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Source areas of Blue‐winged Teal harvested in Ontario and Prairie Canada based on stable isotopes: implications for sustainable management
Journal of Field Ornithology ( IF 0.9 ) Pub Date : 2020-02-14 , DOI: 10.1111/jofo.12324
Matthew D. Palumbo 1 , Jackson W. Kusack 1, 2 , Douglas C. Tozer 1 , Shawn W. Meyer 3 , Christian Roy 4 , Keith A. Hobson 2, 5
Affiliation  

Determining the source areas of harvested individuals is important for effective conservation and management of migratory game birds. Banding has provided much information about source areas, but obtaining samples of marked individuals representative of all potential breeding areas is difficult for most species. To add to previous knowledge of harvest derivation based on banding data and to assist with regulatory decisions, we used stable hydrogen isotope (δ2H) techniques to estimate natal and molt source areas of Blue‐winged Teal (Spatula discors) harvested in southern Canada in 2014 and 2017. We found that most birds harvested in southern Saskatchewan, southern Manitoba, northern Ontario, and southern Ontario likely originated in the prairie and boreal plains regions of Canada and the United States, which is the core production area for the species. Based on feather δ2H values, some birds harvested in Ontario may have also originated in Ontario. Our results differ from those of a long‐term analysis of band recovery data that revealed that most Blue‐winged Teal harvested in Ontario originated in the eastern part of the province and areas along the lower Great Lakes and southwestern Quebec. We found that nearly all birds harvested in Ontario in our study likely originated from areas north and west of the province. Together, banding and stable isotopes likely provide the best information available on source areas of harvested birds for regulatory decision making.

中文翻译:

基于稳定同位素在安大略省和加拿大大草原收获的蓝翅蓝绿色蓝藻的来源地区:对可持续管理的影响

确定收获个体的来源区域对于有效保护和管理候鸟至关重要。条带化提供了许多有关源区域的信息,但是对于大多数物种而言,要获得代表所有潜在繁殖区的标记个体的样本很难。要添加到基于条带数据,并协助监管决策的收获推导以前的知识,我们用稳定的氢同位素(δ 2 2H)技术来估计蓝水鸭的产前和蜕皮源区域(锅铲discors)于2014年和2017年在加拿大南部收获。我们发现大部分在萨斯喀彻温省南部,曼尼托巴南部,安大略省北部和安大略南部收获的鸟类可能起源于加拿大和美国的大草原和北方平原地区该物种的面积。基于羽毛δ 2H值表示,一些在安大略省收获的鸟类可能也起源于安大略省。我们的结果与对波段恢复数据进行的长期分析的结果不同,后者发现,在安大略省收获的大多数蓝翅蓝绿色蓝绿色蓝藻起源于该省东部以及大湖下游和魁北克西南部地区。我们发现,在我们的研究中,安大略几乎所有收获的鸟类都可能来自该省北部和西部。条带化和稳定同位素共同提供了有关已采集鸟类来源区域的最佳信息,可用于监管决策。
更新日期:2020-02-14
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