Today’s schedule

• Reading quiz• Reading discussion• “Empty Oceans, Empty Nets”• One-on-one discussion of papers

Reading Quiz• Name one benefit of marine biodiversity

according to Worm et al. (1)• What is shown

in (A )? (2)

• What is one problem associated with using catch data to infer population size? (1)

• What is shown in (B )? (1)

2006 : Worm et al.

= “marine ecologists”

“fisheries scientists”

Issue 1: extrapolation from coastal/estuarine systems to entire ocean

Issue #2: LME’s as “replicates”

46 degrees latitude

10 degrees latitude

Issue 3: Definition of collapse• Less than 10% of historic high

Anchoveta fishery: largest in the world

Issue #4: The hype.

A general assumption that fish stocks are everywhere in terminal decline has lead to a “community of belief that fisheries management has failed, and that we need to abandon the old approaches and use marine protected areas and ecosystem based management”

Empty Oceans, Empty Nets

• Produced by PBS• Funded by same foundation as Worm et al.

study• Is coverage balanced? What is overall

message?