Table 1 Characteristics of the 10 surveyed sites.
From: Population variation in the trophic niche of the Trinidadian guppy from different predation regimes
Site | Predation | Date | Fish community | Guppy density (#/m2) | % open canopy | Discharge (L/s) | CPOM (gDM/m2) | Reach width (m) | Epilithon (from pool) (gAFDM/m2) | FBOM (gDM/m2) | Inverts biomass (mgDM/m2) |
|---|---|---|---|---|---|---|---|---|---|---|---|
Arima | HP | Jul-08 | R, G, Chrenicicla, Rhamdia | 1.01 | 38.4 | 32.0 | 20.5 (8.9) | 32.6 | 3.59 (2.5) | 9.92 (8.9) | 971 (861) |
Arima | LP | Jul-08 | R, G | 3.06 | 14.8 | 15.8 | 195 (215) | 5.40 | 7.58 (0.5) | 17.2 (15.7) | 208 (266) |
Aripo | HP | Jul-07 | R, G, Chrenicicla, Hoplias, Rhamdia, Aquidens, Hypostomus/Ancistrus, Characidae, Sinbranchus | 0.27 | 28.4 | 52.7 | 31.0 (54.2) | 17.4 | 3.51 (1.1) | 15.3 (15.0) | 5517 (1867) |
Aripo | LP | Jul-07 | R, G | 19.4 | 10.8 | 41.1 | 39.7 (22.2) | 1.63 | 9.81 (6.0) | 57.9 (83.3) | 700 (629) |
Guanapo | HP | Jul-07 | R, G, Hoplias, Rhamdia, Aquidens, Hypostomus/Ancistrus, Characidae | 2.20 | 18.3 | na | 18.6 (21.2) | na | 3.36 (1.5) | 9.95 (13.0) | 1400 (755) |
Guanapo | LP | Jul-07 | R, G | 5.02 | 11.0 | 32.6 | 40.7 (38.2) | 2.37 | na | 21.7 (22.3) | 2431 (1799) |
Marianne | HP | Jul-07 | R, G, Agonostomus, Eleotris, Gobiomorus Sicydium, Awaous, Gobiesox, | 5.37 | 23.4 | 1323 | 112 (136) | 6.61 | 5.39 (2.1) | 16.6 (16.4) | 2164.5 (1307) |
Marianne | LP | Jul-07 | R, G | na | 12.5 | 1478 | 242 (240) | 3.55 | 8.21 (5.3) | 19.1 (22.5) | 816 (476) |
Quare | HP | Jul-08 | R, G, Chrenicicla, Hoplias, Rhamdia, Aquidens, Hypostomus/Ancistrus, Characidae | na | 48.2 | 57.5 | 17.0 (10.0) | na | 9.89 (6.5) | 8.67 (9.8) | 415 (233) |
Quare | LP | Jul-08 | R, G | na | 11.4 | 11.9 | 43.1 (29.3) | 2.37 | 11.2 (4.7) | 10.0 (9.8) | 38.3 (47.4) |
