comparative cytogenetic mapping of sox2 and sox14 in cichlid fishes and inferences on the genomic organization of both genes in better understand the genomic organization and evolution of sox genes in vertebrates, we cytogenetically mapped sox2 and sox14 genes in cichlid fishes and performed comparative analyses of their orthologs in several vertebrate species. the genomic regions neighboring sox2 and sox14 have been conserved during vertebrate diversification. although cichlids seem to have undergone high rates of genomic rearrangements, sox2 and sox14 are linked in the same chromosome in the etroplinae etroplus macu ...201121691861
the life cycle of mesostephanus indicum mehra, 1947 (digenea: cyathocotylidae).the life cycle of the cyathocotylid fluke, mesostephanus indicum mehra, 1947 infecting the pariah kite, milvus migrans govinda (accipitridae), is elucidated. the species, reported by mehra (proc nat acad sci india 17:1-52, 1947) from buteo rufinus rufinus (accipitridae), was transferred to the genus prohemistomum by dubois (rev suiss de zool 58:639-691, 1951). however, it is retained in the genus mesostephanus because of the presence of vaginal sphincter and caudal appendage, which are the chara ...200717514481
are accessory hearing structures linked to inner ear morphology? insights from 3d orientation patterns of ciliary bundles in three cichlid species.cichlid fishes show considerable diversity in swim bladder morphology. in members of the subfamily etroplinae, the connection between anterior swim bladder extensions and the inner ears enhances sound transmission and translates into an improved hearing ability. we tested the hypothesis that those swim bladder modifications coincide with differences in inner ear morphology and thus compared steatocranus tinanti (vestigial swim bladder), hemichromis guttatus (large swim bladder without extensions ...201424645675
a unique swim bladder-inner ear connection in a teleost fish revealed by a combined high-resolution microtomographic and three-dimensional histological most modern bony fishes (teleosts) hearing improvement is often correlated with a close morphological relationship between the swim bladder or other gas-filled cavities and the saccule or more rarely with the utricle. a connection of an accessory hearing structure to the third end organ, the lagena, has not yet been reported. a recent study in the asian cichlid etroplus maculatus provided the first evidence that a swim bladder may come close to the lagena. our study was designed to uncover th ...201323826967
hearing in cichlid fishes under noise conditions.hearing thresholds of fishes are typically acquired under laboratory conditions. this does not reflect the situation in natural habitats, where ambient noise may mask their hearing sensitivities. in the current study we investigate hearing in terms of sound pressure (spl) and particle acceleration levels (pal) of two cichlid species within the naturally occurring range of noise levels. this enabled us to determine whether species with and without hearing specializations are differently affected ...201323469032
relationship between swim bladder morphology and hearing abilities--a case study on asian and african cichlids.several teleost species have evolved anterior extensions of the swim bladder which come close to or directly contact the inner ears. a few comparative studies have shown that these morphological specializations may enhance hearing abilities. this study investigates the diversity of swim bladder morphology in four asian and african cichlid species and analyzes how this diversity affects their hearing sensitivity.201222879934
lindane toxicity: histopathological, behavioural and biochemical changes in etroplus maculatus (bloch, 1795).the effects of sub-lethal concentrations of lindane on behavioral, hematological and histological parameters in etroplus maculatus were investigated. the lc₅₀ value of lindane for e. maculatus was estimated using the probit method and was found to be 0.028 mg/l. the red blood cell count (rbc) and the hemoglobin (hb), hematocrit (ht), mean corpuscular hemoglobin (mch), mean corpuscular volume (mcv) and mean corpuscular hemoglobin concentration (mchc) were significantly reduced (p > 0.0001) in fis ...201222115920
chromosome differentiation patterns during cichlid fish evolution.cichlid fishes have been the subject of increasing scientific interest because of their rapid adaptive radiation which has led to an extensive ecological diversity and their enormous importance to tropical and subtropical aquaculture. to increase our understanding of chromosome evolution among cichlid species, karyotypes of one asian, 22 african, and 30 south american cichlid species were investigated, and chromosomal data of the family was reviewed.201020550671
conservation of a satellite dna sequence (satb) in the tilapiine and haplochromine genome (pisces: cichlidae).we have cloned and sequenced a 1900-bp ecori fragment (satb) from the tilapiine fish oreochromis niloticus. the satb sequence is highly reiterated in the tilapiine genome and organized in long tandem arrays. a 760-bp hindiii fragment, an internal component of satb, has also been cloned and sequenced from the related tilapiine species oreochromis hornorum. hybridization of the radiolabelled 760-bp hindiii repeat detected the presence of the satb repeat in the genomes of several tilapiine species ...19938458567
[origins and consequences of aggression in etroplus maculatus (cichlidae, pisces). the problem of drive].increased aggressive activity between male and female in isolated pairs of etroplus maculatus has hitherto been explained either by the drive hypothesis or by the external stimulus hypothesis. in an attempt to investigate these two hypotheses the partners of 48 pairs were separated and their aggressiveness towards their mirrored images and their non-aggressive activities were recorded the following day and again 4 days later after 180 brief presentations of an adjacent compartment. for both sexe ...19751241830
the development of behavior in the cichlid fish etroplus maculatus (bloch). 19734799004
compensatory metabolic regulation to seasonal thermal stress in the tropical freshwater fish, etroplus maculatus (bleeker). 19715089318
visual pigments in a tropical freshwater fish etroplus maculatus (teleostei). 19676065817
some mechanisms underlying thermal acclimation in a freshwater fish, etroplus maculatus (teleostei). 19676051661
effects of prolonged starvation on the metabolism of fresh water fishes, etroplus maculatus and cirrhina reba. 19676030876
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