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  • 1
    Electronic Resource
    Electronic Resource
    Invited editorial comment: Study of minor anomalies in childhood malignancy (1985)
    Springer
    European journal of pediatrics 144 (1985), S. 250-251 
    Details
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00451952
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  • 2
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    Positive and Negative Experiences of Hospitalized Adolescents (1988)
    Roslyn Heights, N.Y. : Periodicals Archive Online (PAO)
    Adolescence. 23:89 (1988:Spring) 115 
    Details
    ISSN: 0001-8449
    Topics: Education , Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:c010-1988-023-89-000013
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  • 3
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    Psychosocial Research and the Hospitalized Adolescent: Approaches and Challenges (1988)
    Roslyn Heights, N.Y. : Periodicals Archive Online (PAO)
    Adolescence. 23:92 (1988:Winter) 925 
    Details
    ISSN: 0001-8449
    Topics: Education , Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:c010-1988-023-92-000017
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  • 4
    Electronic Resource
    Electronic Resource
    Vaginal Infections and Prematurity (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Birth 14 (1987), S. 0 
    Details
    ISSN: 1523-536X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: : This is a review of four vaginal and cervical infections that may be associated with prematurity, premature rupture of the membranes, or low birthweight. Urea-plasma urealyticum, group B streptococcus, Chlamydia trachomatis, and anaerobic vaginosis are discussed, along with other data regarding intrauterine infection as a cause of prematurity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1523-536X.1987.tb01460.x
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  • 5
    Electronic Resource
    Electronic Resource
    Primary Culture of Mouse Endometrium on Floating Collagen Gels: A Potential in Vitro Model for Implantation (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 476 (1986), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1986.tb20924.x
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of larval host on life history traits of the mediterranean fruit fly, Ceratitis capitata (1987)
    Springer
    Oecologia 73 (1987), S. 583-590 
    Details
    ISSN: 1432-1939
    Keywords: Mediterranean fruit fly ; Ceratitis capitata ; Insect demography ; Insect polyphagy ; Insect-host relations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Demographic parameters for the Mediterranean fruit fly reared on each of twenty four different hosts from sixteen different plant families are reported. These include cohort parameters of development, survival, pupal sizc, and fecundity as well as population parameters such as intrinsic rate of population increase (r) and mean generation time. Major findings include the following: i) no consistent quantitative relationships existed between r and its chief demographic determinants such as preadult developmental time and adult fecundity; and ii) few correlations existed among the cohort life history parameters themselves. The principle conclusion is that the medfly is a successful generalist frugivore because of its developmental ability to offset the effect of the value for a host-specific trait that tends to lower r with one that tends to increase r, the net result of which is to maintain a relatively high r.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379420
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  • 7
    Electronic Resource
    Electronic Resource
    Maternal heterogeneity in primary sex-ratio of three tetranychid mites (1988)
    Springer
    Experimental and applied acarology 5 (1988), S. 151-162 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of maternal age on primary sex ratio was determined forTetranychus urticae, T. pacificus andT. turkestani (Acari:Tetranychidae). All females were allowed to mate once.Tetranychus urticae had the highest production of daughters and the lowest production of sons. The sex ratio ofT. urticae was nearly 2∶1 (daughters∶sons), whereas for the other species it was 0.6∶1. Net sex ratios were all shifted in favor of daughters, suggesting that most son-production occurs late in life. Demographic techniques are applied to tetranychid populations, including the concepts of reproductive concentration curves and expectation of future reproduction based on age and previous offspring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02053824
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  • 8
    Electronic Resource
    Electronic Resource
    Age and host effects on clutch size in the Mexican fruit fly, Anastrepha ludens (1988)
    Springer
    Entomologia experimentalis et applicata 47 (1988), S. 73-80 
    Details
    ISSN: 1570-7458
    Keywords: Tephritidae ; Mexican fruit fly ; Anastrepha ludens ; clutch size ; host selection ; insect demography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'examen a porté sur l'influence du polymorphisme et des modifications dues à l'âge des mouches sur la fécondité et la taille des pontes de A. ludens Loew (Dipt. Tephritidae). L'étude a concerné aussi l'influence de la dimension, de la couleur et de la densité des hôtes sur la taille des pontes. Des mouches isolées ou par groupes ont reçu des hôtes artificiels formés de sphères d'agar enveloppées dans du parafilm. La fécondité brute de femelles isolées a été de 1000 oeufs/femelle et de 165 pontes/femelle, avec une variation de 1 à 40 oeufs/ponte. La taille moyenne des pontes des différentes femelles isolées s'étalait de 4,5 à 10,6 oeufs/ponte. Le nombre d'oeufs/ponte des femelles groupées était fortement liée à la dimension de l'hôte, s'étalant de 4,4 oeufs/ponte pour des hôtes de 2 cm de diamètre à 12,7 oeufs/ponte pour ceux de 11 cm de diamètre. Ni la couleur et la densité des hôtes, ni la densité et l'âge des mouches n'ont influé sur la taille des pontes. Ces résultats suggèrent que les variabilités du comportement des femelles et de la dimension des hôtes déterminent par priorité la taille des pontes de A. ludens.
