slide1
Download
Skip this Video
Download Presentation
Swimming & Locomotion

Loading in 2 Seconds...

play fullscreen
1 / 30

Swimming & Locomotion - PowerPoint PPT Presentation


  • 178 Views
  • Uploaded on

Swimming & Locomotion. Major types of locomotion in fishes. Walking frogfishes Crawling sea robins Swimming most fishes. Antennariidae warty frogfish Antennarius maculatus. The swimming mechanism. Muscles Propulsive waves. Swimming modes. Body musculature. Fin musculature.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Swimming & Locomotion ' - lona


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
major types of locomotion in fishes
Major types of locomotion in fishes
  • Walking
    • frogfishes
  • Crawling
    • sea robins
  • Swimming
    • most fishes
slide3

Antennariidae

warty frogfish

Antennarius maculatus

the swimming mechanism
The swimming mechanism
  • Muscles
  • Propulsive waves
slide5

Swimming modes

Body musculature

Fin musculature

s wimming examples
Swimming examples

Thunniform – Carangiform swimming

Labriform swimming

slide10

Red

Epiaxial or dorsal

muscles

hypaxial or ventral

muscles

distribution of red muscle1
Distribution of red muscle

Bluefin tuna

Ectotherm

fishes

Red

muscle

Mako shark

Skipjack tuna

slide15

Propulsive wave

    • Progressive tailward passage
    • Push force
    • Reactive force
    • Forward thrust component
    • Lift or slippage component

P

T

R

L

slide17

Swimming Forces

Thrust - Drag

Gravity - Lift + Buoyancy

lift force
Lift Force
  • Static lift
    • Swim bladder
    • Lipids / Oils
  • Dynamic Lift
    • Pectoral fin rotation
    • Pectoral hydrofoil shape
drag forces i
Drag forces I
  • Frictional or Viscous Drag
    • Boundary layer: non-moving water layer that creates friction with surrounding water
    • Not speed related
    • To reduce frictional drag:
      • Mucous
      • Reduction surface area
      • Ctenoid scales
      • Placoid scales
slide22

Ctenoid scales

Placoid scales

drag forces ii
Drag forces II
  • Pressure or Inertial Drag
    • Caused by pressure differences
    • Drag increases with speed
    • To reduce pressure drag:
      • Streamline shape
        • Width-length ratio = 0.25
        • Thickest cross-section 2/5 from mouth
        • Long and narrow wing-like pectoral fins for lift
        • Body depressions for retracting paired & median fins
slide28

Caudal fin shapes high/medium aspect ratio (carangiform swimming)

Carangidae

Jacks

Caranx melampygus

slide29

Caudal fin shapes low aspect ratio (subcarangiform swimming)

Serranidae

Nassau grouper

Epinephelus striatus

ad