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Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
Bony fish powerpoint
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Bony fish powerpoint

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  • 1. Chapt 10 Bony Fishes Ichthyology “the study of fish”
  • 2. Phylum Chordata• Class Actinopterygii – “modern bony fish” – 25,000 species or ½ of all vertebrate species – So diverse no one characteristic can differentiate them from sharks, skates, and rays (cartilaginous fish) – Taxonomy of fishes are still changing as new technology and research reveal new characteristics
  • 3. Phylum Chrodata• Characteristics – Presence of swim bladder or lung – Bones – Bony scales – Fin rays
  • 4. 2 major groups• Subclass Chondrostei • Subclass Neopterygii – Heterocercal tail – Homocercal tails – Skeleton made mostly of • Backbone does not cartilage extend into tail – Ganoid scales – Cycloid OR Ctenoid • Armored appearance scales • Florida Gar • Both are thinner and more flexible than ganoid scales
  • 5. Body Shapes-determined by habitat• Fusiform- streamlined shape for active swimmers• Laterally compressed- flattened so can maneuver though corals• Flattened: bottom- dwellers• snakelike: burrowing fish
  • 6. Respiration and Circulation
  • 7. Respiration• Gills: receive oxygen and remove CO2, and maintain salt balance – Made of gill filaments: blood flows in opposite direction of incoming H2O• Water must continuously pass over gills – Meets with blood with lower O2 and higher CO2 • Diffusion moves from where to where????? – Fish actually “pump” H2O over gills
  • 8. Cardiovascular• Close circulatory system: Heart, veins, arteries – Most complex we’ve seen so far! – 4 chambered heart • Draw diagram in your notes• What does it mean to have an open circulatory system?
  • 9. Swimming and Movement
  • 10. Muscle Contractions• W shaped bands of muscle• Movement occurs when muscle contracts. – Alternate from one side to the other – Starts at anterior and travels to posterior end• Contractions start at different areas in the body for different fish = different swimming patterns.
  • 11. Staying neutrally bouyant• Buoyancy – Swim bladder: gas filled sac; add and remove to adjust buoyancy • SCUBA divers must adjust air in BCD for same purpose – To go down: let air/gas out – To go up: add air/gas
  • 12. Fish Coloration5 important types you need to know
  • 13. Important to fish survival• Help the fish to – Find food – Communicate – Attract mates – Defend itself from predators – Recognize species – Conceal themselves• Pigments: found in cells called chromatophores
  • 14. Different types• 1. Structural colors – Produced by light reflecting from crystals located on chromatophores• 2. Obliterative Countershading – Found on fish living in pelagic zone (open ocean) – Dark on the top and white on the bottom – Why?
  • 15. More types..• 3. Disruptive Coloration – Distract predator – Lines, stripes, fake eyes • Trying to aim predator in the wrong direction• Cryptic Coloration – Sneaky – Use colors to ambush prey• Poster Colors – Bright, showy colors that advertise territorial ownership or sexual displays
  • 16. Nervous System & Reproduction
  • 17. Nervous System• Brain, spinal cord, nerves• Senses – Olfaction: sense of smell: olfactory pits (nostrils) – Taste: receptors on head, jaws, tongue, mouth and barbels on some fish (catfish) – Hearing: internal ears – Sight: Eyes Lack eyelids • Most set on sides of face: each eye see own independent view.• Lateral Line: Detect movement in water
  • 18. • Vast: depends on species Reproduction – Internal and external sexual reproduction – Some care and protect young, others do not• Perch: separate sexes – Males and females spawn eggs – Early spring in sandy, shallow sediments – Females lay more than 20,000 eggs at a time; male comes afterward to fertilize
  • 19. Perch Anatomy

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