| 摘要: |
| 单位捕捞努力量渔获量(Catch Per Unit Effort,CPUE)是资源评估的前提和基础,为了更好地评估西北印度洋鸢乌贼资源,采用广义加性模型(generalized additive model,GAM)对2016~2020年西北印度洋鸢乌贼的CPUE进行了标准化。结果显示,月份、海表温度(sea surface temperature,SST)、海面高度(sea surface height,SSH)、经度和纬度对CPUE呈显著性影响,通过对不同GAM模型的AIC(Akaike information criterion)值比较,由月份、SST、SSH、经度和纬度5个因子构成的GAM模型为最优CPUE标准化模型,对CPUE偏差的解释率为40.3%。研究表明,西北印度洋鸢乌贼高CPUE主要出现在9月至翌年3月,海域范围为16°~19°N、60°~65°E,SST为25~28℃、SSH为0.2~0.4m的海域内。整体而言,标准化CPUE低于名义CPUE,但二者的变化趋势基本一致。 |
| 关键词: 西北印度洋 鸢乌贼 CPUE标准化 GAM模型 |
| DOI：10.11693/hyhz20220400112 |
| 分类号:S932;S937 |
| 基金项目:国家重点研发计划项目,2019YFD090402号;国家自然科学基金项目,NSFC41506184号。 |
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| STANDARDIZATION OF CATCH PER UNIT EFFORT (CPUE) IN NORTHWEST INDIAN OCEAN STHENOTEUTHIS OUALANIENSIS BASED ON GENERALIZED ADDITIVE MODEL |
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ZHANG Bi-Qiang1, LU Hua-Jie1,2,3,4, ZHAO Mao-Lin1, SUN Tian-Zi1, GUO Rui-Yu1
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1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;2.Key Laboratory of Marine Ecological Monitoring and Restoration Technologies, MNR, Shanghai 201306, China;3.National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai 201306, China;4.Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China
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| Abstract: |
| Catch per unit effort (CPUE) is the premise and basis of resource assessment. To better assess the resources of purpleback flying squid Sthenoteuthis oualaniensis in the northwest Indian Ocean, we used the generalized additive model (GAM) to standardize the CPUE of S. oualaniensis in the northwest Indian Ocean from 2016 to 2020. The results showed that month, sea surface temperature (SST), sea surface height (SSH), longitude, and latitude have significant effects on the CPUE. Comparison of AIC (Akaike information criterion) values of different GAM models established the best CPUE evaluation model in which five factors of month, SST, SSH, longitude, and latitude are used, and the interpretation rate of CPUE deviation is 40.3%. The research showed that the high CPUE of S. oualaniensis in the northwest Indian Ocean occurs mainly from September to next March in the sea area covering from 16°N to 19°N, 60°E to 65°E, SST from 25 ℃ to 28 ℃, and SSH from 0.2m to 0.4 m. On the whole, the standardized CPUE is lower than the nominal CPUE, but their change trends are largely the same. |
| Key words: northwest Indian Ocean Sthenoteuthis oualaniensis CPUE standardization GAM model |
