fish reproduction

What is oviparous

Eggs are laid and embryos develop outside the mother’s body

What is **ovoviviparous**.

eggs which are __hatched__ within the body of the parent,

What is spawning?

When adults come together to release their gametes into the water at the same time.

Benefits of spawning?

Increases chance of fertilization. More embryos will form meaning more chances of escaping predators

Life stages of a fish

Egg, Larvae, Fry, Juvenile, adult

Fry vs juvenile?

* **fry-** A few months old + Ability to feed on their own
* **Juvenile - N**ot yet sexually mature

Function of gills?

Allow a fish to absorb dissolved oxygen from the water.

Types of water for fish

Cold water (freshwater) - 10-26 Celsius

Tropical (freshwater) - 21 - 29 Celsius

Tropical marine (salt) - 21 - 29 Celsius

Senses

Sight

Hearing

Smell

Tate

Touch

Electroreception

What is electroreception?

Ability to detect weak electric fields in water - detected by lateral line (ampullae of lorenzini)

What are live bearers

Males have a copulatory organ (modified anal gland) that they will insert into a female fish

female will store milt for months

eggs will hatch inside mother - live young

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What is line breeding?

Process of breeding fish who are related to get desirable traits

benefits of mouth brooding

Keeps offspring safe from predators