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Fluctuating asymmetry analysis of trimac Amphilophus trimaculatus as indicator of thecurrent ecological health condition of Lake Sebu, South Cotabato, Philippines
Lecera, J.M.I.; Pundug, N.A.C.; Banisil, M.A.; Flamiano, R.S.; Torres, M.A.J.; Belonio, C.L.; Requieron, E.A. (2015). Fluctuating asymmetry analysis of trimac Amphilophus trimaculatus as indicator of thecurrent ecological health condition of Lake Sebu, South Cotabato, Philippines. AACL Bioflux 8(4): 507-516
In: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society. Bioflux: Constanta. ISSN 1844-8143; e-ISSN 1844-9166
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| Trefwoord |
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| Author keywords |
Geometric morphometrics, fish morphology, fish stock health, SAGE |
| Auteurs | | Top |
- Lecera, J.M.I.
- Pundug, N.A.C.
- Banisil, M.A.
- Flamiano, R.S.
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- Torres, M.A.J.
- Belonio, C.L.
- Requieron, E.A.
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| Abstract |
Lake Sebu is one of the important watersheds in the country supplying water to the lowland areas and contributed to the economic aspects of the place wherefore, the environmental status and condition of which is highly significant. Catastrophes such as fish kills recently happened in the lake, thus, the researchers aimed to monitor the current environmental status of the lake by evaluating the living organisms inhabiting the lake. Trimac Amphilophus trimaculatus is one of the major organisms found in the lake and it may serves as bio indicator of the environment. An evaluation among its trait asymmetry was used and it is believed to be an indicator of developmental noise and predict the lake status. In this study, 180 individuals, 90 species per sexual category were collected by net fishing techniques. Variations in the patterns of fluctuating asymmetry (FA) in a total of sixteen bilateral traits of the A. trimaculatus were determined using the method of landmark-based geometric morphometric. The paired landmark coordinates were subjected to the procustes ANOVA using the SAGE software version 1.0. The overall result of the study showed only minimal stress effects through the body shape analysis of A. trimaculatus is experienced, signifying that the lake is currently in good condition after the latest fish kill phenomenon. However, individual asymmetry in male proved, otherwise individual symmetry, and in female showed no significant differences because of the mechanisms that buffer developmental noise that made it capable of maintaining homeostasis. |
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