Pattern Recognition of Beak in Jumbo Squid Dosidicus gigas
GOU Yimeng1, LIU Bilin1,2,3, KONG Xianghong1
1. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; 2. The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China; 3. National Distant-Water Fisheries Engineering Research Center, Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
Abstract：As one of a few hard tissues in cephalopods, beak has been widely used in species identification and population discrimination of cephalopods. This study is based on jumbo squid Dosidicus gigas samples collected in 2009, 2014 and 2015 in the seas off Chile, Peru, Ecuador, and Costa Rica. The method of beak recognition based on discriminant function was proposed and 10 length indices of beak were analyzed. Among those, 70 percent of the samples were used to construct the discriminant function, while 30 percent were used to test. The results showed that the beak from Chile open seas had the largest size and the Peru one had the smallest. The beak′s length was used to identify the populations in different geographical areas, with success rate of more than 95.2%. In Chile, Peru, Ecuador and Costa Rica, the contribution rates were 97.6%,91.0%,96.1% and 96.0%, respectively. The length of the upper lateral wall length, the upper hood length and the upper rostrum length contributed the most. The discriminant function 1, function 2 and function 3 effectively explained the difference of beak between sea areas, with the explanatory rate of 54.9%,29.6% and 15.5%, respectively. The discriminant verification showed that 26 of the 250 samples were wrongly identified. The least number of samples wrongly identified was in the Ecuadorian area. The overall success rate of the test discrimination was 89.6%. As a result, this findings indicated that the morphological difference of beak of jumbo flying squid can be used to identify the geographic populations.
[1] 陈新军,刘必林,王尧耕.世界头足类[M].北京:海洋出版社,2009. [2] 王尧耕,陈新军.世界大洋性经济柔鱼类资源及其渔业[M].北京:海洋出版社,2005. [3] 李建华,陈新军,方舟.哥斯达黎加海域茎柔鱼角质颚稳定同位素研究[J].上海海洋大学学报,2013,22(6):936-943. [4] 韩飞,陈新军,林东明,等.东太平洋赤道海域茎柔鱼体征生长及生殖投入[J].水产学报,2019,43(12):2511-2522. [5] 王斌斌,李小敏.基于统计模式识别的人脸检测方法综述[J].电脑知识与技术,2008,3(26):1783-1784. [6] 熊超.模式识别理论及其应用综述[J].中国科技信息,2006(6):171-172. [7] 马迪,金岳,陈芃,等.基于角质颚形态的东海2种常见乌贼类的种类判别[J].上海海洋大学学报,2018,27(4):594-602. [8] 范江涛,邱永松,陈作志,等.南海鸢乌贼两个群体间角质颚形态差异分析[J].中国海洋大学学报(自然科学版),2015,45(10):42-49. [9] 陈新军,刘金立,许强华.头足类种群鉴定方法研究进展[J].上海水产大学学报,2006,15(2):228-233. [10] 易倩,陈新军,贾涛,等.基于外部形态特征的东南太平洋茎柔鱼种群结构研究[J].海洋湖沼通报,2012(4):96-103. [11] 任品,陆化杰,唐悦,等.西北太平洋北方拟黵乌贼耳石外部形态特性分析[J].水产学报,2020,44(1):49-60. [12] 方舟,陈新军,陆化杰,等.阿根廷滑柔鱼两个群体间耳石和角质颚的形态差异[J].生态学报,2012,32(19):5986-5997. [13] LIU B L, FANG Z, CHEN X J, et al. Spatial variations in beak structure to identify potentially geographic populations of Dosidicus gigas in the Eastern Pacific Ocean[J].Fisheries Research,2015,164:185-192. [14] 陈芃,方舟,陈新军.