Table 1 Catch of Bigeye and Yellowfin Tuna per 1000 Hooks.

From: Impact of two of the world's largest protected areas on longline fishery catch rates

 

(1)

(2)

(3)

(4)

(5)

Constant

4.927***

5.732***

5.329***

5.060***

 −0.355

 

(0.039)

(0.084)

(0.113)

(0.341)

(4.496)

PRI expansion

1.083***

1.049***

0.078

 −0.082

 −0.605***

 

(0.069)

(0.068)

(0.213)

(0.215)

(0.225)

PMNM expansion

0.887***

0.783***

0.494***

0.494***

0.103

 

(0.095)

(0.094)

(0.186)

(0.188)

(0.254)

Month dummies

No

Yes

Yes

Yes

Yes

Year dummies

No

No

Yes

Yes

Yes

Vessel dummies

No

No

No

Yes

Yes

Additional controls

No

No

No

No

Yes

Observations

29,750

29,750

29,750

29,750

29,750

R2

0.022

0.047

0.051

0.097

0.102

  1. Notes: Each successive column adds additional controls to a simple regression test of whether catch-per-unit-effort increases following the first expansion and again following the second expansion (Column (1)). The sample runs from January 1, 2010 to December 31, 2017. Heteroskedasticity-robust standard errors presented in parentheses. The additional controls are whether the set included an experimental component, a dummy variable for whether Western and Central Pacific Fisheries Commission waters were closed to fishing, a dummy variable for whether Inter-American Tropical Tuna Commission waters were closed to vessels longer than 24 m, Monthly El Niño indicator, Monthly El Niño indicator lagged by 1 year, Monthly El Niño indicator lagged by 2 years, and Monthly El Niño indicator lagged by 3 years. *p < 0.1; **p < 0.05; ***p < 0.01 for two-sided t test of statistical significance using heteroskedasticity-robust standard errors.
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