Rishikesh S. Dalvi

Rishikesh S. Dalvi
Maharshi Dayanand College | MD College · Department of Zoology

MSc, PhD (Zoology)

About

45
Publications
6,519
Reads
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892
Citations
Introduction
Rishikesh S. Dalvi currently works at the Department of Zoology, Maharshi Dayanand College. Rishikesh does research in Animal Science, Immunology and Physiology. Their most recent publication is 'Metabolic and cellular stress responses of catfish, Horabagrus brachysoma (Günther) acclimated to increasing temperatures'.
Additional affiliations
December 2011 - present
Maharshi Dayanand College
Position
  • Professor (Assistant)
December 2011 - present
Maharshi Dayanand College
Position
  • Professor (Assistant)
February 2010 - December 2011
Central Institute of Fisheries Education
Position
  • Senior Researcher
Education
December 2003 - October 2007
University of Mumbai
Field of study
  • Zoology (Fish Physiology)
June 1999 - October 2001
University of Mumbai
Field of study
  • Zoology (Ocenography and Fisheries)
May 1995 - June 1998
University of Mumbai
Field of study
  • Zoology (Marine Science)

Publications

Publications (45)
Article
Full-text available
Understanding changes in biometric indices and metabolism in fish exposed to feed deprivation may be useful in aquaculture. The present study elucidates the effect of feed deprivation on physio-biochemical responses, such as changes in biometric indices, nutrient mobilization patterns, and enzyme activities in rohu (Labeo rohita). Experimental fish...
Article
We investigated the metabolic and cellular stress responses in an endemic catfish Horabagrus brachysoma acclimated to ambient (26 °C), 31, 33 and 36 °C for 30 days. After acclimation, fish were sampled to investigate changes in the levels of blood glucose, tissue glycogen and ascorbic acid, activities of enzymes involved in glycolysis (LDH), citric...
Article
Full-text available
The present laboratory study was conducted to assess the combined effect of increasing temperatures (26, 31,33 and 36°C) and a sub lethal chlorine concentration (0.1 mg L"1) on the acetylcholine esterase (AChE) activity and histology of brain and muscle in Labeo rohita. Fish were exposed to increasing temperatures only (control group) and in combin...
Article
Full-text available
The avifauna of the saltpans and adjoining mangrove areas near Naigaon railway station were surveyed from June 2015 to July 2016. A total of 124 bird species belonging to 46 families and 17 orders were observed during the study period. The study area harboured rich bird diversity including few migratory birds such as the Greater Flamingo (Phoenicop...
Article
Full-text available
The present study investigated the effect of increasing acclimation temperatures on the acetylcholine esterase (AChE) activity in the brain and muscle of an endemic catfish Horabagrus brachysoma. Fish were acclimated to 26 (ambient), 31, 33 and 36°C for 30 days. The AChE activity significantly decreased (P<0.05) in fish acclimated at 36°C. The resu...
Article
Full-text available
Information on the ecology and feeding behaviour of the large oceanic predatory fishes is crucial for the ecosystem approaches to fisheries management models. Co-existing large pelagic predators in the open oceans may avoid competition for the limited forage by resource partitioning on spatial, temporal or trophic levels. To test this, we studied t...
Article
Endosulfan is one of the most hazardous organochlorines pesticides responsible for environmental pollution, as it is very persistent and shows bio-magnification. This study evaluated the impact of acute endosulfan toxicity on metabolic enzymes, lysozyme activities, heat shock protein (Hsp) 70 expression, and histopathology in Tilapia (Oreochromis m...
Article
This study aimed to determine the cellular alterations in the gill of Labeo rohita exposed to lethal temperature maxima (LTM ax ) and lethal temperature minima (LTM in ) by means of transmission electron microscopy (TEM). Acclimation of advanced fingerlings of L. rohita was carried out at 26°C for 30 days. Acclimated fish were subjected to a consta...
Article
The aim of the study was to identify the diet composition, feeding preferences, size and sex related diet changes, and to calculate the consumption rates of common dolphinfish, Coryphaena hippurus, in the eastern Arabian Sea. Fish were caught using longline gear during the years 2006–2009. Stomachs of 238 specimens with fork lengths ranging from 32...
Article
Full-text available
The biological activity of crude methanolic extract (CME) of sea anemone Stichodactyla mertensii was screened. The CME was fractionated using diethylaminoethyl (DEAE – cellulose) and screened for hemolytic activity, mice bioassay, analegsic activity and neuromodulatory activity. The presence of protein was estimated to be 0.292 mg/ml in crude, foll...
Article
Full-text available
The effects of increasing temperatures and sub-lethal chlorine exposure on the metabolic responses of Labeo rohita were investigated. L. rohita fingerlings were acclimated to four different temperatures (26, 31, 33 and 36°C) and maintained for 30 days in two different groups (control and experimental). In addition to exposure to temperatures, the f...
Article
The heated effluents from the cooling systems of thermal power plants contain stress factors such as increasing temperature and chlorine (used to control biofouling). These factors may alter the immune function of fish. Hence, a 30 day study was carried out to demonstrate the concerted effects of elevated temperature and persistent sub-lethal conce...
Article
The epidermal secretion of fish contains various non-specific immune substances that act as the first line of defense against invading pathogens. The present study investigated the level of mucosal antibodies, the activities of hemagglutinin and protease, and other enzymes in the skin mucus of farm reared olive flounder (Paralichthys olivaceus) for...
Article
Full-text available
