Publications

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acid phosphatase activity in the cerebellar cortex of the small brown dove, streptopelia senegalensis; spotted owlet, athene brama, and house-sparrow, passer domesticus. 19744417269
effect of ethanol on the hypertonic saline-induced histological changes in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck. 20144137633
stereometric observations on the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck, in total preparations.the configuration of the hns of the spotted owlet, athene brama temminck, was studied by employing the bulk-staining technique. this enabled a three-dimensional view of the hns. the neurons of the son are distributed into three divisions, namely, the preoptic, median and lateral. the pvn is u-shaped; the distal portion of the arms of the u extends laterally to form the lateral division of the pvn, which remains in continuity with the lateral division of the son. the periventricular division of t ...197555056
changes induced by formalin in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck.histological changes induced in the hns of the spotted owlet, athene brama temminck, by injection of 1 ml 5 or 10% formalin are described. no difference could be detected in the response of the hns to 5 or 10% formalin administration. in the hns of birds killed within 5 min of formalin administration, there was only partial depletion of nsm from the neurons, the tract and the nl; the quantity of nsm in the ame remained more or less unchanged. in animals killed 10-90 min after formalin injection, ...19751211093
sodium fluoride-induced changes in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck.administration of 10 or 20 mg of sodium fluoride (naf) induced depletion of neurosecretory material (nsm) from the neurons of the supraoptic (son) and paraventricular (pvn) nuclei in spotted owlet (athene brama temminck). the residual nsm in the perikarya was aranged in caplike paranuclear positions. the nsm in the hypothalamo-hypophysial tract, the zona externa of the anterior median eminence (me) and in the neural lobe (nl) showed only a partial lossmthe effects of naf administration on the hn ...19751079182
changes induced by morphine administration in the hypothalmic neurosecretory system of the spotted owlet, athene brama temminick.the effect of chronic administration of morphine, in gradually increasing doses, on the histology of the hns of the spotted owlet was investigated. administration of morphine in low doses (0.25-0.75 mg/day), for 9 days, induced marked depletion of nsm from all regions of the hns, except the zona externa of the ame. maximum depletion of nsm was noticed in the hns of birds treated with morphine for 9 days. beyond the 9th day, the hns did not exhibit further depletion of its nsm. administration of ...20161217861
hypothalamic neurosecretory system of the spotted owlet, athene brama temminck. 19761032080
histoenzymological studies on the distribution of certain phosphatases in the retinae of owlet (athene brama) and house sparrow (passer domesticus).a comparative study on the distribution of alkaline phosphatase (alp), acid phosphatase (acp) and 5'-nucleotidase (5-n) amongst the different constituents of retinae of owlet and house sparrow revealed some interesting aspects of the localization of such phosphatases in both the cases. the outer segment of photoreceptors, where light strikes first, are positive for all the phosphatases. further, areas composed of synapses, reveal activity of the three enzymes. another interesting aspect is relat ...19853013112
pineal gland of a nocturnal bird, indian spotted owlet, athene brama: morphological and endocrine observations.it has been reported that owls (strigiformes) do not have a pineal gland. however, our light microscopy study revealed an intermediate form of tubulofollicular and solid-type large pineal gland in a tropical owlet, athene brama. the epithelial cells forming follicles (6-8) in the distal region and the solid cluster of parenchymal cells of different diameters in the proximal region anteriorly tapered with a long cylindrical stalk and continued into commissural organs and choroid plexus. the intra ...200010900433
comparative view of pineal gland morphology of nocturnal and diurnal birds of tropical origin.although having a similar developmental pattern, the pineal gland of tropical birds varies in shape, size, and morphology, probably more than any other part of the avian brain. following the old classification, we noted a solid follicular (transitional) type of the pineal gland in the nocturnal bird athene brama, and a tubulo-follicular and elongated tubular types of pineal gland in diurnal birds perdicula asiatica and euroloncha punchulata, respectively. detailed light (lm) and electron microsc ...200111279667
time and reproductive phase-dependent effects of exogenous melatonin on the pineal gland and ovary of a nocturnal bird, the indian spotted owlet, athene brama.in a tropical nocturnal bird, the indian spotted owlet, athene brama, the intraperitonial injection of an identical amount (20 mg/100 g b. wt/day) of exogenous melatonin (mel) for 15 consecutive days increased the pineal weight and plasma mel level in sexually active birds while it decreased them in inactive birds more potently when injected in the evening (18.30-19.30 h) rather than the morning (0500-0600 h). on the other hand, more efficiently than the morning hour treatment, the evening hour ...200011291546
