Community changes in Zooplankton and Macrobenthos of a prawn culture field in relation to hydrographical conditions (Record no. 27191)
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000 -LEADER | |
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fixed length control field | 03520nam a2200181Ia 4500 |
003 - CONTROL NUMBER IDENTIFIER | |
control field | OSt |
005 - DATE AND TIME OF LATEST TRANSACTION | |
control field | 20220305112211.0 |
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
fixed length control field | 140128s9999 xx 000 0 und d |
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
Classification number | 639.2 |
Item number | SHR/CO |
100 ## - MAIN ENTRY--PERSONAL NAME | |
Personal name | Shreeram Sudheer Gubba |
245 ## - TITLE STATEMENT | |
Title | Community changes in Zooplankton and Macrobenthos of a prawn culture field in relation to hydrographical conditions |
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
Place of publication, distribution, etc. | Panangad |
Name of publisher, distributor, etc. | Department of Fishery Hydrography, College of Fisheries |
Date of publication, distribution, etc. | 2003 |
502 ## - DISSERTATION NOTE | |
Degree type | MFSc |
520 3# - SUMMARY, ETC. | |
Summary, etc. | The present study was carried out in the prawn filtration field of the College of Fisheries at Panangad adjacent to the Cochin backwater system to find out the faunal variations of zooplankton and macrobenthos and to correlate them with the variations in hydro graphic conditions and compare the results with those obtained from the observations in the adjacent lake. Monthly samples for hydro graphical and biological studies were collected during the period from November 2002 to July 2003 from the culture field and adjacent backwater. Hydrographical features like temperature, salinity, transparency, pH, total alkalinity, dissolved oxygen, nitrate-N, phosphate-P, silicate-Si were observed. Crustacean larvae, copepods, tintinnids, nematodes, rotifers and veliger larvae of molluscs were the zooplankton groups obtained in the present study. Crustacean larvae and copepods were the dominant groups in both places and were found during all the months whereas tintinnids and nematodes were observed during saline period and their number decreased with decreasing salinity. Rotifers were recorded during low saline period only. Veliger larvae were recorded during December and February in the culture field, whereas, they were not present in the samples form the adjacent backwater. Statistical analysis for the influence of hydrographical parameters on the zooplankton showed that none of these had significant influence independently and the variations in the zooplankton abundance may be due to the combined effect of all these factors. Even though the seasonal changes in the total zooplankton were not pronounced the per cent composition of different groups showed fluctuation. Tanaidaceans, gastropods, polychaetes, amphipods, bivalves, isopods and chironomid larvae were the benthic groups obtained. Among these 112250 124 gastropods, tanaidaceans and polychaetes were the dominant forms. In the culture field benthic populations were maximum during the post-monsoon months and a showed a decreasing trend during pre-monsoon. With the onset of the monsoon they showed an increasing trend. In the backwater high benthic abundance was observed during January and February when high salinity prevailed and gradually decreased from March onwards reaching the minimum in July. In the culture field benthic abundance was mainly influenced by substratum characteristics and pH, whereas in the adjacent backwater salinity also played a role. The area of the present study is away from the barmouth and the nutrient levels especially phosphate is low in the culture field. This may be limiting the primary productivity of the area leading to low secondary production in terms of zooplankton and macrobenthos in the culture field. The high pH noticed in the culture field may be another reason for the low productivity. |
700 ## - ADDED ENTRY--PERSONAL NAME | |
Personal name | Cherian C J (Guide) |
856 ## - ELECTRONIC LOCATION AND ACCESS | |
Uniform Resource Identifier | https://krishikosh.egranth.ac.in/handle/1/5810154905 |
942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
Source of classification or shelving scheme | |
Koha item type | Theses |
Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
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KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2014-03-18 | 639.2 SHR/CO | 172250 | 2014-03-18 | 2014-03-18 | Theses |