Auburn University

BIOLOGY 3040

Chapter 7

1)Why do we say that sexual reproduction is expensive?

2. Why do animals disperse?
3. Which animal has, relative to the rest of its body size, one of the largest penises known?
4. In protandry, males have an advantage when small bc productivity does not increase significantly as they get large –
5. Protogyny occurs if a larger male is able to produce more progeny. –
6. Dwarf parasitic males are seen in the brittle star, where a large female carries the smaller male, which is attached to the end of one of her arms. –
7. Speract is a molecule that is released by purple sea urchin eggs to attract sperm. –
8. Mass spawning is a mechanism that generates the spawning of a single species on one night. –
9. Drawbacks of free spawning include
10. What is the name of the special tentacular structures that are used by anemones for fighting?
11. Patterns of migration are dependent upon directed movement of larvae and juveniles from the spawning location to the nursery and the eventual entry into the standing adult stock. –
12. Dispersal refers to an undirected, or randomly directed, release of young across the sea –
13. Tagging studies of humpback whales has revealed breeding areas distinct from summer feeding areas. –
14. What represents a condition where the organism live as adults in fresh water but spawn in salt water –
15. The Atlantic eels can undergo hybridization where they cross paths in the open ocean –
16. The young of the eel is called a leptocephalus larva. It is very thing and nearly clear –
17. Olfaction-blocked blacktip sharks have considerable difficulty migrating to their home range. This is presumably because olfaction is critical for their migration. –
18. Magnetism is a critical sensory mode for sockeye salmon migration. –
19. Planktotrophic larvae are observed to travel in the plankton much farther than lecithotrophic larvae. –
20. Lecithotrophic larvae keeps their levels of fats high by feeding in the water column –
21. Larval behavior can control…
22. If a larva is attempting to target leaving an estuary, which model of behavior would it most likely adopt?
23. Planktotrophic larvae have modifications for swimming, such as ciliated bands, swimming appendages, etc.

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