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040 _cFoundation University
050 _a(CAS-Bio) LG 221 D35 A78
_b A5 B56 .2024 G633
100 _aGomez, Ted Hubert Kent C.
_eauthor.
_911183
245 _a"Preliminary study on the occurrence of freshwater fishes in relation to physicochemical parameters at Bayawan City Nature Reserve" /
_cTed Hubert Kent C. Gomez
260 _aDumaguete City :
_bFoundation University ;
_c2024
300 _avii, 53 pages :
_bcolor illustrations ;
_c28 cm
504 _aIncludes bibliographical references and appendices.
520 _aThis preliminary study explores the relationship between physicochemical parameters and freshwater fish occurrence within the Bayawan City Nature Reserve, Negros Oriental, and Philippines. Sampling took place from July to August 2024 across three sites at 61 meters, 113 meters and 180 meters elevation, respectively. Water quality indicators—including ammonia, phosphate, pH, electrical conductivity (EC), total dissolved solids (TDS), salinity, temperature, and water velocity—were measured to assess their impact on fish presence. There were fish species in Sites 2 and 3; however no fish was found in Site 1. Two species were identified: Barbodes sp. and Sicyopus zosterophorus. Results showed that temperature and was the most influential parameter in determining fish occurrence (Discriminant Function Analysis at p < 0.00001) gives a p-level of 0.000122. Site 2 had a temperature of 27.05°C, Site 3 exhibited a temperature of 27.64°C as opposed to Site 1 (in which no fish was found) with 26.43°C. Water velocity did not play a part in the species diversities as the time it took for water to travel in 2 meters were at 12.92, 21.02, and 8.54 minutes for Sites 1, 2, and 3 respectively.. Additionally, Site 2 exhibited higher value of EC (423.33 μS/cm), TDS (211.87 mg/L), and ammonia (0.33 mg/L, which may indicate higher nutrient availability). These parameters may support biodiversity, though these factors did not reach statistical significance. The absence of fish at Site 1 where cooler temperatures prevailed further emphasized the critical role of specific environmental conditions in shaping fish distributions. This study highlights the importance of stable, warm temperatures in promoting fish diversity in freshwater ecosystems. Keywords: Fish Ecology, Physicochemical Parameters, Species Distribution, Habitat Suitability, Temperature and Water Velocity, Water Quality Indicators, Nutrient Availability
650 _2LC
_aFreshwater fishes.
_911184
658 _aNursing, Bachelor of Science in.
_b"Preliminary study on the occurrence of freshwater fishes in relation to physicochemical parameters at Bayawan City Nature Reserve"
_cNur200
690 _2FU
_aFish Ecology
_911186
690 _2FU
_aPhysicochemical Parameters
_911187
690 _2FU
_aSpecies Distribution
_911188
690 _2FU
_aHabitat Suitability
_911189
690 _2FU
_aTemperature and Water Velocity
_911190
690 _2FU
_aWater Quality Indicators
_911191
690 _2FU
_aNutrient Availability
_911192
856 _3"Preliminary study on the occurrence of freshwater fishes in relation to physicochemical parameters at Bayawan City Nature Reserve"
_uhttps://drive.google.com/file/d/1gp3kcy4x4YYSGu44xcSRfbqSVFjbgUyV/view?usp=sharing
942 _2lcc
_cTH
_hLG 221 D35 A78
_iA5 B56 .2024 G633
_k(CAS-Bio)
_n0
999 _c4581
_d4581