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| Last Updated: :27/01/2022

BIBLIOGRAPHY

Title :  A case study on the impact of industrial effluent disposal on the fishery of Amba River estuary, Maharashtra.
Subject :  A case study on the impact of industrial effluent disposal on the fishery of Amba River estuary, Maharashtra.
Volume No. :  25
Issue No. : 1
Author :  Gajbhiye, S.N., Mehta, P., Mustafa, S. and Nair,V.R.
Printed Year :  1995
No of Pages  :  25-38
Description : The impact of waste discharge on fishery resources is a matter of great concern. The accepted norm in all environmental impact assessment studies is to avoid areas of high fishery potential while locating a marine outfall. Contemplating on this aspect a case study was conducted in the Amba River estuary before and after the establishment of a petrochemical complex at Nagothane. The treated wastewater from this complex is released through a subsurface outfall after adopting effective control measures for marine disposal of waste. Experimental trawling was done at five locations covering a distance of 30 km during 1990 to 1991. The catch rate within the estuary varied from 0.6 to 255 kg/h (av 24 kg /h). The trend indicated considerable decrease in fishery potential from the mouth of the estuary (av 64 kg/h) to the upstream location (av 11 kg/h). A total of 49 species of fishes, 16 species of prawns, 7 species of crabs and 1 species of lobster were identified from the collections. Number of species gradually increased from the interior segment at Dharamtar (8) to the outer area near Revas (18). A comparison of the quantitative and qualitative nature of the post outfall and preoutfall data revealed only marginal difference. The study indicates that if necessary precautions are taken to render the waste harmless the marine ecology will hardly be affected.
Title :  A new approach for finding out the bioaccumulation rate of heavy metals in tissues of Liza parsia.
Subject :  A new approach for finding out the bioaccumulation rate of heavy metals in tissues of Liza parsia.
Volume No. :  35
Issue No. :  1
Author :  Mohapatra, B.C. and Rengarajan, K.
Printed Year :  1998
No of Pages  :  34-39
Description : Through field and laboratory studies, a concept has been developed for finding out the differential rate of bioaccumulation of some heavy metals such as copper, zinc and lead in different tissues of mullet Liza parsia (Hamilton-Buchanan). This new approach for finding out the maximum bioaccumulation employed a series of experiments, statistical and graphical interpretations and has put forth a concept for future investigations with different bio-accumulative toxicants.
Title :  A report of an unusual Tripod fish
Subject :  A report of an unusual Tripod fish
Volume No. :  32
Issue No. : 1
Author :  Annabel, R., Gunasingh,A.,Vassanda, E. and Pushparaj, N.
Printed Year :  2005
No of Pages  :  313-314
Description : Karaikal, Mahe, Yanam and Pondicherry, the union territories, are endowed with estuaries. Chunnambar estuary in poindicherry receives fresh water during monsoon months from varahanadhi also called Sankara-barani and receives seawater from the Bay of Bengal. The estuary is shrinking due to anthropological onslaughts of nearby urban pondicherry. During the past few years the flow of fresh water has come down due to successive droughts. Inspite of this situation, the species diversity and species richness are significant in this estuary.
Title :  A report on intertidal macrofauna of Talsari (Balasore
Subject :  A report on intertidal macrofauna of Talsari (Balasore
Volume No. :  106
Issue No. :  3
Author :  Mitra, S and Misra, A.,
Printed Year :  2006
No of Pages  :  131-141
Description : Talsari is a less popular tourist spot of Orissa, situated on the tributaries of Subarnarekha Estuary. Despite of Anthropogenic pressure and various types of fishing activities, this place is rich in marine faunal diversity. The first author investigated the intertidal faunal resources of this area since 1995 to 2003. As several types of marine habitats are found in this small area (2.5 sq. km. only), different types of faunal composition are found here in distinct zonation. Previously Goswamy (1992) reported some marine fauna of Digha coast. Rao & Misra (1986) reported the Macrofauna of Digha Beach of West Bengal. Very recently Chatterjee & Mitra (2003) reported the Estuarine Molluscs of Talsari. But till date there is no comprehensive report on the intertidal fauna of this region. Bairagi (1995); Subba Rao et al., (1792) and Mitra et al., (1997, 1998) contributed on some marine fauna of Digha coast. The present paper deals with a comprehensive list comprising 90 species belonging to seven phyla of the Intertidal Macrofauna of Talsari with short notes on habitat choice, zonation, status of availability, threats and some recommendation for their conservation.
