Fluctuating asymmetry and acetylcholinesterase activity in tank goby (Glossogobius giuris) (Hamilton 1822) as indicators of environmental stress in the East Bay of Laguna de Bay, Philippines
Issue Date
7-2019
Abstract
Fluctuating asymmetry (FA), the subtle random deviation between left and right sides of bilaterally symmetrical organism, and inhibition of acetycholinesterase (AChE) activity are widely reported as potential early-warning tools in monitoring the health of aquatic ecosystems. This study investigated asymmetry in body shape and AChE in tank goby, Glossogobius giuris, a native and commercially important fish of dwindling stocks in Laguna de Bay, Philippines. Wild fish populations from predominantly agricultural sites in Bay and Santa Cruz, in the East Bay of Laguna de Bay, were compared to a reference population, reared in concrete tanks. Landmark-based geometric morphometrics via Symmetry and Asymmetry in Geometric Data and Procrutes Analysis of Variance revealed significant levels of both directional and fluctuating asymmetries among populations. High F values of FA imply that deviations from perfect symmetry are attributed to environmental stress. Principal component analysis for FA showed notable deformations and higher overall variation in wild populations. Moreover, rapid colorimetric method determined significantly lower brain and muscle AChE activities in wild populations. AChE Inhibition rates are indicative of fish exposure to anticholinesterase pesticides in the agricultural sites. Findings may indicate the presence of environmental stress associated with anthropogenic pressures in East Bay which manifested in the morphology and physiology of tank goby.
Source or Periodical Title
Sylvatrop: the technical journal of Philippine Ecosystems and Natural Resources
ISSN
0115-0022
Volume
29
Issue
2
Page
1-21
Document Type
Article
Frequency
biannually
Physical Description
illustrations; graphs; maps; tables; references
Language
English
Subject
Gobiidae; Fluctuating asymmetry; Geometric morphometrics; Pesticides
Recommended Citation
Fajardo, Lorenz J. and Camacho, Maria Vivian C., "Fluctuating asymmetry and acetylcholinesterase activity in tank goby (Glossogobius giuris) (Hamilton 1822) as indicators of environmental stress in the East Bay of Laguna de Bay, Philippines" (2019). Journal Article. 4843.
https://www.ukdr.uplb.edu.ph/journal-articles/4843
En – AGROVOC descriptors
GLOSSOGOBIUS GIURIS; ACETYLCHOLINESTERASE; AQUATIC ECOSYSTEMS; ENVIRONMETAL MONITORING; EARLY WARNING SYSTEMS; MONITORING; INDICATORS; PESTICIDES; PHILIPPINES