23 results match your criteria catfish rita

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Seasonal analysis of food items and feeding habits of endangered riverine catfish Rita rita (Hamilton, 1822).

Braz J Biol 2021 4;82:e237040. Epub 2021 Jun 4.

King Saud University, College of Science, Department of Zoology, Riyadh, Saudi Arabia.

This investigation presents the food and feeding activity of and endangered riverine catfish Rita rita, during February 2017-January 2018. A total of 225 fish individuals was analyzed for stomach contents by characterizing the dominant food items and morphometric features. The results divulged ten major food items consumed, preferably fish scales and eggs, teleost fishes, copepods, cladocerans, rotifers, and mollusks. Read More

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Transcriptomic responses to pollution in natural riverine environment in Rita rita.

Environ Res 2020 07 14;186:109508. Epub 2020 Apr 14.

ICAR- Central Inland Fisheries Research Institute, Fishery Resource and Environmental Management Division, Biochemistry Laboratory, Barrackpore, Kolkata, 700 120, India; ICAR-Fisheries Science Division, Krishi Anusandhan Bhawan II, Pusa, New Delhi, 110 012, India. Electronic address:

Aquatic pollution is one of the most common threats to the ecological health of aquatic ecosystems and its biota. Fish as lower vertebrates are excellent model to study the impact and responses of aquatic pollution. In fish, gill is the main organ indicator of whole animal health as it comes in contact with the surrounding water and absorbs many pollutants and contaminants; therefore, investigations on alterations in fish gill at transcriptome level could provide newer insights to the stress response mechanism(s) and pathways. Read More

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A new species of spiny driftwood catfish Spinipterus (Siluriformes: Auchenipteridae) from the Amazon basin.

J Fish Biol 2020 Jan 5;96(1):243-250. Epub 2019 Dec 5.

Instituto Nacional de Pesquisas da Amazônia-INPA, Coordenação de Biodiversidade, Manaus, Brazil.

An expedition to the middle Rio Purus basin uncovered a remarkable new species of the genus Spinipterus. The new species has a very distinct and conspicuous colour pattern resembling a jaguar and it is almost four times larger than Spinipterus acsi, a small specimen (32 mm L ) from Caño Santa Rita, a right bank tributary of Río Nanay in Peru and a second specimen was reported from Rio Juruá, Amazonas State, Brazil. Although the new species is more similar in size and colour pattern to Liosomadoras, it shares the synapomorphies for Spinipterus. Read More

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January 2020

Expression patterns of heat shock protein genes in Rita rita from natural riverine habitat as biomarker response against environmental pollution.

Chemosphere 2018 Nov 23;211:535-546. Epub 2018 Jul 23.

ICAR- Central Inland Fisheries Research Institute, Fishery Resource and Environmental Management Division, Biochemistry Laboratory, Barrackpore, Kolkata 700 120, India. Electronic address:

River pollution is one of the principal environmental concerns and biomonitoring tools can play an important role in pollution assessment in the riverine environment. Heat shock proteins (Hsps) have been found to be suitable tools for monitoring stress response. In the present study, expression analyses of hsp genes (hsp27, hsp47, hsp60, hsp70, hsc70, and hsp90) and selected hsp-regulatory genes (hsf1, hyou1, ask1, jnk) were carried out by RT-qPCR in catfish Rita rita collected from selected stretches of river Ganga to investigate changes in their expression patterns as biomarker response. Read More

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November 2018

Expression patterns and mutation analysis of p53 in fish Rita rita from polluted riverine environment.

Mutat Res Genet Toxicol Environ Mutagen 2018 Aug 31;832-833:41-51. Epub 2018 May 31.

ICAR - Central Inland Fisheries Research Institute, Fishery Resource and Environmental Management (FREM) Division, Biochemistry Laboratory, Barrackpore, Kolkata, 700120, India.

The present study was undertaken to investigate the alterations in gene expression patterns and for mutation analysis of p53 in the riverine catfish Rita rita collected from polluted riverine habitat. The partial p53 gene sequence of Rita rita generated showed a high degree of similarities with the DNA binding domains of fishes, mice and human. Transcriptomic analysis, carried out by quantitative real-time Polymerase Chain Reaction (RT-qPCR), showed significant down-regulation of p53 in fishes collected from most of the polluted stretches. Read More

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Proteomic profiling of white muscle from freshwater catfish Rita rita.

