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Depths Nematodes Cope pods Foraminifers M.G* Total 30 m 56.7 31.0 SOm 24.6 9.0 7S m 10.7 22.6 lOO m 6.5 37.4 ISO m 1.5 0.0 --------------------------- 44.4 20.7 11.8 14.8 8.2 19.7 25.2 23.0 28.5 3.6 Table 13 - Percentage contribution of meiobenthic groups in different depths M. G* - Miscellaneous groups Transects Depths Nematodes Foraminifers Cope pods M.G* Off Mormugao 30m 46 12 0 33 75m 136 34 0 67 lOOm 1740 624 0 27 Off Ratnagiri 30m 177 0 2 34 75m 77 7 0 19 Off Mumbai 30m 170 0 0 108 75 m 1506 886 50 241 OffVeraval 30m 338 14 11 10 75m 91 90 13 18 Off Dwaraka 30m ]23 13 11 25 75m 102 52 2 10 100 m 89 16 0 5 Average 383 146 7 50 '10 65.34 24.86 1.27 8.49 Table 14 - Distribution of meiobenthic density (NolI 0 cm 2 ) during pre-monsoon M. G* - Miscellaneous groups 54.5 23.9 11.5 8.4 1.7 Total --- 91 237 2391 213 103 278 2683 373 212 172 166 110 586 123
Biomass 30m 50m 75m lOOm 150m ----_ .. _--- Polychaetes 1.1841 (8) 0.4478 (7) 1.6782 (8) 1.1021 (8) 0.5432 (6) Crustaceans 1.5840 (8) 1.2902 (7) 1.4058 (8) 1.0498 (8) 0.7928 (6) Molluscs 0.9181 (8) 1.5868 (7) 0.8002 (8) 0.4768 (8) 0.2453 (6) Others 0.2671 (8) 1.5153 (7) 2.4222 (8) 0 0 Total 0.9426 (8) 0.1568 (7) 2.1625 (8) 0.8501 (8) 1.0104 (6) Density Polychaetes 1.8842 (8) 0.1847 (7) 1.5981 (8) 6.4973 (8) 1.4782 (6) Crustaceans 1.0106 (8) 0.4817 (7) 2.0775 (8) 0.7676 (8) 1.2390 (6) Molluscs 1.58 (8) 0.8589 (7) 2.0532 (8) 1.5429 (8) 1.0968 (6) Others 1.7746 (8) 2.0786 (7) 1.7438 (8) 0 0 Total 1.7209 (8) 1.2604 (6) 1.7981 (8) 9.4887 (8) 1.3558 (6) Table 15- Seasonal comparison ofmacrobenthic biomass and density based on Student's t test in different depths (Degree of freedom is given in bracket). 12
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Certificate I hereby certify that t
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Contents Page No. Chapter 1. Introd
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the bottom. Ekman (1935) described
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wonns are the most abundant group a
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leadership of Sir James Clark Ross,
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Ansari et al., (1977b) carried out
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Gopalakrishnan and Nair (1998) cond
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Major objectives:- 1. To understand
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CMFRI (Central Marine Fisheries Res
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Joydas, T.V., Damodaran, R., 2001.
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monitoring committee (Atlantic Mari
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Vizakat Lathika, I-Iarkantra, S. N.
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analysed after acidification by tit
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used as stain prior to sorting and
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space. Therefore, it is very essent
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Fig. I - Station locations 32
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affected at high temperature. Most
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layers exhibit different oceanograp
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Transect wise variation in temperat
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3.2.2.3. Dissolved oxygen (DO) Dist
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monsoon temperature initially incre
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opined that limited mixing. high or
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Naqvi, S. W. A., Noronha, R. J., Re
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orr Mormugao orr Vernal 35.36 35.32
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The continental shelf and its adjoi
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sediments (4 stations). Silty sand
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fine sediments with comparatively h
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Narayana, 1991 ). Limited input of
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In general. two ditlerent patterns
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et al., (1980) reported values in t
Page 77 and 78: organisms living in the water and t
Page 79 and 80: Hashimi, N. H., Kidwai, R. M., Nair
Page 81 and 82: Postma, H., 1967. In Estuaries, Lau
Page 85: Depths Sand Silt Clay Organic matte
Page 90: • PRE'MONSOON SOUTHERN'TRANSECTS
Page 96 and 97: as the best indicators of the envir
Page 99 and 100: showed that northern transects have
Page 101 and 102: decreased from shallow to deeper de
Page 103: different depth zones showed that a
Page 106 and 107: cm 2 with a dominance of nematodes.
Page 108 and 109: and 6.08 g/m 2 were recorded during
Page 110 and 111: were located in the nearshore water
Page 112 and 113: changes in the hydrographical and t
Page 114 and 115: factor for such a large difference
Page 116 and 117: Belegvad, H., 1932. Investigations
Page 118 and 119: Parulekar, A. H., Harkantra, S. N.,
Page 120: Savich, M. S., 1972. Quantitative d
Page 123 and 124: Traosects Polychaetes Crustaceans M
Page 125: Miscellaneous Transects Nematodes C
Page 136 and 137: Wagh, 1975; Parulekar et ai, 1976;
Page 138 and 139: ones and 17 were included in the 'r
Page 140 and 141: Nephtydae (2%). Among the 20 sedent
Page 143 and 144: At 75 m zone, 31 groups/species wer
Page 145 and 146: Porbandar. At 50 m depth zone, fluc
Page 148 and 149: otTMumbai and Ratnagiri and low eve
Page 150 and 151: species richness at each depth zone
Page 153 and 154: E2.2.2.!. Richness (Margalef's inde
Page 155: I ):.2.2.2.4. Dominance (Pie/ou's i
Page 172 and 173: Tablc 17. Contd .. - Sternaspidae 0
Page 176: Table 20. contd .. G. alba 20 25 20
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150 Taxa 30m 50m 75m lOOm 150 m m D
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9% 1% o poIychaete • crustacea o
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a) c) e) g) Plate 5 a) Prinospio sp
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a) c) e) Plate 7 a) Cardium sp. d)
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7/. /ntroduct ion 7.2. Hydrography
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also showed a similar pattern with
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y most of the organisms. It was als
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with sand of which total density (r
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muddy bottom of the west coast of I
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crustaceans and miscellaneous group
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the organic rich environment with h
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Icvci (p
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mcioHmna serve primarily as rapid m
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surface chlorophyll a was 0.36mg I
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Devassy, V. P., Achuthankutty, C. T
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Longhrust, A. R., Pauly, D., 1987.
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Sikora, W. B., 1977. The ecology of
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Faunal groups Silty Clayey Mixed Sa
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Mannagoa to Porbandar located betwe
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against gastropods during pre- mons
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