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This dissertation, "Macrobenthic Faunal Assemblages of a Traditional Tidal Shrimp Pond at Mai Po Marshes Nature Reserve, Hong Kong" by Tak-hang, Lui, 呂德恒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We This dissertation, "Macrobenthic Faunal Assemblages of a Traditional Tidal Shrimp Pond at Mai Po Marshes Nature Reserve, Hong Kong" by Tak-hang, Lui, 呂德恒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled MACROBENTHIC FAUNAL ASSEMBLAGES OF A TRADITIONAL TIDAL SHRIMP POND AT MAI PO MARSHES NATURE RESERVE, HONG KONG submitted by LUI Tak Hang for the degree of Master of Philosophy at The University of Hong Kong in August 1999 The Mai Po Marshes Nature Reserve makes up part of the largest wetland in Hong Kong. The marshes have acquired international recognition as an important stopping-over site for migratory waterbirds. The major area of the marshes consists of traditional tidal shrimp ponds. The composition and spatial distribution patterns of the macrobenthic faunal assemblages of a traditional tidal shrimp pond, and the role of the macrobenthos as food for cultured shrimp, were studied. Species richness, abundance and biomass of macrobenthos across 5 different sub-habitats within a traditional tidal shrimp pond at Mai Po Marshes were examined bimonthly between January, 1997, and January, 1998. Grabs were used to collect the sediment randomly across the sub-habitats. The physical environmental parameters of the sampling sites were measured. To assess the contribution of macrobenthic fauna as food for the cultured shrimp, Metapenaeus ensis, 200 individuals were collected between August, 1997, and June, 1998, and stomach contents investigated. A total of 46 species of macrobenthos was recorded: 11 polychaetes, 11 molluscs, 13 crustaceans and 11 insects. Mean species density in the five sub-habitats (seaward, middle, and landward parts of open water areas, and Phragmites- and Kandelia-dominated, vegetated areas) -2 -2 ranged from 0 to 3,907 individual-m, with mean biomass ranging from 0.00 to 96.94 g-m . The macrobenthos showed spatial and temporal differences among the sub-habitats and across sampling times. Species abundance of Polychaeta, Mollusca and Crustacea were significantly higher in the three open water areas than in the two vegetated (Phragmites- and Kandelia-dominated) areas, with an inverse pattern for Insecta. There were no clear seasonal patterns although abundance and biomass generally increased in winter time. Macrobenthic species richness, abundance and biomass were positively correlated with salinity, while the water depth, dissolved oxygen and sediment organic matter content had weak correlations with the macrobenthic assemblage parameters. Stomach contents of Metapenaeus ensis typically consisted of polychaetes, gastropods and crustaceans. The occurrence of gastropods in shrimp stomachs varied significantly among sampling dates and with size of shrimp. DOI: 10.5353/th_b2977534 Subjects: Benthic animals - Ecology - China - Hong Kong Shrimps - Feeding and feeds - China - Hong Kong Benthic animals - Ecology Shrimp culture


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This dissertation, "Macrobenthic Faunal Assemblages of a Traditional Tidal Shrimp Pond at Mai Po Marshes Nature Reserve, Hong Kong" by Tak-hang, Lui, 呂德恒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We This dissertation, "Macrobenthic Faunal Assemblages of a Traditional Tidal Shrimp Pond at Mai Po Marshes Nature Reserve, Hong Kong" by Tak-hang, Lui, 呂德恒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled MACROBENTHIC FAUNAL ASSEMBLAGES OF A TRADITIONAL TIDAL SHRIMP POND AT MAI PO MARSHES NATURE RESERVE, HONG KONG submitted by LUI Tak Hang for the degree of Master of Philosophy at The University of Hong Kong in August 1999 The Mai Po Marshes Nature Reserve makes up part of the largest wetland in Hong Kong. The marshes have acquired international recognition as an important stopping-over site for migratory waterbirds. The major area of the marshes consists of traditional tidal shrimp ponds. The composition and spatial distribution patterns of the macrobenthic faunal assemblages of a traditional tidal shrimp pond, and the role of the macrobenthos as food for cultured shrimp, were studied. Species richness, abundance and biomass of macrobenthos across 5 different sub-habitats within a traditional tidal shrimp pond at Mai Po Marshes were examined bimonthly between January, 1997, and January, 1998. Grabs were used to collect the sediment randomly across the sub-habitats. The physical environmental parameters of the sampling sites were measured. To assess the contribution of macrobenthic fauna as food for the cultured shrimp, Metapenaeus ensis, 200 individuals were collected between August, 1997, and June, 1998, and stomach contents investigated. A total of 46 species of macrobenthos was recorded: 11 polychaetes, 11 molluscs, 13 crustaceans and 11 insects. Mean species density in the five sub-habitats (seaward, middle, and landward parts of open water areas, and Phragmites- and Kandelia-dominated, vegetated areas) -2 -2 ranged from 0 to 3,907 individual-m, with mean biomass ranging from 0.00 to 96.94 g-m . The macrobenthos showed spatial and temporal differences among the sub-habitats and across sampling times. Species abundance of Polychaeta, Mollusca and Crustacea were significantly higher in the three open water areas than in the two vegetated (Phragmites- and Kandelia-dominated) areas, with an inverse pattern for Insecta. There were no clear seasonal patterns although abundance and biomass generally increased in winter time. Macrobenthic species richness, abundance and biomass were positively correlated with salinity, while the water depth, dissolved oxygen and sediment organic matter content had weak correlations with the macrobenthic assemblage parameters. Stomach contents of Metapenaeus ensis typically consisted of polychaetes, gastropods and crustaceans. The occurrence of gastropods in shrimp stomachs varied significantly among sampling dates and with size of shrimp. DOI: 10.5353/th_b2977534 Subjects: Benthic animals - Ecology - China - Hong Kong Shrimps - Feeding and feeds - China - Hong Kong Benthic animals - Ecology Shrimp culture

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