178,160 research outputs found
Glorified Nine Patch quilt, by Vera LeBaron Finch
No full textImage of Glorified Nine Patch quilt created by Vera LeBaron Finch, date of creation unknown. Also includes questionnaires describing the quilt completed by Joanne C. Finch as part of the Utah Quilt Guild\u27s documentation days held from 1988-1994. Estimated date of fabric used in quilt: 1920
Telegram from Bertha Wells Mead, Washington, D. C., to Lucine Finch and Edwin W. Finch, Greenwich, Connecticut, September 29, 1926
No full textNotes and correspondence of sympathy written the Julia Neely Finch's family on her death
Letter from Bertha Wells Mead, Washington, D. C. , to Edwin Finch and Lucine Finch, September 30, 1926
No full textNotes and correspondence of sympathy written the Julia Neely Finch's family on her death
The visual field and visually guided behavior in the zebra finch (Taeniopygia guttata)
No full textBischof H-J. The visual field and visually guided behavior in the zebra finch (Taeniopygia guttata). Journal of Comparative Physiology, A: Sensory Neural and Behavioral Physiology. 1988;163(3):329-337.Measurements were made of the physical properties of the visual system of the zebra finch, a bird with laterally placed eyes. The use of the visual system in pecking and courtship behavior was examined. It was demonstrated that the optical axis and the fovea of the eye point in a direction about 62.degree. from the sagittal axis of the head. The visual field of each eye covers about 170.degree. in the horizontal plane. In the frontal region there is an overlap of about 30.degree.-40.degree. where the birds can see binocularly; caudally there is a 'gap' in the visual field of 60.degree.. The point of best binocular viewing is in the sagittal plane at 16.5.degree. below the beak. Concerning movement detection, the upper threshold is 540.degree./s for the binocular (frontal) part of the visual field and about 1100.degree./s for the monocular (lateral) part. Most fixations before pecking occur monocularly. A preference for one eye during pecking was not detected. During the courtship song, a male bird directs its head towards the female. The results are discussed in comparison with findings in pigeons and chickens
Atticus Finch, the biography Harper Lee, her father, and the making of an American icon
No full text"Who was the real Atticus Finch? The publication of Go Set a Watchman in 2015 forever changed how we think about Atticus Finch. Once seen as a paragon of decency, he was reduced to a small-town racist. How are we to understand this transformation? In Atticus Finch, historian Joseph Crespino draws on exclusive sources to reveal how Harper Lee's father provided the central inspiration for each of her books. A lawyer and newspaperman, A. C. Lee was a principled opponent of mob rule, yet he was also a racial paternalist. Harper Lee created the Atticus of Watchman out of the ambivalence she felt toward white southerners like him. But when a militant segregationist movement arose that mocked his values, she revised the character in To Kill a Mockingbird to defend her father and to remind the South of its best traditions. A story of family and literature amid the upheavals of the twentieth century, Atticus Finch is essential to understanding Harper Lee, her novels, and her times"..."One of the most famous characters in all of American culture, Atticus Finch has long been regarded as a touchstone of decency and goodness. But that changed with the 2015 publication of Lee's long-hidden manuscript Go Set a Watchman, in which Atticus is portrayed not as the heroic defender of a wrongly accused black man but as a small-town southern racist. Many have tried to piece together the "real" Atticus, and to determine how and why Harper Lee would have created two such seemingly different versions of the same character. The best way to understand Atticus, as the award-winning historian Joseph Crespino explains, is to examine the life of the flesh-and-blood man who inspired him: Harper Lee's father, Amasa Coleman (A. C.) Lee. In Atticus Finch, Crespino has unearthed a variety of new sources that show how Harper Lee's views were formed in tension with her father's, and how she used his example, even while smoothing over its rough edges, to create an enduring icon. From 1929 to 1947 A. C. Lee was the part-owner and sole editor of the lone newspaper in Monroeville, Alabama. On display in Lee's editorials were all the attributes commonly associated with Atticus: integrity, idealism, and a vigorous opposition to political demagoguery, whether that meant mob rule in Alabama or fascism in Hitler's Germany. Yet Lee was also a white southerner of his time and place, and his growing opposition to the New Deal and the emerging civil rights movement informed the character his daughter conceived in Watchman"..
