Resiliency of small-holder fishfarmers to climate change and market prices in selected communities in the Philippines
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MetadataShow full item record
SeriesFAO fisheries and aquaculture proceedings; 31
Showing items related by title, author, creator and subject.
The Agusan Marsh and the Agusan River Basin: The need for science-based development and management JH Primavera - In MLC Aralar, AS Borja, AL Palma, MM Mendoza, PC Ocampo, EV Manalili & LC Darvin (Eds.), LakeCon2011: Building on the pillars of Integrated Lake Basin Management (Second National Congress on Philippine Lakes), 2013 - PCAARRD-DOST
Series: Summary of Proceedings No. 1/2013
ArticleVGV Paller, MNC Corpuz & PP Ocampo -
Philippine Journal of Science, 2013 - Science and Technology Information InstituteThree 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.
Paralytic shellfish poisoning toxin accumulation in shellfishes collected from various habitats in Murcielagos Bay, Philippines during harmful algal blooms occurrence RJA Narceda, UM Montojo, MRR Eguia & GL Sia Su -
Advances in Environmental Biology, 2014 - American-Eurasian Network for Scientific Information (AENSI)This study aims to determine whether the habitat of bivalves plays an influence in the occurrence of tropical shellfish toxicity during toxic red tide bloom occurrences in Murcielagos Bay, Misamis Occidental, Philippines. Various shellfish species were collected during the occurrence of red tide blooms. The type of habitat and the shellfish toxicities were investigated. Likewise, the phytoplankton profile in the seawater column was assessed. Results of our study revealed that the occurrence of shellfish toxicities was habitat specific in spite of the fact that the causative organism Pyrodinium bahamense var. compressum was present in low concentrations in the sampling sites. Shellfish collected from sea grass, coralline area, and seafloor habitats were notably susceptible against the paralytic shellfish poisoning toxin contamination compared to those samples obtained from soil substrate. Continuous monitoring of areas that are affected with shellfish toxicity must be conducted so as to safeguard the general public’s welfare dependent on these resources.