Occupancy, movement, and behaviour of namew (lake sturgeon Acipenser fulvescens) in an intact river in Canada

IF 2.6 2区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION
Claire E. Farrell, Jennifer Simard, Stan Louttit, F. Meg Southee, Liset Cruz-Font, Daniel P. Struthers, Jacob L. Seguin, Constance M. O’Connor
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引用次数: 0

Abstract

ABSTRACT: Most sturgeon populations are imperilled and living in fragmented rivers. Here, we studied namew (lake sturgeon Acipenser fulvescens), fish important to Ililiwak (Moose Cree Peoples), in the North French River: a free-flowing, intact river in Kit Aski Nahnuun (the Moose Cree Homeland) in northern Ontario, Canada. This study was co-created alongside members of Moose Cree First Nation and used acoustic telemetry to passively track 20 tagged namew over 6 yr (2016-2022). Namew occupied the entire monitored river reach: about 45 km. Namew used 2 overwintering areas and occupied more overall river sections during spring and summer (out of 6 total seasons often used by Ililiwak). We did not detect namew moving upstream or downstream during freeze-up and winter. Generally, namew showed the greatest acceleration and travelled the longest distances during spring and summer, and they occupied shallower water during summer at lower water levels and deepest waters during freeze-up. We found an interaction between season and diurnal period, where namew occupied shallower depths and had higher acceleration at dawn and night relative to morning and afternoon in most seasons; dusk behaviour was variable among seasons. However, this pattern was absent in spring, when namew showed no diurnal pattern in acceleration and were in shallower water during morning and afternoon. Diurnal patterns were less pronounced, but detectable, during ice-affected seasons. This river provides year-round habitat for namew, and our data reveal distinct patterns of namew occupancy, movement, and behaviour in a free-flowing, intact river. Our work is an example of successfully co-creating research that addresses both scientific and community priorities.
加拿大一条完整河流中湖鲟鱼(Acipenser fulvescens)的栖息、移动和行为
摘要:大多数鲟鱼种群濒临灭绝,生活在支离破碎的河流中。在这里,我们对加拿大安大略省北部基特阿斯基纳努恩(穆斯克里人的故乡)的北法国河中对伊利里瓦克人(穆斯克里人)非常重要的鱼类--namew(湖鲟 Acipenser fulvescens)进行了研究。这项研究是与穆斯克里第一民族的成员共同创建的,使用声学遥测技术对 20 只被标记的 "Namew "进行了为期 6 年(2016-2022 年)的被动追踪。Namew占据了整个监测河段:约45公里。蝾螈使用了 2 个越冬区域,并在春季和夏季(伊利里瓦克经常使用的总共 6 个季节中)占据了更多的总体河段。在冰冻期和冬季,我们没有发现 "namw "向上游或下游移动。一般来说,蝾螈在春季和夏季的加速度最大、移动距离最远,它们在夏季水位较低时占据较浅的水域,而在结冰期占据最深的水域。我们发现,季节与昼夜周期之间存在交互作用,在大多数季节中,裸鲤在黎明和夜间占据的水深较浅,加速度相对于上午和下午更高;黄昏时的行为在不同季节有所不同。然而,这种模式在春季并不存在,因为在春季,裸鲤的加速度没有昼夜模式,并且在上午和下午都在较浅的水域中。在受冰雪影响的季节,昼夜模式不太明显,但也能探测到。这条河流全年都能为裸鲤提供栖息地,我们的数据揭示了裸鲤在自由流动的完整河流中的栖息、移动和行为模式。我们的工作是成功开展共同研究的范例,既解决了科学问题,又解决了社区的优先事项。
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来源期刊
Endangered Species Research
Endangered Species Research BIODIVERSITY CONSERVATION-
CiteScore
5.50
自引率
6.50%
发文量
38
审稿时长
31 weeks
期刊介绍: ESR is international and interdisciplinary. It covers all endangered forms of life on Earth, the threats faced by species and their habitats and the necessary steps that must be undertaken to ensure their conservation. ESR publishes high quality contributions reporting research on all species (and habitats) of conservation concern, whether they be classified as Near Threatened or Threatened (Endangered or Vulnerable) by the International Union for the Conservation of Nature and Natural Resources (IUCN) or highlighted as part of national or regional conservation strategies. Submissions on all aspects of conservation science are welcome.
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