐  flexible  

•      3.  no  paired  fins  

•      3.  single  nostril  

Lamprey  -­‐  parasi8c  

hMp://dsc.discovery.com/videos/nasty-­‐by-­‐nature-­‐hag-­‐fish-­‐slime.htmlc  

2.  Class  Chondrichthyes  (car8lage  skeleton  fish)    *  examples:  sharks,  skates,  rays  

2.  traits      3.  Ampullae  of  Lorenzini  detects  electrical  currents      3.  lateral  line  for  balance      3.  placoid  scales  

3.  replacable  rows  of  teeth  

3.  oil  filled  liver  for  buoyancy  

3.  nic8ta8ng  membrane    

MEGALADON  SHARK...  OF  MIOCENE  PERIOD  

3.  internal  fer8liza8on  w/  claspers    

2.  Class  Osteichthyes  –  bony  fish  

 *  gills  w/  operculum  

 *  countercurrent  gas  exchange  

*  some  have  scales/some  not  

 *  mucus  protects  from  parasites  

• Lateral  line  

• Swim  bladder  for  buoyancy  

1.  Which  fish  drink  water  and  why?  

Is  it  the  marine  fish?  Or  the  freshwater  fish?  

Closed  note  test  over  fish  

•  Know  the  parts  of  the  fish  from  the  fish  images.  

•  Be  able  to  match  the  terms  of  the  fish  to  the  func8on  (job).