Conference Proceeding

Assemblage and Contribution of Copepods in Tropical Lagoon of Setiu, East Coast of Peninsular Malaysia

Dr.Zaleha Kassim ,
Planktonic organisms are the major contributor to the stability of an aquatic ecosystem. They include the small phyto-and zooplankton groups as well as the nekton groups. Five months samplings were carried out during the warm months between April to September 2015 in the coastal lagoon of Setiu, at the east coast of Peninsular Malaysia to understand the copepods assemblage and their contribution to the ecosystem. Three stations were selected, Station 1, fringing mangroves (05º41.618”N, 102º41.875”E - 05º41.646”N, 102º41.846”E), Station 2, open lagoon with seagrasses (05º41.158”N, 102º42.544”E - 05º41.203”N, 102º42.518”E) and Station 3, the river opening to the sea (05º40.482”N, 102º43.197”E - 05º40.520”N, 102º43.103”E). Zooplankton samples were collected using 60μ and 100μ plankton net. Small fishes were caught using seine nets (0.5cm2) in a 24hours sampling for gut content analysis. The lagoon water was generally in brackish water condition (16.28±7.46 - 27.05±2.10 ppt) with low pH (5.97±1.41 - 7.51±0.49). Copepods of at least 60μ size dominated all stations if compared to the size of 100μ and above. Copepod composition was dominated by Cyclopoida at Station 1 and Station 2, while Calanoida dominated Station 3. The difference in copepod dominancy among stations indicates the seawater influence which determines the copepod assemblages in the lagoon. Setiu lagoon could be an important nursery ground for many important marine species as indicated by the higher abundance of small-sized than the big-sized copepods. From the total of 34 small fishes caught in mangroves and seagrasses área, Harpacticoida dominated 14.3-92.5% of the food ítem while Calanoida contributed 30.0-75.0%. Further study on the prey-predator interaction would give a better picture of the complexity of copepods’ assemblages in the lagoon.

Published: 28 July 2017

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Copyright: © 2017 Zaleha Kassim. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.