Hatha, A A M; Vivekanandhan, G; Savithamani, K; Lakshmanaperumalsamy, P(Elsevier, November 27, 2001)
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Abstract:
A total of 319 strains of Aeromonas hydrophila were isolated from 536 fish and 278 prawns for a 2-year period. All the
strains were tested for resistance to 15 antibiotics and 100% of the strains was resistant to methicillin and rifampicin followed by
bacitracin and novobiocin (99%). Only 3% of the strains exhibited resistance against chloramphenicol. The multiple antibiotic
resistance (MAR) indexing of A. hydrophila strains showed that all of them originated from high-risk sources
Description:
International Journal of Food Microbiology 76 (2002) 165– 168
Sheeba, Susan Mathews; Dr.Gopinatha Menon, N(Cochin University of Science and Technology, January , 1992)
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Abstract:
Prawn culture by traditional method forms an important occupation for the people in these areas, especially in the Vypeen island. Though short term studies have been made on various aspects of prawn culture field and its ecology, a study of detailed nature covering perennial, seasonal, fields and canals between coconut plantation is lacking from these areas. This study will also enable to assess the relative productivity of different systems during different seasons and the influence of the environment on the production potentials. Therefore the present study is taken upto throw more light on the ecological characteristics of these fields with special emphasis on its primary, secondary and tertiary production. The present area of investigation includes the prawn culture fields adjacent to Cochin backwater. The Cochin backwater (O9° 58'N 76° 28'E) is a shallow semi-enclosed body of water of tropical estuary. A narrow gut, about 450 M wide forms its main connection with the Arabian sea and this region is subjected to regular tidal influenceertiary production.
Hatha, A A M; Vivekanandhan, G; Lakshmanaperumalsamy, P(Elsevier, January 26, 2004)
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Abstract:
Five hundred and thirty six samples offishes and 278 prawn samples from the major fish market ofCoimbatore, South India,
were analysed for the prevalence of Aeromonas hydrophila over a period of2 years (June 1997–May 1999). The prevalence level of A.
hydrophila varied from 17.62% in prawns to 33.58% in fishes. More than 30% of the popular table fishes such as Sardinella
longiceps, Rastrelliger kanagurta, Mugil cephalus and Caranx sexfasciatus were tested positive for this organism. Among the
different species of the prawns analysed, Penaeus semisulcatus showed higher incidence (23.52%). Seasonal variation in the
prevalence levels of A. hydrophila in fish and prawns revealed a higher prevalence during the monsoon season during 1997–98 and
1998–99. Of the different body parts of the fishes analysed for A. hydrophila, the intestinal samples showed higher prevalence
(38.43%), followed by body surface (32.46%) and gill (29.10%). Considering the psychrotrophic nature and role of A. hydrophila as
a pathogen ofemerging importance, the considerably high levels ofthis organism in a popular food item such as fish and prawn
raises serious concern
Gopakumar, G; Dr.Kuttyamma, V J(Cochin University of Science and Technology, June 6, 1991)
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Abstract:
The work presented in this thesis is centered mainly around delineating the toxic effect of hydrogen sulphide on penaeid prawns and understand its influence on the ecology of estuary. The present investigation also involved characterization of the effects of hydrogen sulphide on the growth and behavioural responses of Penaeus indicus. The test animals employed during the present study namely indicus and Metapenaeus dobsoni are both ecologically and economically relevant. The thesis embodying the details of the investigation has been organized into three chapters comprising Acute toxicity, influence of hydrogen sulphide on the ecology of estuary and effect of hydrogen sulphide on growth and substratum selectivity of penaeid prawn. Each chapter has been partioned into various sections as Introduction, Material and Methods, Results and Discussion for a lucid presentation of the subject matter.
Description:
Division of Marine Biology
Microbiology and Biochemistry, School of Marine Science,
Cochin University of Science
and Technology
Chandrasekaran, M; Dr.Lakshmanaperumalsamy, P; Dr.Chandramohan, D(Cochin University of Science and Technology, April , 1985)
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Abstract:
The aim of the present investigation is to build up the knowledge on the role of commensal bacteria present on the prawns during storage at various temperatures. The study Evaluates the nature of spoilage of prawns during storage at three different temperatures (28:2OC, 4°C and -18°C) by organoleptic assessment, accumulation of trim ethylamine, ammonia content, changes in the flesh pH and total heterotrophic bacterial population at various time intervals and to find out the changes in the proximate composition (protein, carbohydrate, lipid, ash and moisture) of the prawns during storage at various temperatures by estimating the contents at different time intervals along with spoilage assessment. The researcher studies the occurrence and role of various bacterial genera which form the component of spoilage flora during storage and determines the distribution of various hydrolytic enzyme producing bacteria by evaluating their ability to produce enzymes such as caseinase, gelatinase, amylase, lipase and urease. to assess the spoilage potential of the bacteria by testing their ability to reduce trimethylamine oxide (TMAO) to trimethylamine (TMA) and to produce odour in flesh broth and halos in flesh agar media.The researcher also gives stress on the growth kinetics of selected potential spoilers by growing_them in different media and to assess the effect of sodium chloride concentrations, temperature and pH on their growth, survival and. generation time.
Description:
School of Marine Sciences, Division of marine biology, microbiology and biochemistry, Cochin University of Science and Technology
Sivachandrabose, K; Dr.Suseelan, C(Cochin University of Science and Technology, October 10, 1995)
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Abstract:
A study of the reproductive physiology of P. (P). semisulcatus wasundertaken as this information is an essential prerequisite for brood stock development for hatchery operations, and the results are embodied in this thesis. The thesis is presented in seven chapters. The protein, lipid and carbohydrate contents of ovary were estimated for the different vitellogenic phases. The protein, lipid, carbohydrate and cholesterol contents were estimated in testes and spermatophore.The thesis present the results of induced maturation experiments by eyestalk ablation, CNS extract injection and UV rays application on immature female prawns.