| 摘要: |
| 养殖容量评估是合理规划养殖区的基础。基于虾夷扇贝养殖生态系统模型,模拟了2006年12月至2017年11月不同放苗密度下底播养殖虾夷扇贝的生长情况。在考虑肥满度对虾夷扇贝养殖收益的影响下,计算最大养殖收益及其对应的最适放苗密度和养殖容量,并通过最大养殖收益及其年际差异的聚类分析结果进行养殖区区划。结果表明:考虑扇贝肥满度的养殖收益能很好的抵消扇贝品质对养殖收益的影响;底播养殖虾夷扇贝的养殖容量和最适放苗密度有明显的时空差异,獐子岛和小长山岛之间并向长海海域东北部延伸的条带海域是高收益区;中收益区在高收益区南北两侧;低收益区位于研究区西北部和南中收益区南部;研究区南部由于饵料匮乏导致扇贝生长缓慢,为不适宜养殖区。开阔海域养殖容量也是有限的,片面增加放苗密度并不能达到增产增收的效果。研究结果可为合理规划和管理养殖区提供参考。 |
| 关键词: 底播养殖 虾夷扇贝 养殖生态系统模型 养殖容量 养殖分区 长海海域 |
| DOI：10.11693/hyhz20211100284 |
| 分类号:S967.9 |
| 基金项目:中国科学院战略先导项目,XDA23050502号;国家重点研发计划重点专项,2017YFC1404403号,2016YFC1401602号;国家自然科学基金,41806018号。 |
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| PRODUCTION-CARRYING CAPACITY ASSESSMENT FOR CULTURE AREA PLANNING OF PATINOPECTEN YESSOENSIS BASED ON CONDITION INDEX AND THE MAXIMUM TOTAL PROFIT |
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NAN Xue-Liang1,2, WEI Hao1, JIANG Zeng-Jie3, ZHANG Hai-Yan1, NIE Hong-Tao1
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1.School of Marine Science and Technology, Tianjin University, Tianjin 300072, China;2.Tianjin Academy of Eco-Environmental Sciences, Tianjin 300191, China;3.Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China
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| Abstract: |
| The assessment of production-carrying capacity is the basis for rational planning of aquaculture areas. A Yesso scallop culture ecosystem (YeSCE) model was developed in combination with the ecosystem model of ROMS- CoSiNE (Regional Ocean Modelling System coupled with the Carbon, Silicate and Nitrogen Ecosystem) and dynamic energy budget (DEB) model. The YeSCE model was used to simulate the growth of bottom-cultured Yesso scallop under different densities from December 1, 2006 to November 31, 2017 in Changhai sea area in the North yellow Sea. The spatio-temporal distribution of the total profit was calculated in consideration of the fatness of Yesso scallop cultured under different scallop densities. The optimal scallop density and production-carrying capacity at each grid point of the study area were determined under the constraint of the maximum total profit. The aquaculture areas were planned based on the cluster analysis on the maximum total profit and its interannual differences. The results show that the effect of production quality of Yesso scallop on total profit could be better balanced by considering scallop fatness. There were obvious spatio-temporal differences in the production-carrying capacity and optimal scallop density of the bottom-cultured scallop. The high-profit area is a strip zone between Zhangzi Island and Xiaochangshan Island and extends to the northeast of the Changhai sea area as shown in Fig.6 of this paper. The medium-profit area is located on both sides of the high-profit area. Due to the restriction of bottom water temperature, the northwest of the study area is low-profit area due to low fatness, and the south of the medium-profit area in the center of the study area is also a low-profit area. In the south of the study area (water depth >50 m), the growth of the Yesso scallop is slow due to the lack of food availability, which is not suitable for Yesso scallop bottom culture. The production-carrying capacity in the open sea is limited. Increasing merely the scallop density did not increase the total profit. The optimal scallop density planned in this study provided a theoretical support for making full use of production-carrying capacity to reach the maximum total profit in the scallop culture. |
| Key words: Bottom culture Patinopecten yessoensis aquaculture ecosystem model production-carrying capacity culture area planning Changhai sea area |