    Notes: Abstract We document individual and age-specific variation in reproductive output and clutch size of Anastrepha ludens Loew. (Diptera: Tephritidae). The influence of host size, color, and density on clutch size are also examined. Individual and groups of flies were offered artificial hosts composed of agar spheres wrapped in Parafilm. The gross reproduction rate of individual flies was 1000 eggs/female and 165 clutches/female with a range of 1 to 40 eggs/clutch. Mean clutch sizes for these females ranged from 4.5 to 10.6 eggs/clutch. The number of eggs/clutch laid by females held in groups was highly correlated with host size, ranging from about 4.4 eggs/clutch in 2 cm diameter hosts to 12.7 eggs/clutch in 11 cm hosts. Host color, host density, fly density, and fly age did not affect clutch size. This study suggests that variation among females and host size are the principal determinants of clutch size in A. ludens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186718
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  • 9
    Electronic Resource
    Electronic Resource
    Reproductive limits and heterogeneity of male twospotted spider mites (1989)
    Springer
    Entomologia experimentalis et applicata 50 (1989), S. 209-214 
    Details
    ISSN: 1570-7458
    Keywords: Demography ; male population biology ; sex ratio ; Tetranychus urticae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé La reproduction est un processus qui nécessite généralement un mâle et une femelle. Cependant la biologie des populations ne s'est traditionnellement intéressée qu'à la contribution des femelles dans ce processus. Un effet de cet accent sur les femelles est que l'activité reproductrice des mâles a été très ignorée. Cet article examine, dans un contexte démographique, l'activité reproductrice des mâles de T. urticae, acarien arrhénotoque et phytophage. Trois séquences de l'activité reproductrice des mâles ont été examinées: 1) la copulation, 2) l'insémination, 3) la reproduction. En moyenne un mâle de 1 jour a copulé 15 fois, inséminé 15 femelles et a eu 336 filles. Pendant les 8 premiers jours, le mâle moyen a inséminé 70 femelles et a eu 1145 filles. Ces résultats suggèrent que le nombre de spermatozoïdes transférés à chaque insémination, plus que le nombre d'inséminations, est le facteur limitant d'une forte contribution du mâle à la reproduction.
    Notes: Abstract This paper determines reproductive limits and variation in performance of male twospotted spider mites Tetranychus urticae Koch when virgin females are provided ad libitum over the first eight days of adult life. Theree phases of male reproduction were studied: copulations, insemination and reproduction. An average one day old male copulated 15 times, inseminated 15 females, and contributed to 336 daughters. All parameters declined with age. The average male inseminated 70 females and contributed to 1145 daughters in the first days. Variability between males was small for all parameters considered. These data suggest that the number of sperm transferred at each insemination, rather than the number of inseminations, is the limiting step to higher male reproductive output.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341169
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  • 10
    Electronic Resource
    Electronic Resource
    Demography of a native strain of the melon fly, Dacus cucurbitae, from Hawaii (1985)
    Springer
    Entomologia experimentalis et applicata 38 (1985), S. 195-199 
    Details
    ISSN: 1570-7458
    Keywords: melon fly ; Dacus cucurbitae ; demography ; life tables ; host studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Le développement préimaginal et les taux de survie d'une souche sauvage de D. cucurbitae de Hawaí sur six hôtes courants ont été examinés à 25°C. Ces résultats ont été combinés aux informations récoltées sur la survie des adultes, la fécondité et la fertilité pour réaliser des tables de vie. La durée du stade oeuf est légèrement supérieure à un jour pour cette espèce. La durée de développement de l'éclosion de l'oeuf à l'imago et les taux de survie ont été respectivement de 17 à 20 jours et de 35 à 85% suivant les hôtes. La fécondité brute (ponte totale) a été de 1293 oeufs par femelle, tandis qui ‘la fertilité’ (nombre total d'oeufs fertiles pondéré par les taux d'éclosion et de survie des adultes) était de 518 oeufs fertiles par femelle. Le taux d'accroissement (λ) variait de 1,08 à 1,12 suivant l'hôte sur lequel D. cucurbitae a été élevé. La proportion d'adultes dans une distribution en âge stable était d'environ 14% sur tous les hôtes.
    Notes: Abstract Preadult development and survival rates for a wild strain of melon fly in Hawaii were examined when reared on six common hosts at 25°C. These data were combined with information gathered on adult survival, fecundity and fertility in order to construct life tables. The duration of the egg stage was slightly over 1 day for this species. Depending on host, larval-to-adult development and survival rates were 17–20 days and 35–85%, respectively. Gross fecundity (total eggs) was 1293 eggs/♀ while net fertility (total fertile eggs weighted by hatch and adult survival) was 518 fertile eggs/♀. The finite rate of increase (λ) for the species was conditional on the host on which it was reared and ranged from 1.08 to 1.12. The percent of adults in the stable age distribution averaged around 14% over all hosts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00361932
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