| the neonicotinoid pesticide imidacloprid and the dithiocarbamate fungicide mancozeb disrupt the pituitary-thyroid axis of a wildlife bird. | thyroid is an important homeostatic regulator of metabolic activities as well as endocrine mechanisms including those of reproduction. present investigation elucidated the thyroid disrupting potential of a neonicotinoid imidacloprid and a dithiocarbamate mancozeb in a seasonally breeding wildlife bird, red munia (amandava amandava) who is vulnerable to these two pesticides through diet (seed grains and small insects). adult male birds were exposed to 0.5% ld50 mgkg(-1)bwd(-1) of both the pestici ... | 2015 | 25496744 |
| can establishment success be determined through demographic parameters? a case study on five introduced bird species. | the dominant criterion to determine when an introduced species is established relies on the maintenance of a self-sustaining population in the area of introduction, i.e. on the viability of the population from a demographic perspective. there is however a paucity of demographic studies on introduced species, and establishment success is thus generally determined by expert opinion without undertaking population viability analyses (pvas). by means of an intensive five year capture-recapture monito ... | 2014 | 25333743 |
| prevalence and population structure of lice (phthiraptera) on the indian red avadavat. | prevalences of two phthirapteran species (an ischnoceran, brueelia amandavae, and an amblyceran, myrsidea amandava) on 130 red avadavats (amandava amandava) were 36.2 and 20.8% in the district of rampur, india, from september to december 2004. sample mean abundances of the two species were 3.43 and 1.53, respectively. the frequency distribution patterns of both species were aggregated. the observed distribution conformed to the expected distribution of the negative binomial model, but only in th ... | 2007 | 17867828 |
| the evolution of carotenoid coloration in estrildid finches: a biochemical analysis. | the estrildid finches (aves: passeriformes: estrildidae) of africa, asia, and australia have been the focus of several recent tests of sexual selection theory. many estrildids display bright red, orange, or yellow colors in the beak or plumage, which typically are generated by the presence of carotenoid pigments. in this study, we used high-performance liquid chromatography to investigate the carotenoid content of feathers and other colorful tissues in seven species of estrildids. star finches ( ... | 2004 | 15364287 |
| plumage in lal munia (amandava amandava). | an indian ploceid finch, amandava amandava, develops brilliant nuptial plumage in males during the breeding season. the females and males outside of the breeding season have modest brown hen plumages. the fact that castrates, whether originally of male or of female sex, assume nuptial plumages during the breeding season of the species indicates that plumage character is under the control of hypophyseal hormones and that hypophyses are passing through an activity cycle which is independent of pre ... | 1961 | 17795287 |
| endocrine disrupting pesticides impair the neuroendocrine regulation of reproductive behaviors and secondary sexual characters of red munia (amandava amandava). | the exposure effects of two endocrine disrupting pesticides (edps), mancozeb/mcz and imidacloprid/imi of the group dithiocarbamate and neonicotinoid respectively, on reproductive behaviors and secondary sexual characters have been studied in a seasonally breeding wildlife bird, red munia (amandava amandava). adult male birds were exposed to both the pesticides individually (0.25% ld50 of each) as well as co-exposed (mix-i: 0.25% ld50 of each and mix-ii: 0.5% ld50 of each) through food for 30d in ... | 2017 | 28119157 |
| disruption of the hypothalamic-pituitary-thyroid axis on co-exposures to dithiocarbamate and neonicotinoid pesticides: study in a wildlife bird, amandava amandava. | non-target organisms, including human and wildlife, are susceptible to deleterious effects of pesticide mixtures in their environment. present study demonstrated the disruption of the hypothalamic-pituitary-thyroid (hpt) axis in a seasonally breeding wildlife bird amandava amandava on co-exposure to dithiocarbamate mancozeb/mcz and neonicotinoid imidacloprid/imi, at concentrations even lower than respective environmentally realistic exposure level of each of the pesticide. adult male birds (n=8/ ... | 2017 | 28237669 |
| a paramyxovirus of serotype 3 isolated from african and australian finches. | two virus isolates were obtained from exotic finches (ortygospiza atricollis and poephila cincta) suffering from apathy, diarrhea, conjunctivitis, and dysphagia. the isolates were identified as paramyxoviruses based on their multiplication characteristics in embryonating chicken eggs, chicken embryo fibroblasts, and chicken embryo kidney cell cultures, on morphology upon electron microscopy, and on other biological properties. both isolates were serologically related to the reference strain of t ... | 1987 | 3442546 |
| thyroid disrupting pesticides impair the hypothalamic-pituitary-testicular axis of a wildlife bird, amandava amandava. | the effect of two thyroid disrupting pesticides (tdps) mancozeb (mcz) and imidacloprid (imi) on the hypothalamic-pituitary-gonadal/testicular (hpg) axis of a seasonally breeding bird, amandava amandava has been evaluated. male birds (n=8/group) were exposed to each of the pesticide (0.25% ld50 of respective pesticide) as well as to their two equimixture doses (0.25% of ld50 of each and 0.5% ld50 of each) through food for 30d during pre-breeding stage of the reproductive cycle. reduction in weigh ... | 2017 | 28431984 |