Title :  A Reported on intertidal macrofauna of Talasari (Balasore
Subject :  A Reported on intertidal macrofauna of Talasari (Balasore
Volume No. :  106
Issue No. :  3
Author :  Mitra., S. and Misra., A.
Printed Year :  2006
No of Pages  :  131-141
Description : Talsari is a less popular tourist spot of Orissa, situated on the tributaries of Subarnarekha Estuary. Despite of Anthropogenic pressure and various types of fishing activities, this place is rich in marine faunal diversity. The first author investigated the intertidal faunal resources of this area since 1995 to 2003. As several types of marine habitats are found in this small area (2.5 sq. km. only), different types of faunal composition are found here in distinct zonation. Previously Goswamy (1992) reported some marine fauna of Digha coast. Rao & Misra (1986) reported the Macrofauna of Digha Beach of West Bengal. Very recently Chatterjee & Mitra (2003) reported the Estuarine Molluscs of Talsari. But till date there is no comprehensive report on the intertidal fauna of this region. Bairagi (1995); Subba Rao et al., (1792) and Mitra et al., (1997, 1998) contributed on some marine fauna of Digha coast. The present paper deals with a comprehensive list comprising 90 species belonging to seven phyla of the Intertidal Macrofauna of Talsari with short notes on habitat choice, zonation, status of availability, threats and some recommendation for their conservation.
Title :  Algal diversity of coastal West Bengal in relation to water quality
Subject :  Algal diversity of coastal West Bengal in relation to water quality
Volume No. :  25
Issue No. :  1-2
Author :  Arpita Mukhopadhyay, Partho Chattapadhyay and Ruma Pal
Printed Year :  2003
No of Pages  :  69-76
Description : In an initial survey of estuarine region of North and south 24- parganas of Coastal West-Bengal, several species of Cyanophyceae, Chlorophyceae, Bacillariophyceae, Dinophyceae and Rhodophyceae have been recorded and their growth and seasonal abundance in relation to different environmental parameters have been studied. Hugli, Matla and Bidya estuary of the eastern part were included in the study area. A large number of phytoplankton species were recorded from the Hugli estuary, but in Matla estuary, a large number of macro-algal species belonging to Chlorophyceae, Ulvophyceae and Rhodophyceae were dominant in the swampy areas. These algae were collected and unialgal laboratory cultures were set up to study the reproductive behaviour and their growth potentiality in vitro. Phytoplankton species were collected by plankton net and water samples were analysed for different parameters like phosphate, nitrate, BOD, salinity etc.
Title :  An ornate new species of Macrobrachium bate, 1868 (Palaemonidae) from Kerala, India
Subject :  An ornate new species of Macrobrachium bate, 1868 (Palaemonidae) from Kerala, India
Volume No. :  36
Issue No. :  1
Author :  Jayachandran, K.V. and Raji, A.V.
Printed Year :  2004
No of Pages  :  41-44
Description : An ornate new species of Macrobrachium bate, 1868 (M. ornatus) is described. This species is characterized by moderately long convex rostrum, which extended as far as the tip of antennal scale, with 8/4 (2 post-orbital) teeth. The second cheliped was characteristic, in which the carpus was equal to ischium, palm and fingers which is unique among the species of Macrobrachium. Some details of moulting and growth and food of the prawn was also recorded. The species is beautiful in coloration and possessed good qualities for aquarium keeping.
