Zoo-holoplankton assemblages in the surrounding waters of Kamal Western Part of Seram Island Maluku Indonesia

Abstract

Zoo-holoplankton dynamic between the sites are useful to knowledge with the regard to the characteristic of the areas and in relative to the community structure of zoo-holoplankton.The research conducted in the surrounding waters of Kamal village, the western part of Seram Island, Maluku Province. Zoo-holoplankton organisms collected from six-fixed Research stations consisted of different characteristics, namely stations 1 and 2 are Fish Aggregation Device placement areas, station 3 is the area for setting the lift nets, stations 4 and 6 are in front of the river mouth and station 5 is in the coral reef area. Sampling done every two weeks by using zooplankton net (diameter of 45 cm) sled with a 200 µm meshed. The result showed that the composition of zoo-holoplankton consisted of 37 genera from 8 phylum, 9 classes, and 28 families. There were about 9 genera (Calanus sp, Calocalanus sp, Acartia sp, Centropages sp, Oithona sp, Onceae sp, Corycaeus sp and Copilia sp), which found in all stations and periods. While some genera are only present at certain stations or periods (Eucalanus sp, Labidocera sp, Sapphirina sp, and Evadne sp). The abundance of zoo-holoplankton peaked at station 5 (16,332 ind/m−3) in the third period, while the lowest was at station 1 (809 ind/m−3) in the second period. Similarities indices was high between station 1 and 2 during the whole period (91%, 82% and 78%) and was low between station 1 and 6 (In the first period) and station 3 and 5. We noticed that differences characteristic of sampling areas leading to the abundance and the genera numbers of zoo-holoplankton. .