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Cichlids (1):
Recent article
Cichlids
Abstract
We report the functional annotation and comparative analyses of transcriptome data sets for two eastern African cichlid species, Astatotilapia burtoni and Ophthalmotilapia ventralis, representatives of the modern haplochromines and ectodines, respectively. Nearly 647,000 expressed sequence tags were...
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PMID: 21617250
PDF is available here.
PDF is available here.
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Abstract
Nile tilapia (Oreochromis niloticus) were fed by diets supplemented with cyanobacteria containing in part the cyanotoxin microcystin-LR (MC-LR) to determine the potential impacts on detoxification. Four different diets were prepared based on a commercial diet: (1) control, (2) MC-5% (containing 5% d...
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PMID: 20949194
PDF is available here.
PDF is available here.
Abstract
The current study was conducted to evaluate the ability of Egyptian bentonite (EB) and montmorillonite (EM) for the prevention of genotoxicity, histochemical and biochemical changes induced by aflatoxin B(1) (AFB(1)) using the micronucleus (MN) assay, chromosomal aberrations and DNA fragmentation an...
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PMID: 20817254
PDF is available here.
PDF is available here.
Abstract
The pyrometallurgical process of mining for obtaining ferronickel involves a stage of calcinations. At this stage a residue is generated described as a calcination dust of fine black grains. Analysis of this material revealed a significant presence of Fe, around 53,000 ppm and Ni, around 14,000, bey...
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PMID: 20936513
PDF is available here.
PDF is available here.
Behavioural Processes (85)1 2010
Abstract
We test whether the highly social, cooperatively breeding cichlid fish Neolamprologus pulcher shows lateralized responses to a social stimulus. We found population-level biases in males; on average male N. pulcher use their right eye/left hemisphere to view their mirror image. Individual females had...
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PMID: 20547214
PDF is available here.
PDF is available here.
Abstract
A dose titration study was conducted to determine the dosage of florfenicol (FFC) in feed to control Streptococcus iniae-associated mortality in Nile tilapia Oreochromis niloticus. Six tanks were assigned to each of five treatments: (1) not challenged with S. iniae and fed unmedicated feed; (2) chal...
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PMID: 21192545
PDF is available here.
PDF is available here.
Folia morphologica (69)3 2010
Abstract
The cellular organisation of the olfactory rosettes of Etroplus suratensis was studied by light and scanning electron microscopy. The oval shaped olfactory rosette of the fish consists of 12 lamellae radiating from a central raphe. The olfactory lamellae are comprised of restricted areas of sensory...
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PMID: 21154285
PDF is available here.
PDF is available here.
Abstract
We report that this handedness and mouth bending asymmetry are not jointly and exclusively determined by a single major locus. We found no evidence of a major locus for asymmetry and some support for a major handedness locus. Also, asymmetry is plastic in this species: it can change in adults. We su...
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PMID: 20199561
PDF is available here.
PDF is available here.
Abstract
We report that this handedness and mouth bending asymmetry are not jointly and exclusively determined by a single major locus. We found no evidence of a major locus for asymmetry and some support for a major handedness locus. Also, asymmetry is plastic in this species: it can change in adults. We su...
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PMID: 20199561
PDF is available here.
PDF is available here.
Abstract
We report that this handedness and mouth bending asymmetry are not jointly and exclusively determined by a single major locus. We found no evidence of a major locus for asymmetry and some support for a major handedness locus. Also, asymmetry is plastic in this species: it can change in adults. We su...
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PMID: 20199561
PDF is available here.
PDF is available here.
Abstract
We first review research to date on the species complex and the geological history of its habitat. We analyse body shape variation from all currently described species in the complex, sampled from six crater lakes (maximally 1.2-23.9 kyr old) and both great lakes in Nicaragua. We find that Midas cic...
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PMID: 20439280
PDF is available here.
PDF is available here.
Abstract
This study compared the parasitic fauna on Nile tilapias kept with swine dejects and tilapia from fee fishing fed commercial ration. A total of 360 fish were analyzed from August 2003 to July 2004 in a facility situated in Nova Trento, Santa Catarina, Brazil. No significant difference was observed i...
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PMID: 20563429
PDF is available here.
PDF is available here.