Title :  Antifouling compounds from seaweed marine halophytes
Subject :  Antifouling compounds from seaweed marine halophytes
Volume No. : 1
Issue No. : 1
Author :  Prakash Williams, G., Ravikumar, S., Saivathurai, K. and Abideen, S.
Printed Year :  2004
No of Pages  : 1
Description : The intensity of microfouling in Rajakkamangalam estuary was carried out by immersing two different panels (Stainless steel and Acrylic). Stainless steel was found to be less favour for the attachment of microfoulers than Acrylic panels. Increased microfouling was observed with the increased exposure time. Six bacterial foulers viz, Pseudomonas sp., Escherichia sp. and Salmonella sp., Vibrio sp., Streptococcus sp., and Clostridium sp. and two fungal foulers viz. Alternaria sp. And Aspergillus sp. Were recorded in the present study. The Aspergillus sp. was found to be the predominant fungal species (19%) and Pseundomonas sp and Vibrio sp. (15%) were found to be the dominant bacterial species. Among the bacterial species, Escherichia sp. was highly inhibited by the methanolic extracts of Dichtyota dichotoma whereas Aspergillus sp. Was highy inhibited by the methanolic extracts of Sargassum wightii.
Title :  Antimicrobial Activity of three selected macrophytes of southern India
Subject :  Antimicrobial Activity of three selected macrophytes of southern India
Volume No. :  8
Issue No. :  2
Author :  Maya, S., Maragatham, T. and Iyer, C.S.P.
Printed Year :  2005
No of Pages  :  101-107
Description : Though marine algae have been studied to explore the possibilities of production of antibiotics during the past decade, freshwater algae and angiosperms have not been subjected to similar studies, to a great extent. In this context, the present work was undertaken to compare the anitimicrobial activities of three aquatic macrophytes viz., Ulva fasciata Delile a marine alga, oscillatoria mougeotii Kutz a freshwater alga and Hydrilla verticillata Royle a freshwater angiosperm collected from southern Kerala. Ulva fasciata showed maximum activity followed by H. verticillata; freshwater alga Oscillatoria appeared to have least antimicrobial activity followed by H. verticillata; freshwater alga Oscillatoria appeared to have least antimicrobial activity. The extracts from U. fasciata and H. verticillata were subjected to thin layer chromatographic separation, and the separated compounds were studied using a UV-Visible spectrophotometer. Besides chlorophyll, antimicrobial property in U. fasciata is traced to the presence of acrylic acid and that of H. verticillata to presence of flavonoids.
Title :  Application of an index of biotic integrity (IBI) to fish assemblage of the tropical Hooghly estuary
Subject :  Application of an index of biotic integrity (IBI) to fish assemblage of the tropical Hooghly estuary
Volume No. :  53
Issue No. :  1
Author :  Manas Kr. Das and Srikanta Samanta
Printed Year :  2006
No of Pages  :  47-57
Description : The index of biotic integrity (IBI) was applied in 117 km stretch of the fresh water zone of Hooghly estuary in India and the effect of anthropogenic stress on fish assemblage integrity was evaluated. Seven new metrics viz., native species richness, native family richness, benthic species richness, water column species richness, % non-native individuals, % tolerant individuals and % herbivorous individuals were added retaining five original metrics. The number of native species and families, number of water colum species, number of benthic species, number of intolerant species and percent individuals as herbivores decreased significantly (P< 0.01) whereas the percentage of tolerant species, percent individual as omnivores and percent individual as carnivores increased significantly (P<0.01) in the anthropogenically stressed sites. The index of biotic integrity (IBI) is significantly lower at the stressed sites downstream. Based on the modification of IBI only 3 or 50% of the sample sites supported fishery in acceptable condition.
Title :  Ashtamudi estuary as a nursery ground for Indian oil sardine, Sardinella longiceps (Val.).
Subject :  Ashtamudi estuary as a nursery ground for Indian oil sardine, Sardinella longiceps (Val.).
Volume No. :  44
Issue No. :  1-2
Author :  Harikrishnan, M. and Madhusoodana Kurup, B.
