1. Marine Ecology Selected Adaptations Let’s set sail for adventure!!!

2. Basic Ecology factors regulating the distribution and abundance of organisms in the ocean. influence of physical and chemical parameters on organisms in the various ecosystems that constitute the ocean.

3. Selected Adaptive Strategies: Bioluminescence Fishes - important nektons Many are deepsea predators Need their own light to attract prey … to attract mates photophores luciferin + luciferase

4. The Blue Planet

5. PREDATOR Fangtooth Striped tuna, Bluefin tuna Marlin Sei whale Manta ray, Ray Pacific Mackeral Spotted Dolphin Sailfish Blue Shark Deepwater crab Wahoo PREY Sardines Flying fish Surgeonfish eggs Yellowfin tuna eggs PLANKTON NUTRIENTS

6. More Nekton Strategies predator/prey must be swift and efficient swimmers move swiftly to –eat –avoid being eaten. Thus fish have evolved to maximize their ability to move through water.

7. Caudal (Tail) Fins most important for speed flared to increase vertical thrust

8. ROUNDED fin (e.g., angelfish) very flexible, slow-speed manuevering

9. TRUNCATE fin (e.g., coho salmon) somewhat flexible, manuevering

10. FORKED fin (e.g., yellow goatfish) somewhat flexible, manuevering

11. The Blue Planet

12. LUNATE fin (e.g., bluefin tuna or blue marlin) very rigid, no good for manuevering, built for pure speed

13. HETEROCERCAL fin (“uneven tail) most of mass & surface area in upper part to produce lift pectorals balance to aid lift, but limits manueverability

14. Caudal Fins rounded –very flexible, manuevering truncate & forked –somewhat flexible, manuevering lunate –very rigid, propulsion heterocercal –“uneven tail” for lift and propulsion

15. Built for Speed speed related to body length –4-foot yellowfin tuna, 46 mph –13-foot bluefin tuna, 90 mph (theoretically) –9-foot porpoise, 25 mph –30-foot killer whale, 34 mph

17. Giant Squid: traps water in mantle and forcefully jettisons it from siphon in head

18. active predator of fish arms to capture tentacles to bring to beak both lined with suckers

19. The Kraken is a legend, but giant squid DO exist! …~20 feet long!

20. Colossal Squid Captured Wellington, NZ, April 2003 330 pounds - 16 feet long Go to the web now matey!!