| 摘要: |
| 根据2015年1～5月从南海北部陆架区水域采集的蓝圆(Decapterus maruadsi,Temminck & Schlegel,1843),测量样本矢耳石长､宽､周长､面积､长宽比､圆形趋近率､矩形趋近率､成形系数等形态学参数,分析耳石形态特征,构建耳石形态代表性参数与叉长､体质量的关系.结果显示,该调查所采集的蓝圆耳石呈长梭形,有基叶､翼叶和主间沟,背部的脊突较腹部的叶突明显,中央听沟深且明显.经主成分分析,耳石长､宽､周长､面积､最大半径､最小半径､最小外接矩形面积7个特征为其蓝圆耳石的主要形态特征.蓝圆耳石主要形态特征与叉长和体质量的关系均适合对数函数;蓝圆耳石主要形态特征参数随叉长增长呈稳定增长趋势;耳石主要形态特征参数随体质量的增长呈先快后慢的趋势.耳石各形态特征参数中,耳石外接矩形面积增长最快,最小半径增速最慢.矩形趋近率､圆形趋近率和成形系数变化不显著,轮廓变化差异较小. |
| 关键词: 海洋生物学 蓝圆 耳石 形态参数 南海北部 |
| DOI：10.3969/J.ISSN.2095-4972.2017.03.016 |
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| 基金项目:公益性行业(农业)专项资助项目(201403008);农业部财政专项资助项目(NFZX2013);农业部海洋渔业资源调查探捕资助项目(2014-2018) |
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| Otolith morphology of Decapterus maruadsi in the continental shelf of northern South China Sea |
| DAI Jia-ge,CHEN Zuo-zhi,HUANG Zi-rong,XU You-wei,SUN Ming-shuai,ZHANG Kui,JIANG Yan-e |
| (South China Sea Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510300, China; Key Laboratory of Open-Sea Fishery Development, Ministry of Agriculture Guangzhou 510300, China; South China Agricultural University, College of Marine Science, Guangzhou 510642, China) |
| Abstract: |
| From January 2015 to May 2015, the fish Decapterus maruadsi were collected from the continental shelf of Northern South China Sea. Sagittal otolith length, width, perimeter, area, length-width ratio, circularity, rectangularity, form factor and other basic morphological parameters were measured for the morphological characteristics of the otoliths, models of typical parameters of otoliths’ shape with body length and body weight were built respectively. The results showed that the sagittal otoliths of D. maruadsi in this survey was of long shuttle forms, had rostrum, antirostrum and excisural notch with obvious leafed aragonite crystal and knob, and the central notch was deep and clear. According to the main component analysis, seven main morphology characteristics were described for otolith length, otolith width, perimeter, area, the maximum radius of the otolish, the minimum radius of the otolish, area of the minimum circumscribed rectangle. Models of typical parameters of otoliths' shape with body length and body weight were fitted with both log function. The parameters increased steadily following the body length, but for the body weight, the parameters increased fast at first, and then increased steadily. The area of minimum circumscribed rectangle increased on the fastest speed, however, the maximum radius of the otolish increased on the slowest speed. The changes of circularity, rectangularity and form factor were not obvious and, either, the shape. |
| Key words: marine biology Decapterus maruadsi Otolith(sagittal) morphological parameters northern South China Sea |