Printed Year :  2002
No of Pages  :  136-144
Description : Fishery survey cruises conducted in Ashtamudi estuary, Kerela, S.India (latitude 8�45�- 9�28�N and longitude 75�28�-77�17�E) revealed the unusual occurrence of large shoals of oil sardine, Sardinella longiceps (Val.) young ones contributing to the fishery in the estuary at significant levels. Exploited stock of this species in December was constituted by size ranging from 90 to 159 mm with a modal size at 106mm while a remarkable shift in the length composition could be discernible in April, when 92% of the stock was constituted by individuals in the range 120-139 mm with a modal length at 122mm. an attempt was also made to quantify the exploited juvenile stock of the lake during the study period, which declined significantly from 57.5 tonnes in December, 2000 to 5.4 tonnes in April 2001. Gill nets and cast nets were found to contribute more than 60% of the total landings. The Ashtamudi estuarine system serving as a nursery ground for fingerlings of oil sardine has been highlighted.
Title :  Availability of grey mullet spawners in Adayar Estuary and Kovalam Backwater around Madras, India
Subject :  Availability of grey mullet spawners in Adayar Estuary and Kovalam Backwater around Madras, India
Volume No. :  36
Issue No. :  1-2
Author :  Mohanraj, G., Nammalwar, P., Kandaswamy, S. and Sekar, A.C.
Printed Year :  1994
No of Pages  :  167-180
Description : A survey of the grey mullet spawners in Adayar Estuary and Kovalam Backwater around Madras was conducted for 2 years from July 1985 to June 1987. Availability of spawners of different species of grey mullet Mugil cephalus, Liza macrolepis, L. parsia and L. tade in the areas surveyed was assessed. It is evident from the data that the spawners of M. cephalus are abundant from October to January. The peak availability of spawners of L. macrolepis is from January to July. In the case of L. parsia the spawners are available from December to March and June to August whereas, L. tade spawners occur from November to January.
Title :  Benthic biomass of Porto Novo waters in relation to environmental parameters.
Subject :  Benthic biomass of Porto Novo waters in relation to environmental parameters.
Volume No. : 1
Issue No. : 1
Author :  Asokan, S. and Ayyakkannu, K.
Printed Year :  1995
No of Pages  :  25-29
Description : An attempt was made to study the benthic biomass (dry weight) in relation to environmental parameters such as salinity, temperature, dissolved oxygen and pH. These studies were carried out in three stations of Porto Novo waters viz., marine zone, gradient zone and Killai back waters. The study indicated that the benthos of Porto Novo waters consisted of four major groups viz., polychaetes, crustacea, bivalves, gastropods and other miscellaneous forms such as coelenterates, amphipods, copepods and gobid fishes. 18 species of polychaetes, 6 species of bivalves, 3 species of gastropods and 2 species of crustacea were recorded. The biomass of benthos in terms of dry weight varied from 0,34 to 1.96 g/m2. To know the relationship among the environmental parameters, benthos and stations, appropriate statistical analyses were made.
Title :  Benthic fauna of Thenagapatnam estuary along southwest coast of India
Subject :  Benthic fauna of Thenagapatnam estuary along southwest coast of India
Volume No. : 1
Issue No. : 1
Author :  Vasantha, R., Prabha Devi, L. and Natarajan, P.
Printed Year :  2004
No of Pages  :  352-359
Description : A detailed study was undertaken to assess the benthic communities of the Thengapatnam estuary. The various aspects considered for the study included population density, species composition, species diversity, species richness and species evenness. Standard procedures were followed to estimate these components and the results revealed that the population density of the benthic fauna at different stations varied from 108 nos / m2 to 1216 nos / m2. Their abundance in relation to various stations showed that the population density was high at station II and low at station IV. Foraminifera, nematodes, polychaetes, oligochaetes, ostracods, harpacticoids, isopods, amphipods, decapods and molluscs represented the benthic fauna. Among the various forms reported, the polychaetes constituted the major component. The species diversity of the estuary ranged between 0.38 bits/individuals and 1.79 bits/individuals. Species richness was high at station I (0.68 bits / individuals) and low at station IV (0.19 bits / individuals). The species evenness varied from 0.29 bits / individuals to 0.61 bits / individuals. The possible reasons for the abundance of benthos in Thengapatnam estuary are discussed.
