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黑斑侧褶蛙肥满度及脏器重量的性别和季节差异
Sexual and Seasonal Differences of the Relative Fatness and Organ Mass of Pelophylax nigromaculata
金晨晨1, 瞿康山2, 张志强2*
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作者单位:(1. 安徽农业大学生命科学学院, 合肥 230036; 2. 安徽农业大学动物科技学院, 合肥 230036)
中文关键字:黑斑侧褶蛙;肥满度;内脏器官;季节;性别
英文关键字:Pelophylax nigromaculata; relative fatness; internal organ; season; gender
中文摘要: 内脏器官的大小能反映动物的生长发育情况和生理生态状况,可作为动物对环境适应的近似指标。以黑斑侧褶蛙Pelophylax nigromaculata为研究对象,测定了2012年夏季、秋季及2013年春季其体重、体长、含水量、肥满度及脏器重量的性别和季节差异。结果显示:1)雌蛙的体重和体长均高于雄蛙,两性都在秋季最高;胴体湿重和干重无性别差异,胴体湿重夏季最高,胴体干重无季节差异。2)含水量和肥满度无性别差异,前者夏季和春季高于秋季,后者秋季高于春季;躯体肥满度和干体肥满度雄蛙均高于雌蛙,雄蛙无季节差异,雌蛙夏季最高,春季最低。体重与体长的比值(KWL)雌蛙高于雄蛙,两性都在秋季最高,春季最低。3)除肺干重雄蛙大于雌蛙,肾脏干重雌蛙大于雄蛙外,其他内脏器官的湿重和干重均无性别差异。肺湿重春季高于夏季和秋季,肾脏湿重无季节性差异;雄蛙的肺干重春季高于夏季,肾干重秋季高于夏季和春季,雌蛙均无季节差异。心脏和脾脏湿重都在夏季最高,秋季或春季最低,但干重均无季节差异。脂肪体和肝脏及卵巢和输卵管的湿重和干重均在秋季最高,春季或夏季最低。精巢的湿重及干重均无季节差异。结果表明,KWL可较好地反映成年黑斑侧褶蛙整体水平的营养和生理状况,多种器官重量有季节性的可塑性,这可能与雌、雄蛙的繁殖状态有关。
英文摘要:Internal organ size can reflect the situation of animal’s growth and development, as well as physiological and ecological conditions, which is usually used as an approximate index to measure animal’s adaptation in different environments. The sexual and seasonal variations of body mass, snout-vent length (SVL), water content, relative fatness, wet and dry mass of internal organ of black-spotted pond frog (Pelophylax nigromaculata) were measured in summer and autumn, 2012, and spring 2013, respectively. The results were as follows: 1)  the body mass and SVL of females were higher than in males and the highest value was observed in autumn. No sexual differences were observed between wet and dry mass of carcass, and the wet mass rather than dry mass of carcass showed the highest value in summer. 2) No sexual differences were observed between water content and relative fatness. The water content of black-spotted pond frog in summer and spring was higher than in autumn, and the relative fatness in autumn was higher than in spring. The relative fatness of carcass and dry carcass of males were higher than females. The ratio of body mass to snout-vent length (KWL) of females was higher than males, and was higher in autumn than in spring. 3) The dry mass of lung of males was higher than females, whereas the dry mass of kidney of females was higher than males. Additionally, no sexual differences were found between any other internal organ wet and dry mass. The wet mass of lung rather than kidney in spring was higher than in summer and autumn. The dry mass of lung in spring was higher than in summer, and the dry mass of kidney in autumn was higher than in summer and spring, which was only observed in males rather than females. The wet mass of heart and spleen in summer was higher than in autumn and spring. No significant seasonal variations were observed in the dry mass of heart and spleen. The wet and dry mass of fat, liver, ovary and oviduct showed the highest values in autumn and the lowest in spring and summer. No seasonal changes were found between the wet and dry mass of testis. These results indicated that KWL is a good candidate to measure the nutritional and physiological conditions for adult Pelophylax nigromaculata. The seasonal plasticity of the mass of multiple internal organs may be related to the reproductive status of male and female frogs.
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国内统一连续出版物号:51-1193/Q |国际标准出版物号:1000-7083
主管单位:四川省科学技术协会  主办单位:四川省动物学会/成都大熊猫繁育研究基金会/四川省野生动植物保护协会/四川大学
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