Abstract
We report that the allometric relationship was negative across populations of a shell-brooding cichlid fish Lamprologus callipterus, although males are extremely larger than females. Male L. callipterus collect and defend empty snail shells in each of which a female breeds. We found that, across six...
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PMID: 20689182
PDF is available here.
PDF is available here.
Abstract
Journal of Parasitology (96)3 2010
Abstract
During parasitological research on cichlid fish from the tributaries of the Amazon River around Iquitos, Peru, the following gill monogenoidean species were found: Tucunarella cichlae n. gen. and n. sp. from Cichla monoculus Spix and Agassiz; Gussevia alioides Kritsky, Thatcher, and Boeger, 1986 fro...
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PMID: 20557192
PDF is available here.
PDF is available here.
Abstract
The responses of Mozambique and Nile tilapia acclimated to fresh water (FW) and brackish water (BW; 17 per thousand) were compared following acute salinity challenges. In both species, plasma osmolality increased to above 450 mOsm by 2h after transfer from FW to seawater (SW); these increases in osm...
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PMID: 20138183
PDF is available here.
PDF is available here.
Journal of Experimental Biology (213)Pt 9 2010
Abstract
We used electrophysiology to assess spectral sensitivity in this species and found evidence of four sensitivity peaks in the ranges 380-420, 440-480, 500-600 and 600-680 nm, with maximal sensitivity at longer wavelengths. The continued presence of a 380-420 nm peak under long-wavelength chromatic ad...
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PMID: 20400629
PDF is available here.
PDF is available here.
Marine Biotechnology (12)2 2010
Identification of repetitive elements in the genome of Oreochromis niloticus: tilapia repeat masker.
Abstract
We estimate that repeats constitute about 14% of the tilapia genome and also give estimates for the occurrence of the different repeats based on the Basic Local Alignment Search Tool searches within the database of known tilapia sequences. The frequent occurrence of novel repeats in the tilapia geno...
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PMID: 19936833
PDF is available here.
PDF is available here.
Current Biology (20)5 2010
Abstract
The sequencing of three Nasonia genomes provides new insights on the molecular signature associated with parasitoid lifestyle, allows comparison with the social honey bee, and enables the identification of genes underlying between-species and sex-specific differences.
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PMID: 20219176
PDF is available here.
PDF is available here.
Abstract
We obtained samples using gill nets of six mesh sizes, and collecting fish from commercial catches, on a bimonthly basis, from November 2006 to September 2007. Total length (Lt), total weight (Pt), sex and gonadosomatic maturity were analyzed. Age determination was done by readings of scale growth m...
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PMID: 20411726
PDF is available here.
PDF is available here.
Abstract
Antibacterial effects of aqueous and ethanolic extracts of seeds of moringa (Moringa oleifera) and pods of soursop (Annona muricata) in the concentration of 1:5 and 1:10 in volumes 50, 100, 150 and 200 microL were examined against Staphylococcus aureus, Vibrio cholerae, Escherichia coli (isolated fr...
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PMID: 20602021
PDF is available here.
PDF is available here.
Folia Biologica (Krakow) (58)1-2 2010
Abstract
The karyotypes of three species of fish of the Cichlidae family from the Forqueta river and several locations in Guaiba lake/RS (Brazil) were analyzed. All species presented 2n=48, while Gymnogeophagus gymnogenys showed two karyotypic formulae: 4m+44st-a with FN=52 and 6m+42st-a with FN=54. Gymnogeo...
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PMID: 20420192
PDF is available here.
PDF is available here.
BMC Genetics (11)1 2010
Abstract
The karyotype diversification of cichlids seems to have occurred through several chromosomal rearrangements involving fissions, fusions and inversions. It was possible to identify karyotype markers for the subfamilies Pseudocrenilabrinae (African) and Cichlinae (American). The karyotype analyses did...
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PMID: 20550671
PDF is available here.
PDF is available here.
Abstract
We quantified the extent to which mixing models yield erroneous results with an experiment using Nile tilapia (Oreochromis niloticus). The tilapia were fed synthetic diets that varied in protein content and in which the carbon isotopic composition of protein differed widely from that of carbohydrate...
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PMID: 20201680
PDF is available here.
