Seshagiri Bandla

Central Institute of Freshwater Aquaculture | CIFA · aquaculture production

Most of the drowning cases in India are suicidal although accidental, homicidal and post-mortem immersion are not uncommon. Death in water occurs under the stress imposed by asphyxia. It is very important to diagnose right cause of death as this is having great importance in the subsequent medico-legal proceedings

Aquaculture operations in Andhra Pradesh which have hampered during first phase of COVID-19 continued in pandemic second wave due to manpower shortage, closure of domestic markets, restricted interstate transportation, collapsing market prices, change in consumer preference and disrupted exports. This has led to sluggishness in domestic markets res...

भारत देश में मत्स्य पालन क्षेत्र ने फसल और पशुधन क्षेत्रों की तुलना में उच्च वि कास दर दर्ज कि या है और इसके साथ देश की आर्थिक रूप से कमजोर आबादी के एक बड़े वर्ग की आजीवि का में भी योगदान देता आ रहा है। हमारे देश का मत्स्य उत्पादन, 1991-92 मे 41.57 लाख टन (समुद्री के क्षेत्र से 24.47 लाख टन और अंतर्देशीय क्षेत्र से 17.10 लाख टन) से बढ़कर 2019- 20 म...

Marginal weeds like Typha angustata Chaub, Cyperus corymbosus Rottb and Paspalidium geminatum Staff are of common occurrence in ponds causing considerable damage to aqua-farming. The eradication by manual means is usually expensive requiring repeated operation due to quick regeneration. Among the herbicides tested for their eradication, glyphosate...

The domestic waste water treatment process utilizing water hyacinth has a promising potential. The secondary sewage from the oxidation pond was passed through a hyacinth basin to a 0.02 ha fish culture pond. On a year round basis, the BOD, DOM, P2O5, NH4-N and NO3-N in water were reduced by 56.6, 52.3, 29.1, 24.3 and 43.8% respectively on entry int...

General protein synthesis in Cyclotela meneghiniana f. unipunctata was inhibited by quinine at concentrations ranging from 1 to 5mM and resulted in mitotic delay of 1.5 to 60h subsequent to chemical treatment. Chemical effect was not consistent since it could be alleviated by additional magnesium in the medium at levels varying from 1 to 10mM. Howe...

Methyloxypurine alkaloids viz., Caffeine, Theobromine and Theophylline inhibited cytokinesis in Cyclotella meneghiniana Kuetz. f. unipunctata A. Cl. and led to the formation of binucleate cells. Caffeine is a potent inhibitor of cell plate formation followed by theophylline and theobromine. Effect of alkaloids up to 3mM was successfully reverted by...

Optimum requirement of four macronutrients namely calcium, magnesium, sodium and potassium for maximum growth and division rates of Cyclotella striata and Nitzschia palea has been studied. Elemental concentration required for maximum growth of the taxa differed from source to source. Role of calcium and magnesium in cell division and importance of...

Requirement of four micronutrients, copper, zinc, manganese and iron for optimum growth of two fresh water diatoms, Cyclotella striata and Nitzschia palea was studied; 0.06 mg Cu, 0.15 mg Zn, 1.5 mg Mn and 3.0 mg Fe were found suitable for the optimum growth. Role of these micronutrients in the growth of diatoms was discussed.

Effect of inorganic and organo lead has been studied on the mitosis of a centric diatom Cyclotella meneghiniana f. unipunctata. Binucleate cells were formed in the presence of different concentrations of Pb2+ (1, 2, 3 and 5 mM) due to inhibition of cell plate formation. Lead at 5.0 mM concentration was inhibitorier than the other concentrations. Or...

Growth response of two diatom taxa, Cyclotella striata and Nitzschia palea was studied in different levels and sources of three macronutrients, silica, sulphur and carbonate ions. Optimum requirements for maximum growth of both the taxa was same in case of silica while it differed in case of sulphur and inorganic carbonate.

Three taxa namely, Synedra miniscula, Synedra ulna and Synedra ulna f. stauro-destituta were isolated and grown in Chu-10 medium (5) supplemented with D-7 micronutrient solution. Exponentially growing algae were fixed in 1:3 acetic acid-ethanol mixture at intervals of 15 minutes during light and dark phase. Completely decolourized materials were st...

Rauvolphia alkaloid, reserpine induced distortion in nuclear morphology and the migration of nucleus to peripheral layer of cytoplasm. Nucleus in 6-80% of the cells was affected at various concentrations of the alkaloid ranging from 1 to 10mM. Nutrient medium with additional phosphorus could revert the effect of reserpine up to 3mM while the effect...

