研究人员在纽约长岛汉普顿海滩附近捕获多种鲨鱼,包括大白鲨和沙虎鲨,为其安装数据收集设备并采集组织样本后放生12。这项研究旨在了解当地鲨鱼种群数量,并揭示全球少数几个已确认的大白鲨幼鱼群落之一的奥秘1。研究人员使用两种标签进行追踪:一种通过声学信号被沿海监测接收器检测,另一种测量深度和水温数个月后脱落1。
被标记的鲨鱼在北卡罗来纳州、乔治亚州、佛罗里达州和墨西哥湾被检测到,次年返回长岛1。研究表明,随着长岛沿岸海水升温,更多热带鲨鱼在夏季北上觅食1。大白鲨幼鲨出生时体长约4英尺(1.2米),重达80磅(36公斤)1。研究人员指出,这些鲨鱼来到该地区是为了自我补充能量、增加体重1。
值得注意的是,国际鲨鱼袭击档案库未记录长岛发生过致命鲨鱼袭击事件1。此外,大白鲨直到二十多岁才开始交配,许多个体在有机会繁殖前就被捕杀1。
Scientists have captured multiple shark species off the coast of New York's Hamptons and equipped them with tracking devices to monitor their movements and gather biological data 1. The research initiative aims to understand local shark populations, particularly one of the few confirmed great white shark nurseries in the world 1.
The tagged sharks included great white sharks and sand tiger sharks 12. Great white shark pups are born measuring approximately 4 feet (1.2 meters) in length and weighing around 80 pounds (36 kilograms) 1. Researchers deployed two types of monitoring tags: acoustic tags that transmit signals detectable by coastal receivers, and temperature and depth recorders that detach after several months of data collection 1. The tagged sharks were subsequently detected off North Carolina, Georgia, Florida, and in the Gulf of Mexico before returning to Long Island the following year 1.
The research reveals that warming ocean waters along the Long Island coast are drawing more tropical shark species northward during summer months to feed 1. According to researchers, these sharks arrive in the region to "replenish and gain weight" 1. Despite the increased shark sightings in the area, the International Shark Attack File has recorded no fatal shark attacks on Long Island 1. Scientists note that great white sharks do not begin mating until their twenties, and many individuals are killed before reaching reproductive age 1.
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