Title :  Benthic primary production in the mangrove and non mangrove areas of brackishwater impoundment along Nethravathi estuary
Subject :  Benthic primary production in the mangrove and non mangrove areas of brackishwater impoundment along Nethravathi estuary
Volume No. :  52
Issue No. :  4
Author :  Rajesh, K.M., Gowda, G. and Mridula, R.M.
Printed Year :  2005
No of Pages  :  489-493
Description : Benthic primary production in the mangrove and non mangrove areas were studied for one year from Feb 1998 to Jan 1999. Mangrove area recorded higher benthic primary productivity, chlorophyll-a, phaeopigments, phytoplankton biomass, sediment nutrients and organic carbon than non mangrove area. Benthic primary productivity has got significant correlation coefficient with temperature of water and sediment, salinity, phytoplankton and chlorophyll-a of the sediment. Seasonally, premonsoon period recorded higher phytobenthic production followed by postmonsoon and monsoon season.
Title :  Biochemical Composition of estuarine hermit crab clibanarius longitarsus (De Haan)
Subject :  Biochemical Composition of estuarine hermit crab clibanarius longitarsus (De Haan)
Volume No. : 1
Issue No. : 1
Author :  Ajmal Khan, S., Ramesh, S. and Lyla, P.S.
Printed Year :  2005
No of Pages  :  31-43
Description : In the present study, biochemical composition of an estuarine hermit crab Clibanarius longitarsus was studied. Biochemical constituents in tissues as muscle and hepatopancreas of both the sexes varied in relation to the size. Total protein (40.85 %) was high in hepatopancreas (males) of 5-10 mm size group. Total lipid (12.60 %) and ash (22.55%) contents were also observed to be more in hepatopancreas (females) but in the size group 20-25 mm. The increased moisture (81.45%) and total carbohydrate (5.5%) contents were found in muscle (females) and hepatopancreas (males) respectively in the size group 20-25 mm. Total carbohydrate & ash content of males and total carbohydrate & total lipid of females did not change significantly between different size groups. Satuarated fatty acids showed highest values in hepatopancreas of females and the proportion of w-3 and w-6 fatty acids showed higher ratio (3
Title :  Biodiversity of Macrobenthos on the Intertidal flats of Sunderban estuarine region, India
Subject :  Biodiversity of Macrobenthos on the Intertidal flats of Sunderban estuarine region, India
Volume No. :  101
Issue No. :  3-4
Author :  Khan, R.A.,
Printed Year :  2003
No of Pages  :  181-185
Description : Estuaries are highly dynamic and interesting ecosystem where strong transition between sea and freshwater exists (Mclusky, 1971). The mixing of fresh and marine water produces complex effects on the entire abiotic and biotic conditions of the ecosystem including sedimentation, salinity, nutrients-levels, productivity and diversity and abundance of fauna. The tidal nature of estuaries exposes periodically vast areas of intertidal flats, during low tides, which harbour a specialized community of macrobenthic invertebrates. Because of their great importance, both in trophic dynamics of the ecosystem and as indicator of the quality of environment, these communities have gained considerable attention both in India (Panikkar and Aiyer, 1937; Balssubramaniyam, 1960; McIntyre, 1964; Maclachlan, 1971; Anset et al., 1972, 1978; Ajmal Khan et al., 1975; Parulekar et al., 1975; Dwivedi et al., 1975; Bhunia and Choudhury, 1981;Govindan et al., 1983; Choudhury et al., 1984 and Fernando, 1987) and elsewhere (Spooner and Moore, 1940; Brady, 1943; Holme, 1949; Carriker, 1967; Dawn, 1971; wolff, 1973; Sasekumar, 1974; Khayrylla and Jones, 1975; Wildish and Kristmanson, 1979; Maurer and Lathern, 1979; Andrew et al., 1980; Alongi, 1987 and Elliot and Kingston, 1987). However, barring a few, most of the studies were mainly carried out from the viewpoint of density or productivity, without making much efforts to analyse the specific structure of the community. It is only during the last few years that serious attempts have been made in this direction in different parts of the world (Elliot and Kingston, 1987; Barr et al., 1990; Attrill et al., 1996). However, from the Indian estuaries not many reports are yet available, more so from the most important and largest estuarine complex-the Hugly-Matla, which is formed by the major Indian river, Ganga. The lower zone of this system on the delta forms Sunderban estuarine and mangrove region. Therefore, the present investigations were undertaken to study the benthic macroinvertebrates-occurrence, abundance and diversity on intertidal flats of Sunderban estuarine region, specially from the view point of assessing the spatial variations in biodiversity patterns between different areas and zones associated with major contributing estuaries. In order to make proper comparison, areas situated in mid-estuarine zone of the Major River Hugly have also been included.