PDF is available here.
Abstract
We present a comprehensive and integrative phylogeographic analysis of the complete Midas Cichlid species complex in Nicaragua (> 2000 individuals) covering the entire distributional range, using two types of molecular markers (the mitochondrial DNA control region and 15 microsatellites). We investi...
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PMID: 20977752
PDF is available here.
PDF is available here.
Abstract
We determined if Heroine cichlids experienced a burst of diversification following their invasion of Central America.
We first reconstructed the Heroine phylogeny and determined the basal node to use as the root of Central American Heroine diversification. We then examined the influence of incomplet...
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PMID: 20840768
PDF is available here.
PDF is available here.
Abstract
We used a common-garden rearing experiment to explore environmentally induced tolerance to hypoxia in the African mouth-brooding cichlid Pseudocrenilabrus multicolor. F(1) fish originating from three field populations were grown under low or high dissolved oxygen (DO), and their resting routine meta...
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PMID: 20337529
PDF is available here.
PDF is available here.
Abstract
We developed a wireless biosensor system to continuously monitor the total cholesterol concentration in fish (Nile tilapia, Oreochromis niloticus). The biosensor was constructed with Pt-Ir wire (phi0.178 mm) as the working electrode and Ag/AgCl paste as the reference electrode. Cholesterol oxidase a...
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PMID: 19836572
PDF is available here.
PDF is available here.
Abstract
We identified the genetic basis for the orange-blotch (OB) color pattern, a trait under sexually antagonistic selection in the cichlid fish of Lake Malawi, East Africa. The OB phenotype is due to a cis-regulatory mutation in the Pax7 gene. OB provides benefits of camouflage to females but disrupts t...
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PMID: 19797625
PDF is available here.
PDF is available here.
Current Eye Research (34)11 2009
Abstract
A proteomics approach has been used to identify differentially expressed proteins in form-deprived combined retinal, RPE, and choroidal tissue from myopic versus normal eyes. The identified proteins may be components of pathways involved in myopia pathogenesis....
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PMID: 19958113
PDF is available here.
PDF is available here.
Behavioural Processes (82)1 2009
Abstract
Theory predicts that fish should show colour-assortative shoaling in order to avoid the oddity effect whereby individuals that differ in some feature from the group majority appear to incur increased risk of predation. It has also been shown that early experience plays an important role in affecting...
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PMID: 19376208
PDF is available here.
PDF is available here.
Abstract
During shipping, ornamental fish can be stressed due to handling, high stocking densities, and deteriorating water quality. Adding sedatives, such as metomidate hydrochloride, to shipping water may improve fish survival rates and the percentage of fish in saleable condition. Although the effects of...
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PMID: 20043397
PDF is available here.
PDF is available here.
Abstract
Fish francisellosis is an emergent disease caused by gram-negative facultative intracellular bacteria of the genus Francisella. Different strains of the bacterium have caused high mortalities in warmwater and coldwater fish species. Francisella sp. isolates from fish have been found to share more th...
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PMID: 20043398
PDF is available here.
PDF is available here.
Abstract
A total of 410 Tilapia zillii, 70 Clarias gariepinus, 30 Bagrus bajad and 15 Chlrysichthys auratus fishes were collected from different water bodies in Qualyobia Governorate. Microscopic examination of samples showed infection in muscles and head region (gills & branchial cavity) with encysted metac...
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PMID: 19795754
PDF is available here.
PDF is available here.
Abstract
Ichthyophthirius multifiliis Fouquet (Ich) and Streptococcus iniae are 2 major pathogens of cultured Nile tilapia Oreochromis niloticus (L). Currently there is no information available for the effect of coinfection by Ich and S. iniae on fish. The objective of this study was to determine the effects...
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PMID: 19750806
PDF is available here.
PDF is available here.
Behavioural Brain Research (201)1 2009
Abstract
We investigate the relationship between individual variation of asymmetry in the habenula of a South American cichlid fish, Geophagus brasiliensis, and behaviour in a commonly used test for visual laterality in fish, the detour task. We show that the strength of asymmetry in the habenula is correlat...
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PMID: 19428637
PDF is available here.
PDF is available here.
