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Digital light microscopy to characterize the scales of two goatfishes (Perciformes; Mullidae).
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-09-05 , DOI: 10.1002/jemt.23576 Najmeh Sabbah 1 , Azad Teimori 1 , Majid Askari Hesni 1
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-09-05 , DOI: 10.1002/jemt.23576 Najmeh Sabbah 1 , Azad Teimori 1 , Majid Askari Hesni 1
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The normal and lateral line scales from above the head and four flank regions were investigated in two goatfishes by using light microscopy to evaluate the microscopic characteristics of scale surface ornamentation from different body parts of these fishes and to add new morphological data for their discrimination. The body scales were removed and digital images captured with a Dino‐Lite digital camera connected to a Leica compound microscope. The presence of both transverse and longitudinal radii was a distinctive characteristic for the scales of studied goatfishes. The most distinctive features of the key scales discriminating the two goatfishes were the scale shape, the presence of irregular grooves in scale surface, the presence of transverse radii in the lateral fields, and the availability of lepidont at the anterior field. The lateral line scale ornamentations were almost similar in two species; however, the lateral line canal was branching in Parupeneus heptacanthus. Scale extension index indicated that in both species, the dimension of normal key scales tends to the right, while the dimension of lateral line scales tends to the left. This study accentuated that scales from different body regions may exhibit variation in surface ornamentations, that scale morphology could successfully be used to discriminate the examined goatfishes, and that the use of fish scale microscopy is an easy and relatively rapid method and does not require fish sacrifice. Since fish identification is essential for the conservation and management of species, the use of scale morphology to this purpose appears particularly promising.
中文翻译：
数字光学显微镜用于表征两种山羊鱼（Perciformes；Mullidae）的鳞片。
通过光学显微镜对两条山羊鱼头部和四个侧腹区域的正常和侧线鳞片进行了研究，以评估这些鱼不同身体部位鳞片表面纹饰的微观特征，并为它们的鉴别添加新的形态学数据。去除身体鳞片并使用连接到徕卡复合显微镜的 Dino-Lite 数码相机拍摄数字图像。横向和纵向半径的存在是所研究的山羊鱼鳞片的一个独特特征。区分这两种山羊鱼的关键鳞片最显着的特征是鳞片形状、鳞片表面不规则凹槽的存在、侧域中横向半径的存在以及前域中鳞齿的可用性。两个物种的侧线鳞纹纹饰几乎相似；然而，侧线管在Parupeneus heptacanthus。鳞片扩展指数表明，在两个物种中，正常关键鳞片的尺寸都趋向于右侧，而侧线鳞片的尺寸则趋向于左侧。这项研究强调了来自不同身体区域的鳞片可能会表现出表面纹饰的变化，鳞片形态可以成功地用于区分被检查的山羊鱼，并且使用鱼鳞显微镜是一种简单且相对快速的方法，不需要牺牲鱼. 由于鱼类识别对于物种的保护和管理至关重要，因此为此目的使用鳞片形态学似乎特别有前途。
更新日期：2020-09-05
中文翻译：
数字光学显微镜用于表征两种山羊鱼（Perciformes；Mullidae）的鳞片。
通过光学显微镜对两条山羊鱼头部和四个侧腹区域的正常和侧线鳞片进行了研究，以评估这些鱼不同身体部位鳞片表面纹饰的微观特征，并为它们的鉴别添加新的形态学数据。去除身体鳞片并使用连接到徕卡复合显微镜的 Dino-Lite 数码相机拍摄数字图像。横向和纵向半径的存在是所研究的山羊鱼鳞片的一个独特特征。区分这两种山羊鱼的关键鳞片最显着的特征是鳞片形状、鳞片表面不规则凹槽的存在、侧域中横向半径的存在以及前域中鳞齿的可用性。两个物种的侧线鳞纹纹饰几乎相似；然而，侧线管在Parupeneus heptacanthus。鳞片扩展指数表明，在两个物种中，正常关键鳞片的尺寸都趋向于右侧，而侧线鳞片的尺寸则趋向于左侧。这项研究强调了来自不同身体区域的鳞片可能会表现出表面纹饰的变化，鳞片形态可以成功地用于区分被检查的山羊鱼，并且使用鱼鳞显微镜是一种简单且相对快速的方法，不需要牺牲鱼. 由于鱼类识别对于物种的保护和管理至关重要，因此为此目的使用鳞片形态学似乎特别有前途。
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