Birds

Question 1

seabird

Answer 1

entriely dependant on marine environments for at least part of their liufe

Question 2

9 orders of seabird

Answer 2

1. pelicaniformes
   2.suliformes (gannets, cormorants)
   3.procellariiformes (alabtross, petrels)
2. spehenisciformes (penguin)
3. gaviiformes (loons)
4. pheanthontiformes (tropic birds)
5. charadriiformes (gullls, skuas, auks)
6. podicipidofrmes (grebe)
7. anseriformes (waterfowl)

Question 3

charaterictics of seabirds

Answer 3

longevity, iteroparity, delayed maturity, low reproduction, high adult survival, migratory, colonial,large vertical distribution

Question 4

adaptations for matine life

Answer 4

high olfaction, salt balance (can drink seawater), highly developed vsion, feeding

Question 5

how can seabirds drink seawater

Answer 5

Have salt glands in their head toextract salt out of blood using counter current exchange

Question 6

how do seabirds have highly skilled vision

Answer 6

flexible sclera + cornea, nicitating membranre, red oil droplets in cone, fovea centralis

Question 7

5 types of forgaing strats

Answer 7

1. pursuit divers (foot vs wing-propelled)
2. plunge divers
3. surface feeders (dipping/seizing + skimming/filtering)
4. aerial pursuit (kleptoparatism + eating flying fish)
5. scavenging/predation

Question 8

how are seabirds important consumers

Answer 8

• eat fish same amount to fisheries (regulate plankton
• important for nutirent depostion)
• guano enhances productivty

Question 9

threats to seabirds

Answer 9

invasive sp., fisheries, cliamte change, pollution, offshore development