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Variation in estuary use patterns of juvenile Chinook salmon in the Fraser River, BC 不列颠哥伦比亚省弗雷泽河幼年大鳞大麻哈鱼河口利用模式的变化
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2024-0012
David C. Scott, Lia Chalifour, Misty MacDuffee, Julia K. Baum, Terry Beacham, Eric Rondeau, Scott G. Hinch
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Juvenile Pacific salmon (Oncorhynchus spp.) use estuary habitats to varying degrees with some species and populations thought to rely heavily on these areas for early growth. In the Fraser River, British Columbia, there are 18 distinct conservation units of Chinook salmon (O. tshawytscha), and all but one is of conservation concern. Our study compares the outmigration timing, size, and habitat use of juvenile Chinook salmon in the Fraser River estuary. Over 5 years (2016–2020), we captured 6493 juvenile Chinook salmon, with 3318 sampled for stock identification. Fraser River Chinook salmon extensively used estuary habitats, but patterns varied considerably by population. Juvenile Chinook salmon from the Lower Fraser River were most abundant and present the longest, arriving the smallest in late March and early April, and captured until July. South Thompson ocean-type Chinook salmon entered the estuary later, starting to arrive in late May or early June and remaining present until mid-August. Overall, juvenile Chinook salmon varied considerably in their estuary use across populations. Understanding this variation can inform differences in productivity and guide recovery actions.
加拿大渔业与水产科学杂志》(Canadian Journal of Fisheries and Aquatic Sciences),打印前。 太平洋鲑鱼(Oncorhynchus spp.)幼鱼在不同程度上使用河口栖息地,其中一些物种和种群被认为主要依赖这些区域进行早期生长。在不列颠哥伦比亚省弗雷泽河,奇努克鲑(O. tshawytscha)有 18 个不同的保护单元,除一个单元外,其他单元均受到保护。我们的研究比较了弗雷泽河河口大鳞大麻哈鱼幼鱼的外迁时间、大小和栖息地利用情况。在 5 年的时间里(2016-2020 年),我们捕获了 6493 条幼年大鳞大麻哈鱼,其中 3318 个样本用于种群鉴定。菲沙河大鳞大麻哈鱼广泛使用河口栖息地,但不同种群的模式差异很大。来自弗雷泽河下游的大鳞大麻哈鱼幼鱼数量最多,出现时间最长,3 月底和 4 月初到达的数量最少,一直捕获到 7 月。南汤普森海洋型大鳞大麻哈鱼进入河口的时间较晚,从 5 月底或 6 月初开始到达,一直到 8 月中旬。总体而言,不同种群的大鳞大麻哈鱼幼鱼对河口的利用存在很大差异。了解这种差异可以为生产力差异提供信息,并为恢复行动提供指导。
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引用次数: 0
An integrative approach to assessing bridle shiner (Notropis bifrenatus) distribution using environmental DNA and traditional techniques 利用环境 DNA 和传统技术综合评估桥睢鱼(Notropis bifrenatus)分布的方法
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2023-0234
Lara S. Katz, Stephen M. Coghlan, Erik J. Blomberg, Michael T. Kinnison, Geneva York, Joseph D. Zydlewski
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
The bridle shiner (Notropis bifrenatus) is a small cyprinid native to the eastern United States and Canada. Bridle shiner populations have declined across their range, and the species now receives concern status or legal protection in 13 states and two provinces. Bridle shiners were historically found in southern and western Maine in densely vegetated, shallow habitats along the shorelines of streams and ponds. We surveyed areas of Maine that supported historical bridle shiner populations using environmental DNA (eDNA) and traditional seine netting methods, and then used eDNA sampling to survey areas with unknown bridle shiner presence. We rediscovered bridle shiner populations at 11 of 32 historically occupied waterbodies and documented bridle shiners in four additional waterbodies. We determined that both eDNA and seine net surveys are viable options for monitoring bridle shiners in Maine and identified ways to streamline the eDNA methods used in this study to reduce the time and cost of future surveys.
