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BEHAVIORAL AND PHYSIOLOGICAL STRESS RESPONSES OF Java barb (Barbonymus gonionotus) TO ENVIRONMENTAL SALINITY CHALLENGE | Abstract
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BEHAVIORAL AND PHYSIOLOGICAL STRESS RESPONSES OF Java barb (Barbonymus gonionotus) TO ENVIRONMENTAL SALINITY CHALLENGE

Abstract

Fahima Binte AMIN, Tania FARHANA, Golam Mohammod MOSTAKIM, Md. Mahiuddin ZAHANGIR, Mahbuba Monir MISHU, M. Sadiqul ISLAM

Salinity impose stress on the physiology of the ex-posed freshwater fish population can modify their structure. In this study some indicators of behavioral and physiological stress responses were examined dur-ing exposure of Java barb (Barbonymus gonionotus) to different saline concentrations. Based on the result of median lethal salinity level (LC50) (12.9ppt), one sub-lethal (12ppt) and two lethal salinity levels (14ppt and 16ppt) were selected to study the acute stress respons-es of fish for a period of 72h. A number of physiologi-cal responses, such as disturbance in body fluid, alter-ations of blood biochemical and hematological param-eters and behavioral responses were detected with in-creasing ambient salinity. Fish exposed to different sub-lethal and lethal salinities exhibited clinical signs agitated behavior, respiratory distress, abnormal nerv-ous behavior and death were recorded. From the pre-sent investigation, it was observed that higher salinity may affect the physiological and behavioral stress re-sponses in freshwater fish.

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