基于角质颚外部形态学的柔鱼种群判别[J].海洋渔业,2015,37(1):1-9. [15] 陆化杰,陈新军,方舟.西南大西洋阿根廷滑柔鱼2个不同产卵群间角质颚外形生长特性比较[J].中国海洋大学学报(自然科学版),2012,42(10):33-40. [16] 苏杭,方舟,陈新军.2种大洋性柔鱼类角质颚形态识别法的比较[J].海洋渔业,2016,38(3):225-235. [17] CARVALHO G R, NIGMATULLIN C M. Stock structure analysis and species identification [J]. FAO Fisheries Technical Paper,1998:199-232. [18] 林静远,刘必林,陈新军.头足类角质颚微化学及其在渔业生态学中的应用研究进展[J].大连海洋大学学报,2019,34(2):280-287. [19] 胡贯宇,陈新军,方舟.个体生长对秘鲁外海茎柔鱼角质颚形态变化的影响[J].水产学报,2016,40(1):36-44. [20] 李建华,陈新军,陈芃,等.赤道海域茎柔鱼角质颚形态及生长特征分析[J].海洋渔业,2018,40(4):385-393. [21] 刘竞妍,张可,王桂华.综合评价中数据标准化方法比较研究[J].数字技术与应用,2018,36(6):84-85. [22] 方舟,陈新军,瞿俊跃,等.北太平洋柔鱼角质颚形态及生长年间差异[J].上海海洋大学学报,2020,29(1):109-120. [23] 管于华. 统计学 [M].北京:高等教育出版社,2005. [24] THORROLD S R, LATKOCZY C, SWART P K, et al. Natal homing in a marine fish metapopulation[J].Science,2001,291(5502):297-299. [25] NIGMATULLIN C M, NESIS K N, ARKHIPKIN A I. A review of the biology of the jumbo squid Dosidicus gigas (Cephalopoda:Ommastrephidae)[J].Fisheries Research,2001,54(1):9-19. [26] LIU B L, CHEN X J, CHEN Y, et al. Age, maturation, and population structure of the Humboldt squid Dosidicus gigas off the Peruvian Exclusive Economic Zones[J].Chinese Journal of Oceanology and Limnology,2013,31(1):81-91. [27] SANDOVAL-CASTELLANOS E, URIBE-ALCOCER M, DÍAZ-JAIMES P. Population genetic structure of jumbo squid (Dosidicus gigas) evaluated by RAPD analysis[J].Fisheries Research,2007,83(1):113-118. [28] 胡贯宇,方舟,陈新军.东太平洋茎柔鱼生活史研究进展[J].水产学报,2018,42(8):1315-1328. [29] 田兵.Fisher判别分析及其应用[J].渭南师范学院学报,2014,29(23):8-11. [30] 瞿健菊.SPSS中判别分析的使用——以语言学实验为例[J].文教资料,2015(34):16-18. [31] CHEN X J, LU H J, LIU B L, et al. Species identification of Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualaniensis and Illex argentinus (Ommastrephidae) using beak morphological variables[J].Scientia Marina,2012,76(3):473-481. [32] 颜云榕,易木荣,冯波,等.南海鸢乌贼3个地理群体形态差异与判别分析[J].广东海洋大学学报,2015,35(3):43-50. [33] 方舟,陈新军,金岳.基于角质颚的东、黄海头足类科类判别[J].上海海洋大学学报,2019,28(3):365-372. [34] LIU B L, CHEN Y, CHEN X J. Spatial difference in elemental signatures within early ontogenetic statolith for identifying jumbo flying squid natal origins[J].Fisheries Oceanography,2015,24(4):335-346. [35] 刘必林,陈新军,方舟,等.基于角质颚长度的头足类种类判别[J].海洋与湖沼,2015,46(6):1365-1372. [36] VEGA M A, ROCHA F J, GUERRA A, et al. Morphological differences between the Patagonian squid Loligo gahi populations from the Pacific and Atlantic Oceans [J]. Bulletin of Marine Science,2002,71(2):903-913. [37] ZEIDBERG L D, ROBISON B H. Invasive range expansion by the Humboldt squid, Dosidicus gigas,in the eastern North Pacific[J].Proceedings of the National Academy of Sciences of the United States of America,2007,104(31):12948-12950.
2022, Vol. 41 
