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Commonisation and decommonisation: Understanding the processes of change in the Chilika Lagoon, India  [cached]
Nayak Prateep,Berkes Fikret
Conservation & Society , 2011,
Abstract: This article examines the processes of change in a large lagoon system, and its implications for how commons can be managed as commons in the long run. We use two related concepts in our analysis of change: commonisation and decommonisation; ′commonisation′ is understood as a process through which a resource gets converted into a jointly used resource under commons institutions that deal with excludability and subtractability, and ′decommonisation′ refers to a process through which a jointly used resource under commons institutions loses these essential characteristics. We analyse various contributing issues and dynamics associated with the processes of commonisation and decommonisation. We consider evidence collected through household and village level surveys, combined with a host of qualitative and quantitative research methods in the Chilika Lagoon, the largest lagoon in India, and one of the largest lagoons in Asia. We suggest that in order to keep the Chilika commons as commons will require, as a starting point, a policy environment in which legal rights and customary livelihoods are respected. With international prawn markets stabilised and the ′pink gold rush′ over, the timing may be good for a policy change in order to create a political space for negotiation and to reverse the processes causing decommonisation. Fishers need to be empowered to re-connect to their environment and re-invent traditions of stewardship, without which there will be no resources left to fight over.
Study of Macrobenthos in Relation to Eutrophication at Chilika Lagoon, East Coast of India
Marine Science , 2012, DOI: 10.5923/j.ms.20120206.05
Abstract: In order to find out hydrographical parameters influences over macrobenthic density and diversity, fifteen stations were sampled in Chilika lagoon. They were grouped into macrophytes dominated areas from Station 1 to Station 10 (St1 to St10) and Phragmites karka dominated areas from Station 11 to Station 15 (St 11 to St 15).The value of Pearson’s correlation matrix in the macrobenthic density was found to be positive significant relationship with transparency (r=0.548, p<0.05), depth (r=0.8006, p<0.01) and pH (r=0.72, p<0.01). Whereas macrobenthic biomass was significant positive relationship with transparency (r=0.656, p<0.01), depth (r=0.8006, p<0.01), pH (r=0.516, p<0.05) and dissolved oxygen (r=0.671, p<0.01). The diversity index values were found highest in between St1 to St10 and decreased sharply in between St11 to St15. The Non-metric Multidimensional Scaling (NMDS) resulted three clusters of stations in the study area which were characterized as live macrophyte, live and dead macrophyte and Phargmites karka in Cluster I, Cluster II and Cluster III respectively. Progressive decreasing trend was observed in macrobentic density and diversity with the hydrographical parameters of depth, transparency and dissolved oxygen from cluster I to Cluster III. The total numbers and biomass of wet weight of macrobenthic were observed 26075 no m-2 (1738 ± 3341) and 277 gm m-2 (18.47±38.83) in the sampling stations. Bivalves followed by Polychaets were dominated in the first group of stations where as Polychaet and Chronomid was dominated in the second group of stations.
