• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine Biology: International Journal on Life in Oceans and Coastal Waters >Sequential scute growth layers reveal developmental histories of hawksbill sea turtles
【24h】

Sequential scute growth layers reveal developmental histories of hawksbill sea turtles

机译：Sequential scute growth layers reveal developmental histories of hawksbill sea turtles

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Abstract Understanding the basic life history patterns of highly migratory species is important for effective management. For sea turtles, evidence of developmental biogeography and discrete life stage residency provides key information for understanding resource use and population threats and defining conservation priorities. Resolving gaps in these knowledge areas is not straightforward, however. Inaccessible habitats, low survivorship, late maturity ages, and technology limitations all complicate monitoring individuals continuously throughout their life span. Here, we expand on previous studies and document a near-complete tissue record in the ultimate posterior marginal scutes of hawksbill sea turtle (Eretmochelys imbricata) carapace. Stable isotope analysis (SIA) of ventral scute surfaces reveals differences between three geographically isolated populations in the Pacific and Atlantic basins. Additionally, sequential sampling and SIA along growth line contours of sectioned scutes reveals developmental movements. Perhaps surprisingly, no clear or general patterns emerge. Bivariate isotope data (stable carbon, δ13C, and nitrogen δ15N) indicate that only one of six Central Pacific hawksbills showed a distinct ontogenetic shift. And while all three Western Pacific individuals showed evidence of ontogenetic shifts, these individuals had three unique patterns. We summarize regional stable isotope values for common hawksbill foraging items, discuss drivers of regional nitrogen structure, and make recommendations for future study.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号