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Variation in plasma concentration of insulin-like growth factor-1 and its covariation with liveweight in mice. 小鼠血浆胰岛素样生长因子-1浓度的变化及其与活重的共变。
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/bi9870287
H T Blair, S N McCutcheon, D D Mackenzie, P D Gluckman, J E Ormsby
{"title":"Variation in plasma concentration of insulin-like growth factor-1 and its covariation with liveweight in mice.","authors":"H T Blair,&nbsp;S N McCutcheon,&nbsp;D D Mackenzie,&nbsp;P D Gluckman,&nbsp;J E Ormsby","doi":"10.1071/bi9870287","DOIUrl":"https://doi.org/10.1071/bi9870287","url":null,"abstract":"<p><p>Three experiments were undertaken to examine the degree and causes of variation in plasma concentrations of insulin-like growth factor-1 (IGF-1) in mice. The relationship between IGF-1 concentrations and liveweight was also examined. In all three experiments, a number of non-genetic factors were found to contribute significantly to the variation in IGF-1 concentrations, the most important of these being sex and litter size. In one experiment, where pups from 16 litters were cross-fostered to avoid the confounding of maternal and direct genetic effects, a heritability of 0.40 +/- 0.27 was estimated for plasma IGF-1 concentration at 35 days of age. To examine further the existence of genetic variation in plasma concentrations of IGF-1 and the genetic covariation between plasma IGF-1 levels and other body traits, a selection experiment with mice has been initiated. Moderate to strong phenotypic correlations between IGF-1 concentrations and weight at an early age have been found in all three experiments.</p>","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14566882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
Blood Biochemical Polymorphisms in Rabbits Presently Bred in Spain: Genetic Variation and Distances amongst Populations 目前在西班牙饲养的兔子的血液生化多态性:种群间的遗传变异和距离
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870275
P. Zaragoza, A. Arana, I. Zarazaga, B. Amorena
{"title":"Blood Biochemical Polymorphisms in Rabbits Presently Bred in Spain: Genetic Variation and Distances amongst Populations","authors":"P. Zaragoza, A. Arana, I. Zarazaga, B. Amorena","doi":"10.1071/BI9870275","DOIUrl":"https://doi.org/10.1071/BI9870275","url":null,"abstract":"A total of 816 rabbits, belonging to breeds presently bred in Spain (Spanish Common, Spanish Giant, Butterfly, Lyone de Bourgogne, New Zealand White, Californian and a hybrid line obtained from crosses between selected individuals of the latter two), were tested using nine blood electrophoretic markers: Hb, Ak, Co, Tf, Es-l, Es-2, Es-3, Ada and Pgd. The latter five proteins were found polymorphic, each being controlled by one locus and showing autosomal co-dominant Mendelian inheritance. Three of these loci (Es-1, Es-2 and Pgd) have two alleles, and the remaining two (Es-3 and Ada) have three alleles. These polymorphic loci were used to study the population structure and breed similarities genetically.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78174522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey-headed fruit bat, pteropus poliocephalus 灰头果蝠精子发生(包括生殖细胞退化)和血浆睾酮浓度的季节变化
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870211
M. A. McGuckin, A. Blackshaw
{"title":"Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey-headed fruit bat, pteropus poliocephalus","authors":"M. A. McGuckin, A. Blackshaw","doi":"10.1071/BI9870211","DOIUrl":"https://doi.org/10.1071/BI9870211","url":null,"abstract":"Maximal testicular size of P. poliocephalus occurred during the February–March–April period (autumn breeding season) associated with maximal plasma levels of testosterone (121·5 ± 23·4 nmol/I). Testicular size decreased after the breeding season concomitant with a decrease in plasma testosterone (7·6 ± 1·7 nmol/I). Histologically, regressive changes were observed in the testis after the breeding season including a decrease in seminiferous tubule diameter and a decrease in Leydig cell nuclear diameter. Significant germ cell loss occurred during the breeding season (44%) mainly during the final spermatogonial division and meiosis and increased in regressed testes (69%), being accentuated chiefly at meiosis. All regressed testes showed some sperm production although it was much reduced after the breeding season; however, optimal fertility appears to be restricted to autumn by the large increases in testosterone secretion which only occur at this time.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74805001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Electrophoretic Resolution of Species Boundaries in Australian Microchiroptera. III. The Nycticeiini?Scotorepens and Scoteanax (Chiroptera : Vespertilionidae) 澳洲小翼目种界的电泳分辨。3Nycticeiini吗?雪蚤及雪蚤(翼翅目:雪蚤科)
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870417
P. Baverstock, M. Adams, T. Reardon, C. Watts
