Diversity and distribution of freshwater fish assemblages in Tayabas River, Quezon (Philippines)
MetadataShow full item record
Three stream sections (upstream, midstream, and downstream) of Tayabas River, Philippines were surveyed during the wet and dry seasons of 2010 to evaluate the poorly known status of freshwater fish assemblages. The study collected a total of 1,070 individuals comprising 15 species, 13 genera, and 8 families. The three most abundant groups were poeciliids (61.85%), gobiids (26.16%), and cichlid (5.51%). Shannon-Weiner’s diversity indices ranged from 1.270 to 2.171. Relatively high Shannon evenness indices (0.653–0.846) and low Simpson’s dominance values (0.142–0.322) were calculated implying a fairly equitable distribution of niche space for dominant and non-dominant fishes. Significant change on fish assemblage in longitudinal gradient was observed (p<0.05), being the most diverse fish assemblage registered in the upstream. Species richness is mostly composed of native fish species (10 species) and mainly represented by stream gobiids (six species). The downstream, however, had the highest cumulative abundance, in which the larger proportion was from introduced species. Also, wet season had considerably more fish species and individuals relative to dry season (p<0.05). This significant spatio-temporal differences in fish assemblage data were evaluated by multivariate analyses (p<0.05). Canonical correspondence analysis identified the depth (seasonal water level fluctuations), vegetation growth, and dissolved oxygen concentrations (in order of importance) as the most influential environmental parameters affecting fish assemblage structure. Also, climatic stress (prolonged drought) and anthropogenically-induced habitat alteration could negatively affect the integrity of freshwater fishes within the river. The study suggests extensive management programs of the river for the protection of native fish species.
Suggested CitationPaller, V. G. V., Corpuz, M. N. C., & Ocampo, P. P. (2013). Diversity and distribution of freshwater fish assemblages in Tayabas River, Quezon (Philippines).
- AQD Journal Articles 
Showing items related by title, author, creator and subject.
SMALL – SCALE FISHERIES IN THE KO MAN GROUP AREA, EASTERN COAST OF THE GULF OF THE GULF OF THAILAND: Fishing Gear and Marine Catch at Six Fishing Villages with Special Reference to the Ban Krachae-Kungkraben Fishing Villages Yanagawa, Hiroyuki; Munprasit, Aussanee (Training Department, Southeast Asian Fisheries Development Center, 1990-04)Analysis of the Thai marine capture fishery showed that the catch of small-scale fisheries accounted for 16.5% of the total catch (SEAFDEC, 1988), but fishermen belonging to small- scale fisheries accounted for 79.8% of ...
Chemicals and drug residues in fish and fish products in Southeast Asia - Harmful algal blooms (HABs) in the ASEAN region Yankai, Liu (Secretariat, Southeast Asian Fisheries Development Center, 2015)
Joint ASEAN-SEAFDEC declaration on regional cooperation for combating illegal, unreported and unregulated (IUU) fishing and enhancing the competitiveness of ASEAN fish and fishery products Southeast Asian Fisheries Development Center (Secretariat, Southeast Asian Fisheries Development Center, 2016)