...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Effect of sexual maturation on the tissue biochemical composition of Octopus vulgaris and O-defflippi (Mollusca : Cephalopoda)
【24h】

Effect of sexual maturation on the tissue biochemical composition of Octopus vulgaris and O-defflippi (Mollusca : Cephalopoda)

机译：性成熟对寻常章鱼和O-defflippi（软体动物：头足纲）的组织生化成分的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Changes in the protein, lipid, glycogen, cholesterol and energy contents, total amino acid and fatty acid profiles of Octopus vulgaris and O. defilippi tissues (gonad, digestive gland and muscle) during sexual maturation (spermatogenesis and oogenesis) were investigated. Both species showed an increase of amino acids and protein content in the gonad throughout sexual maturation (namely in oogenesis), but allocation of these nitrogen compounds from the digestive gland and muscle was not evident. The major essential amino acids in the three tissues were leucine, lysine and arginine. The major non-essential amino acids were glutamic acid, aspartic acid and alanine. With respect to carbon compounds, a significant increasing trend (P<0.05) in the lipid and fatty acid contents in the three tissues was observed, and, consequently, there was also little evidence of accumulated lipid storage reserves being used for egg production. It seems that for egg production both Octopus species use energy directly from food, rather than from stored products. This direct acquisition model contrasts with the previous model for Octopus vulgaris proposed by O'Dor and Wells (1978: J Exp Biol 77:15-31). Most of saturated fatty acid content of the three tissues was presented as 16:0 and 18:0, monounsaturated fatty acid content as 18:1 and 20:1 and polyunsaturated fatty acid content as arachidonic acid (20:4n-6), eicosapentaenoic acid (20:5n-3) and docosahexaenoic acid (22:6n-3). Though cholesterol is an important precursor of steroid hormones, this sterol content exhibited variations that do not seem to be related with the maturation process. Moreover, significant differences (P<0.05) were obtained between genders, suggesting that perhaps there is a greater physiological demand for cholesterol during spermatogenesis than oogenesis. If the component sterols of octopus are of a dietary origin, considerable variation in the cholesterol content between species might be expected on the basis of the sterol composition of their prey. The glycogen reserves increased significantly in the gonad and decreased significantly (P<0.05) in the digestive gland and muscle of O. vulgaris (these trends were not evident in O. defilippi.). Glycogen may play an important role in the maturation process and embryogenesis of these organisms, because carbohydrates are precursors of metabolic intermediates in the production of energy. It was evident that sexual maturation had a significant effect upon the gonad energy content, but the non-significant energy variation (P>0.05) in the digestive gland and muscle revealed no evidence that storage reserves are transferred from tissue to tissue. The biochemical composition of digestive gland and muscle may not be influenced by sexual maturation, but rather by other biotic factors, such as feeding activity, food availability, spawning and brooding.
机译：研究了性成熟（精子发生和卵子发生）过程中章鱼和O. defilippi组织（性腺，消化腺和肌肉）的蛋白质，脂质，糖原，胆固醇和能量含量，总氨基酸和脂肪酸谱的变化。这两个物种在整个性成熟过程中（即在卵子发生过程中）都表现出性腺中氨基酸和蛋白质含量的增加，但是这些氮化合物在消化腺和肌肉中的分配并不明显。这三个组织中的主要必需氨基酸是亮氨酸，赖氨酸和精氨酸。主要的非必需氨基酸是谷氨酸，天冬氨酸和丙氨酸。对于碳化合物，在三个组织中的脂质和脂肪酸含量都有显着增加的趋势（P <0.05），因此，也几乎没有证据表明积累的脂质储藏储备可用于鸡蛋生产。似乎两种章鱼物种都直接从食物中而不是从存储的产品中产生能量来生产鸡蛋。这种直接获取模型与O'Dor和Wells（1978：J Exp Biol 77：15-31）提出的普通章鱼模型形成对比。三个组织的大多数饱和脂肪酸含量为16：0和18：0，单不饱和脂肪酸含量为18：1和20：1，多不饱和脂肪酸含量为花生四烯酸（20：4n-6），二十碳五烯酸（20：5n-3）和二十二碳六烯酸（22：6n-3）。尽管胆固醇是类固醇激素的重要前体，但这种固醇含量显示出与成熟过程无关的变化。此外，性别之间存在显着差异（P <0.05），这表明在精子发生过程中可能比生卵对胆固醇的生理需求更大。如果章鱼的成分固醇是饮食来源的，则根据其猎物的固醇成分，可能会在物种之间降低胆固醇含量。糖原储备在性腺中显着增加，而在普通麦草的消化腺和肌肉中则显着降低（P <0.05）（这些趋势在普通麦草中不明显）。糖原可能在这些生物的成熟过程和胚胎发生中起重要作用，因为碳水化合物是能量产生中代谢中间体的前体。显然，性成熟对性腺能量含量有显着影响，但消化腺和肌肉中能量的显着变化（P> 0.05）无明显迹象，表明没有证据表明储存储备在组织之间转移。消化腺和肌肉的生化组成可能不受性成熟的影响，而受其他生物因素的影响，例如摄食活动，食物供应，产卵和育雏。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号