加拿大渔业与水产科学杂志》,提前印刷。 马鲛(Notropis bifrenatus)是一种原产于美国东部和加拿大的小型鲤科鱼类。桥胫鱼的种群数量在整个分布区都在下降,目前该物种在美国13个州和两个省受到关注或法律保护。缅因州南部和西部历史上曾有马鲛分布在溪流和池塘沿岸植被茂密的浅水栖息地。我们使用环境 DNA(eDNA)和传统围网方法调查了缅因州历史上曾有过桥胫鱼种群的地区,然后使用 eDNA 取样调查了桥胫鱼存在情况不明的地区。我们在 32 个历史上曾有人居住的水体中的 11 个水体重新发现了桥胫鱼种群,并在另外 4 个水体中记录了桥胫鱼。我们认为,eDNA 和围网调查都是监测缅因州桥胫鱼的可行方法,并确定了简化本研究中使用的 eDNA 方法的方法,以减少未来调查的时间和成本。
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引用次数: 0
Declines and shifts in morphological diversity of ciscoes (Coregonus spp.) in lakes Huron and Michigan, 1917–2019 休伦湖和密歇根湖鳕鱼(Coregonus spp.)形态多样性的衰退和变化,1917-2019 年
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-08-20 DOI: 10.1139/cjfas-2023-0357
Paul W. Fedorowicz, Yu-Chun Kao, Amanda S. Ackiss, Katie V. Anweiler, Andrew E. Honsey
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Ciscoes (Coregonus spp.) were historically abundant and ecologically important in Laurentian Great Lakes ecosystems. Despite well-documented declines in their abundance and taxonomic diversity, declines in morphological diversity remain understudied. This knowledge gap is especially pertinent for lakes Michigan and Huron, which have each lost six of eight historical species. Improved understanding of historical and contemporary morphological diversity of Great Lakes ciscoes can inform ongoing restoration efforts and further elucidate the factors that contributed to declines. Our goal was to characterize shifts in morphological diversity of ciscoes in lakes Michigan and Huron over a century (1917–2019). We analyzed size-corrected morphometric and meristic measurements from three periods: Early (1917–1923), Middle (1950–1972), and Contemporary (2015–2019). We then identified morphologically distinct clusters while remaining agnostic to species identifications. We found that morphological diversity and the number of distinct clusters declined over time. We then leveraged species identifications to highlight key species losses and examine morphological shifts among extant species. Our findings provide insights into the historical and contemporary morphological diversity of ciscoes and will inform restoration efforts.
加拿大渔业与水产科学杂志》,提前印刷。 鲤鱼(Coregonus spp.)尽管其数量和分类多样性的下降有据可查,但形态多样性的下降仍未得到充分研究。这一知识空白对于密歇根湖和休伦湖尤为重要,这两个湖区在历史上曾有 8 个物种,现在已分别减少了 6 个。提高对五大湖梭子鱼历史和当代形态多样性的认识,可为正在进行的恢复工作提供信息,并进一步阐明导致其数量减少的因素。我们的目标是描述密歇根湖和休伦湖一个世纪以来(1917-2019 年)鳕鱼形态多样性的变化。我们分析了三个时期的尺寸校正形态测量和分体测量结果:早期(1917-1923 年)、中期(1950-1972 年)和当代(2015-2019 年)。然后,我们确定了形态上不同的集群,同时对物种鉴定持中立态度。我们发现,随着时间的推移,形态多样性和独特聚类的数量都在下降。然后,我们利用物种鉴定来突出关键物种的消失,并研究现存物种之间的形态变化。我们的研究结果为了解梭子鱼的历史和当代形态多样性提供了见解,并将为恢复工作提供参考。
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引用次数: 0
Small pelagic fish: new frontiers in science and sustainable management 小型中上层鱼类:科学和可持续管理的新领域
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-08-01 DOI: 10.1139/cjfas-2024-0104
Christopher N. Rooper, Jennifer L. Boldt, Andres Uriarte, Cecilie Hansen, Tim Ward, Sarah Gaichas
Canadian Journal of Fisheries and Aquatic Sciences, Volume 81, Issue 8, Page 984-989, August 2024.