Abstract
We compared the reproductive behavior (nesting, courtship and spawning) and gonadosomatic index (GSI) of pairs of fish under all four conditions. Visual communication enhanced the frequency of courtship in males (mean +/- SEM; V: 24.79 +/- 3.30, Ch+V: 20.74 +/- 3.09, Ch: 0.1 +/- 0.07, Iso: 4.68 +/-...
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PMID: 19330265
PDF is available here.
PDF is available here.
Abstract
We discuss the diversity of their visual systems. Cichlids have seven unique cone opsin genes, which produce visual pigments sensitive from the ultraviolet to the red end of the spectrum. Different species typically express three visual pigments to produce a trichromatic visual system. Because speci...
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PMID: 21392278
PDF is available here.
PDF is available here.
Abstract
Freshwater fish Oreochromis niloticus exposed to 0.05 microg/mL of Cu, Cd, Zn, Ag and Cr for up to 30 days. Only Ag, which exceeded environmentally realistic concentrations by a factor of >100 caused fish mortality within this period. Metals increased aspartate transaminase (AST) activity, while the...
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PMID: 18953474
PDF is available here.
PDF is available here.
Molecules and Cells (27)3 2009
Abstract
We used pharmacologic and molecular approaches to identify the muscarinic subreceptors and the intracellular signaling pathways involved in this motility. Myography assays revealed that an M1- and M3-subtype selective antagonist, but not a M2-subtype selective antagonist, inhibited carbachol HCI (CC...
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PMID: 19326086
PDF is available here.
PDF is available here.
Abstract
Nile tilapia Oreochromis niloticus were medicated with florfenicol (AQUAFLOR type A medicated article; Schering-Plough Animal Health, Summit, New Jersey) via a medicated ration at 15 mg florfenicol x kg fish body weight(-1) d(-1) for 10 d to compare the elimination kinetics of the test article in di...
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PMID: 19485121
PDF is available here.
PDF is available here.
Abstract
The objective of this study was to characterize the reproduction of Cichla kelberi in an artificial lake, located in the municipality of Leme, in the state of São Paulo, Brazil. Breeding occurred in spring, and summer. The L(50) and the L(100) of this species were 192 and 235 mm (L(50)), for male...
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PMID: 19347162
PDF is available here.
PDF is available here.
Abstract
This work evaluates the variation of the parasitological indexes in 114 Cichla piquiti Kullander and Ferreira, 2006 (tucunaré) infected by two proteocephalid species (Cestoda) for the period of August 1999 to June 2001 in the Volta Grande reservoir, MG, Brazil. The relation between the parasitosi...
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PMID: 19347164
PDF is available here.
PDF is available here.
Abstract
We used phylogenetic comparative analyses of sexed adults from 39 Tanganyikan cichlid species in a multiple regression framework to investigate the influence of ecology, sexual selection and parental care patterns on whole brain size, as well as to analyse sex-specific effects. First, using species-...
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PMID: 18796397
PDF is available here.
PDF is available here.
Abstract
The purpose of this paper is to investigate the protein enrichment of apple pomace by Gongronella butleri through solid-state cultivation and addition of this material as feed for tilapia fry (Oreochromis niloticus). Factorial experimental design was used for the assessment of culture conditions to...
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PMID: 18600303
PDF is available here.
PDF is available here.
Neuroendocrinology (89)1 2009
Abstract
We unexpectedly found immunoreactive neurons in the preoptic area, sending their projections through different brain areas and neurohypophysis. Our previous work using Western blot and IHC techniques applied to the adult brain confirmed these findings. To further demonstrate the extrapituitary expre...
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PMID: 18758154
PDF is available here.
PDF is available here.
Biological Research (42)4 2009
Abstract
This study evaluates the bioactivity of the crude ethanol extract and ethyl acetate, hexane and chloroform fractions obtained from Eugenia uniflora leaves using the hepatopancreas of Oreochromis niloticus L. as an experimental model. The ethanol extract and fractions were administered to the fish or...
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PMID: 20140296
PDF is available here.
PDF is available here.
Biological Research (42)2 2009
Abstract
Hyptidendron canum (Pohl ex Benth.) Harley is a native tree of the Brazilian Savannah. The fish Oreochromis niloticus L. was used as an experimental model to determine the bioactivity of the crude ethanol extract as well as ethyl acetate, hexanic and chloroform fractions obtained from its leaves. Th...