Fish Physiol Biochem 2015 Jun 26;41(3):789-802. Epub 2015 Mar 26.

Proteomics Unit, Biochemistry Laboratory, Fishery Resource and Environmental Management Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, 700 120, India,

Muscle tissues contribute 34-48 % of the total body mass in fish. Proteomic analysis enables better understanding of the skeletal muscle physiology and metabolism. A proteome map reflects the general fingerprinting of the fish species and has the potential to identify novel proteins which could serve as biomarkers for many aspects of aquaculture including fish physiology and growth, flesh quality, food safety and aquatic environmental monitoring. Read More

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Morphological observation and length-weight relationship of critically endangered riverine catfish Rita rita (Hamilton).

Pak J Biol Sci 2014 Jan;17(2):234-40

The experiment was conducted to investigate the morphological status of the critically endangered riverine catfish Rita rita using morphometric and meristic traits. About 158 species of Rita were collected from the old Brahmaputra river in Mymensingh district and were studied in the laboratory of the Fisheries Biology and Genetics Department, Bangladesh Agricultural University. Measurement of length and weight of Rita were recorded by using measuring scale and electric balance respectively. Read More

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January 2014

Complete mitochondrial genome of the Freshwater Catfish Rita rita (Siluriformes, Bagridae).

Mitochondrial DNA 2015 4;26(6):817-8. Epub 2015 Sep 4.

b Centre for Applied Aquatic Genomics, Chinese Academy of Fishery Sciences , Beijing , China , and.

The complete mitochondrial genome of Catfish, Rita rita, was isolated by LA PCR (TakaRa LAtaq, Dalian, China); and sequenced by Sanger's method to obtain the complete mitochondrial genome, which is listed Critically Endangered and Red Listed species. The complete mitogenome was 16,449 bp in length and contains 13 typical vertebrate protein-coding genes, 2 rRNA and 22 tRNA genes. The whole genome base composition was estimated to be 33. Read More

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Serous goblet cells: the protein secreting cells in the oral cavity of a catfish, Rita rita (Hamilton, 1822) (Bagridae, Siluriformes).

Tissue Cell 2014 Feb 2;46(1):9-14. Epub 2013 Sep 2.

Skin Physiology Laboratory, Centre of Advanced Study, Department of Zoology, Banaras Hindu University, Varanasi 221 005, Uttar Pradesh, India.

Serous goblet cells in the oral epithelium of Rita rita are characterized by the presence of distinct eosinophilic granules occupying large parts of the cytoplasm. In R. rita, a range of histochemical results reveal that these cells are involved in proteinaceous secretions, and thus likely contribute to various functions analogous to those of mammalian saliva. Read More

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February 2014

Ritacestus gen. n. (Cestoda: Proteocephalidea) and redescription of R. ritaii comb. n., a parasite of Rita rita (Siluriformes) in India.

Folia Parasitol (Praha) 2011 Nov;58(4):279-88

Department of Invertebrates, Natural History Museum, P.O. Box 6434, CH-1211 Geneva 6, Switzerland.

A new genus, Ritacestus, is proposed to accommodate Ritacestus ritaii (Verma, 1926) comb. n. (syn. Read More

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November 2011

Surface ultrastructure of the gill filaments and the secondary lamellae of the catfish, Rita rita, and the carp, Cirrhinus mrigala.

Microsc Res Tech 2012 Apr 29;75(4):433-40. Epub 2011 Sep 29.

Skin Physiology Laboratory, Centre of Advanced Study, Department of Zoology, Banaras Hindu University, Varanasi 221 005, Uttar Pradesh, India.

Surface ultrastructures of gill filaments and secondary lamellae of Rita rita and Cirrhinus mrigala, inhabiting different ecological habitat, were investigated to unravel adaptive modifications. R. rita is a sluggish, bottom dwelling carnivorous catfish, which inhabits regions of river with accumulations of dirty water. Read More

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Lens proteome map and alpha-crystallin profile of the catfish Rita rita.

Indian J Biochem Biophys 2011 Feb;48(1):35-41

Central Inland Fisheries Research Institute, Indian Council of Agricultural Research, Barrackpore, Kolkata 700120, India.