Migration of daughter nuclei to the respective poles was inhibited by nicotine. Cytokinesis proceeded normally but cell plate was formed outside the two nuclei resulting in an enucleate cell and a binucleate cell. Mg2+ at a concentration of 2.5 to 10 mM could suppress the effect of nicotine up to 3 mM. Irreversible cellular damage was caused by hig...

Freshwater aquaculture in India has evolved into a promising activity in recent years with emphasis on improving productivity through application of organic inputs. Agrobased bye products are utilized in aquaculture as manures and or as feeds for sustaining the photosynthesis and heterotrophic food chain mechanisms. Reduction in organic loads, inpo...

Role of women in aquaculture although has for long been predominant, it is limited to physical operations than planning and management. In commercial hatcheries, women are involved in brood fish selection and transfers, weighing of brood fish, egg collection, spawn lifting and seed packing, while grow-out farms involve women in stocking fingerlings...

Ancillary activities for the sustainability of freshwater aquaculture

Aquaculture in Andhra Pradesh is mostly based on drain and wastewaters. Although there has been no separate allocation of waters by the government for aquaculture, no incidents of clashes between agri- and aqua-farmers were observed. At the same time symbiosis is observed on water usage between aqua- and agri-sectors.

Agriculture had been found to be the primary user of irrigation waters in the delta. Economic returns from unit production of paddy and fish utilizing I cum to water volume show 300% higher returns from aquaculture simultaneously harnessing 6 times nitrogen from the system than paddy indicating efficient mineralization. Strategies for stock enhance...

Absence of either silica or manganese resulted in formation of biprotoplastic cells due to inhibition of silification of cell wall in Cyclotella meneghiniana f. unipunctata. Deficiency of silica and manganese induced 30% and 10% biprotoplastic cells respectively in the medium. Direct correlation between silica and wall formation was recorded. Manga...

Microscopic observation of the stained cells revealed 32% binucleate cells in the medium, completely lacking calcium and thereafter frequency of binucleate cells decreased linearly with increase in Ca2+ concentration. Similarly, 10% binucleate cells were observed in boron deficient medium. Binucleate cells decreased with increase in boron level up...

Burgeoning population growth, increasing affluence, and changing dietary habits of people have caused a phenomenal rise in fish demand over the years in India. Diversification of aquaculture species aimed at increasing yield and providing a wider choice of fish protein to the consumers has led to the introduction of several more affordable species...

In spite of vast diverse fish genetic resource of India, several exotic species have been introduced into India. Chinese carps which were introduced in India with an objective of increasing the yields in aquaculture has paved way for composite fish culture in India. Introduction of exotic species for fisheries and aquaculture was successful in some...

The present study was designed to demonstrate the seasonal variations in physico-chemical parameters in sh ponds and carried out for one year at monthly intervals in ten sh ponds. Maximum value of Gross Primary Production (GPP) and Net Primary Production (NPP) is observed during pre-monsoon and subsequently the lower values during monsoon season...

Suckermouth armoured catfish (Pterygoplichthys spp.) which is popularly called "Devil fish" in Andhra Pradesh, was recorded in 93.33% of fish ponds out of 600 ha surveyed in Krishna and West Godavari districts including mesohaline ponds wherein salinity ranges from 2 to 20‰. Pterygoplichthys spp. have ranged from 150 to 600 kg/ha that accounts to 2...

In spite of vast diverse fish genetic resource of India, several exotic species have been introduced into India. Chinese carps which were introduced in India with an objective of increasing the yields in aquaculture has paved way for composite fish culture in India. Introduction of exotic species for fisheries and aquaculture was successful in some...

In spite of vast diverse fish genetic resource of India, several exotic species have been introduced into India. Chinese carps which were introduced in India with an objective of increasing the yields in aquaculture has paved way for composite fish culture in India. Introduction of exotic species for fisheries and aquaculture was successful in some...

Abstract In spite of vast diverse fish genetic resource of India, several exotic species have been introduced into India. Chinese carps which were introduced in India with an objective of increasing the yields in aquaculture has paved way for composite fish culture in India. Introduction of exotic species for fisheries and aquaculture was successf...

India is the second largest fish producing country in the world, but our per capita fish consumption is less than the global average. Blessed with abundant water resources across the country, we are yet to exploit the full potential of the available resources. As the marine production is almost stagnant, the additional fish production has to be sou...

Aquaculture has been recognized as instrumental in generating income and rural employment besides stimulating growth of a number of ancillary industries. It has increased manifold in Andhra Pradesh in recent times in comparison to agriculture as it brings more profit and requiring less labour per unit area. Outbreak of coronavirus has not only disr...

