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在努纳维克的北极焦炭岩海洋迁徙频率的耳石推断模式

Julien Mainguy¹, Ariel Arsenault¹, Lilian Tran²

¹Direction de l'expertise sur la faune aquatique, ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs, Québec, Québec, Canada.

Journal of fish biology

|June 23, 2023

概括

北极鱼在第一次航行后表现出每年海上迁徙的强烈倾向,而跳过的迁徙很少见. 由于当地人口的波动,这种一致的迁徙行为会影响渔业管理.

科学领域:

生态生态学生态生态学
鱼类学鱼类学鱼类学
进化生物学进化生物学

背景情况:

鱼类表现出多样化的迁徙行为,从淡水居住到完全 anadromy.
北极 (Salvelinus alpinus) 由于生理上的限制,通常在淡水中过冬,因此海上迁徙是可选的.
有限的数据存在于北极菌种群中跳过迁移的频率.

研究的目的:

确定在北克省努纳维克的两个北极鱼种群中第一次迁徙的年龄和随后每年迁徙的频率.
调查北极的迁徙策略的一致性及其对人口动态的影响.

主要方法:

用 (88Sr) 追踪淡水和海洋息地使用的耳石微化学.
分析年 (64Zn) 振荡以确定年龄.
从Deception Bay (Salluit) 和Hopes Advance Bay (Aupaluk) 河流系统中采集北极石灰岩的样本.

主要成果:

两种群体第一次迁移时的模式年龄为4岁以上,范围广泛 (0岁以上至8岁以上).
跳过的迁移很少发生,Salluit的97.7%和Aupaluk charr的95.6%在启动后表现出不间断的年度迁移.
在当前的环境条件下,持续的年度迁移表明了显著的健康益处.

结论:

努纳维克的北极菌种群显示出对持续的年度海上迁徙的高度倾向.
一致的迁徙行为意味着强大的适应性价值,由当前的环境条件维持.
由于由迁移模式和低地点忠实性驱动的跨年丰度变化,渔业管理在监测北极鱼方面面临挑战.

关键词:

生命史生命史的人生史迁移的战术迁移的战术奥托利特的微化学学这些是鱼类的鱼类.是的组成部分.,和的使用情况.

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