Title :  Biofilm ? can it form an alternate food source in culturing cyclopoid copepod, Oithona rigida Giesbrecht? ? A case study.
Subject :  Biofilm ? can it form an alternate food source in culturing cyclopoid copepod, Oithona rigida Giesbrecht? ? A case study.
Volume No. :  19
Issue No. :  2
Author :  Thomas, Biji, K., Manikandan, K.P., Perumal, P. and Rajkumar, M.
Printed Year :  2004
No of Pages  :  197-203
Description : Most controlled feeding experiments with zooplankton have used phytoplankton species endemic to the surface waters of the ocean as food. The intertidal areas have an important role in estuarine ecology, where the epibenthic algal community (Biofilms) along with exopolymer mucus secretions of bacteria and diatoms are potential food for benthic and water column animals. A considerable input of intertidal biofilms into the water column occurs as a result of tidal resuspension. The study on these alternate pathways may provide valuable information on the food-chain energetics of estuarine zooplankton.
Title :  Biomass and composition of zooplankton in Auranga, Ambika, Purna and Mindola estuaries of South Gujarat.
Subject :  Biomass and composition of zooplankton in Auranga, Ambika, Purna and Mindola estuaries of South Gujarat.
Volume No. :  10
Issue No. : 1
Author :  Vijayalakshmi R. Nair, Gajbhiye, S.N., Jiyalal Ram, M. and Desai, B.N.
Printed Year :  1981
No of Pages  :  116-122
Description : Mean biomass of zooplankton in Auranga, Ambika, Purna and Mindola estuaries were 4.31, 3.46, 3.58 and 3.17ml/100 m3 respectively. Relatively higher biomass was recorded during ebb period in Auranga, Purna and st 1 of Ambika. In Mindola and st 2 of Ambika the flood period sustained higher biomass. Copepods, molluscan veligers, decapod larvae, mysids and chaetognaths were caught in higher abundance during the flood conditons. The prevailing water quality of Ambika and Mindola indicates deteriorating conditons and consequently some reduction in biomass and population density of certain groups were observed.
Title :  Biomass and quantitative indices of phytoplankton in Mandovi Zuari estuary.
Subject :  Biomass and quantitative indices of phytoplankton in Mandovi Zuari estuary.
Volume No. :  50
Issue No. :  3
Author :  Krishna Kumari, L. and Julie John,
Printed Year :  2003
No of Pages  :  401-404
Description : Biomass in terms of Chlorophyll a, cell density and quantitative indices of phytoplankton from two estuarine stations and a coastal station off Goa has been studied during 1997-98. Biomass in terms of Chlorophyll a averaged 1.1, 1.3 and 1.4 mg/m3 and cell density 0.72, 0.82 and 0.77 x 104 cells/l respectively at Stns. 1, 2 & 3. Diatoms contributed 85.55, 95.55 and 92.22% respectively at Stns. 1, 2 & 3. Contribution of dinoflagellates was about three times high at Stn 1 as compared to Stns 2 & 3. Significant difference was not observed in the quantitative indices between the stations. Attempts have been made to evaluate the interrelationship between various parameters and the role of salinity and mixing on phytoplankton biomass and diversity.
