Food Chains Whales Dolphins and Porpoises This map

Food Chains

Whales, Dolphins and Porpoises

This map shows where some of them are usually seen.

How do whales and dolphins catch their food? © Tim Stenton Toothed whales (and dolphins) © Charlie Phillips Baleen whales

How do whales and dolphins catch their food? • • • Echolocation Skimming Lunge feeding Bubble-netting Cooperative hunting

Echolocation ‘Melon’

Class activity: Echolocation game

Blue Whale Diet: Krill (Length = 5 cm!) Eats 40 million every day! Maximum Weight: 200, 000 kg Maximum Length: • Male: 25 -28 m • Female: 30 m • Calf: 4 m

Class activity: How big is a blue whale?

Food chains and webs

Food chain Blue whale Krill (shrimp) Zooplankton (microscopic animals) Phytoplankton (microscopic plants)

Food web Blue whale Krill (shrimp) Zooplankton (microscopic animals) Phytoplankton (microscopic plants)

Class activity: Ocean food web

Ocean food web

The importance of whale poo! Whale poo video

Threats to whales and dolphins

Hunting

Litter and Pollution

Bycatch

Dangerous fishing nets Pelagic trawl net Pelagic pair trawl net Drift and gill net Purse seine net

Class activity: Design a safe fishing net For inspiration: a net designed to allow turtles to escape - video

Class activity: Find me a…

Class activity: Ocean food webs quiz