Tham khảo tài liệu 'geography and oceanography - chapter 24', khoa học tự nhiên, địa lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Marine Ecology Selected Adaptations Let’s set sail for adventure!!! 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. Selected Adaptive Strategies: Bioluminescence Fishes - important nektons Many are deepsea predators Need their own light to attract prey to attract mates photophores luciferin + luciferase The Blue Planet The Blue Planet 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 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. Caudal (Tail) Fins • most important for speed • flared to increase vertical thrust ROUNDED fin (., angelfish) very flexible, slow-speed manuevering TRUNCATE fin (., coho salmon) somewhat flexible, manuevering FORKED fin (., yellow goatfish) somewhat flexible, manuevering The Blue Planet LUNATE fin (., bluefin tuna or blue marlin) very rigid, no good for manuevering, built for pure speed HETEROCERCAL fin (“uneven tail) • most of mass & surface area in upper part to produce lift • pectorals balance to aid lift, but limits manueverability Caudal Fins rounded very flexible, manuevering truncate & forked somewhat flexible, manuevering lunate very rigid, propulsion heterocercal “uneven tail” for lift and propulsion 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 Giant Squid: • traps water in mantle and forcefully jettisons it from siphon in head • active predator of fish • arms to capture • tentacles to bring to beak • both lined with suckers The Kraken is a legend, but giant squid DO exist! ~20 feet long! Colossal Squid Captured Wellington, NZ, April 2003 330 pounds - 16 feet long Go to the web now matey!! | Marine Ecology Selected Adaptations Let’s set sail for adventure!!! 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. Selected Adaptive Strategies: Bioluminescence Fishes - important nektons Many are deepsea predators Need their own light to attract prey to attract mates photophores luciferin + luciferase The Blue Planet The Blue Planet 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 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. Caudal (Tail) Fins • most important for speed • flared to increase vertical thrust
