Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal HAYATI Journal of Biosciences Marine Research in Indonesia
Sem Likumahua, Sem
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
RECENT BLOOMING OF PYRODINIUM BAHAMENSE VAR. COMPRESSUM IN AMBON BAY, EASTERN INDONESIA Likumahua, Sem
Marine Research in Indonesia Vol 38, No 1 (2013)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1545.642 KB) | DOI: 10.14203/mri.v38i1.54

Abstract

In Indonesia, Pyrodinium bahamense var. compressum was first recorded in Kao Bay in 1994. In 1996 the illness of more than 30 people and the death of 3 children after consuming shellfish from Ambon Bay was reported. Until the shellfish poisoning cases was reported, occurrences and blooms of P. bahamense, neither its toxic events had never been known in Ambon Bay. It has generated monitoring on the species occurrence which has been carried out since 2008. The bloom of P. bahamense was detected in July 2012. During the bloom event, concentrationsof phosphate, nitrate and dissolved oxygen were measured. Vertical profiles of temperature, salinity, turbidity and chlorophyll a were also measured during the red tide. Cells of P. bahamense, the PSP responsible species, were recorded abundant up to 2,496 cells/ml when red-brown water discoloration was observed in Ambon Bay. After the toxic red tide, human illness of 7 people due to shellfish consumption was also reported. In addition, the bloom event has damaged aquaculture products, due to mass mortality of cultured fish in inner Ambon Bay.
RECENT BLOOMING OF PYRODINIUM BAHAMENSE VAR. COMPRESSUM IN AMBON BAY, EASTERN INDONESIA Likumahua, Sem
Marine Research in Indonesia Vol 38 No 1 (2013)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1545.642 KB) | DOI: 10.14203/mri.v38i1.54

Abstract

In Indonesia, Pyrodinium bahamense var. compressum was first recorded in Kao Bay in 1994. In 1996 the illness of more than 30 people and the death of 3 children after consuming shellfish from Ambon Bay was reported. Until the shellfish poisoning cases was reported, occurrences and blooms of P. bahamense, neither its toxic events had never been known in Ambon Bay. It has generated monitoring on the species occurrence which has been carried out since 2008. The bloom of P. bahamense was detected in July 2012. During the bloom event, concentrationsof phosphate, nitrate and dissolved oxygen were measured. Vertical profiles of temperature, salinity, turbidity and chlorophyll a were also measured during the red tide. Cells of P. bahamense, the PSP responsible species, were recorded abundant up to 2,496 cells/ml when red-brown water discoloration was observed in Ambon Bay. After the toxic red tide, human illness of 7 people due to shellfish consumption was also reported. In addition, the bloom event has damaged aquaculture products, due to mass mortality of cultured fish in inner Ambon Bay.
Spatial and Temporal of Meroplankton in a Semi-enclosed Bay: Insights from Ambon Bay Ruli, Fismatman; Likumahua, Sem; Salamena, Gerry Giliant; Romdon, Ahmad
HAYATI Journal of Biosciences Vol. 33 No. 1 (2026): January 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.1.219-231

Abstract

Meroplankton is a temporary planktonic phase of marine organisms. Despite their critical role in the ecosystem, the study of their distribution and dynamics in Ambon Bay is still limited. Therefore, this study aims to investigate the spatial distribution and dynamics of meroplankton in Ambon Bay. Study conducted during the southeast monsoon (August and September) to transition II (October and November) 2022. Meroplankton was captured using a plankton net towed vertically from approximately 20 m, near the bottom, to the surface, and immediately preserved in formaldehyde (final concentration of 4%). A stemple pipette was used for subsamples, and they were observed under a stereo microscope. Thirteen groups of meroplankton were recorded, with three groups (Bryozoa, Phoronida, and Brachiopoda larvae) being newly reported in this area. Bivalvia and Polychaeta larvae had the highest abundance. Meroplankton abundance was consistently higher in the inner Ambon Bay (240.62-3029.02 ind.m-3) than in the outer Ambon Bay (85.63-955.41 ind.m-3), highlighting the ecological significance of this area as a potential spawning and larval nursery ground. Most meroplankton taxa were recorded across all sampling seasons, except for Phoronida and Stomatopoda, which were only observed during the southeast monsoon. In comparison to previous studies, the abundance of Echinodermata peaked during the transition I to the southeast monsoon, whereas Polychaeta exhibited peak abundance during the northwest monsoon. This study offers significant insights into the diversity, spatial distribution, and dynamics of meroplankton in Ambon Bay.
Co-Authors Romdon, Ahmad Ruli, Fismatman Salamena, Gerry Giliant