Basic study on the improvement of animal production in the tropics, especially on the reproductive problems under heat stress conditions

热带动物生产改善的基础研究,特别是热应激条件下的繁殖问题

基本信息

  • 批准号:
    04454104
  • 负责人:
  • 金额:
    $ 1.34万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
  • 财政年份:
    1992
  • 资助国家:
    日本
  • 起止时间:
    1992 至 1994
  • 项目状态:
    已结题

项目摘要

Heat stress suppresses the reproductive performance of animals and thereby reduces productivity in the tropics. In the present study, 1) the mechanisms of hypogonadism under heat stress conditions were analyzed in relation to neuroendocrine functions of the hypothalamo-pituitary-gonadal axis, and 2) heat tolerance of buffaloes was compared with cattle in terms of thermo-regulatory responses aiming at the efficient use of buffaloes in future. The results obtained were summarized as follows :1. Pituitary gonadotropin secretions were not suppressed by heat stress in ovariectomized goats in which ovarian steroidal milieu were maintained at constant levels by steroid implants. Hypothalamic GnRH pulse generator activity, as recorded by a electrophysiological method, also showed no apparent influence of heat stress, although a number of animals used was small. From these results, it was assumed that hypogonadism under heat stress conditions is not attributed to the decrease of neuroendocrine … More functions of hypothalamus and pituitary.2. Ovarian responses, as determined by the increase of plasma estradiol concentration and ovulation, were significantly suppressed under heat stress conditions, when the pulsatile LH secretion was maintained by hourly injection of GnRH in anestrous animals. From these results, a poor responsiveness of the ovary was considered as a possible cause of hypogonadism under heat stress conditions.3. Ovarian blood flow, as measured by the ultrasound transit-time flow meter, was not influenced by heat stress and therefore a possibility of the reduced blood supply to the ovary was ruled out.4. In the comparative study of heat tolerance of buffaloes and cattle, it was shown that heat dissipation in buffaloes was much depended on sensitive heat loss from body surface rather than insensible heat loss by evaporation through sweating and respiration compared with cattle.5. In buffaloes, a rapid increase of blood volume occurred under hot conditions, and this resulted in an increase of blood flow to the skin and contributed to an increased heat dissipation from body surface. Less
热应激抑制动物的繁殖能力,从而降低热带地区的生产力。本研究从下丘脑-垂体-性腺轴神经内分泌功能的角度分析了热应激条件下水牛性腺功能减退的机制,并从温度调节反应的角度比较了水牛和黄牛的耐热性,以期为今后水牛的有效利用提供参考。主要研究结果如下:1.在卵巢切除山羊中,卵巢类固醇环境通过类固醇植入物维持在恒定水平,热应激不会抑制卵巢促性腺激素分泌。下丘脑GnRH脉冲发生器的活动,通过电生理学方法记录,也没有表现出明显的热应激的影响,虽然使用的动物数量很少。根据这些结果,推测热应激条件下的性腺功能减退不是由于神经内分泌的减少, ...更多信息 下丘脑和垂体的功能。在热应激条件下,通过每小时注射GnRH维持LH的脉冲式分泌,可显著抑制卵巢的反应(通过血浆雌二醇浓度的增加和排卵来确定)。从这些结果来看,卵巢反应性差被认为是热应激条件下性腺功能减退的可能原因。卵巢血流量,如超声渡越时间流量计所测量的,不受热应激的影响,因此排除了卵巢血供减少的可能性.通过对水牛和黄牛耐热性的比较研究发现,水牛的散热主要依靠体表的显热损失,而不是通过出汗和呼吸等方式蒸发的非显热损失.在水牛中,在热的条件下发生的血容量的快速增加,这导致增加的血液流向皮肤,并有助于增加从体表散热。少

项目成果

期刊论文数量(28)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Yukio KANAI: "Hypogonadism in heat stressed goats: poor responsiveness of the ovary to the pulsatile LH stimulation induced by hourly injections of a small dose of GnRH" J.Reprod.Gev.(Accepted). (1995)
Yukio KANAI:“热应激山羊性腺功能减退症:卵巢对每小时注射小剂量 GnRH 引起的脉动 LH 刺激的反应性差”J.Reprod.Gev.(已接受)。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
KANAI, Y.: "Heat tolerance of buffaloes:a comparison with cattle In:Long-term Genetic Improvement of the Buffalo" P.Bunyavejchewin,C.Chantarakuhana and Sangdid Buffalo and Beef Production and Research Center,Kasetsart University,Bangkok,Thailand, 226
KANAI, Y.:“水牛的耐热性:与牛的比较:水牛的长期遗传改良” P.Bunyavejchewin、C.Chantarakuhana 和 Sangdid 水牛和牛肉生产研究中心,农业大学,曼谷,泰国,
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Yukio KANAI: "Heat tolerance of buffaloes:a comparison with cattle" Proc.Ist Asian Buffalo Association Congress. 1. 183-194 (1994)
Yukio KANAI:“水牛的耐热性:与牛的比较”Proc.Ist 亚洲水牛协会大会。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Kanai, Y.et al.: "Electrophysiological recording of hypothalamic GnRH pulse generator activity in castrated male goats" J.Reprod.Dev.41. 57-62 (1995)
Kanai, Y.等人:“去势雄性山羊下丘脑 GnRH 脉冲发生器活动的电生理记录”J.Reprod.Dev.41。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
Yukio KANAI: "Hypogonadism under heat stress conditions-poor responsiveness of the ovary to gonadotropin in heat stressed goats" Proc.6th AAAP Animal Science Congress. 3. 220 (1992)
Yukio KANAI:“热应激条件下性腺功能减退——热应激山羊卵巢对促性腺激素的反应性差”Proc.6th AAAP 动物科学大会。
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
  • 作者:
  • 通讯作者:
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

