Seasonal abundance of assiminae brevicula (red berry snail) in the Bang pu and Samut Prakarn estuarine mangrove forests in relation to sediment characteristics | |
| Author | Ratthawit Panyachaipat |
| Call Number | AIT Thesis no.AQ-15-05 |
| Subject(s) | Snails Aquaculture |
| Note | A thesis submitted in partial fulfillment of the re quirements for the Degree of Master of Science in Aquaculture and Aquatic resource Management, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AQ-15-05 |
| Abstract | The abundance of red belly snails in the Chao Phray a Estuary, Samutprakarn province is becoming low in the last few years. The association of sediment characteristics and abundance of red berry snail ( Assiminea brevicular ) could not be similar in two sites of Bangpu and Lamfahpah mangrove forests in the Chao P hraya estuary. Hence, sediment characteristics and the abundance of red berry snai ls from both sites were determined and analysed during 3 months period (November 2014, Jan uary and March 2015) which all have difference seasons. The density of red berry snails were counted by qua drant of 1m 2 in each station during low tide, and all of the sediment characteristics were divided into 3 groups as biological, chemical and physical in the laboratory. Sediment characteri stics such as Extra Polymeric Substance (EPS), Chlorophyll-a, Bacteria density, pH temperat ure, Total Organic Carbon (TOC) , Total Organic Matter (TOM), Water content, Nitrogen, Phos phorus, Salinity, sediment particle and diversity index of micro-algae. Significant correlations were observed with abundan ce of red berry snails and some sediment characteristics within the 3 months study period wh ich has supported the hypothesis. Abundance of red berry snails in the Bangpu Mangrov e forest is related with Chlorophyll a in sediment at r 2 = -0.518 (P < 0.01) while EPS in sediment r 2 is 0.345 (P < 0.05). In addition abundance of red berry snails are related with wate r content in sediment r 2 = 0.583 (P < 0.01), Total Organic Matter r 2 = -0.353 (P < 0.05) and relationships of red berry snails with total organic carbon is r 2 = -0.353 (P < 0.035). Moreover, abundance of red b erry snails is still related with nitrogen at r 2 = 0.634 P < (0.001) which is a strong positive rel ationship. While abundance of red berry snails correlates with tempe rature as r 2 = 0.337 (P < 0.05) and diversity index of micro-algae is r 2 = -0.390 sig (P < 0.05). The relationship of abunda nce of red berry snails in Lamfahpah with chlorophyll a in sediment is at r 2 = -0.548 (P< 0.001),Nitrogen r 2 = 0.347(P< 0.05), pH r 2 = -0.357 (P<0.033) and diversity index of micro-al gae r 2 = -0.390 (P<0.01). Therefore, considering both study sites EPS, WTC an d Nitrogen are positively correlated with abundance of red berry snail while Chlorophyll a, TOM, TOC, Diversity index of micro- algae and pH negatively affected. |
| Year | 2015 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AQ-15-05 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Aquaculture and Aquatic Resources Management (AQ) |
| Chairperson(s) | Salin, K.R. |
| Examination Committee(s) | Yukupitiyage, Amararatne;Bhujel, Ram C. |
| Scholarship Donor(s) | Royal Thai Government Fellowship;AIT Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2015 |