{"title":"Electrophoretic Resolution of Species Boundaries in Australian Microchiroptera. III. The Nycticeiini?Scotorepens and Scoteanax (Chiroptera : Vespertilionidae)","authors":"P. Baverstock, M. Adams, T. Reardon, C. Watts","doi":"10.1071/BI9870417","DOIUrl":"https://doi.org/10.1071/BI9870417","url":null,"abstract":"Two hundred and sixty two specimens of bats of the tribe Nycticeiini were sampled from throughout Australia, and their tissues subjected to aliozyme electrophoresis with a view towards delineating species boundaries. A total of 30 loci were resolved, detailed analysis of which revealed five species - greyii, sanborni, balstoni, orion and rueppellii. The specific boundaries recognized differ from ali previous treatments of Australian members, but are supported by the taxonomic arrangement proposed by Kitchener and Caputi (1985). The data also support separate generic recognition of rueppe/lii. Finally, the genetic data reveal a high level of population sub structuring in these bats.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82127325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Cycle of the Seminiferous Epithelium in the Grey-headed Fruit Bat, Pteropus poliocephalus 灰头果蝠精囊上皮的循环
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870203
M. A. McGuckin, A. Blackshaw
{"title":"Cycle of the Seminiferous Epithelium in the Grey-headed Fruit Bat, Pteropus poliocephalus","authors":"M. A. McGuckin, A. Blackshaw","doi":"10.1071/BI9870203","DOIUrl":"https://doi.org/10.1071/BI9870203","url":null,"abstract":"The seminiferous epithelial cycle of wild P. poliocephalus could be divided into eight stages on the basis of cellular associations and nuclear morphology. The relative frequencies of the stages (1–8) were, respectively: 15·8, 20·5, 9·4, 8·9, 11·1, 7·7, 9·8, and 16·8%. The duration of the cycle was determined by intratesticular injection of [Hlthymidine followed by autoradiography and estimated to be 16·0 days. The duration of meiotic prophase and spermiogenesis were both 23·3 days. Spermatocyte DNA synthesis appeared to occur in leptotene primary spermatocytes in stage 2. The duration of spermatogenesis is similar to that in man although the organization of the cycle resembles that of rodents.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80277279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Wool Proteins of New Zealand Romney Sheep 新西兰罗姆尼羊的羊毛蛋白
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870001
Woods Jl, Orwin Df
{"title":"Wool Proteins of New Zealand Romney Sheep","authors":"Woods Jl, Orwin Df","doi":"10.1071/BI9870001","DOIUrl":"https://doi.org/10.1071/BI9870001","url":null,"abstract":"Proteins extracted from the wool of 65 Romney ewes were analysed qualitatively by one- and twodimensional polyacrylamide gel electrophoresis. Romney wool proteins could be classified into the iow-sulfur, high-sulfur, and high-tyrosine protein groups described for wool from other breeds.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85849541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Stimulation of the hypothalamic-pituitary-adrenal axis and inhibition of growth hormone release via increased central noradrenaline neuronal activity by urethane anaesthesia in the rat: blockade by clonidine. 氨基甲酸乙酯麻醉对大鼠下丘脑-垂体-肾上腺轴的刺激和通过增加中枢去甲肾上腺素神经元活性抑制生长激素的释放:可定阻断。
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870091
G. Smythe, R. Gleeson, B. Stead
{"title":"Stimulation of the hypothalamic-pituitary-adrenal axis and inhibition of growth hormone release via increased central noradrenaline neuronal activity by urethane anaesthesia in the rat: blockade by clonidine.","authors":"G. Smythe, R. Gleeson, B. Stead","doi":"10.1071/BI9870091","DOIUrl":"https://doi.org/10.1071/BI9870091","url":null,"abstract":"Computerized gas chromatography-mass spectrometry was used to measure precisely the hypothalamic levels of noradrenaline (NA), dopamine and serotonin together with those of their major neuronal metabolites 3,4-dihydroxyphenylethyleneglycol (DHPG), 3,4-dihydroxyphenylacetic acid and 5-hydroxyindoleacetic acid in normal male rats 45 min after stimulation of hypothalamic-pituitary-adrenal function by urethane (1.3 g/kg) administration. Urethane treatment resulted in a significant elevation of central noradrenergic neuronal activity (NNA) as assessed from marked rises in hypothalamic DHPG concentrations and the ratio (DHPG/NA). At the same time there was significant stimulation of ACTH and corticosterone release and inhibition of growth hormone release. These hormonal and central effects of urethane (but not anesthesia) were inhibited when the alpha 2-agonist clonidine (150 micrograms/kg) was co-administered. Urethane had no major effect on hypothalamic dopamine or serotonin status. We propose that the release of ACTH and the suppression of growth hormone release following urethane anaesthesia is a result of activation of central NNA and suggest that the hormonal responses are mediated via hypothalamic noradrenergic facilitation of corticotrophin releasing factor and somatostatin release to the anterior pituitary.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87764083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Effects of exogenous growth hormone on milk production and nutrient uptake by muscle and mammary tissues of dairy cows in mid-lactation. 外源生长激素对泌乳中期奶牛产奶量及肌肉和乳腺组织营养吸收的影响