Crystallins are a diverse group of proteins that constitute nearly 90% of the total soluble proteins of the vertebrate eye lens and these tightly packed crystallins are responsible for transparency of the lens. These proteins have been studied in different model and non-model species for understanding the modifications they undergo with ageing that lead to cataract, a disease of protein aggregation. In the present investigation, we studied the lens crystallin profile of the tropical freshwater catfish Rita rita. Read More

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February 2011

Histochemical analysis of glycoproteins in the secretory cells in the gill epithelium of a catfish, Rita rita (Siluriformes, Bagridae).

Tissue Cell 2009 Aug 23;41(4):271-80. Epub 2009 Feb 23.

Skin Physiology Laboratory, Centre of Advanced Study, Department of Zoology, Banaras Hindu University, Varanasi 221 005, Uttar Pradesh, India.

Glycoproteins (GPs) were visualised histochemically in the secretory cells - the mucous goblet cells (the type A and the type B), the serous goblet cells, the club cells and the epithelial cells in the gill epithelium of Rita rita. The type A mucous goblet cells, the type B mucous goblet cells and the epithelial cells elaborate GPs with oxidizable vicinal diols and GPs with sialic acid residue without O-acyl substitution. In addition, GPs with O-sulphate esters are elaborated by the type A and GPs with O-acyl sugars by the type B mucous goblet cells. Read More

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Pesticide residues and reproductive dysfunction in different vertebrates from north India.

Food Chem Toxicol 2008 Jul 15;46(7):2533-9. Epub 2008 Apr 15.

Department of Zoology, Tilak Dhari College, Jaunpur 222 002, India.

Organochlorines (isomers of hexachlorocyclohexane--HCHs and metabolites of dichlorodiphenyltrichloroethane--DDTs, aldrin and endosulfan) and organophosphate (chlorpyrifos) insecticide residues were investigated by gas liquid chromatography in the blood of fish, chick, goat and man. The plasma levels of testosterone (T) and estradiol-17beta (E2) was measured by radioimmunoassay in the catfish Rita rita captured from unpolluted reference site and polluted river Gomti during prespawning phase. Results indicated that in R. Read More

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Effects of dietary arginine on hematological parameters and innate immune function of channel catfish.

J Aquat Anim Health 2007 Sep;19(3):195-203

Centro de Investigaciones Biológicas del Noroeste, S.C., Mar Bermejo 195, Coll. Playa Palo Santa Rita, C.P. 23090, La Paz, Baja California Sur, Mexico.

The effects of elevated dietary arginine on the hematology and immune function of juvenile channel catfish Ictalurus punctatus were evaluated by means of in vivo and in vitro experiments. Healthy juvenile channel catfish (average weight, 34.8 g) were fed casein-gelatin-based diets containing 28% crude protein and supplemented with crystalline L-arginine (ARG) at 0. Read More

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September 2007

Preponderance of GC-rich sites in silver-stained nucleolus organizing regions of Rita rita (Hamilton) and Mystus gulio (Hamilton) (Bagridae, Pisces), as revealed by chromomycin A3-staining technique and scanning electron microscopic studies.

Genet Mol Res 2007 May 10;6(2):284-91. Epub 2007 May 10.

Cytogenetics and Molecular Biology Laboratory, Department of Zoology, University of Kalyani, Kalyani, India.

The karyotypes of two species of catfish, Rita rita (Hamilton) (2n = 54; 14m + 34sm + 6st; NF = 102) and Mystus gulio (Hamilton) (2n = 58; 30m + 12sm + 2st + 14t, NF = 100) were studied through Giemsa-, silver- and chromomycin A(3)-staining techniques. The silver-stained karyotypes in both sexes of R. rita and M. Read More

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Histochemical characterization of glycoproteins in the buccal epithelium of the catfish, Rita rita.

Acta Histochem 2007 8;109(4):285-303. Epub 2007 May 8.

Skin Physiology Laboratory, Centre of Advanced Study, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India.

