Influence of hydrographical parameters on the composition and seasonal variation of the plankton population in a prawn filtration pond
| dc.contributor.advisor | Raman, N N | |
| dc.contributor.author | Maya, Ramachandran | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2018-03-07T08:45:50Z | |
| dc.date.available | 2018-03-07T08:45:50Z | |
| dc.date.issued | 2009 | |
| dc.description.abstract | The present study was carried out in the prawn filtration pond located in the campus to study the influence of hydrographical parameters on the plankton population. Fortnightly samples were collected for the analysis of hydrographical parameters like salinity, water temperature, turbidity, pH, total alkalinity, total hardness, nitrate, phosphate, nitrite, silicate and dissolved oxygen. Samples for biological parameters like primary production, chlorophyll, phytoplankton and zooplankton also were collected fortnightly. Salinity increased with increase in alkalinity, hardness and pH. Highest average for salinity and pH occurred in postmonsoon. The peak temperatures were recorded during premonsoon which started showing declining trend with the onset of monsoon. But turbidity was highest during southwest monsoon due to runoff and churning up of the pond bottom due to low depth. Alkalinity and hardness showed correlation with pH indicating the presence of calcium and magnesium. Nutrients were effectively recycled in the pond due to shallow depth. This resulted in the absence of significant variation between postmonsoon and premonsoon. Throughout the study period due to the perennial nature of the pond and high primary production, dissolved oxygen values were high. Primary production values were high in premonsoon due to high light intensity and effective nutrient recycling. Chlorophyll and salinity showed correlation and might be due to the presence of euryhaline phytoplanktons in the pond. Total phytoplankton count was high in monsoon. The total zooplankton was limited in quantity and quality. The total zooplankton was maximum in premonsoon months. But no decrease was seen during monsoon. Major groups encountered were copepods, crustacean larvae, tintinids, nematodes, rotifers and veliger larvae. Copepods dominated the zooplankton and maximum number was collected during southwest monsoon. Crustacean larvae occupied the second position and were present in all the three seasons. Tintinids and nematodes were observed in high saline period and their number decreased with decrease in salinity. Rotifers were recorded during low saline period only. Veliger larvae were recorded during December, January and February. Total zooplankton did not show any significant correlation with hydrographical parameters except temperature and pH. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810041568 | |
| dc.keywords | Fishery Hydrography | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 106 | en_US |
| dc.publisher | Department of Fishery Hydrography, College of Fisheries, Panangad | en_US |
| dc.sub | Fisheries | en_US |
| dc.subject | null | en_US |
| dc.theme | seasonal variation of the plankton population | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Influence of hydrographical parameters on the composition and seasonal variation of the plankton population in a prawn filtration pond | en_US |
| dc.type | Thesis | en_US |