Pollution in freshwater ecosystems leads to the eutrophication, which results in high phytoplankton biomass, structural losses to aquatic habitats, low oxygen availability and at times logged toxic waters. Altogether nine freshwater fishponds were taken for the study, which are located at Krishna-Godavari delta. The main aim of this study is to und...

Innovative trends like stocking stunted yearlings has resulted in higher production levels while introducing zero point seed for culture has reduced cropping season significantly leading to yielding of two crops annually in Andhra Pradesh. Although, fish culture trends in Punjab and Haryana follow Andhra Pradesh but for short culture period and poo...

Kolleru lake ecological conservation and fish farming can co-exist with the authorities conditionally approving Fish farming, aiming at the implementation of valid measures to conserve lake physiology, water quality, aquatic and avian biodiversity. Without the active cooperation of the local fisher communities, all the efforts at conserving will be...

Executive Summary The present project model entitled “Technical Feasibility and Economic viability Studies of Fresh water Fish Processing Enterprise” is for establishing a unit to process freshwater carps and catfishes and to produce value added deboned, convenient ready-to-eat and ready-to-cook freshwater fish products. The products are generally...

Growth performance and breeding efficiency of Jayanti Rohu and local Rohu was studied under similar field conditions was studied in Andhra Pradesh. Jayanti Rohu has grown 28% higher than the local Rohu (Labeo rohita). Fecundity in Jayanti Rohu was found to be 22.7% higher than local rohu. Size of fertilized eggs were small in jayanti Rohu (3.93 mm)...

Although, phenanthrene alkaloids, viz., codeine and morphine are active compounds of pharmacological significance in many adrenergic reactions, they can be cytotoxic and respiratory depressants to the dividing cells 1. However, their action one cell cycle remains poorly understood. Present communication describes the action of these two alkaloids o...

Examination by the diatom test, of different organs of corpses of individuals who died of drowning revealed the presence of frustules in all the visceral organs. Diatom load of different organs was found to be positively related with breadth/diameter of the frustule. Relatively larger diatoms were encountered in the lungs, heart and kidneys as comp...

Apart from normal cell division, unequal cytokinetic divisions leading to formation of enucleate cells also occur in Cyclotella meneghiniana f. unipunctata. Migration of daughter nuclei and cell-plate formation seem to be independent mechanisms. Silica deposition on the walls of enucleate cells indicates neither complete cytokinesis nor mitosis are...

Karyology of thirteen taxa belonging to four genera, Pinnularia, Gyrosigma, Navicula and Gomphonema, was studied. Chromosome numbers determined for different taxa ranged from 2n=6 to 2n=64. Chromosomes were mostly dot-like or rod-like and varied from 0.25 to 1.7 μm in size. Metaphase organisation of chromosomes was found to be either plate or ring....

Nitrogen and phosphorus requirement of two diatom taxa, Cyclotella striata and Nitzschia palea investigated. Nitrogen at a concentration of 18.8 mg.l-1 yielded optimum growth in two taxa. Phosphorus requirement in two taxa differed from each other (8.8 mg.l-1 for Cyclotella striata and 11.1 mg.l-1 for Nitzschia palea. Nitrogen was preferred in the...

Growth response and division rates of two diatom taxa Cycolotella striata and Nizschia palea to pH, temperature, light intensity and light / dark cycles were studied. Optimum division rates in both the taxa were obtained at pH 8.0, 25 degrees Celsius temperature, 2.5 Klux light intensity and 16/8 hr light / dark cycle.

Migration of daughter nuclei to respective poles was affected in dividing cells of Cyclotella meneghiniana f. unipunctata due to magnesium deficiency. Inhibition of nuclear migration but normal completion of cytokinesis outside the daughter nuclei resulted in the formation of anucleates cells in the medium. Magnesium seemed to play important role i...

General pattern of the process of mitotic division was studied in thirty seven pennate diatoms. Even though normal mitotic division takes place in diatoms it resembles with that of animal cell division in having ring-like arrangement of metaphase chromosomes and cell furrow cleavage of cytoplasm. Most of the diatoms follow Mac Donald—Pfitzers hypot...

Four freshwater centric diatom taxa, Cyclotella glomerata, C. striata, C. meneghiniana f. unipunctata and C. catenata were investigated karyologically and their important karyological features have been described and discussed. First two taxa contained same chromosome number 2n=12 while C. meneghiniana f. unipunctata and C. catenata revealed 2n=18...

Karyological studies on members of Bacillariophyceae are very meagre. Even though this group is represented by hundreds of species, chromosome numbers are available for nine taxa only (11, 12, 17, 21, 22). The reasons for slow progress in karyology of diatoms may be due to difficulty in getting division figures, difficulty in making proper cytologi...

Forty diatom taxa (Table-1) belonging to twelve genera i.e., Cyclotella, Synedra,