| 3种鱼群个体间距的计算方法比较 |
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| 引用本文： | 张仲秋,周应祺,钱卫国,王 明,王 军.3种鱼群个体间距的计算方法比较[J].上海海洋大学学报,2012,21(5):750-755. |
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| 作者姓名： | 张仲秋 周应祺 钱卫国 王 明 王 军 |
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| 作者单位： | 上海海洋大学 海洋科学学院;上海海洋大学 海洋科学学院;上海海洋大学 海洋科学学院;上海海洋大学信息学院;上海海洋大学 海洋科学学院 |
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| 基金项目： | 国家公益性行业（农业）科研专项（201003024）；上海市捕捞学重点学科建设项目（S30702） |
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| 摘 要： | 对实验室水族箱中的鱼群空间分布状态进行录像,采用质心法、线段法和三点折线法计算个体间距离。结果表明,由3种方法计算获得的个体间距值均随着群体的个体尾数的增加而趋近于0.5～2倍体长(BL)的范围内。线段法与三点折线法的计算结果基本相同,而质心法的计算结果的精度低于其它两种方法。在间距大于0.2 BL时,三点折线法计算得到的个体间距的频率分布普遍高于线段法,计算结果更准确。同时线段法和三点质心法所获得的个体间距在0.6～0.8 BL范围内的频率达到最大,该范围为鱼类偏好的距离范围。
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| 关 键 词： | 鱼群 个体间距 空间分布 偏好距离 |
Comparative study on the distance measurements among individuals in the fish school by three methods |
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| ZHANG Zhong-qiu,ZHOU Ying-qi,QIAN Wei-guo,WANG Ming and WANG Jun.Comparative study on the distance measurements among individuals in the fish school by three methods[J].Journal of Shanghai Ocean University,2012,21(5):750-755. |
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| Authors: | ZHANG Zhong-qiu ZHOU Ying-qi QIAN Wei-guo WANG Ming and WANG Jun |
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| Institution: | 1(1.College of Marine Sciences,Shanghai Ocean University,Shanghai 201306,China;2.Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;3.Key Laboratory of Shanghai Education Commission for Oceanic Fisheries Resources Exploitation,Shanghai Ocean University,Shanghai 201306,China;4.Information College,Shanghai Ocean University,Shanghai 201306,China) |
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| Abstract: | According to the video records of spatial distribution of individuals in the fish school taken in the lab,the distances among individuals in fish school measured and calculated by the body-centroid method(BCM),segment method(SM) and broken line of three point method(BLM) indicate that the most of distances are varied in the range of 0.5-2 times body length(BL) while the number of individuals increasing to a certain level.The results by SM were basically same as the one from BLM,and the precision of BCM was lower than the others.When the body length was greater than 0.2 BL,the frequency of distance appearance of BLM was generally higher than SM’s and its result was more precise.And the distances calculated by means of the SM and BLM were mostly allocated in the range of 0.6-0.8 BL,which revealed that the range might be the preferred distance of the fish. |
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| Keywords: | fish school distance among individuals spatial distribution preferred distance |
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