Week 3
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Week 3. 3.1 –Reproduction, senses and communication 3.2 – Reproduction, senses and communication. Chapter 20-21-22: Sensory Biology. Fish Eye. A fish’s view through the water surface. Specialized eye placements. Anableps. Periophthalmus. No eyes. Third eye.

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3.1 –Reproduction, senses and communication 3.2 – Reproduction, senses and communication

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Week 3

3.1 –Reproduction, senses and communication

3.2 – Reproduction, senses and communication


Chapter 20-21-22: Sensory Biology


Fish Eye


A fish’s view through the water surface


Specialized eye placements


Anableps


Periophthalmus


No eyes

Third eye


Chapter 21 – Hearing, Balance, lateral line and electricity


Otic Region of the Skull


Inner Ear of a bony fish


Otolith


Neuromast organ (hair cell)


Weberian Apparatus

Ostariophysian fishes


Herring, anchovies, sardines….


Lateral Line


Trunk and cephalic lateral line

ratfish


Lateral Line


Electrosensory systems


Passive electrosensory systems


Ampulla of Lorenzini


Active electrosensory systems


Active electrosensory systems


Mormyridae (Osteoglossomorpha)


Magnetic field sensors?


Electrical Generation


Strong dischargers


Strong dischargers

Electric ray

Electric stargazer


Electric eel

Strong dischargers

Electric catfish


Weak dischargers

gymnotids

mormyrids


Weak dischargers

some rays

electric eel


Fishes and sound


stridulation

drumming


Trichopsis

Croaking gourami


Chapter 22 – Chemosenses – Olfaction, taste and misc.


Taste (gustation)

Olfaction


Olfaction

Olfactory rosette


External nares


Olfactory structures – basic anatomy


Olfactory rosette


Internal nares (choanae)

lungfish


Deep sea angler fish


Taste (gustation)


Taste bud


Chapter 23 – A bit about feeding and food


Tooth bearing bones in fishes


Gill rakers


Basking shark

Herring


Pharyngeal Jaws


Pharyngeal Jaws


Digestive tract


Digestive tract

Herbivorous fish

Lamprey


Chondrichthyes and lower bony fishes


Chapter 25 – Osmotic Balance


Marine

Both

Freshwater


Aquatic Tetrapods


Saltwater fish

Freshwater fish


Freshwater fishes


Scales

Armor


Lampreys

Freshwater

Teleosts

Elasmobranchs


Freshwater Teleost

Hypo-osmotic to environment


Hagfish


Marine Elasmobranch


Latimeria (living coelacanth)


Marine Teleost

Hyperosmotic to environment


Diadromy


Anadromous


Catadromous


Coastal Marshes


Tidepools


“Seawater Farms

Bringing Life from Deserts and Seawater”

tilapia


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