Small pelagic fishes occupy an important trophic role in every global aquatic ecosystem, and many species are heavily exploited by fisheries, including some of the largest and most valuable capture fisheries in the world. In November 2022, a symposium on small pelagic fish titled “Small Pelagic Fish: New Frontiers in Science and Sustainable Management” was cohosted by PICES, ICES, and FAO in Lisbon, Portugal. This special issue contains a collection of research manuscripts that explore approaches currently being used and developed to assess and manage small pelagic fishes. In particular, this issue covers topics on novel approaches to surveying small pelagic fishes, incorporating environmental covariates into management, management strategy evaluation, and aspects of the economics of small pelagic fisheries. The conclusions highlight the importance of new approaches that seek to enhance small pelagic fish surveys and ecosystem monitoring, incorporate that ecosystem information into management strategy evaluation, and predict the potential impacts of ecosystem changes on outcomes for economies and communities that rely on sustainable populations of small pelagic fishes.
加拿大渔业和水产科学杂志》第 81 卷第 8 期第 984-989 页,2024 年 8 月。 小型中上层鱼类在全球每个水生生态系统中都扮演着重要的营养角色,许多物种都被渔业大量开发,包括世界上一些最大和最有价值的捕捞渔业。2022 年 11 月,召开了题为 "小型中上层鱼类 "的小型中上层鱼类研讨会:太平洋海洋科学组织、国际海洋考察理事会和联合国粮农组织在葡萄牙里斯本共同主办了题为 "小型中上层鱼类:科学和可持续管理的新前沿 "的研讨会。这期特刊收集了一些研究手稿,探讨了目前正在使用和开发的评估和管理小型中上层鱼类的方法。特别是,本期涉及的主题包括调查小型中上层鱼类的新方法、将环境协变量纳入管理、管理策略评估以及小型中上层渔业经济学的各个方面。结论强调了新方法的重要性,这些方法旨在加强小型中上层鱼类调查和生态系统监测,将生态系统信息纳入管理战略评估,并预测生态系统变化对依赖小型中上层鱼类可持续种群的经济和社区的潜在影响。
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引用次数: 0
Synchrony of alewife, Alosa pseudoharengus, year-class strength in the Great Lakes region 大湖区金黄鲷(Alosa pseudoharengus)年级强度的同步性
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-06-20 DOI: 10.1139/cjfas-2023-0322
Les D. Warren, Andrew E. Honsey, David B. Bunnell, Paris D. Collingsworth, Darryl W. Hondorp, Charles P. Madenjian, David M. Warner, Brian C. Weidel, Tomas O. Hӧӧk
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Fish recruitment is interannually variable and challenging to predict. Annual recruitment is often regionally synchronized among populations and identifying drivers of such synchrony may help shed light on recruitment dynamics. We investigated interannual variation of alewife Alosa pseudoharengus recruitment by estimating year-class strength for populations from three of the Laurentian Great Lakes (lakes Huron, Michigan, and Ontario) using annual assessment survey data from 1968 to 2022. We first determined the age when year-class strength was set for each dataset. We then used a mixed-modeling approach incorporating age, year-class, and sampling year to estimate year-class strength for each study lake. Thereafter, we evaluated regional synchrony in year-class strength across the three lakes and evaluated potential climatic drivers of synchrony. Our results suggest that alewife year-class strength is set by age-1. Our model-derived indices of alewife year-class strength were synchronized among the three lakes, and we identified spring-summer degree-days as a potential regional driver of synchrony. This analysis highlights the potential for strong influence of climatic conditions on fish recruitment in large freshwater systems.
