...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>North American Journal of Fisheries Management >Isotopic Structure of Lake Whitefish in Lake Huron: Evidence for Regional and Local Populations Based on Resource Use
【24h】

Isotopic Structure of Lake Whitefish in Lake Huron: Evidence for Regional and Local Populations Based on Resource Use

机译：休伦湖湖白鲑的同位素结构：基于资源使用的区域和当地人口的证据

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lake Whitefish Coregonus clupeaformis is the most commercially valuable species in Lake Huron. The fishery for this species has historically been managed based on 25 management units (17 in Canada, 8 in the USA). However, congruence between the contemporary population structure of LakeWhitefish and management units is poorly understood. We used stable isotopes of carbon (delta C-13) and nitrogen (delta N-15), food web markers that reflect patterns in resource use (i.e., prey, location, habitat), to assess the population structure of spawning-phase Lake Whitefish collected from 32 sites (1,474 fish) across Lake Huron. We found large isotopic variation among fish from different sites (ranges: delta C-13 = 10.2 parts per thousand, delta N-15 = 5.5 parts per thousand) and variable niche size and levels of overlap (standard ellipse area = 1.0-4.3 parts per thousand(2)). Lake Huron contained spawning-phase fish from four major isotopic clusters largely defined by extensive variation in delta C-13, and the isotopic composition of fish sampled was spatially structured both within and between lake basins. Based on cluster compositions, we identified six putative regional groups, some of which represented sites of high diversity (three to four clusters) and others with less (one to two clusters). Analysis of isotopic values from Lake Whitefish collected from summer feeding locations and baseline prey items showed similar isotopic variation and established spatial linkage between spawning-phase and summer fish. Our results show that summer feeding location contributes strongly to the isotopic structure we observed in spawning-phase fish. One of the regional groups we identified in northern Georgian Bay is highly distinct based on isotopic composition and possibly ecologically unique within Lake Huron. Our findings are congruent with several previous studies using different markers (genetics, mark-recapture), and we conclude that current management units are generally too small and numerous to reflect the population structure of Lake Whitefish in Lake Huron.
机译：莱特湖Coregonus Clupeaformis是休伦湖中最具商业化的物种。该物种的渔业历史上基于25个管理单位（加拿大17位，美国8号）管理。但是，当代人口结构与莱克鱼鱼和管理单位之间的一致性很差。我们使用碳（Delta C-13）和氮（Delta N-15）的稳定同位素，食物网标记反映资源使用的模式（即猎物，位置，栖息地），评估产卵期湖泊的人口结构白鲑从赫尔尔湖的32个站点（1,474条鱼）收集。我们发现来自不同部位的鱼类的大同位素变异（范围：Delta C-13 = 10.2份每千份，Delta N-15 = 5.5份）和可变的利基尺寸和重叠水平（标准椭圆区域= 1.0-4.3份每千（2））。 Huron Lake Huron含有来自四个主要同位素簇的产卵期鱼类，主要由Delta C-13的广泛变异而定义，并且在湖盆地之间和之间的鱼类的同位素组成在空间上结构。基于集群组成，我们确定了六个推定的区域集团，其中一些占高多样性（三到四个集群）和其他（一到两个集群）的占地面议的网站。从夏季饲养地点收集的白鱼的同位素价值分析，基线猎物项目显示出类似的同位素变异，并在产卵期和夏季鱼之间建立的空间联动。我们的研究结果表明，夏季饲养位置强烈为我们在产卵期鱼中观察到的同位素结构有助于。我们在格鲁吉亚北部境内确定的区域群体之一，基于同位素组成，在休伦湖中可能生态上独一无二。我们的调查结果与使用不同标志物（遗传学，标志 - 重新夺回）的几项研究，我们得出结论，目前的管理单位通常太小，众多，以反映赫尔湖湖白鲑人口结构。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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