Cichlid fish
Altering an extended phenotype reduces intraspecific male aggression and can maintain diversity in cichlid fish
... on cichlid fish with different colour ...Malawi cichlid fish, in which males build sand-castles (bowers) to attract females during seasonal ...
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Acquisition of Lateralized Predation Behavior Associated with Development of Mouth Asymmetry in a Lake Tanganyika Scale-Eating Cichlid Fish.
... scale-eating cichlid fish in Lake Tanganyika, exhibits conspicuously lateralized predation behavior in ...prey fish; in righties, these char- acteristics are reversed ...various fish species ...
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Social odors conveying dominance and reproductive information induce rapid physiological and neuromolecular changes in a cichlid fish
... In cichlid fish, reproductive status influences the regulation of this neuropeptide and seasonal fluctuations of GnRH recep- tor levels in the brain can modulate olfactory processing, regulating the ...
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Social and reproductive physiology and behavior of the Neotropical cichlid fish Cichlasoma dimerus under laboratory conditions
... Physical interactions (Fig. 3) were generally preceded by threatening displays, especially during establishment of territories and social hierarchies. All these aggressive interactions resulted in a social hierarchy ...
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Influence of season and pollution on the antioxidant defenses of the cichlid fish acará (Geophagus brasiliensis)
... ity and reduced glutathione concentrations, with both parameters being significantly de- creased in relation to controls (Figure 2A,B). The induction of liver catalase activity in the acará exposed to pollutants may ...
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Chromosome differentiation patterns during cichlid fish evolution
... In addition to the standard cichlid karyotype pattern, large metacentric B chromosomes were observed at high frequency among specimens of H. obliquidens and M. lombardoi. One notable characteristic of the B ...
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Reproductive behavior and parental roles of the cichlid fish Laetacara araguaiae
... Laetacara araguaiae is a small cichlid species (Fig. 1) recently described from Araguaia drainage (Ottoni & Costa, 2009), but has been also collected in streams from upper Paraná River. It lives in marginal ...
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The B chromosome of the cichlid fish Haplochromis obliquidens harbors 18S rRNA genes
... Astatotilapia latifas- ciata has been reported to occur in Lake Nawampasa a small satellite lake of the much larger Lake Kyoga, and in Lake Kyoga located north of Lake Victoria in Uganda[r] ...
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Social modulation of sex steroid concentrations in the urine of male cichlid fish Oreochromis mossambicus
... We propose that the present study provides further evidence to the ‘‘challenge hypothesis.’’ O. mossambicus males were initially placed in isolation in order to pro- vide a baseline condition in which the endocrine ...
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The B chromosomes of the African cichlid fish Haplochromis obliquidens harbour 18S rRNA gene copies
... Among fish species, the large B chromosomes of Astyanax scabripinnis [34] and Alburnus alburnus [21] represent examples of isochromosome ...the cichlid chromosomes [53,54], the absence of clear visible SATA ...
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Parasitic infections in ornamental cichlid fish in the Peruvian Amazon
... The aim of this study was to evaluate the prevalence and seasonal distribution of the main parasite species in Amazonian ornamental cichlids that affect their trade. The study was conducted from August 2007 to September ...
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Water temperature affects aggressive interactions in a Neotropical cichlid fish
... the fish showed a loss of corporal ...group-housed fish, however, we observed that 66% of the replicates had at least one fish that died at a water temperature as low as 37° ...determine fish ...
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Evolutionary dynamics of rRNA gene clusters in cichlid fish
... of cichlid kar- yotypes has advanced after fluorescence in situ hybridization (FISH) technology was applied to the chromosomal physical mapping (cytogenetic mapping or FISH mapping) of DNA ...
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REPRODUCTIVE ECOLOGY OF A NEOTROPICAL CICHLID FISH, Cichla monoculus (Osteichthyes: Cichlidae)
... freshwater fish Cichla monoculus Spix, 1831 (Osteichthyes: Cichlidae) was investigated in the Campo Grande Reservoir, Northeast ...monthly. Fish collected on a monthly basis were measured, weighed, ...
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Apistogramma ortegai (Teleostei: Cichlidae), a new species of cichlid fish from the Ampyiacu River in the Peruvian Amazon basin
... American cichlid genus Apistogramma Regan (1913) comprises 84 valid species (Schindler & Staeck, 2013) distributed in the basins of the Amazon, Orinoco, Paraguay, lower Paraná and Uruguay, and coastal rivers ...
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Castration affects reproductive but not aggressive behavior in a cichlid fish
... Fish were anaesthetized and placed belly-up in a ‘‘V’’ shaped bed with an oral supply of dechlorinated and aerated water con- taining anaesthetic (150–200 ppm). A ventral mid-sagittal incision was made from the ...
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Visual communication stimulates reproduction in Nile tilapia, Oreochromis niloticus (L.)
... the cichlid fish species (11) and visual communication is an important part of their reproductive interaction ...the cichlid Nile tilapia, Oreochromis niloticus, the dominant male increases chasing ...
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Potential of fisheries restocking off the Algarve coast using aquaculture produced marine fish
... produced fish could have a negative genetic impact on the wild ...this fish will not have a negative effect on the wild ...of fish off this coast could have a positive impact at the local level since ...
180
Reproductive seasonality of Geophagus steindachneri Eigenmann Hildebrand, 1922 (Perciformes: Cichlidae) in a tropical mountain river
... The variation in the breeding patterns of tropical freshwater fishes has been explained with several hypotheses. Humphries et al. (1999) suggested that dry- season breeding in mountain rivers avoids floods that flush-out ...
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Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis
... An increase in hypoxic zones by stratification of water bodies, together with the increased oxygen demand from organisms due to an increase in metabolic rate, are some of the consequences of temperature change (Stramma ...
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