ABSTRACT: The smalltooth sawfish Pristis pectinata is an endangered species endemic to the Atlantic Ocean. The only known viable populations occur in the USA along both coasts of Florida and in the western Bahamas. Little is known about habitat use and movement ecology of large juvenile and adult smalltooth sawfish. Although Critical Habitat—a management designation in the USA—has been identified for small juveniles, it has yet to be identified for these life stages. Between May 2016 and April 2019, we used passive acoustic telemetry and 3 large data sharing networks of receivers to track movements of 43 large juvenile and adult smalltooth sawfish. During this study, 24 females and 19 males were implanted with transmitters with estimated 4 or 10 yr battery lives. These tagged individuals were detected off the southeastern USA on 461 receivers ranging from off the coast of Brunswick, Georgia, to the lower Florida Keys, and along the Gulf coast to Apalachee Bay, Florida. Seasonal migrations were undertaken by 58% (43% mature; 57% immature) of the tagged individuals, with the remainder being apparent residents of their tagging locations. Tagged sawfish from both size classes and of both sexes migrated, which indicates that neither sex nor length is a predictor of whether a sawfish will migrate or not. Although both coasts of Florida were used for migration, most individuals consistently used the same coast when they migrated. The areas surrounding Boca Grande, Cape Canaveral, and the lower Florida Keys were heavily visited sites that could be further evaluated as potential Critical Habitat for these life stages. Understanding the movement patterns of this Critically Endangered species is essential for creating policies to protect areas important for promoting growth of the population.

中文翻译：

---

大型少年和成年小齿锯齿fish鱼Pristis pectinata的大规模空间利用：对管理的影响

摘要：小齿锯鱼Pristis pectinata是大西洋特有的濒危物种。唯一已知的可行种群发生在美国佛罗里达州的沿海和巴哈马西部。关于大型少年和成年小齿锯鱼的栖息地利用和运动生态学知之甚少。尽管已经确定了关键栖息地（美国的管理称号）是针对小型少年的，但尚未确定这些生命阶段的栖息地。在2016年5月至2019年4月之间，我们使用了无源声学遥测技术和3个接收器的大数据共享网络来跟踪43个大型少年和成年小齿锯齿鱼的运动。在这项研究中，向24位女性和19位男性植入了发射机，电池寿命估计为4年或10年。在美国东南部附近，从乔治亚州不伦瑞克海岸附近的461个接收器中发现了这些带有标签的人 到较低的佛罗里达群岛，然后沿着墨西哥湾沿岸到达佛罗里达州的阿帕拉切湾。有标记的个体中有58％（43％的成熟； 57％的未成熟）进行了季节性迁移，其余的显然是其标记位置的居民。来自大小和性别的带标记的saw鱼都迁移了，这表明性别和长度都不能预测fish鱼是否会迁移。尽管佛罗里达的两个海岸都用于移民，但大多数人在迁移时始终使用同一海岸。博卡格兰德（Boca Grande），卡纳维拉尔角（Cape Canaveral）和佛罗里达下流域（Florida Keys）周边地区都是人迹罕至的地点，可以进一步评估为这些生命阶段的潜在生境。