Reproduction

Question 1

Sexual vs Asexual

Answer 1

Sexual you loose half genetic but leads to mutation

Asexual you keep all genetics but loose more energy

Question 2

Types of sexuality

Answer 2

Gogonochorism-Two sexes, triggered by a few starting, also envermental condtions

hermaphroditism- two types SPERM IS CHEAP

• -protandrous – male to female (most common in invertebrates)
• -protogynous – female to male (coral reef fishes)

Asexuality- colonies, all your own, easy to get food

Question 3

Migration

Answer 3

anadramous – spend life in sea, return to freshwater to bred (usually die afterwards)

catadromous – spend life in freshwater and go to sea to breed (eels)

Question 4

Larval development

Answer 4

Planktonic- smaller eggs more reliable

Lecithotrophy- (only start as a plankton) food is easer to come by

Direct- no planktonic stage

Question 5

Competency

Answer 5

larvae that have developed the ability to metamorphose. In most cases these larvae gain the ability to sense and respond to specific cues

Allows for better growing conditions

Question 6

Adaptations for substrate selection

Answer 6

1) adapt of the physical differences-sand vs mud
2) avoid competition with adults
3) find organisms that will help you- ribbed muscles and Alternafloura
4) find bacterial films

Question 7

What effects settlement

Answer 7

Availability of larvae

Settlement cues

Hydrodynamic factors

Larval behavior

Question 8

Problems for larval forms

Answer 8

1) food shortages
2) wastage of larva
3) predation of larva
4) avoidance of crowding