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Search Results: 1 - 10 of 288643 matches for " 张永普 "
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小荚蛏肉营养成分的分析及评价

动物学杂志 , 2002,
Abstract:
不同地理种群泥蚶的形态差异与判别分析

水产学报 , 2004,
Abstract: 泥蚶(tegillarcagranosalinnaeus)为印度椢魈洋海域的广温广盐性贝类,在我国主要分布于山东以南沿海,是我国沿海滩涂的主要经济养殖贝类.有关泥蚶人工育苗、繁殖与生长和生理生化等方面的研究已有较多报道[1-9],但种内形态特征的地理变异未见报道.本文利用多变量形态度量学方法对我国山东、浙江、广西和韩国4个地理种群泥蚶的形态变异进行了比较研究,探讨了泥蚶种内的形态变异特点与地理分化规律、并建立判别函数,为泥蚶地理种群的识别、种质保护和良种选育提供理论依据.
ONTOGENETIC CHANGES OF SEXUAL DIMORPHISM IN HEAD SIZE AND FOOD HABIT IN GRASS LIZARD,Takydromus septentrionalis
北草蜥个体发育过程中头部两性异形及食性的变化

,计翔
动物学研究 , 2000,
Abstract: Adult grass lizards,Takydromus septentrio nalis,are similar in size (SVL) but sexually dimorphic in head size (males' larger than females') throughout its range.A comprehensive analysis on the ecological and evolutionary sources of sexual differences in growth and size of heads requires a detailed understanding of growth trajectories during ontogeny.In this study,we specifically quesioned at what point during ontogeny males and females diverge in head size:at birth,during juvenile growth,or as mature adults? Our results indicate that males and females begin to diverge in head size at birth,although the divergence in the newly emerged young is much less pronounced than that in adults.An ANCOVA indicates that adult females even have smaller heads than do juveniles (including the newly emerged young).This suggests that adult females partition less resources into head growth but more into carcass growth,thereby leaving a larger space for eggs so as to increase reproductive output.Lizards collected in different seasons,from different populations,and at different ontogenetic stages,in various degrees,differ in food niche width and breadth.However,no direct evidence shows a substantial contribution of the divergence in head size to the segregation of food niche between males and females.Our analyses support that sexual selection is the main evolutionary source of smaller heads in female T.septentrionalis.
浙南岛屿岩相潮间带石鳖的群落结构
,刘德庆
动物学杂志 , 2002,
Abstract:
不同地理居群蓝尾石龙子染色体组型的比较
,
动物学杂志 , 2003,
Abstract:
蓝尾石龙子杭州和宁德种群繁殖生活史特征的差异
,杜卫国,寿鹿
动物学研究 , 2006,
Abstract: 测定处于不同纬度的浙江杭州和福建宁德的蓝尾石龙子(Eumeces elegans)种群的个体大小和繁殖特征。宁德种群的产卵时间为5月27日—6月22日,早于高纬度杭州种群(6月4日—7月12日)。宁德种群最小繁殖雌体及性成熟个体大小均显著小于杭州种群。宁德和杭州两种群的相对窝卵重无显著差异;当统计去除母体体长的影响之后,两地种群的窝卵数和窝卵重也无显著差异,但杭州种群的卵重量显著大于宁德种群。蓝尾石龙子窝卵数和卵重量呈负相关,窝卵数和卵大小的权衡存在种群间差异。特定窝卵数条件下,杭州种群的卵重量显著大于宁德种群。由此可见,蓝尾石龙子种群间的繁殖生活史特征存在显著差异,而且与母体大小的差异密切相关。推测不同纬度地区的蓝尾石龙子种群的繁殖策略存在差异。
浙江洞头列岛双壳类软体动物区系研究
,单乐州
动物学杂志 , 1994,
Abstract:
红耳滑龟幼体的热耐受性、体温和运动表现热依赖性
,潘志崇,计翔
生态学报 , 2003,
Abstract:
中华绒螯蟹(Eriocheir sinensis)成熟蟹、抱卵蟹、流产蟹肝胰腺脂肪酸组成的比较研究
应雪萍,,杨万喜
海洋与湖沼 , 2004,
Abstract: 采用气相色谱仪测定中华绒螯蟹(Eriocheir sinensis)不同生理阶段(成熟、抱卵、流产)肝胰腺内的脂肪酸组成。结果表明,中华绒螯蟹肝胰腺中含有22种脂肪酸,其中饱和脂肪酸(SFA)5种,单烯酸(MUFA)5种,多烯酸(PUFA)12种;MUFA 的含量最高,占52.47%-58.56% 。SFA次之,为23.17%-29.20 %,PUFA的含量较低,为8.92%-21.11% 。SFA、MUFA、PUFA的含量和Cn-3/ Cn-6值在不同生理阶段的中华绒螯蟹肝胰腺中差异极显著,油酸(C18:1)、棕榈酸(C16:0)、棕榈油酸(C16:1)是肝胰腺中的主要脂肪酸,其含量分别为35.21%-40.49%、17.97%-21.97%和11.69%-14-90%,不同生理阶段的中华绒螯蟹肝胰腺中各脂肪酸的百分含量差异显著。比较研究温州本地抱卵蟹和太湖抱卵蟹肝胰腺中的脂肪酸,发现脂肪酸中SFA、MUFA、PUFA的含量和Cn-3/ Cn-6值差异极显著,除C14:1、C18:1、C20:1及C20:5外,其它脂肪酸的百分含量存在极显著的差异。
不同年龄泥蚶几种消化酶活性的季节变化
,孙建礼,周化斌
动物学杂志 , 2003,
Abstract:
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