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. 2012 Aug 31;7(8):e44297. doi: 10.1371/journal.pone.0044297

Table 3. Numbers of exploited and non-exploited fish species for each trait.

Category Trait Non-exploited Exploited Test Proportion of species
Size Maximum size 17.0 (21.3) 62.3 (46.0) No overlap* E > NE
Depth Very shallow 234 37 40.38* E < NE
Shallow 259 44 40.58* E < NE
Mid 202 118 3.10 E  =  NE
Deep 207 152 12.20* E > NE
Very deep 250 209 26.02* E > NE
Diet Diurnal planktivores 66 24 1.43 E  =  NE
Excavators 1 3 3.24 E  =  NE
Macroalgal browsers 1 8 12.78* E > NE
Macro carnivores 50 124 101.57* E > NE
Mobile benthic invertivores 749 139 86.55* E < NE
Nocturnal planktivores 29 0 13.98* E < NE
General omnivores 74 87 29.60* E > NE
Strict piscivores 15 60 70.92* E > NE
Sand invertivores 65 73 23.12* E > NE
Scraper herbivores 22 18 2.67 E  =  NE
Coral/colonial sessile invertivores 44 16 0.97 E  =  NE
Spongivores 3 5 3.20 E  =  NE
Territorial herbivores 24 1 9.29* E < NE
Turf grazers 9 2 1.05 E  =  NE

Comparison of the numbers of exploited (E) and non-exploited (NE) species for each selected trait. The χ2 test-of-independence was used for all tests but that of size, which used the overlap of the 95% confidence intervals. The size of the exploited and non-exploited species groups was 560 and 1152 respectively. For size, values indicate mean (± s.d.).

*

significant test (α  = 0.05). See Halpern and Floeter [25] supplementary online material for further details on traits.