A Paired-Laser Photogrammetric Method for In Situ Length Measurement of Benthic Fishes
A Paired-Laser Photogrammetric Method for In Situ Length Measurement of Benthic Fishes
复制标题
底栖鱼类原位长度测量的成对激光摄影测量方法
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
P. Thompson
中科院分区：
文献类型：
--
作者：
A. Rizzo;S. Welsh;P. Thompson
摘要摄影测量是一种从照片中获取测量值的技术，可能是测量稀有、受威胁或濒危物种长度的有效方法。摄影测量方法是非侵入性的，可以减少与捕获和处理个体相关的物理损伤或生理压力的可能性。我们评估了摄影测量长度测量相对于水族箱中 Greenside darter Etheostoma blennioides 和 Variegate darters E. variatum 的板测量的精度和准确性，并将摄影测量应用于联邦列出的濒危物种 Diamond Darter Crystallaria cincotta 的实地研究。使用配备两个平行激光器的防水相机为每个人拍摄数码照片。使用 ImageJ 软件将摄影测量长度测量数字化。对于格林赛德和杂色镖鲈来说，木板测量和摄影测量之间的一致性很高。直接和...之间的差异幅度很小。
AbstractPhotogrammetry, a technique to obtain measurements from photographs, may be a valid method for measuring lengths of rare, threatened, or endangered species. Photogrammetric methods of measurement are nonintrusive and reduce the possibility of physical damage or physiological stress associated with the capture and handling of individuals. We evaluated precision and accuracy of photogrammetric length measurements relative to board measurements of Greenside Darters Etheostoma blennioides and Variegate Darters E. variatum in an aquarium and applied photogrammetry in a field study of the Diamond Darter Crystallaria cincotta, a federally listed endangered species. Digital photographs were taken of each individual using a waterproof camera equipped with two parallel lasers. Photogrammetric length measurements were digitized with ImageJ software. Agreement between board and photogrammetric measurements were high for Greenside and Variegate darters. The magnitude of differences was small between direct and...