Mesozooplankton composition and abundance in a tropical estuary during monsoon season
The study was undertaken to determine zooplankton composition and abundance along Perak River estuarine system during the Northeast (NE) monsoon. Monthly samplings were conducted from November 2009 until February 2010. Four sampling stations were selected along the salinity gradient covering station...
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| Format: | Article |
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Academic Journals
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/29418/ |
| _version_ | 1848846394490617856 |
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| author | Zakariya, Nur Zulikha Md. Yusoff, Fatimah Nishikawa, J. Arshad, Aziz Matias Peralta, Hazel Monica |
| author_facet | Zakariya, Nur Zulikha Md. Yusoff, Fatimah Nishikawa, J. Arshad, Aziz Matias Peralta, Hazel Monica |
| author_sort | Zakariya, Nur Zulikha |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The study was undertaken to determine zooplankton composition and abundance along Perak River estuarine system during the Northeast (NE) monsoon. Monthly samplings were conducted from November 2009 until February 2010. Four sampling stations were selected along the salinity gradient covering stations from the upstream down to 1 km off the coastal sea area. The zooplankton samples were collected by vertical tows using conical plankton net (100 μm mesh size). Throughout the monsoon season, a total of 11 higher taxa of zooplankton groups were recognized, of which copepods were the dominant group comprising 96% (including nauplii and copepodites) 95 and 99% of the total zooplankton abundance in the marine, estuarine and upstream station, respectively. Seventeen species of copepods from 10 genera were identified. Total zooplankton abundances recorded during the sampling period were 45.5±18.9x103, 34.9±25.9x103 and 45.9±30.5x103 individual m-3 in the upstream, estuarine and marine station, respectively. Multidimensional Scaling (MDS) analysis based on zooplankton abundance revealed three distinct groups separating the upstream from the estuarine and marine stations. Similarly, lower diversity index was recorded in the estuarine station (H’ = 2.04±0.28) compared to marine area (H’ = 2.20±0.26), suggesting that less copepod species were tolerant to the drastic changes of the estuarine environment. Low copepod densities were recorded in the beginning of the monsoon season, but progressively increased with a peak in the middle of the monsoon season. The results demonstrated that the Perak estuary was a turbid environment with drastic changes in salinity levels due to high inflow of freshwater during the monsoon season which affect the distribution of the zooplankton populations. |
| first_indexed | 2025-11-15T09:02:01Z |
| format | Article |
| id | upm-29418 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T09:02:01Z |
| publishDate | 2013 |
| publisher | Academic Journals |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-294182016-02-24T13:20:50Z http://psasir.upm.edu.my/id/eprint/29418/ Mesozooplankton composition and abundance in a tropical estuary during monsoon season Zakariya, Nur Zulikha Md. Yusoff, Fatimah Nishikawa, J. Arshad, Aziz Matias Peralta, Hazel Monica The study was undertaken to determine zooplankton composition and abundance along Perak River estuarine system during the Northeast (NE) monsoon. Monthly samplings were conducted from November 2009 until February 2010. Four sampling stations were selected along the salinity gradient covering stations from the upstream down to 1 km off the coastal sea area. The zooplankton samples were collected by vertical tows using conical plankton net (100 μm mesh size). Throughout the monsoon season, a total of 11 higher taxa of zooplankton groups were recognized, of which copepods were the dominant group comprising 96% (including nauplii and copepodites) 95 and 99% of the total zooplankton abundance in the marine, estuarine and upstream station, respectively. Seventeen species of copepods from 10 genera were identified. Total zooplankton abundances recorded during the sampling period were 45.5±18.9x103, 34.9±25.9x103 and 45.9±30.5x103 individual m-3 in the upstream, estuarine and marine station, respectively. Multidimensional Scaling (MDS) analysis based on zooplankton abundance revealed three distinct groups separating the upstream from the estuarine and marine stations. Similarly, lower diversity index was recorded in the estuarine station (H’ = 2.04±0.28) compared to marine area (H’ = 2.20±0.26), suggesting that less copepod species were tolerant to the drastic changes of the estuarine environment. Low copepod densities were recorded in the beginning of the monsoon season, but progressively increased with a peak in the middle of the monsoon season. The results demonstrated that the Perak estuary was a turbid environment with drastic changes in salinity levels due to high inflow of freshwater during the monsoon season which affect the distribution of the zooplankton populations. Academic Journals 2013 Article PeerReviewed Zakariya, Nur Zulikha and Md. Yusoff, Fatimah and Nishikawa, J. and Arshad, Aziz and Matias Peralta, Hazel Monica (2013) Mesozooplankton composition and abundance in a tropical estuary during monsoon season. Journal of Fisheries and Aquatic Science, 8 (3). pp. 430-440. ISSN 1816-4927; ESSN: 1996-0751 http://www.scialert.net/abstract/?doi=jfas.2013.430.440 10.3923/jfas.2013.430.440 |
| spellingShingle | Zakariya, Nur Zulikha Md. Yusoff, Fatimah Nishikawa, J. Arshad, Aziz Matias Peralta, Hazel Monica Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title | Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title_full | Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title_fullStr | Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title_full_unstemmed | Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title_short | Mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| title_sort | mesozooplankton composition and abundance in a tropical estuary during monsoon season |
| url | http://psasir.upm.edu.my/id/eprint/29418/ http://psasir.upm.edu.my/id/eprint/29418/ http://psasir.upm.edu.my/id/eprint/29418/ |