Class Notes (836,414)
United States (324,504)
NR 150 (3)
Ursula (3)
Lecture

Oceanography Marine bio.docx

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Department
Natural Resources
Course
NR 150
Professor
Ursula
Semester
Spring

Description
• Nekton ~ Active swimmers ~ Most are vertebrates • Arthropds • Exoskeleton • Protection coloration waterproof • Nekton • Arthropds- shrimp • Molluscs- squids • Octopus Greater blue ringer octopus • No anti-venom available • Fishes ~ Bony ~ Cartilaginous • Respiratory organ that extracts dissolved oxygen from water and later excretes carbon dioxide • Thermoregulation in fishes • Endotherms: create heat from metabolic processes • Ectotherms: use external heat sources to regulate body temperatures. • Bony fishes are the most abundant and successful fishes • Eels disguised as sea grass • Mola mola : a fish so nice they named it twice • Sea horse sheltered environments bony fish but no scales • 50 species • Sharks • Cartilaginous skeleton Sharks can lose 30,000 teeth in their lifetime No gas filled • Fishes are successful because of their unique adaptations. • Movement, shape, repulsion • Maintenance of level • Gas or fat-filled bladders in bony fish • Gas exchange •
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