O'Connell C P, Leurs G
O'Seas Conservation Foundation, Inc., Yonkers, NY, 10701, U.S.A.
Wageningen University and Research Centre, Wageningen, Netherlands.
J Fish Biol. 2016 Mar;88(3):1257-64. doi: 10.1111/jfb.12900. Epub 2016 Feb 1.
A dorsal-fin photo-identification technique paired with a non-invasive parallel laser photogrammetry technique was used to non-invasively identify individual Sphyrna mokarran over time. Based on the data collected over a duration of 59 days, 16 different S. mokarran (mean ± S.D. pre-caudal length: 220·82 ± 13·66 cm; mean ± S.D. cephalofoil width: 71·38 ± 7·94 cm) were identified using dorsal-fin photo-identification, with a mean ± S.D. shark re-sighting frequency of 4·05 ± 3·06 at-sea days. The results illustrate a high S. mokarran sighting rate and therefore, the utilization of parallel laser photogrammetry and dorsal-fin photo-identification may be a plausible multi-year approach to aid in non-invasively determining the growth rate and inter-annual site fidelity of these animals.
一种背鳍照片识别技术与非侵入性平行激光摄影测量技术相结合，用于随着时间的推移对姥鲨个体进行非侵入性识别。基于59天内收集的数据，通过背鳍照片识别技术识别出16条不同的姥鲨（尾前长度平均值±标准差：220.82±13.66厘米；头翼宽度平均值±标准差：71.38±7.94厘米），在海上的平均±标准差的鲨鱼再次目击频率为4.05±3.06天。结果表明姥鲨的目击率很高，因此，平行激光摄影测量技术和背鳍照片识别技术的结合可能是一种可行的多年方法，有助于非侵入性地确定这些动物的生长速度和年际地点保真度。
