What are the two food sources of deep-water nekton

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Problem

A. Discuss why the rigid gas chamber in cephalopods limits the depth to which they can descend. Why do fish with a swim baldder not have this limitation?

B. Explain why hydrozoans and schyphozoans (jellies) are classified as macroscopic forms of zooplankton. Why are they not considered nekton?

C. From memory, name and describe the different types of fins that fish exhibit. What are the five basic shapes of caudal fins, and what are their uses?

D. Are most fast-swimming fish cold-blooded or warm-blooded? What advantage does this provide?

E. What are the two food sources of deep-water nekton? List several adaptations of deep-water nekton that allow them to survive in their environment.

F. Describe the mechanism by which bioluminescence is accomplished in deep-sea organisms. What is bioluminescence useful for in the marine environment?

G. What are several benefits of schooling?

H. What are the three types of symbiosis, and how do they differ?

I. Besides schooling and symbiosis, what other adaptations do pelagic animals possesses to avoid being prey?

J. What common characteristics do all organisms in class Mammalia share?

K. Describe marine mammals within the order Carnivora, including their adaptations for living in the marine environment.

L. How can true seals be differentiated from the eared seals (sea lions and fur seals)?

M. Describe the marine mammals within the order Sirenia, including their distinguishing characteristics.

N. How can dolphins be differentiated from porpoises?

O. Describe differences between cetaceans of the suborder Odonteceti (toothed whales) with those of the soborder Mysticeti (baleen whales). Be sure to include examples form each suborder.

P. Compare echolocation systems in sperm whales and dolphins. Evaluate the differences and similarities between the two systems.

Q. Describe the mechanism by which baleen whales feed.

R. Describe reasons why gray whales leave their cold-water feeding grounds during the winter seasons.

S. Why did the International Whaling Commission (IWC) invoke a ban on commercial whaling?

T. What three ways exist to legally hunt whales? Which countries are doing each?

Reference no: EM133639399

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