加拿大渔业和水产科学杂志》(Canadian Journal of Fisheries and Aquatic Sciences),提前印刷。 鱼类的繁殖在年际间变化不定,预测难度很大。不同种群之间的年度招募通常具有区域同步性,确定这种同步性的驱动因素可能有助于揭示招募动态。我们利用 1968 年至 2022 年的年度评估调查数据,估算了劳伦伦三大湖(休伦湖、密歇根湖和安大略湖)种群的年级强度,从而研究了金黄鲷(Alosa pseudoharengus)招募的年际变化。我们首先确定了每个数据集设定年级强度的年龄。然后,我们使用混合建模方法,结合年龄、年级和采样年份来估计每个研究湖泊的年级强度。之后,我们评估了三个湖泊中年级强度的区域同步性,并评估了同步性的潜在气候驱动因素。我们的结果表明,金目鲷的年级强度是由 1 年龄决定的。我们的模型得出的金线鲃年级强度指数在三个湖泊之间是同步的,我们发现春夏度日是导致同步性的潜在区域驱动因素。这项分析凸显了气候条件对大型淡水系统中鱼类繁殖的潜在强大影响。
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引用次数: 0
Potential of communication devices for estimating the fishing effort of purse seine fleets 通信设备在估算围网船队捕捞作业量方面的潜力
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-06-18 DOI: 10.1139/cjfas-2023-0291
Tsoi Kwan Chui, Nobuyuki Yagi, Yutaro Sakai
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Fishing impacts the marine environment significantly, and quantifying this impact requires precise fishing effort data. This study explores the challenges associated with accurately estimating fishing effort by purse seiners and proposes a solution using records collected from real-time communication devices on fishing fleets. The estimation of fishing effort based on high-frequency GPS data can be verified with the onboard visual records. Additionally, by linking vessels within a fleet, the method utilizes information from carriers (vessels that transport fish) to enhance the estimation. Through the use of generalized additive models, this study effectively estimates the fishing effort of Japanese purse seiners, demonstrating their accuracy. Furthermore, by incorporating carrier information, models based on matched records prove to have superior predictive performance compared to those based on fishing vessel or carrier records alone. These findings lay the foundation for the potential of this approach to provide precise and cost-effective information for sustainable fishery management. The affordability of GPS devices and the common requirement of communication devices across various fleets further support the feasibility of implementing this approach.
加拿大渔业和水产科学杂志》,提前印刷。 捕鱼对海洋环境有重大影响,而量化这种影响需要精确的捕鱼努力量数据。本研究探讨了准确估算围网渔船捕捞作业量所面临的挑战,并提出了一种利用渔船队实时通讯设备收集的记录进行估算的解决方案。基于高频 GPS 数据的渔捞努力量估算可通过船上可视记录进行验证。此外,通过将船队中的船只联系起来,该方法还可利用运输船(运输鱼类的船只)的信息来加强估算。通过使用广义相加模型,本研究有效地估算了日本围网渔船的捕捞作业量,证明了其准确性。此外,通过纳入承运商信息,基于匹配记录的模型被证明比仅基于渔船或承运商记录的模型具有更优越的预测性能。这些发现为这一方法为可持续渔业管理提供精确和具有成本效益的信息奠定了基础。全球定位系统设备的可负担性和各种船队对通信设备的共同要求进一步支持了实施这种方法的可行性。
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引用次数: 0
On the need to avoid apple-to-orange comparisons in microplastic research 在微塑料研究中需要避免 "苹果与橙子 "之间的比较
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-06-04 DOI: 10.1139/cjfas-2023-0325
Albert A. Koelmans, Todd Gouin, Alvine C. Mehinto, Scott Coffin
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Here, we discuss several key issues in the recent microplastic risk assessment conducted by Hataley et al. (2023. Can. J. Fish. Aquat. Scie 80 (10): 1669-1678) for the Great Lakes ecosystem. First, we note that the risk characterizations are incorrect due to errors in parameterizations of the calculations necessary to align exposure and effects data, as well as the corrections for bioaccessibility cutoffs. Second, the lack of quantification of uncertainty in the risk assessment raises concerns. Previous assessments that employed similar methods addressed uncertainties arising from the calculations, revealing that the probabilistic uncertainty inherent in risk characterization can span significant magnitudes. Third, we highlight the problematic use of species sensitivity distributions (SSDs) designed for marine systems in a freshwater context. We emphasize the importance of utilizing SSDs that incorporate relevant freshwater species data, and identify recent studies that provide such data for use in future risk assessments. Based on a previously published assessment, we suggest initiating measures to reduce the release of plastic debris into the watershed and advise research, monitoring, and mitigative strategies to address potential threats to water quality.
