| dc.contributor.advisor | Professor Dr. Zannatul Ferdoush | |
| dc.contributor.author | SARDER, TARIKUL HAQUE | |
| dc.date.accessioned | 2022-04-23T08:46:48Z | |
| dc.date.available | 2022-04-23T08:46:48Z | |
| dc.date.issued | 201-06 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/671 | |
| dc.description | Bangladesh is located in the delta of the Ganges-Brahmaputra-Meghna river system. The
country is traversed by a vast network, approximately 24 thousand kilometers of huge
rivers with their tributaries and distributaries, mountain streams, winding seasonal creeks
and canals. Moreover, a wide portion of land of Bangladesh is covered by large rivers
such as the Padma, the Jamuna, the Teesta, the Meghna, the Brahmaputra and the Surma
river. There are 405 rivers lying across the country, of which 57 are trans-boundary. All
of these rivers are connected to the Bay of Bengal. The total area of inland water is about
39, 07,488 hectares of which the area of river and estuaries is about 85, 38, 63 hectares. | en_US |
| dc.description.abstract | Plankton functions the key role by transferring the food energy to higher trophic level in
the ecosystem and often influenced by the environmental variability in inland
waterbodies. A study was carried out to investigate plankton diversity and associated
physico-chemical parameters of Atrai river from Dinajpur district in Bangladesh.
Fortnight water sampling was performed at three sites namely Poromeshpur, Rubber dam
and Mohonpur from Atrai river during July 2016 - February 2017. Collected samples
were analyzed in the laboratory of Department of Fisheries Management, Faculty of
Fisheries, Hajee Mohammad Danesh Science and Technology University (HSTU),
Dinajpur. Shannon-Wiener index and Evenness index were used to calculate the
diversity indices of plankton. ANOVA showed a significant variation (P < 0.05) in
physico-chemical parameters among the sites. Mean value (±SD) of water temperature,
pH and DO were 25.52±4.630C, 25.19±4.630C and 25.89±4.620C; 7.64±0.31, 7.81±0.31
and 7.47±0.35 and 7. 7.45±0.96, 7.91±0.98 and 7.06±1.06 mg/l in site 1, 2 and 3
respectively. Higher dissolved oxygen concentration was observed in site 1 while, pH
was significantly variable among the sites during the study period. Moreover, there were
significant variations in plankton abundance among the sites in Atrai river. However, the
abundance of copepod and crustacean larvae did not show significant variation among
the sites. A total of 57 genera of plankton were identified composed of 43 genera of
phytoplankton and 14 genera of zooplankton. The abundance of chlorophyceae was
higher (13.5×103 cells/l) followed by cyanophyceae (5.40×103 cells/l) at site 1 in January
2017. Total zooplankton found higher at site 1 in January 2017. Comparatively lower
abundance of plankton (10.88×103 cells/l) was observed at site 3 in July 2016.
Phytoplankton showed a Shannon-Wiener index value between 2.503 and 3.520 where,
the Evenness index was from 0.884 to 0.941. In case of zooplankton Shannon-Wiener
index showed the value from 1.468 to 2.295 and Evenness index value was 0.898-0.966.
Overall, the diversity of plankton indicates variable biological productivity in the Atrai
river of Dinajpur | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR | en_US |
| dc.subject | ATRAI RIVER | en_US |
| dc.subject | Water Quality | en_US |
| dc.subject | Physical parameters | en_US |
| dc.title | LIMNOLOGICAL ASPECTS OF ATRAI RIVER IN DINAJPUR, BANGLADESH | en_US |
| dc.type | Thesis | en_US |
