Table 2. Changes in fish biomass between 1999 and 2009 in (a) Cabo Pulmo National Park, (b) other no-take or core zones, and (c) open-access areas.
TopPredators | Carnivores | Zooplanktivores | Herbivores | Total | ||
Cabo Pulmo | F | + | ||||
t | + | + | + | + | + | |
U | + | + | + | + | ||
ρ | 0.25 | 0.16 | 0.12 | 0.16 | 0.17 | |
Core zones | F | + | ||||
t | ||||||
U | ||||||
ρ | 0.005 | 0.005 | 0.03 | −0.01 | 0.003 | |
Open access | F | |||||
t | ||||||
U | ||||||
ρ | −0.03 | 0.009 | −0.01 | −0.03 | −0.01 |
Rows indicate the test used or parameter measured (F for Fisher's equality of variances test; t for Student's t-test for unequal sample sizes and unequal variances; U for Mann-Whitney's rank-sum test, and ρ for the rate of change). Plus signs (+) indicate a significant increase in biomass variance (F), in mean biomass (t), or in ranked biomass (U); blank spaces indicate non-significant changes.