| an intron loss of dfak gene in species of the drosophila melanogaster subgroup and phylogenetic analysis. | drosophila focal adhesion kinase (dfak) gene is a single-copy nuclear gene. previous study revealed that drosophila melanogaster and drosophila simulans had lost an intron precisely within the tyrosine kinase (tyk) domain of this gene. however, this did not happen in several other drosophila species, including drosophila elegans, drosophila ficusphila, drosophila biarmipes, drosophila jambulina, drosophila prostipennis, drosophila takahashii, and drosophila pseudoobscura. in the current study, h ... | 2009 | 18310070 |
| eclosion behaviour of three species of drosophila under different light regimes. | the daily patterning of animal behaviour is presumed to be due to changes in responsiveness to external stimuli, as a function of varying internal states which may be oscillating with a 24 h period. the endogenous circadian system functions to organize behaviour and physiology to adapt to and anticipate environmental changes in light, temperature, food and mate availability. light is most important zeitgeber that influence circadian physiology of several insects. the present study is an attempt ... | 2012 | 23140025 |
| nocturnal illumination dimmer than starlight altered the circadian rhythm of adult locomotor activity of a fruit fly. | the effects of nocturnal irradiance tenfold dimmer than starlight intensity on the locomotor activity rhythm of drosophila jambulina were investigated in two types of light-dark (12 h:12 h) cycles, in which light intensity of the photophase was 10 lux while that of the scotophase was either 0 lux for control flies or 0.0006 lux for experimental flies. activity onset in the experimental flies was approximately 5.4 h prior to lights-on, so it occurred around midnight. however, activity onset of th ... | 2010 | 20205559 |
| light at night alters the parameters of the eclosion rhythm in a tropical fruit fly, drosophila jambulina. | we investigated the effects of natural light at night (lan) in the field and artificial lan in the laboratory on the circadian rhythm of pupal eclosion in a tropical wild type strain of drosophila jambulina captured at galle, sri lanka (6.1(o)n, 80.2(o)e). the influence of natural lan, varying in intensity from 0.004 lux (starlight intensity) to 0.45 lux (moonlight intensity), on the entrainment pattern of the circadian rhythm of eclosion at 25(o) +/- 0.5(o)c was examined by subjecting the mixed ... | 2009 | 20030541 |
| varying the length of dim nocturnal illumination differentially affects the pacemaker controlling the locomotor activity rhythm of drosophila jambulina. | photic entrainment of animals in the field is basically attributed to their exposure to the dimly lit nights flanked by the dawn and dusk twilight transitions. this implicates the functional significance of the dimly lit nights as that of the twilight transitions. recently, the authors have demonstrated that the dimly lit night at 0.0006 lux altered the attributes of the circadian rhythm of locomotor activity of drosophila jambulina. the present study examined whether the durations of such dimly ... | 2011 | 21721854 |
| seasonal changes in humidity level in the tropics impact body color polymorphism and desiccation resistance in drosophila jambulina-evidence for melanism-desiccation hypothesis. | drosophila jambulina exhibits color dimorphism controlled by a single locus but its ecological significance is not clear. dark and light morphs differ significantly in body melanisation, desiccation resistance, rate of water loss, mating activity and fecundity. interestingly, this species lacks clinal variation for body size, desiccation resistance and life history traits. for body melanisation, lack of geographical variation as well as plastic effects is not in agreement with a thermal melanism ... | 2009 | 19200435 |
| mutations for activity level in drosophila jambulina perturbed its pacemaker that controls circadian eclosion rhythm. | mutations for activity level, designated hpa and hra, in drosophila jambulina altered properties of the pacemaker controlling eclosion rhythm. entrainment of eclosion rhythm was studied in light-dark (ld) cycles of 12:12 h at 28 degrees c. the wild type strain entrained to ld cycles but the hpa or hra strain did not. when these strains were released from constant light (ll) to constant darkness (dd), the wild type strain free-ran while other two strains were arrhythmic. temperature cycles entrai ... | 2002 | 12046623 |
| selection for activity level alters the properties of the circadian pacemaker in drosophila jambulina. | | 1999 | 10360270 |