a reproductive phase-dependent effect of dietary l-tryptophan on pineal gland and gonad of a nocturnal bird, indian spotted owlet athene brama.unlike other temperate owls, indian spotted owlet athene brama possesses a well-developed pineal gland that secrets moderate amount of hydroxy- (serotonin) and methoxy- (melatonin) indoles in circulation. however, in this study, we have reported the response of this endocrine gland to exogenous l-tryptophan (precursor of the above indoles), and also its effect on gonads of this nocturnal bird. during breeding phase or pineal inactive phase (march), oral treatment of l-trp (0.5 mg/100 g bwt/day) ...200111396829
biometry based ageing of nestling indian spotted owlets ( athene brama brama).biometric analysis helps in sex differentiation, understanding development and for studies of avian biology such as foraging ecology, evolutionary ecology, and survivorship. we suggest that biometry can also be a reliable, practical and inexpensive tool to determine the age of nestlings in the field by non-invasive methods. as an example we studied the biometry of wing, culmen, talon, tarsus and body mass of nestling southern indian spotted owlets (athene brama brama). based on the growth patter ...201122140335
diversity of quill mites of the family syringophilidae (acari: prostigmata) parasitizing owls (aves: strigiformes) with remarks on the host-parasite relationships.the quill mite fauna of the family syringophilidae (acari: prostigmata: cheyletoidea) associated with owls (aves: strigiformes) is reviewed. a new genus is proposed, neobubophilus skoracki & unsoeld gen. nov. it differs from closely related bubophilus (bubophilus philips and norton, 1978) by the absence of leg setae vsii in the both sexes. in addition, four new species are described: (1) neobubophilus cunicularius skoracki & unsoeld sp. nov. from athene cunicularia (molina, 1782) (strigidae) fro ...201627220744
oxidative stress responses in relationship to persistent organic pollutant levels in feathers and blood of two predatory bird species from pakistan.to date, knowledge of persistent organic pollutant (pop) mediated oxidative stress responses in avian species is rather limited. we therefore investigated whether exposure to polybrominated diphenyl ethers (pbdes) and organochlorine pesticides (ocps) in two predatory bird species, namely black kite (milvus migrans) and spotted owlet (athene brama), was associated to activities of antioxidant enzymes, such as glutathione peroxidase (gpx), glutathione s-transferase (gst), glutathione reductase (gr ...201727939994
some species of centrorhynchus lühe, 1911 (acanthocephala: centrorhynchidae) from the collection of the natural history museum, london.seven species of centrorhynchus lühe, 1911 are present in the parasitic worms collection of the natural history museum, london: c. aluconis (müller, 1780) lühe, 1911 from strix aluco linnaeus in great britain; c. buteonis (schrank, 1788) kostylev, 1914 from accipiter virgatus (temminck) (new host record) in sri lanka (new geographical record); c. clitorideus (meyer, 1931) golvan, 1956 from athene brama (temminck) (new host record) in india; c. crotophagicola schmidt and neiland, 1966 (encysted j ...200516167121
killing of a pearl-spotted owlet (glaucidium perlatum) by male red colobus monkeys (procolobus tephrosceles) in a forest fragment near kibale national park, uganda.adult male red colobus (procolobus tephrosceles) were observed capturing and killing an owl (glaucidium perlatum) in the rurama forest fragment near kibale national park in western uganda. the owl was not subsequently eaten by the colobus, their conspecifics, or the other primates present during the attack. because the incident was preceded by an agonistic encounter with a raptor, the event is best interpreted as a misdirected antipredator behavior. although antipredator behaviors are not unknow ...200616892411
polychlorinated dibenzo-p-dioxins, dibenzofurans, and polychlorinated biphenyls in human tissues, meat, fish, and wildlife samples from india.concentrations of polychlorinated dibenzo-p-dioxins (pcdds), dibenzofurans (pcdfs), and non- and mono-ortho-substituted polychlorinated biphenyls (dioxin-like pcbs) were measured in tissues of humans, fishes, chicken, lamb, goat, predatory birds, and ganges river dolphins collected from various locations in india. pcdds/dfs were found in most of the samples analyzed with the liver of spotted owlet containing the highest concentration of 3,300 pg/g, fat wt. 2,3,7,8-substituted pcdds and pcdfs wer ...200111563645
failure of chloral hydrate to block the hypertonic saline-induced changes in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck. 19744464250
reserpine inhibition of hypertonic saline-induced changes in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck. 19744854125
inhibition by chlorpromazine of the hypertonic saline-induced changes in the hypothalamic neurosecretory system of the spotted owlet, athene brama temminck. 19744418147
do owls use torpor? winter thermoregulation in free-ranging pearl-spotted owlets and african scops-owls.numerous avian taxa use torpor, which involves pronounced reductions in body temperature (t(b)) to below normothermic levels. however, the occurrence of this phenomenon in owls (strigidae) remains largely unknown. we investigated winter patterns of thermoregulation in the crepuscular 80-g pearl-spotted owlet glaucidium perlatum and the strictly nocturnal 61-g african scops-owl otus senegalensis by obtaining telemetric measurements of skin temperature (t(skin)) from free-ranging individuals in th ...200919929636
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