Influence of Monsoon on Macrobenthic Assemblage in Outer Channel Area of Chilika Lagoon, East Coast of India  [PDF]
Debasish Mahapatro,R.C. Panigrahy,Sudarsan Panda,Rajani K. Mishra
Journal of Wetlands Ecology , 2009, DOI: 10.3126/jowe.v3i0.2223
Abstract: Abundance of macrobenthos in the outer channel area of Chilika lagoon in the east coast of India was studied during Monsoon season of 2007 & 2008. In total 27 species of macrobenthic organisms were collected during the study period season. Crustacea was emerged as the most dominate group representing 9 species followed by polychaetes with 8 species while 5 species belonged to bivalvia and 3 species to gastropoda. The others group in the study area included nematodes and echiurids. The mean density of macrobenthos was 378 organism m -2 and 392 organism m -2 in 2007 & 2008.The biomass was measured as and biomass 0.525 g m -2 and 0.575 g m -2 during 2008 &2007. Mean values of diversity indices like Margalef's richness index was 2.7 in 2007 and 3.0 in 2008. While Shannon's H' was 1.7 of 2008 and 1.8 in 2007. The Evenness J was calculated as 0.76 in 2008 and 0.94 in 2007. The result of the study shows that hydrographical parameters like Temperature (°C), pH and Salinity (psu) parameters had modest relationship with population density and biomass. The preference of macrobenthic organism to any specific parameter couldn't be established clearly and this would be due to the presence of more opportunistic filters feeders than the deposit feeders. The opening of a new outlet connecting with the sea had good influence on species richness and population density. Key words: Chilika lagoon; Macrobenthos; Population density; biomass; diversity indices DOI: 10.3126/jowe.v3i0.2223 Journal of Wetlands Ecology , (2009) Vol. 3, pp 56-67
Isolation and Identification of Pathogenic Bacteria from Brackish Waters of Chilika Lagoon, Odisha, India for Pharmaceutical Use
Subhashree Parida,Ram Chandra Jena,Kailash Chandra Samal,Pradeep Kumar Chand
Malaysian Journal of Microbiology , 2012,
Abstract: Aims: The present investigation was undertaken in order to isolate bacteria from eighteen different water samples collected from three different sectors of ‘Chilika’ lagoon of India and to study the resistance against ten different antibiotics viz., norfloxacin, tetracycline, ciprofloxacin, neomycin, nalidixic acid, ofloxacin, chloramphenicol, nitrofurantoin, streptomycin and amoxicillin as well as their serological implications.Methodology and Results: Four different pathogenic bacteria species viz., Shigella dysenteriae, Streptococcus lactis, Bacillus cereus and Klebsiella pneumoniae were isolated which showed a wide range of sensitivity to norfloxacin,tetracycline, ciprofloxacin, ofloxacin and nitrofurantoin. S. dysenteriae was sensitive to streptomycin where as other isolates were found to be resistant. Agarose gel electrophoresis failed to reveal plasmid DNA band indicating that theobserved resistance was perhaps encoded by nucleotide sequences harboured on the chromosomal DNA. Bacterial isolates were used as antigen for the production of polyclonal antibodies in rabbits.Conclusion, significance and impact of study:All the isolates exhibited strong antigenic character with specific serological relationship which can be implicated towards development of novel and pharmaceutically effective antibacterial products.
Molluscan Wood-Borers of Chilika Lagoon, East Coast of India and Their Control Measures  [cached]
Lakshman Nayak,Durga Prasad Behera,Simanchala Das
Current Research Journal of Biological Sciences , 2012,
Abstract: The aim of the present study is to know the occurrence and distribution of molluscan wood-borers from Chilika lagoon in relation to some physico-chemical parameters .The samples were collected from three stations during May 2010 to April 2011. Six wood-borers belonging to Family Pholadidae and Teredinidae namely Martesia striata and five borers, namely, Bankia brevis (Deshayes), Bankia campanellata (Moll and Roch), Bankia sps., Lyrodus pedicellatus (Quatrefages) and Teredo furcifera were observed. The physicochemical parameters like air temperature , surface water temperature , pH, salinity, and dissolved oxygen were studied from these stations. The air temperature varied 28.5 to 35.4oC. The surface water temperature was lowest being 27.5oC in post-monsoon at station-3 and the highest surface water temperature was 32.8oC during pre-monsoon at station -1. The highest and lowest pH was observed to be 8.9 during monsoon in station- 1 and 7.5 during post-monsoon in station -1. Similarly the highest and lowest value of salinity was observed to be 19.5% at station - 3 during pre-monsoon and 14.26% at station-2 during monsoon. Likewise the highest and lowest dissolved oxygen were observed to be 11.5 mL/L during pre-monsoon at station -1 and monsoon at station-2.