KANAI Yukio其他文献

KANAI Yukio的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('KANAI Yukio', 18)}}的其他基金

Field surveys on tamaraw, a critically endangered animal, to estimate its population size and habitat behavior
对极度濒危动物柽柳进行实地调查,以估计其种群规模和栖息地行为
  • 批准号:
    17405040
  • 财政年份:
    2005
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Studies on the evaluation of productive traits and its efficient use in buffaloes
水牛生产性状评价及其高效利用研究
  • 批准号:
    15380184
  • 财政年份:
    2003
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Comparative studies on the evaluation of productive traits and its efficient use in buffaloes
水牛生产性状评价及其高效利用的比较研究
  • 批准号:
    12460118
  • 财政年份:
    2000
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Anoestrus in Farm Animals under Hot Environments.
炎热环境下农场动物的不发情。
  • 批准号:
    61560294
  • 财政年份:
    1986
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

Phase 2 Kp-10 in Patients with Hypogonadotropic Hypogonadism
低促性腺激素性性腺功能减退症患者的 2 期 Kp-10
  • 批准号:
    10730209
  • 财政年份:
    2023
  • 资助金额:
    $ 1.34万
  • 项目类别:
Characterizing the genetic etiology of delayed puberty with integrative genomic techniques
利用综合基因组技术表征青春期延迟的遗传病因
  • 批准号:
    10663605
  • 财政年份:
    2023
  • 资助金额:
    $ 1.34万
  • 项目类别:
Estradiol treatment of stress-related psychiatric disorders in Veterans
雌二醇治疗退伍军人压力相关精神疾病
  • 批准号:
    10484783
  • 财政年份:
    2023
  • 资助金额:
    $ 1.34万
  • 项目类别:
Development of a patient-derived tumoroid culture system to explore novel medical treatments for refractory prolactinomas
开发患者源性肿瘤培养系统,探索难治性泌乳素瘤的新疗法
  • 批准号:
    10643450
  • 财政年份:
    2023
  • 资助金额:
    $ 1.34万
  • 项目类别:
Poly(pro-Estrogen) Microneedle Patches
聚(雌激素原)微针贴片
  • 批准号:
    10647375
  • 财政年份:
    2023
  • 资助金额:
    $ 1.34万
  • 项目类别:
Elucidation of the mechanisms by which cells recognize and respond to different levels of androgens
阐明细胞识别和响应不同水平雄激素的机制
  • 批准号:
    10418461
  • 财政年份:
    2022
  • 资助金额:
    $ 1.34万
  • 项目类别:
Role of Testosterone Induction of Hydrogen Sulfide in Erectile Dysfunction
硫化氢睾酮诱导在勃起功能障碍中的作用
  • 批准号:
    10549752
  • 财政年份:
    2022
  • 资助金额:
    $ 1.34万
  • 项目类别:
Astrocyte insulin resistance-induced neuroendocrine defects in pubertal delay and hypogonadotropic hypogonadism
星形胶质细胞胰岛素抵抗诱导青春期延迟和低促性腺激素性性腺功能减退症的神经内分泌缺陷
  • 批准号:
    10392144
  • 财政年份:
    2022
  • 资助金额:
    $ 1.34万
  • 项目类别:
Role of Testosterone Induction of Hydrogen Sulfide in Erectile Dysfunction
硫化氢睾酮诱导在勃起功能障碍中的作用
  • 批准号:
    10735008
  • 财政年份:
    2022
  • 资助金额:
    $ 1.34万
  • 项目类别:
Characterization of Kiss1 neurons as mediators of the reproductive regulation of energy balance
Kiss1 神经元作为能量平衡生殖调节介质的表征
  • 批准号:
    10682484
  • 财政年份:
    2022
  • 资助金额:
    $ 1.34万
  • 项目类别:
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了