X hits on this document

Word document

Test Bank for Marine Biology: Function, Biodiversity, Ecology 2E - page 15 / 44

2176 views

1 shares

21 downloads

0 comments

15 / 44

Species with planktonic larvae, whose adults live successfully only at the upper limit of the intertidal zone

a. Will be able to settle successfully if their planktonic larvae are released for exactly 21 days

b. Will be able to settle successfully if their planktonic larvae are released at spring high tide and swim for 21 days

c. Will settle successfully if they are released in water and develop to the point of settlement in 14 days

d. Will settle successfully if first they are photopositive but are photonegative 14 days later

Settling larvae

a. Require fresh and clean substrates, devoid of bacteria and other organisms

b. Cannot encounter an appropriate substratum, except by being thrust against the bottom by turbulent water motion

c. Can detect dissolved substances several meters away and swim towards them as a settling cue

d. Can detect dissolved substances a few centimeters away and swim towards them as a settling cue

Larvae of estuarine benthic species

a. May leave the estuary, but return depending upon water currents and wind

b. May leave the estuary but never return

c. Never leave the estuary

d. Are never planktonic, so as to prevent washout into coastal waters

Benthic species with planktotrophic larvae

a. Are more common in Antarctic than any where else

b. Reach their maximum diversity in the tropics

c. Are the least common form of dispersal type in the ocean

d. None of the above

Planktotrophic benthic species and migrating fish species have the following in common

a. Both move at least thousands of kilometers

b. Both are completely faithful to specific spawning grounds

c. Both types have, respectively, more than one area to exploit resources

d. Spawning in fresh water, but adult feeding in salt water

Benthic species with planktotrophic larvae

a. Have narrower biogeographic ranges than species with non-planktonic larvae

b. Are found only in the Pacific Ocean

c. Are common in deep sea soft bottoms

Document info
Document views2176
Page views3235
Page last viewedSun Dec 04 13:11:51 UTC 2016
Pages44
Paragraphs1406
Words10379

Comments