Eternal Bengal Eternal Bengal  [cached]
Ranabir Samaddar
Scienza & Politica : per una Storia delle Dottrine , 2011, DOI: 10.6092/issn.1825-9618/2715
Abstract: Eternal Bengal
Sand bar opening in a coastal lagoon (Iquipari) in the northern region of Rio de Janeiro State: hydrological and hydrochemical changes
SUZUKI, M. S.;FIGUEIREDO, R. O.;CASTRO, S. C.;SILVA, C. F.;PEREIRA, E. A.;SILVA, J. A.;ARAGON, G. T.;
Brazilian Journal of Biology , 2002, DOI: 10.1590/S1519-69842002000100007
Abstract: the aim of this paper was to verify hydrological and hydrochemical changes in the iquiparí lagoon water column, during three months, as related to an artificial sand bar opening. a drastic reduction in water volume occurred 28 hours after the sand bar opening, exposing the bottom sediment. this was densely colonized by submerged aquatic plants, which were dominant in the ecosystem metabolism, specially near the sand bar. an increase in salinity values, and dissolved and total nutrient concentrations, was observed during the sand bar opening period. in contrast, chlorophyll a concentration decreased. these changes were associated with: 1) mix of remained brackish and marine waters; 2) nutrient release from sediments by physical processes; and 3) submerged plant death. after the sand bar closure, lagoon metabolism was completely regulated by a dense phytoplankton community. we observed that the sand bar opening resulted in an extensile replacement of the lagoon's water and a change in the community mainly responsible for the ecosystem metabolism.
Sand bar opening in a coastal lagoon (Iquipari) in the northern region of Rio de Janeiro State: hydrological and hydrochemical changes  [cached]
SUZUKI M. S.,FIGUEIREDO R. O.,CASTRO S. C.,SILVA C. F.
Brazilian Journal of Biology , 2002,
Abstract: The aim of this paper was to verify hydrological and hydrochemical changes in the Iquiparí Lagoon water column, during three months, as related to an artificial sand bar opening. A drastic reduction in water volume occurred 28 hours after the sand bar opening, exposing the bottom sediment. This was densely colonized by submerged aquatic plants, which were dominant in the ecosystem metabolism, specially near the sand bar. An increase in salinity values, and dissolved and total nutrient concentrations, was observed during the sand bar opening period. In contrast, chlorophyll a concentration decreased. These changes were associated with: 1) mix of remained brackish and marine waters; 2) nutrient release from sediments by physical processes; and 3) submerged plant death. After the sand bar closure, lagoon metabolism was completely regulated by a dense phytoplankton community. We observed that the sand bar opening resulted in an extensile replacement of the lagoon's water and a change in the community mainly responsible for the ecosystem metabolism.
Flushing time in Perlas Lagoon and Bluefields Bay, Nicaragua
Brenes,Carlos L; Hernández,Aldo; Ballestero,Daniel;
Investigaciones marinas , 2007, DOI: 10.4067/S0717-71782007000100008
Abstract: the flushing time of perlas lagoon and bluefields bay were studied in january, march, may, and july 2001. calculations of the total water volume, tidal prism, mean salinity, and fresh water flows are shown. the flushing times range from 14 to 17 days for perlas lagoon and from 2 to 4 days for bluefields bay. flushing time variability, determined largely by the fresh water contribution, is greater for bluefields bay, duplicating its magnitude during the dry months compared to the rainy season. in both bodies of water, the relationship between fresh water input and flushing time is inverse: for bluefields bay t = 5.2·e-0.0008 (fw), where r2 = 0.835 and for perlas lagoon t= 20.2·e-0.0004 (fw), where r2= 0.873
New Records of Two Asteroids Calliaster childreni Gray, 1840 and Pentaceraster horridus (Gray, 1840) from the Bay of Bengal
M. Karuppaiyan,K. Raja
International Journal of Zoological Research , 2007,
Abstract: This research describes two new records of the Asteroidea Calliaster childerni Gray, 1840 and Pentaceraster horridus Gray, 1840, from the Bay of Bengal. A detailed description of the little known species of given in to photographs.
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