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A STUDY ON THE GENERAL LIFE CYCLE OF A MARINE GAMMARID<br />

Amphipod sp. UNDER LABORATORY CONDITIONS<br />

Nor Fatihah Salwa binti mohd radzi<br />

Supervisor: Prof Dr. Mhd Ikhwanuddin<br />

Bachelor of Science (Marine Science)<br />

School of Marine and Environment Science<br />

The life cycle of a gammarid amphipod of genus gammarus from the estuary at<br />

Tumpat, Kelantan has been studied for the first time under laboratory condition.<br />

Recently, gammarid amphipods have shown good potential as live feed for finfish and<br />

crustacean aquaculture. The amphipods were cultured in 500mm clear plastic<br />

containers in filtered 7 ppt salinity water at 28° C. The life span of gammarus sp.<br />

ranged from 90 to 120 days. The females were iteroparous and attained sexual<br />

maturity within 13 ± 1 day. Copulation lasted 1-4 hours during the night. The average<br />

duration of embryonic development was 5 days. Number of broods produced in a life<br />

span ranged from 3 to 5. Mean fecundity of juveniles produced was 26.5 ± 4.72. A<br />

positive correlation between female size and number of juveniles produced was<br />

recorded. The growth rate of gammarus sp. was significantly higher during the first<br />

14 days.<br />

1892 | UMT UNDERGRADUATE RESEARCH DAY 2018

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