Every organism responds to heat stress by synthesizing a group of evolutionarily conserved proteins called the heat-shock proteins (HSPs) that, by acting as molecular chaperones, protect the cell against the aggregation of denatured proteins and play a significant role in adaptation to temperature. The present study aimed to investigate the critica...
Article
Full-text available
Two experiments, one short-term and one long-term, were conducted to elucidate the acute and chronic effects, respectively, of endosulfan exposure on the haemato-immunological and histopathological responses of Channa puncatatus. In the short-term study, fish were exposed to sublethal endosulfan (8.1 μg l(-1)) for 12, 24, 36, 48, 72 and 96 h. In th...
Article
Full-text available
A 2 × 2 × 2 factorial experiment was conducted to delineate the main effect of water soaking of plant ingredients, phytase, cellulase, and their interactions on the growth and digestive enzyme activities of Labeo rohita fingerlings. Two basal diets were prepared using water-soaked (S) or unsoaked (US) plant-based ingredients. Feed of US ingredients...
Article
Full-text available
The effect of higher packing density and increased duration of transport on the survival and key metabolic enzymes of Labeo rohita fry was investigated. L. rohita fry (length 40±5mm, weight 0.60±0.13g) were packed in two different densities 40 and 80g/l and sampled at 0, 12, 24, and 36h after packing. Results showed that packing density and length...
Article
A preliminary study was conducted to determine the ameliorating effect of dietary microbial levan against thermal stress in Labeo rohita juveniles. Six purified diets were prepared with different levels of microbial levan: basal (no levan), T1 (basal+0.25%), T2 (basal+0.50%), T3 (basal+0.75%), T4 (basal+1%) and T5 (basal+1.25%), fed to six groups o...
Article
Thermal tolerance using critical thermal methodology and oxygen consumption rates of Horabagrus brachysoma (23.01 + 2.04 g) were determined after acclimating the fish to 15, 20, 26, 31, 33 and 36 °C temperature for 30 days. Critical thermal maxima, CTMax, (34.86 ± 0.09, 38.05 ± 0.06, 40.23 ± 0.12, 41.79 ±0.09, 42.44 ± 0.05, and 42.79 ± 0.02) and cr...
Article
Lactococcus garvieae is an important etiological agent of lactococcosis in various fish species including olive flounder (Paralichthys olivaceus). In this study, proteomic and immunoproteomic analyses were employed to compare the antigenic profiles of strains KG9408, MS93003, and NSS9310 strains of L. garvieae. Proteomic analysis using two-dimensio...
Article
The etiological agents of streptococcosis were isolated from diseased olive flounder collected on the Jeju island of Korea. A total of 151 bacterial isolates were collected between 2003 and 2006. The isolates were examined using various phenotypic and proteomic analyses, including sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE)...
Article
The biochemical and stress responses of two Indian major carps, rohu Labeo rohita and mrigal Cirrhinus mrigala were studied after acclimating them to four preset temperatures (26, 31, 33 and 36 degrees C) for 30 days. The blood glucose and liver glycogen levels showed an inverse trend in both the species and were significantly different in L. rohit...
Article
Mass mortality was occurred in adult koi carp (Cyprinus carpio) at a private pond near Samchunpo city in the early November, 2007. Its water temperature was 11°C and turbidity was very high. The fishes diseased were shown widely distributed hemorrhages, deep ulcerations on the whole body surface and severe erosions in the all fins. In necropsy, exc...
Article
An experiment was conducted to study the metabolic modulation of Labeo rohita fingerlings (mean wt. 3.75 g) during starvation in terms of heat shock protein (Hsp70) expression in liver and muscle tissues and oxygen consumption rate. Hsp70 expression and oxygen consumption were measured following starvation of 0, 1, 2 or 3 weeks for the respective g...
Article
Full-text available
A feeding trial of 120 days was conducted to study the effect of graded levels of dietary phosphorus on haematology, serum protein concentrations and HSP70 expression in fingerlings of the Indian major carp, Catla (Catla catla). Eight isonitrogenous and isoenergetic purified diets were formulated to contain graded levels of dietary phosphorus (dP),...
Article
The rates of antibiotic susceptibility and resistance were investigated in Streptococcus iniae and Streptococcus parauberis isolates obtained from diseased olive flounders (Paralichthys olivaceus) collected from fish farms in Jeju Island, Korea. Isolates of S. iniae (n=65) were susceptible to cefotaxime, erythromycin, ofloxacin, penicillin, tetracy...
Article
A 60-day feeding trial was conducted to study the immuno-protective effect of microbial levan on Labeo rohita juveniles challenged with Aeromonas hydrophila. Six purified diets were prepared with different levels of microbial levan: control (no levan), T1 (Basal + 0.25%), T2 (Basal + 0.50%), T3 (Basal + 0.75%), T4 (Basal + 1%) and T5 (Basal + 1.25%...
Article
Apart from increased temperature, thermal effluents discharged through cooling systems of nuclear power plants may often contain chlorine (used against bio-fouling), which may affect the immune status of fish. Therefore, a 28-day trial was undertaken to delineate the effect of high temperature and a persistent sub-lethal chlorine exposure on immuno...
Article
Thermal effluents discharged through cooling systems of nuclear power plants often contain chlorine (used to control bio-fouling), which may affect the metabolic status of fishes. In order to evaluate the hypothesis, we tested the effect of high temperature and a persistent sub-lethal chlorine exposure on stress responses in Cyprinus carpio advance...
Article
The present study was designed to assess the embryonic development of Labeo rohita fertilized eggs incubated at four different temperatures (26, 31, 33 and 36°C) until hatching. Fertilization was carried out at ambient temperature (26°C) and was considered as 0h of embryonic development. Developmental stages were monitored by sampling embryos in di...

Projects

Project (1)