Effects of environmental factors on natural reproduction of the four major Chinese carps in the Yangtze River, China [0.03%]
环境因素对中国四大淡水经济鱼类自然繁殖的影响分析——以长江中下游为例
Mingzheng Li,Xin Gao,Shaorong Yang et al.
Mingzheng Li et al.
The four major Chinese carps are commercially important fish species with high production in China. However, their recruitment decreased sharply in the Yangtze River since the late 20(th) century. In the present study, to reveal the relatio...
Sexual shape and size dimorphism in carabid beetles of the genus Ceroglossus: is geometric body size similar between sexes due to sex ratio? [0.03%]
圆腹沟步甲属虎甲性形状和大小二态性的研究：两性几何体型相似是由于性别比例造成的吗？
Hugo A Benítez,Maria-José Sanzana,Viviane Jerez et al.
Hugo A Benítez et al.
Insects in many species vary greatly in the expression of secondary sexual traits, resulting in sexual dimorphism, which has been proposed to be a consequence of differences in sexual selection. In this study, we analyze the occurrence of s...
Geographic distributions of sexual and parthenogenetic forms of the weevil Scepticus insularis (Coleoptera: Curculionidae) in Japan [0.03%]
日本四国岛松脂象甲Scepticus insularis有性和孤雌繁殖两性形式的地理分布研究
Yasuhiro Tada,Haruo Katakura
Yasuhiro Tada
Geographic ranges of parthenogenetic animals often differ from those of their sexual conspecifics, providing valuable information about evolutionary histories. We studied the geographic distributions of sexual and parthenogenetic forms of t...
Spatial and temporal aspects of occurrence of Mogera species in the Japanese islands inferred from mitochondrial and nuclear gene sequences [0.03%]
基于线粒体和核基因序列推断日本岛屿Mogera物种的时空分布特征
Takashi Kirihara,Akio Shinohara,Kimiyuki Tsuchiya et al.
Takashi Kirihara et al.
We assessed dispersal and vicariant events in four species of Japanese moles in the genera Mogera and Euroscaptor to better understand the factors shaping intra- and interspecific differentiation in Japanese moles. We used the combined view...
Sexual differences in post-hatching Saunders's gulls: size, locomotor activity, and foraging skill [0.03%]
雏乌雕鸥的性别差异：大小、运动和觅食技能
Jongmin Yoon,Seung-Hee Lee,Eun-Jin Joo et al.
Jongmin Yoon et al.
Various selection pressures induce the degree and direction of sexual size dimorphism in animals. Selection favors either larger males for contests over mates or resources, or smaller males are favored for maneuverability; whereas larger fe...
The defensive function of trichocysts in Paramecium tetraurelia against metazoan predators compared with the chemical defense of two species of toxin-containing ciliates [0.03%]
四膜虫柄纤毛囊对多壳捕食者的防御功能及其与两种含毒纤毛虫的化学防御的比较研究
Federico Buonanno,Terue Harumoto,Claudio Ortenzi
Federico Buonanno
The time-honored assumption about the defensive function of trichocysts in Paramecium against predators was recently verified experimentally against different species of unicellular predators. In the present study, we examined the defensive...
The role of scent-marking in patchy and highly fragmented populations of the Cabrera vole (Microtus cabrerae Thomas, 1906) [0.03%]
嗅觉标记在条斑分布和高度片段化栖息地的 Cabrera 小鼠（Microtus cabrerae Thomas, 1906）种群中的作用
Luis Alexandre Piteira Gomes,António Paulo Pereira Mira,Eduardo Nuno Barata
Luis Alexandre Piteira Gomes
Rodent scent-marking is often used for territorial defence and self-advertisement, and both functions often entail the continuous scent-marking of a large area with high costs. In species with highly-fragmented populations and low density, ...
Recent advances in the understanding of teleost medaka ovulation: the roles of proteases and prostaglandins [0.03%]
近年来研究发现日本裂唇鱼排卵机制中的蛋白酶和前列腺素的作用取得进展
Takayuki Takahashi,Chika Fujimori,Akane Hagiwara et al.
Takayuki Takahashi et al.
Ovulation is the process of liberating oocytes from the preovulatory follicles, and is observed in the ovaries of virtually all female vertebrate animals. Compared with mammalian species, there have been far fewer studies that address the o...
Molecular cloning and transcript expression of genes encoding two types of lipoprotein lipase in the ovary of cutthroat trout, Oncorhynchus clarki [0.03%]
虹彩鱼卵卵巢中两种脂蛋白酶的分子克隆及转录表达
Yong-Woon Ryu,Ricako Tanaka,Ayumi Kasahara et al.
Yong-Woon Ryu et al.
Large amounts of neutral lipids (NLs) are stored as lipid droplets in the ooplasm of fish oocytes, providing an essential energy resource for developing embryos and larvae. However, little is known about the origin of such lipids or about m...
Static and dynamic hypergravity responses of osteoblasts and osteoclasts in medaka scales [0.03%]
斑马鱼鳞片中成骨细胞和破骨细胞的静态和动态超重反应
Sachiko Yano,Kei-Ichiro Kitamura,Yusuke Satoh et al.
Sachiko Yano et al.
Fish scales are a form of calcified tissue similar to that found in human bone. In medaka scales, we detected both osteoblasts and osteoclasts and subsequently developed a new scale assay system. Using this system, we analyzed the osteoblas...