Gene duplication and fragmentation in the zebra finch major histocompatibility complex
No full textBACKGROUND:
Due to its high polymorphism and importance for disease resistance, the major histocompatibility complex (MHC) has been an important focus of many vertebrate genome projects. Avian MHC organization is of particular interest because the chicken Gallus gallus, the avian species with the best characterized MHC, possesses a highly streamlined minimal essential MHC, which is linked to resistance against specific pathogens. It remains unclear the extent to which this organization describes the situation in other birds and whether it represents a derived or ancestral condition. The sequencing of the zebra finch Taeniopygia guttata genome, in combination with targeted bacterial artificial chromosome (BAC) sequencing, has allowed us to characterize an MHC from a highly divergent and diverse avian lineage, the passerines.
RESULTS:
The zebra finch MHC exhibits a complex structure and history involving gene duplication and fragmentation. The zebra finch MHC includes multiple Class I and Class II genes, some of which appear to be pseudogenes, and spans a much more extensive genomic region than the chicken MHC, as evidenced by the presence of MHC genes on each of seven BACs spanning 739 kb. Cytogenetic (FISH) evidence and the genome assembly itself place core MHC genes on as many as four chromosomes with TAP and Class I genes mapping to different chromosomes. MHC Class II regions are further characterized by high endogenous retroviral content. Lastly, we find strong evidence of selection acting on sites within passerine MHC Class I and Class II genes.
CONCLUSION:
The zebra finch MHC differs markedly from that of the chicken, the only other bird species with a complete genome sequence. The apparent lack of synteny between TAP and the expressed MHC Class I locus is in fact reminiscent of a pattern seen in some mammalian lineages and may represent convergent evolution. Our analyses of the zebra finch MHC suggest a complex history involving chromosomal fission, gene duplication and translocation in the history of the MHC in birds, and highlight striking differences in MHC structure and organization among avian lineages
Phase specific morphological changes induced by social experience in two forebrain areas of the zebra finch
No full textRollenhagen A, Bischof H-J. Phase specific morphological changes induced by social experience in two forebrain areas of the zebra finch. Behavioural Brain Research. 1994;65(1):83-88.We examined the changes of spine density in Golgi preparations of two different areas of the forebrain of the zebra finch, the ANC (Archi-Neostriatum caudale) and MNH (medial Neo-Hyperstriatum) during development, after transferring male birds from isolation to a social condition (exposure to a female for 1 week), and after a second isolation period. MNH and ANC are two of four brain regions which are strongly activated if a male bird is exposed to a female after some time of isolation. The results of our study can be summarized as follows. 1: a peak-decline trend is observed in ANC, but not in MNH. 2: rearing conditions do not affect the development of both areas until day 70. 3: from 80 days of age, isolation leads to reduced spine density within ANC, but to enhanced spine density within MNH. 4: short social contact after isolation diminishes or eliminates the effects of isolation by an enhancement of spine density in ANC and a reduction of spine density within MNH. 5: the effects of short social rearing after isolation are reversible within ANC, but not within MNH. We presume that the alterations of spine density, which are induced by changes in social conditions, are restricted to ages older than 70 days by hormonal factors. We propose that the complexity of the ANC neuronal net follows the complexity of the social environment, and that the level of arousal is the most important factor influencing the complexity. We further suppose that the reduction of spines within MNH is the anatomical manifestation of an imprinting process, which has been shown to occur in the same experimental situation as we used it in our study
Stabilization of sexual preferences by sexual experience in male zebra finches, taeniopygia guttata castanotis
