| 张根芳,张文府,方爱萍.2018.三角帆蚌幼蚌贝壳形态及体重生长规律.动物学杂志,53(5):760-768. |
| 三角帆蚌幼蚌贝壳形态及体重生长规律 |
| Growth Pattern of Shell Morphology and Body Weight of Young Hyriopsis cumingii |
| 投稿时间：2017-12-01 修订日期：2018-08-18 |
| DOI：10.13859/j.cjz.201805011 |
| 中文关键词: 三角帆蚌 形态学 体重 增长率 Logistic生长模型 |
| 英文关键词:Hyriopsis cumingii Morphology Body weight Growth rate Logistic growth model |
| 基金项目:国家贝类产业技术体系项目（No. CARS-49），浙江省自然科学基金项目（No. LY13C190004） |
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| 中文摘要: |
| 为了掌握三角帆蚌幼蚌贝壳形态及体重的生长规律，采用模型拟合的方法研究了三角帆蚌（Hyriopsis cumingii）幼蚌一个生长周期内4个贝壳性状形态及体重性状的生长规律。结果显示，三角帆蚌幼蚌的贝壳形态与体重的增长过程均遵循Logistic生长模型。运用Levenberg-Marquardt迭代法估计出生长模型中的3个生长参数，得到在观测周期内各性状的生长极限值分别为，壳长9.216 cm、壳高4.985 cm、壳宽2.212 cm、全高8.262 cm、体重75.240 g；各性状的快速生长区间分别为壳长2.211 ~ 5.181月龄、壳高2.107 ~ 5.363月龄、壳宽2.712 ~ 5.470月龄、全高2.294 ~ 5.026月龄、体重4.247 ~ 8.065月龄，可见体重具有明显的生长延缓现象。各性状的瞬时增长率曲线均呈钟型，先增大到达生长拐点后又逐渐减小；瞬时增长加速度曲线为倒S型曲线，有最高和最低点；相对增长率在养殖初期最大，然后随着生长逐渐下降。上述结果可为三角帆蚌的养殖生态及选择育种提供参考。 |
| 英文摘要: |
| In order to understand the growth pattern of shell morphology and body weight of young Hyriopsis cumingii cultured in cage, the non-linear growth models, Logistic, was used to describe the 4 morphological traits and body weight of young H. cumingii (Fig. 1). The results showed that the growth of young H. cumingii conformed to the Logistic growth model. Three growth parameters of the Logistic growth model were estimated by Levenberg-Marquardt iteration method, and the growth limits of the morphology and weight traits of the young H. cumingii were obtained in the observation cycle. They were 9.216 cm for shell length, 4.985 cm for shell height, 2.212 cm for shell width, 8.262 cm for height and 75.240 g for weight, respectively (Table 1). The cumulative growth of 4 morphological traits and body weight overall appeared first quick back slow trend (Fig. 2﹣4). The fastest growth intervals of the morphology and weight traits were, shell length 2.211﹣5.181 months, shell height 2.107﹣5.363 months, shell width 2.712﹣5.470 months, height 2.294﹣5.026 months and weight 4.247﹣8.065 months, respectively (Table 2). The weight had obvious growth retardation phenomenon. The instantaneous growth rate curve of all traits was bell shaped (Fig. 5), and it increased to growth inflexion point first and then it decreased gradually. The instantaneous growth acceleration curve was inverse “S” type curve (Fig. 6), and it had the highest point and the lowest point. The relative growth rate at the beginning of farming was highest, and then gradually decreases (Fig. 7). These results will provide theoretical guidance for ecological research and selective breeding, and provide reference for freshwater pearls grafting and culturing. |
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