Dataset 778
Trinidad's Northern Range Freshwater Fish Survey (2011-2015)
Realm: Freshwater
Climate: Tropical
Biome: Small river ecosystems Central latitude: 10.683120
Central longitude: -61.272670
Duration: 5 years, from 2011 to 2015
Climate: Tropical
Biome: Small river ecosystems Central latitude: 10.683120
Central longitude: -61.272670
Duration: 5 years, from 2011 to 2015
2001 records
23 distinct species
Across the time series Poecilia reticulata is the most frequently occurring speciesMethods
"Sites in Trinidads Northern Range (SI Appendix) were sampled four times per year (twice in the wet season and twice in the dry season) for 5 y (20102015). On each sampling occasion the diversity of fish, benthic invertebrates, and diatoms at a site was quantified. Sampling methodology was consistent throughout. Eight of our sites were exposed to human pressure in the form of recreational use (31). These recreationally disturbed” (d) sites were matched with recreationally undisturbed” (u) sites in the same river system." "The same 50-m stretches of stream were revisited each session." "Fish were exhaustively sampled (35, 36) using a seine net followed by electrofishing (37). The species of all individuals were identified and counted. Fish were returned unharmed to the capture site at the end of a session."[Extracted from Magurran et al., 2018] Additional: an estimate of the number and weight of the individuals seen but not caught is included in the records. The size (length) of the individuals seen was reported in the field and transformed to weight in g using standard length-weight relationship parameters. Abundance units are individual counts, and biomass units are weights in g. Grain size is the length of the river section sampled. Data collected the first year of sampling (2010) are excluded because sampling effort was unequivalent with the rest of the time series. Two sampling repeatabilities carried out in the Acono and Maracas sites in 2011 are excluded.Citation(s)
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