No full textBischof H-J, Clayton N. Stabilization of sexual preferences by sexual experience in male zebra finches, taeniopygia guttata castanotis. Behaviour. 1991;118(1):144-154.Male zebra finches, Taeniopygia guttala castanotis, were normally-raised by zebra finches or were cross-fostered to Bengalese finch, Lonchura striata, foster-parents until 40 days of age. Following isolation until day 100, half the birds in each group were housed with a zebra finch female for seven days, isolated for three days and then housed with a Bengalese finch female for seven days. The other birds were exposed to females in the reverse order. Subsequent double-choice tests showed that all the normally-raised birds preferred zebra finch females whereas the preference of cross-fostered males depended on the order of exposure to the two females: those exposed first to a Bengalese finch female preferred Bengalese finch females whereas of those exposed first to a zebra finch female, some preferred zebra finches, some preferred Bengalese finches and some showed no marked preference for either female. In order to examine the question of why the latter group showed such markd individual variation in their sexual preferences, a further group of males were cross-fostered to Bengalese finches and exposed to a zebra finch female and then to a Bengalese finch female and their behaviors were observed from day 21 until day 40 and for the two, seven-day periods with the females. The results showed that, when comparing brothers within clutches, the one that begs and is fed more by its foster-parents develops a stronger preference for Benglese finch females and that the more song phrases a male directs to the zebra finch female during the first seven-day period, the stronger the sexual preference for zebra finch females in the double-choice tests. Hence, our results confirm and extend those of IMMELMANN et al. (1991) and KRUIJT and MEEUWISSEN (1991) that sexual imprinting may be a two step process. As a first step, information about the parents is learned during a sensitive period early in life. In a second step, this information has to be tested for its validity for the selection of a sexual partner during first courtship encounters. It is the second step where the previously stored information is stabilized in memory. Giving conflicting information during the first and the second step, one can show that interactions between the young male and its parents as well as with the first sexual partner influence the final preference it shows in subsequent double choice tests
Isolation-dependent enhancement of 14C-2-deoxyglucose uptake in the forebrain of zebra finch males
No full textBischof H-J, Herrmann K. Isolation-dependent enhancement of 14C-2-deoxyglucose uptake in the forebrain of zebra finch males. Behavioral and Neural Biology. 1988;49(3):386-397.In a previous study (H. J. Bischof and K. Herrmann (1986), Behavioral Brain Research, 21, 215-221) we demonstrated that four forebrain areas of the zebra finch male are activated in situations which arouse the animal, for example when the birds are chased around the cage or when they are exposed to a female. These areas, the hyperstriatum accessorium-dorsale (HAD), a part of the medial neo-hyperstriatum (MNH), the lateral neo-hyperstriatum (LNH), and a portion of the caudal archi-neostriatum (ANC), show enhanced 2-[14C]deoxyglucose (2-DG) uptake according to the experimental situation. On the basis of these experiments, we examined whether the activation of the areas is correlated with motor activity and is influenced by different isolation times prior to a 2-DG experiment, where courtship of the male birds is elicited by exposing them to a female zebra finch. For this purpose, we isolated male zebra finches for 1 day, 1 week, or 8 weeks, respectively, before we injected the 2-DG and exposed the birds to a female. During the experiment, besides other activities, the number of song motifs performed by the bird and the frequency of changing perches was recorded. Our experiments demonstrate that there is a weak negative correlation between motor activity and 2-DG uptake, and a positive correlation between isolation time and 2-DG uptake. We suggest that long isolation blocks courtship behavior by some unknown mechanisms, and that the "internal drive" of the animal, which possibly corresponds with the activity of the four forebrain areas, is enhanced by isolation and by the fact that the birds do not perform the consummatory behavior. Our results also demonstrate that the 2-DG method can show up small differences in the internal state of an animal, which cannot easily be detected by behavioral measurements
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