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PMID: 19746260
PDF is available here.
PDF is available here.
Behavioural Processes (80)1 2009
Abstract
We examined whether this sexual dimorphism was reflected in a female-biased actual sex ratio (ASR) and whether convict cichlid females would exhibit behavioral traits typified in monogamous males when they possessed the extravagant colors and/or morphology. Our field observations revealed that femal...
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PMID: 18929629
PDF is available here.
PDF is available here.
Abstract
We analyzed karyotypes and cytogenetic characteristics of Symphysodon aequifasciatus, S. discus and S. haraldi using C-banding and fluorescent in situ hybridization (FISH) with the Rex3 retrotransposon and 5S rDNA probes in mitotic and meiotic chromosomes. In the 3 species, diploid chromosome number...
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PMID: 20110656
PDF is available here.
PDF is available here.
Abstract
Surprisingly, laboratory mate choice experiments revealed significant assortative mating not only between population pairs with differently coloured males, but between population pairs with similarly-coloured males too. This suggested that assortative mating could be based on non-visual cues, so we...
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PMID: 19265521
PDF is available here.
PDF is available here.
Abstract
In concordance with previous studies, the root of the East African cichlid radiations is nested within the so called "Tilapias", which is a paraphyletic assemblage. For the first time, we clarified tilapiine intragroup relationships and established three new monophyletic groups:"Oreochromini", "Bore...
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PMID: 19656365
PDF is available here.
PDF is available here.
Abstract
In mate choice experiments, both sexes preferred large mates irrespective of own body size suggesting mating preferences are not size-assortative. Especially males were highly selective for large females, probably because female body size signals direct fitness benefits. However, when potential mate...
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PMID: 19515244
PDF is available here.
PDF is available here.
Abstract
We apply Ontogenetic Sequence Analysis to 261 embryos of the Lake Victoria cichlid Haplochromis piceatus. The result of our analysis can be mapped as a complex web of 26,880 equally parsimonious developmental sequences. This topology reflects timing polymorphism (intraspecific heterochrony) among em...
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PMID: 19878284
PDF is available here.
PDF is available here.
Abstract
We recorded net development time of each organogenetic stage, cumulative time and characteristic structure differentiation for each stage. We found eight organogenetic stages for the digestive system, between the gastrula and the total re-adsorption of the vitelin sack. The total time for the organo...
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PMID: 19419087
PDF is available here.
PDF is available here.
Environmental Pollution (156)3 2008
Abstract
We use a multibiomarker approach in fish as an integrated strategy to assess the impact of pollution. It comprehends a general biomarker of fish health, the condition factor (CF), and specific biomarkers of contaminant exposure such as metallothionein (MT), acetylcholinesterase (AChE) activity and b...
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PMID: 18524439
PDF is available here.
PDF is available here.
Journal of Parasitology (94)6 2008
Abstract
I (cox1) strongly supports the status of O. mayae as a new species, as compared to O. manteri collected from cichlids in other localities of Mexico, Belize, and Guatemala....
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PMID: 18576841
PDF is available here.
PDF is available here.
Abstract
We have added and analyzed independent data sets (nuclear and morphological) to further confirm and strengthen the cytb-phylogenetic hypothesis. We have analyzed a combined cytb-nuclear (RAG1 and two S7 introns) data set of 48 species representing main heroine lineages to achieve further resolution...
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PMID: 18725305
PDF is available here.
PDF is available here.
Abstract
We tested whether the fish Nile tilapia (Oreochromis niloticus) in a monosex male group spends more energy and displays an agonistic profile, differently from males in male-female groups. Such differences are expected because males and females should compete for different reproductive resources. An...
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PMID: 19197498
PDF is available here.
PDF is available here.
Abstract
We noted that the ethanol extract of Psidium guajava leaf exhibited the strongest antimicrobial activity. The extract allowed growth-inhibited A. hydrophila cells to regrow in fresh BHI broth indicating a bacteriostatic mode of action. In a pathogenicity test, the median lethal dose (LD(50)) of A. h...
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PMID: 19111636
PDF is available here.
PDF is available here.