The dynamics abundance of meroplankton in Nusalaut coastal waters, Central of Maluku Regency
Hanung Agus Mulyadi & Arif Seno Adji
Research Center for Deep Sea
Indonesian Institute of Sciences
Jl. Y. Syaranamual, Guru-guru Poka, Ambon Maluku 97233
email: hanu001[at]lipi.go.id
Abstract
The aim of this study was to investigate the abundance and diversity of meroplankton (larvae of benthos and nekton, including eggs) in the Nusalaut coastal waters. The field survey data were conducted in May 2009 and April 2014. The abundance of meroplankton was collected from NORPAC net (0.33 mm, mesh size) by vertical hauling from 10 meter of deep to the surface. The samples were taken in 8 stations. All samples were preserved with 4% formaldehyde and analyzed using a microscope. In May 2009, total abundance of meroplankton varied between 84 ind.m-3 and 780 ind.m-3, but mainly fluctuated around 300-500 ind.m-3. Larvae of 13 taxa were identified. Fish eggs represented the most predominant taxa (average abundance 96 ind.m-3), followed by echinodermata larvae (81 ind.m-3). Meanwhile, total abundance in April 2014 was lower compared with May 2009. During this period, the total abundance varied between 8 ind.m-3 and 48 ind.m-3. Larvae of 7 taxa were found. Echinodermata larvae represented the most predominant taxa (average abundance 6 ind.m-3), followed by gastropoda larvae (5 ind.m-3). It is predicted that spawning season occurred during May, indicated from the high value of total abundance of meroplankton.
Keywords: meroplankton, fish eggs, echinodermata larvae, Nusalaut waters
Topic: Marine Resources, Conversation and ICZM