Stable Isotopes Approach to Infer the Feeding Habit and Trophic Position of Freshwater Fishes in Tropical Lakes

Yap, S. K.; Muneera, I.; Syakir, Muhammad; Zarul, Hazrin Hashim; Widad, F.

doi:10.5829/idosi.ijee.2016.07.02.14

Cited by 2 publications

(3 citation statements)

References 20 publications

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“…In this study, both indigenous (IS) fish H. macrolepidota and non-indigenous (NIS) fish C. ocellaris displayed similar gut structures characterized by short digestive tracts, muscular and elastic stomachs, and short intestines, aligning with the typical features of carnivorous fishes. These findings are consistent with similar results reported by Yap et al [31], conducted in the Chenderoh reservoir.…”

Section: Trophic Positioning (Tp) Of Fish According To Rglsupporting

confidence: 94%

“…TP identified for H. macrolepidota was 3.4, which means this species also occupies an upper TP in the ecosystem (i.e., secondary consumer level) and are carnivore. A similar study conducted by Yap et al [31] also suggested that H. macrolepidota and C. ocellaris from the Chenderoh Reservoir occupy higher trophic positions (TP) as secondary or tertiary consumers within the food web of the reservoir.…”

Section: Trophic Positioning (Tp) Of Fish According To δ 15 Nmentioning

confidence: 60%

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Assessing Diet & Trophic Position of Fish in Chenderoh Reservoir, Malaysia: SCA & SIA Approach

Sultana,

Aziz,

Fadzil

et al. 2024

AJFAR

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The present study assessed and compared the diet and trophic positions (TP) of two carnivorous fish H. macrolepidota and C. ocellaris from Chenderoh Reservoir, Malaysia. The focal goal of the study was to understand the effects of invasive non-indigenous species (NIS), C. ocellaris, on the native indigenous (IS) fish species, H. macrolepidota. Data were acquired from September 2014 to February 2015 within the study area. The assessment was grounded in stomach content analysis (SCA) and stable isotope analysis (SIA), which collectively clarified the feeding habits and trophic positions (TP) of these selected fish. In total, 184 fish samples (comprising 64 individuals of H. macrolepidota and 120 individuals of C. ocellaris) underwent stomach content analysis (SCA). Additionally, 24 individuals (12 of H. macrolepidota and 12 of C. ocellaris), sampled from December 2014 to February 2015, were selected for stable isotope analysis (SIA). The mean RGL values for H. macrolepidota and C ocellaris were 0.98 ± 0.18 and 1.10 ± 0.15 (Mean ± SD), respectively, aligning with known ranges for carnivorous fish. These values also clarified that both species occupy higher TP in the food web as tertiary or quaternary consumers. SCA findings also revealed that fish and crustaceans were the predominant food categories for H. macrolepidota, while C. ocellaris predominantly fed on fish. The mean stomach fullness index (MSF) and the gastrosomatic index (GSI) corroborated the differences in the foraging performance of the fishes, with C. ocellaris having a higher MSF (2.03) compared to H. macrolepidota (0.65). These implied that C. ocellaris had plentiful of food and encountered fewer diet-related challenges in the ecosystem. From SIA, δ13C values indicated that the primary carbon sources for both species are C3 plants, particularly aquatic vegetation. Further, δ15N values further ensured that both H. macrolepidota and C. ocellaris are carnivorous in nature and occupy higher TP in the ecosystem.

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Section: Trophic Positioning (Tp) Of Fish According To Rglsupporting

confidence: 94%

Section: Trophic Positioning (Tp) Of Fish According To δ 15 Nmentioning

confidence: 60%

Assessing Diet & Trophic Position of Fish in Chenderoh Reservoir, Malaysia: SCA & SIA Approach

Sultana,

Aziz,

Fadzil

et al. 2024

AJFAR

View full text Add to dashboard Cite

show abstract

“…The light, carbon dioxide and minerals in water are considered as the main factors for the growth and development of these algae. Therefore, their growth and development is exclusively limited to the area in which sunlight penetrates [11,[15][16][17]. The main factors result in reduced biodiversity in rivers can be mainly related to human activities including dam construction, industrial, agricultural, and rural pollution, as well as uncontrolled use of water for agricultural purposes.…”

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confidence: 99%

Effect of Hydraulic Flow on Phytoplankton Population Structure in Tajan River

Motevalian

Tabatabai

2022

IJEE

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The aim of present study was to investigate the relationship between hydraulic and ecological variables of the studied span and to investigate changes in living conditions of phytoplankton (Amphora ovsalis and Navicula placentula). According to the measurements and analysis of habitat fit curves, it can be concluded that the highest frequency of Amphora ovsalis and Navicula placentula occurred and specified at flow rate of 15.82 and 14.942 m 3 /s, respectively. As can be seen, the lowest frequency of Amphora ovsalis and Navicula placentula in this measurement occurred at flow rate of 15.355 and 5.289 m 3 /s, respectively. The best habitat conditions for Amphora ovsalis and Navicula placentula are in the range of 0.18 -0.31 and 0.18 -0.265 of Froude number range respectively. The highest density and abundance of Amphora ovsalis and Navicula placentula was observed in the range of 0.017 -0.055 and 0.017 -0.039 mg/l of phosphate demonstrating that the best growth and living conditions are predisposed in this range for these species had suitable habitat conditions for life in this range. The highest frequency of Amphora ovsalis and Navicula placentula is in the range of 0.019 -0.071 and 0.047-0.071 mg/l nitrite, respectively. Amphora ovsalis and Navicula placentula had the highest frequency when nitrate ranges 4.48 -5.16 and 4.48-5.37 mg/l. The best habitat conditions for Amphora ovsalis and Navicula placentula were between the mean velocity values in the range of 1 -1.2 m/s.

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Stable Isotopes Approach to Infer the Feeding Habit and Trophic Position of Freshwater Fishes in Tropical Lakes

Cited by 2 publications

References 20 publications

Assessing Diet & Trophic Position of Fish in Chenderoh Reservoir, Malaysia: SCA & SIA Approach

Assessing Diet & Trophic Position of Fish in Chenderoh Reservoir, Malaysia: SCA & SIA Approach

Effect of Hydraulic Flow on Phytoplankton Population Structure in Tajan River

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