Glycoproteins (GPs) elaborated by the buccal epithelium of the catfish, Rita rita, were analysed by a range of histochemical methods. These included methods for the characterization and simultaneous visualization of GPs with oxidizable vicinal diols, with O-acyl sugars, with O-sulphate esters and with sialic acid residues with and without O-acyl substitution at C7, C8 or C9. GPs elaborated at the surface of the buccal epithelium are primarily from two sources, the epithelial cells and the mucous goblet cells. Read More

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September 2007

A phylogenetic analysis of the major groups of catfishes (Teleostei: Siluriformes) using rag1 and rag2 nuclear gene sequences.

Mol Phylogenet Evol 2006 Dec 10;41(3):636-62. Epub 2006 Jun 10.

Department of Ichthyology, Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, PA 19103, USA.

Higher-level relationships among catfishes were investigated by parsimony, maximum likelihood and Bayesian analyses of two nuclear genes across 110 catfish species representing 36 of 37 families and Conorhynchos (family incertae sedis). Analysis of 3660 aligned base pairs from the rag1 and rag2 genes confirms monophyly of Siluriformes, of most siluriform families and of a number of multifamily groups, some recognized, some novel. South American Loricarioidei are recovered as the sistergroup to other catfishes which are divided into Diplomystidae and Siluroidei. Read More

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December 2006

Morphology of the pharyngeal cavity, especially the surface ultrastructure of gill arches and gill rakers in relation to the feeding ecology of the catfish Rita rita (Siluriformes, Bagridae).

J Morphol 2005 Aug;265(2):197-208

Skin Physiology Laboratory, Centre of Advance Study, Department of Zoology, Banaras Hindu University, Varanasi 221 005, Uttar Pradesh, India.

Gill arches and the gill rakers of a sluggish, carnivorous catfish, Rita rita, show significant differences of their surface ultrastructure, which are recognized adaptive modifications in relation to food and feeding ecology of fish. Gill rakers on the first and second pairs of gill arches are borne on the oral side and are long and stout at the epi-ceratobranchial union. Gill rakers on the third and fourth pairs of gill arches, in contrast, are borne on the oral and aboral sides and are relatively delicate and short. Read More

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Cytochrome P4501A responses in two tropical fish species, riverine catfish (Rita rita) and marine mudfish (Apocryptes bato).

Comp Biochem Physiol C Toxicol Pharmacol 2002 Jan;131(1):61-71

Department of Fisheries and Marine Biology, University of Bergen, HIB, N-5020, Bergen, Norway.

The present study focuses on the establishment of methods for biomarker studies in freshwater and marine fish species as a basis for monitoring the extent of contamination of fisheries resources in tropical waters. Riverine catfish (Rita rita) and marine mudfish (Apocryptes bato) were given a single intraperitoneal injection with two selected inducing compounds; beta-naphthoflavone (BNF, 50 mg/kg) and a polychlorinated biphenyl mixture (Clophen A50, 20 mg/kg), and the heavy metal compound cadmium chloride (CdCl2, 1 mg/kg). Effects on cytochrome P4501A (CYP1A) were determined in post-mitochondrial supernatants (PMS) of liver at days 3 and 10 after treatment. Read More

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January 2002

Detergent-induced changes in the mapping of certain enzymes in various cell types of Rita rita. II. Gill epithelium.

Authors:
D Roy

Ecotoxicol Environ Saf 1989 Feb;17(1):67-74

Central Marine Fisheries Research Institute, Ernakulam, Cochin, India.

Rita rita were exposed to 6.9 mg/liter (96-hr LC50 of an anionic detergent, dodecylbenzene sodium sulfonate). Loss of activity of certain enzymes responsible for various metabolic processes in fish gill epithelium was observed using a battery of histochemical techniques. Read More

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February 1989

Detergent-induced changes in the mapping of certain enzymes in various cell types of Rita rita. I. Opercular epidermis.

Authors:
D Roy

Ecotoxicol Environ Saf 1989 Feb;17(1):59-66

Department of Zoology, Banaras Hindu University, Varanasi, India.

The different cell types in the opercular epidermis of Rita rita when exposed to a synthetic detergent, dodecylbenzene sodium sulfonate in the concentration of 6.9 mg liter-1 (96-hr LC50 of the detergent), had a gradual decrease in the activity of various enzymes responsible for different metabolic processes occurring inside the cell. After a certain period of detergent exposure, the activities of all the enzymes in these cells are completely inhibited. Read More

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February 1989
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