| 摘要: |
| 春、秋季播苗是缢蛏(Sinonovacula constricta)养殖的两种播苗方式,因养殖过程的水温和饵料不同,春季和秋季播苗的缢蛏生长存在差异。为了更加直观地描述春秋季播苗缢蛏的生长过程,选取von Bertalanffy、Gompertz、Logistic、Brody四种生长模型拟合春秋季播苗缢蛏壳长、湿重生长,分别确定春秋季播苗缢蛏最适生长模型。同时观察了其肥满度的周年变化。研究结果表明：春季播苗缢蛏壳长和湿重生长的最适拟合模型是Logistic模型；秋季播苗缢蛏壳长和湿重生长的最适拟合模型则分别是Logistic模型和von Bertalanffy模型。两季节的生长特征都是壳长生长拐点时间早于湿重生长拐点,春秋季播苗缢蛏的壳长生长拐点分别是51.95 d (壳长24.32 mm)、76.25 d (壳长29.30 mm)；湿重生长拐点分别是 108.09 d (湿重2.75 g)、147.98 d (湿重5.64 g)。春秋季播苗缢蛏周年肥满度变化均出现两个峰值。结合实测生长数据,秋季播苗缢蛏在翌年5月(247 d)个体规格可达到100 ind/kg以下；而春季播苗缢蛏需要养殖327 d才能达到100 ind/kg左右,秋季播苗比春季播苗可缩短养殖时间3个月左右,既减少成本也降低了养殖风险。本研究为缢蛏秋季播苗提供了科学理论依据,可为缩短养殖周期提前收获上市技术参考。 |
| 关键词: 缢蛏(Sinonovacula constricta) 播苗季节 生长模型 生长拐点 肥满度 |
| DOI： |
| 分类号: |
| 基金项目:宁波市“科技创新2025”重大专项, 2019B10006号 |
附件 |
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| COMPARATIVE STUDY ON GROWTH MODELING AND FATTENING OF SINONOVACULA CONSTRICTA SOWN IN SPRING AND FALL |
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FANG Zeng-Bing1, MEI Po-Cheng2, ZHAO Chun-Pu2, XU Ji-Lin2, WANG Dan-Li2, XU Shan-Liang2
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1.Ningbo Institute of Oceanography;2.School of Marine Science,Ningbo University
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| Abstract: |
| Spring and fall seeding are two types of Sinonovacula constricta culture seeding procedures, and the growth of Sinonovacula constricta seeded in spring and fall differs due to variances in water temperatures and baits used in the culture process. To more intuitively describe the growth process of razor clams sown in spring and fall, four growth models namely, von Bertalanffy, Gompertz, Logistic, and Brody, were chosen to fit the shell length and wet weight growth of S. constricta sown in spring and fall, and to determine the optimal growth model of spring and fall S. constricta sown in spring and fall, respectively. Simultaneously, annual fluctuations in fullness were detected. The Logistic model was shown to be the best fitting model for shell length and wet weight growth of S. constricta sown in spring, while the Logistic model and von Bertalanffy model were found to be the best fitting models for shell length and wet weight growth of S. constricta sown in fall. The inflection point of shell length was earlier than the inflection point of wet weight development in both seasons. For S. constricta sown in spring and fall, the inflection points of shell length were 51.95 days (shell length 24.32 mm) and 76.25 days (shell length 29.30 mm), respectively, and the inflection points of wet weight development were 108.09 days (wet weight 2.75 g) and 147.98 days (wet weight 5.64 g). There were two peaks in the annual fullness changes of S. constricta sown in spring and fall. In May of the following year (247 d), the individual size of S. constricta sown in the fall might drop below 100 ind/Kg when combined with the recorded growth data, whereas S. constricta sown in the spring required 327 days of culture to achieve 100 ind/kg. When S. constricta are sown in the fall, the culturing time can be shortened by three months as opposed to the spring, which can lessen the risk of culturing as well as the cost. This study provides a scientific theoretical basis for the fall sown of S. constricta, which can be used as a technical reference to shorten the culture cycle for early harvesting and marketing. |
| Key words: Sinonovacula constricta seeding season growth modeling growth inflection point fullness |