Title :  Biomass, horizontal zonation and vertical stratification of polychaete fauna in the littoral sediment of Cochin estuarine mangrove habitat, south west coast of India.
Subject :  Biomass, horizontal zonation and vertical stratification of polychaete fauna in the littoral sediment of Cochin estuarine mangrove habitat, south west coast of India.
Volume No. :  31
Issue No. :  2
Author :  Sunil Kumar, R.,
Printed Year :  2002
No of Pages  :  100-107
Description : Biomass distribution, horizontal zonation, relative dominance and vertical distribution of polychaetes were studied. Highest biomass was recorded in the mid tidal region in both study areas. The monthly values varied from 4.43 to 128.28 g.m-2 at st 1 and 2.57 to 67.31 g.m-2 at st 2. Multiple regression analysis between biomass and environmental parameters indicate that they could not individually or in combination bring about the spatial and temporal variability in biomass distribution. Moreover, at st 1 edaphic factors appear to be responsible for partial variation in biomass indicating comparatively high F ratio for variance analysis than station 2. ANOVA of species diversity indices values (P<0.5) between the three tidal regions showed a clear horizontal zonation of polychaetes, especially at st 1. A substantial difference in percentage composition of fauna, up to 15 cm depth of mangrove soil, was found in all the three tidal zones studied. This variability in the community structure in the top (0-5 cm) and deeper mangrove sediment (10-15 cm) is pertained to a variety of characteristic features of both upper and deeper sediments. High numerical abundance and coexistence of certain euryhaline species showed significant similarity index (>70%) among polycheate fauna. This similarity and affinity of fauna for a long period evidently indicate the habitat stability that is pertained to the existence of species diversity and abundance. This is related to the prolonged food resource input and profound standing capacity in the littoral mangrove soil, which virtually render in building up a stable community structure of polychaetes. As a result of this, selection of habitat by polychaetes, its survival and subsequent long-term biomass production were occurred. The strong similarity of polychaete fauna between months and biomass productivity can be considered for deriving the productive characteristic of the mangrove habitat, and also for assessing demersal fishery potential.
Title :  Bivalve resources of the Chettuva estuary, Kerala
Subject :  Bivalve resources of the Chettuva estuary, Kerala
Volume No. :  53
Issue No. :  4
Author :  Laxmilatha, P., Velayudhan, T.S., Mohamed, K.S., Kripa, V., Radhakrishnan, P., Mathew Joseph and Jenny Sharma
Printed Year :  2006
No of Pages  :  481-486
Description : Clams form a major exploited resource of Chettuva estuary. A rapid survey was carried out to assess the bivalve resource and potential stock. The estuary harbors an estimated standing stock of 378 t of bivalves; Meretrix casta is the dominant species (340 t) followed by Villorita cyprinoides (33.6 t). Aspects of conservation and management of bivalve fishery are detailed. The prospects for enhancing bivalve production from the estuary through relaying/ semi culture clams and promoting mussel farming in the lower reaches of the estuary are discussed.