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/bi9870295
G H McDowell, J M Gooden, D Leenanuruksa, M Jois, A W English
{"title":"Effects of exogenous growth hormone on milk production and nutrient uptake by muscle and mammary tissues of dairy cows in mid-lactation.","authors":"G H McDowell,&nbsp;J M Gooden,&nbsp;D Leenanuruksa,&nbsp;M Jois,&nbsp;A W English","doi":"10.1071/bi9870295","DOIUrl":"https://doi.org/10.1071/bi9870295","url":null,"abstract":"<p><p>Responses to exogenous growth hormone were measured in lactating dairy cows surgically prepared to allow measurement of nutrient exchanges across mammary and hind-limb muscle tissues. Cows were injected daily with either saline or growth hormone, at a dose of 0.1 mg/kg liveweight, over periods of 6 days. During administration of growth hormone milk yield, milk fat content and yields of milk fat protein and lactose increased. Arterial plasma concentrations of glucose and non-esterified fatty acids were increased, uptake of glucose by leg muscle tissue decreased, lactate release from leg muscle tended to increase, mammary uptake of non-esterified fatty acids increased, blood flow to leg muscle tended to increase and blood flow to mammary tissue increased during injection of growth hormone. The results show that growth hormone affects supply to and utilization of key nutrients by tissues, resulting in the supply to the mammary gland of additional precursors for milk synthesis.</p>","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1071/bi9870295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14455137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 77
Preliminary studies of the complement fixation test to confirm the diagnosis of bovine ephemeral fever. 补体固定试验诊断牛短暂热的初步研究。
Australian journal of biological sciences Pub Date : 1987-01-01
W B Bai, F L Tian, C Wang, C L Jiang, Z G Zhang
{"title":"Preliminary studies of the complement fixation test to confirm the diagnosis of bovine ephemeral fever.","authors":"W B Bai,&nbsp;F L Tian,&nbsp;C Wang,&nbsp;C L Jiang,&nbsp;Z G Zhang","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A strain of bovine ephemeral fever (BEF) virus isolated in China in 1976 was adapted to growth in tissue cultures. A baby hamster kidney complement fixing (CF) antigen, stable at -20 degrees C for at least 120 days, was prepared from the BEF virus grown in tissue culture and used to test bovine sera for antibodies to that virus. CF antibodies were detected in all of 31 cattle after convalescence from experimental infection with BEF virus, in 208 (98%) of 213 cattle observed to have shown clinical ephemeral fever in an epidemic, in 96 cattle in these herds which did not show clinical signs of ephemeral fever and 16 cattle from herds in northern China outside the epidemic area. The CF antibodies to BEF virus were found to persist in 34 (89%) of 38 cattle which were bled 6 years after natural exposure to ephemeral fever. The CF antigen is economical to prepare and is suitable to differentiate ephemeral fever from other viral infections with which it could possibly be confused on clinical appearance.</p>","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14782939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Additive and Heterotic Genetic Effects in the Haplo-diploid Honeybee Apis Mellifera 单倍体-二倍体蜜蜂的加性和杂种优势遗传效应
Australian journal of biological sciences Pub Date : 1987-01-01 DOI: 10.1071/BI9870057
B. Oldroyd, C. Morán
{"title":"Additive and Heterotic Genetic Effects in the Haplo-diploid Honeybee Apis Mellifera","authors":"B. Oldroyd, C. Morán","doi":"10.1071/BI9870057","DOIUrl":"https://doi.org/10.1071/BI9870057","url":null,"abstract":"Nine lines of honeybees were used to form a 9 x 9 partial diallel cross. Hamuli number was determined for samples of worker offspring. One set of workers was reared in non-maternal colonies which had been made uniform, as far as possible, with respect to colony strength (number of workers), while another set was sampled directly from the combs of each maternal colony. Combining ability analysis of variance revealed significant additive and non-additive genetic effects for both sets of data, regardless of whether inbred parentals were included or excluded from the analysis. Uniform rearing removed average heterosis and reciprocal effects.","PeriodicalId":8573,"journal":{"name":"Australian journal of biological sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85289226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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