Chapter 15 Applied Problems: harvesting populations.

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Presentation transcript:

Chapter 15 Applied Problems: harvesting populations

Chapter Opener

Figure 15-1

Figure 15-2

Figure 15-3

Peruvian anchovy: In 1970, 18 % of all global fish harvest

16 million sea bird to 3 million Figure 15-4 16 million sea bird to 3 million

Figure 15-9

Figure 15-10

Tragedy of the common

? Why did the king crab fishery collapse in 1981? Figure 15-13 Case study : King Crab Fishery of Bristol Bay Alaska ? Why did the king crab fishery collapse in 1981?

Figure 15-14 Female mature at age of 8. Male mature at age 9 to 10

Very successful case in Australia Figure 15-15 Very successful case in Australia

Figure 15-16

Figure 15-17 18 % fo pot reduction Size of lobster Egg carrying female

Catches of baleen whales in Sothern hemisphere 1904- 2005 Blue: 21-30 Figure 15-18 Catches of baleen whales in Sothern hemisphere 1904- 2005 Blue: 21-30 Fin 17-26 Sei 14-16 Humpback 11-15 Mink 7-10

Figure 15-24 Hunting