Title :  Bottom animal communities in some estuaries of India
Subject :  Bottom animal communities in some estuaries of India
Volume No. : 1
Issue No. : 1
Author :  Qasim, S.Z.,
Printed Year : 
No of Pages  :  70-77
Description : Bottom faunal communities of the estuaries of the west coast of India are relatively better studied than those of the east coast. The Ashtamudy Estuary of Kerala has a poor fauna. Polychaetes and bivalves predominantly form the larger faunal group. Among the 14 taxa of polychaetes, 6 species are the most common. Molluscs from the next largest group. Cochin Backwaters have a much richer fauna in the marine sector declining towards the regions diluted with freshwater. Meiofauna included a high abundance of foraminiferans and nematodes. Larger animals include polychaetes, amphipods, prawns, bivalves, gastropods, etc. Thick growth of the weed, African Payal, Salvinia sp. during the monsoon months greatly restricts the faunal distribution. Polychaetes are abundant in polluted regions of the estuary. Mass deposits of lime-shell clam-about 5 metre thick at the bottom are commercially exploited from Vembanad Lake for the production of white cement. At one time about 50,000 tonnes of lime-shell were taken out from the lake. Benthic fauna of the Kali Estuary of Karnataka includes fair representatives of molluscs and crustanceans during the season when salinity is high. Clams contribute to about 65 per cent of the total benthic biomass. In Goa, the Mondavi-Zuari Estuarine Complex provides rich faunal groups consisting of bivalves and there is a regular fishery of the clam-Meretrix casta and Perna viridis in Goa. They are also regularly hand-picked largely by womenfolk at low tides. In the Zuari, polychaetes are abundant. There has been a regular decline of clam fishery in both the Goa estuaries because of siltation caused by mining activity. Fewer studies have been conducted on the benthic fauna of the estuaries of the east coast of India. During one of the cruises of RV Gaveshani, grab samples collected from 4 estuaries � Godavari, Krishna, Mahanadi and Hooghly-contained polychaetes and bivalves as macrofauna and a fairly large assemblage of meiofauna with nematodes as the most dominant group. In the Vellar Estuary of Tamil Nadu, which is fairly is fairly well-studied, forty seven species belonging to eight groups have been identified. Several bivalve species are exploited as food. Among these the bivalves are exploited commercially. Meiofauna is also poorly represented.
Title :  Cellulolytic bacteria in Marine wood borers.
Subject :  Cellulolytic bacteria in Marine wood borers.
Volume No. :  38
Issue No. :  1
Author :  Dhevendaran, K., Rajashree. R.V. and Balakrishnan Nair, N.
Printed Year :  2001
No of Pages  :  31-35
Description : Four wood borers (Sphaeroma terebrans, S. annandalei, Martesia striata and Teredo furcifera) were collected from four stations (Akathumuri, Edava Nadayara, Neendakara and Ashtamudi) of Kerala coast. The cellulolytic bacterial population in S. terebrans during different seasons were investigated. Maximum population was recorded during monsoon season in the hind gut region. Samples from Ashtamudi and Akathumuri recorded the maximum cellulolytic bacteria in S. terebrans. Similarly a survey of the cellulolytic bacteria in different wood-borers collected from Ashtamudi revealed that M. striata harboured the maximum cellulolytic bacteria and S. annandalei showed the minimum population. Bacterial isolates randomly selected, exhibited maximum cellulolytic activity of 350 �g glu.ml-1h-1 in Micrococcus (AQB Th3) isolated from S. terebrans and minimum, 37 �g glu.ml-1h-1 in Corynebacterium (AQB Th2) isolated from S. annandalei. The enzyme activity in the mouth and viscera of wood borers was investigated. It was noted that maximum cellulolytic activity was in mouth region though not low in the visceral region.
Title :  Chlorophyll-a and phaeopigments of brackishwater ponds along Nethravathi Estuary, Mangalore
Subject :  Chlorophyll-a and phaeopigments of brackishwater ponds along Nethravathi Estuary, Mangalore
Volume No. :  33
Issue No. :  2
Author :  Rajesh, K.M., Gowda, G., and Mridula R. Menon
Printed Year : 
No of Pages  :  6-11
Description : The Chlorophyll-a values were observed in semi enclosed and enclosed brackishwater ponds, with relatively higher mean concentration in case of the former. Higher values were recorded during monsoon followed by pre-monsoon and post-monsoon seasons. The mangrove areas were found to have more chlorophyll-a than the non mangrove areas. An inverse relationship was observed between chlorophyll-a and phaeopigments.