加拿大渔业和水产科学杂志》,提前出版。 在此,我们讨论 Hataley 等人最近进行的微塑料风险评估中的几个关键问题(2023.Can.J. Fish.Aquat.Scie 80 (10):1669-1678)对五大湖生态系统进行的风险评估中的几个关键问题。首先,我们注意到风险特征描述不正确,这是由于将暴露和影响数据统一起来所需的计算参数以及生物可及性临界值的校正出现了错误。其次,风险评估中缺乏对不确定性的量化引起了人们的关注。以前采用类似方法进行的评估对计算中出现的不确定性进行了处理,揭示了风险特征描述中固有的概率不确定性可以达到很大的量级。第三,我们强调了在淡水环境中使用为海洋系统设计的物种敏感性分布(SSDs)存在的问题。我们强调了使用包含相关淡水物种数据的 SSD 的重要性,并确定了提供此类数据供未来风险评估使用的最新研究。根据之前公布的评估结果,我们建议采取措施减少塑料碎片向流域的排放,并建议采取研究、监测和缓解策略来应对水质面临的潜在威胁。
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引用次数: 0
Developing management plans for sprat (Sprattus sprattus) in the Celtic Sea to advance the ecosystem approach to fisheries 制定凯尔特海鲱鱼(Sprattus sprattus)管理计划,推进渔业生态系统方法
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-05-31 DOI: 10.1139/cjfas-2023-0090
Laurence T. Kell, Jacob W. Bentley, David A. Feary, Afra Egan, Cormac Nolan
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Sprat are commercially valuable and are an important component of the North-East Atlantic ecosystem as major predators of zooplankton, competitors with herring, and prey for piscivorous fish, marine mammals, and seabirds. Despite this, insufficient information exists for Celtic Seas sprat, one of five North-East Atlantic stocks, to estimate stock status. To ensure the sustainable exploitation of sprat, the health of the Celtic Seas ecosystem, and the wider fisheries sector, we conduct a management strategy evaluation to stress test the current single-species advice framework. The aim is to evaluate whether ecosystem objectives can be achieved under single-species maximum sustainable yield and precautionary advice frameworks. An operating model was conditioned on life history theory and strategic information from ecosystem models. We showed that in-year advice using an empirical rule could achieve management objectives and help balance the trade-offs between fishing activities and ecosystem health. The approach allows ecosystem understanding to be incorporated within existing precautionary and maximum sustainable yield frameworks to provide a robust management framework that can meet multiple objectives despite uncertainty.
加拿大渔业和水产科学杂志》,提前印刷。 鲱鱼具有商业价值,是东北大西洋生态系统的重要组成部分,是浮游动物的主要捕食者、鲱鱼的竞争者以及食鱼类、海洋哺乳动物和海鸟的猎物。尽管如此,作为东北大西洋五个种群之一的凯尔特海鲱的信息仍不足以估计种群状况。为确保鲱鱼的可持续开发、凯尔特海生态系统的健康以及更广泛的渔业部门,我们开展了一项管理策略评估,对当前的单一物种建议框架进行压力测试。目的是评估在单一物种最大持续产量和预防性建议框架下是否能实现生态系统目标。运行模型以生命史理论和生态系统模型的战略信息为条件。我们的研究表明,使用经验规则的年内建议可实现管理目标,并有助于平衡渔业活动与生态系统健康之间的权衡。该方法可将对生态系统的理解纳入现有的预防性和最大可持续产量框架,从而提供一个稳健的管理框架,在不确定的情况下实现多重目标。
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引用次数: 0
Quantifying uncertainty when extrapolating the relationship between snorkel counts and mark-recapture estimates of juvenile salmonids 在推断潜标计数与标记重捕估计幼年鲑鱼之间的关系时量化不确定性
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-05-30 DOI: 10.1139/cjfas-2023-0085
Matthew R. Falcy, Ronald J. Constable
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Snorkel surveys are frequently used to monitor stream-dwelling fish. Inferring local abundance from snorkel surveys is complicated by two primary factors: variable fish detection probabilities and the relative abundance of fish in habitat types below the recommended minimum depth for snorkeling. We examine these factors across three salmonid species (Oncorhynchus spp.), 4 years, and 113 location-years in Oregon coastal streams. We calibrate snorkel counts to mark-recapture estimates and develop mathematically explicit expressions that convert a new snorkel count into a probability density of abundance for streams containing mixed habitat types that were and were not snorkeled. Snorkelers detected 63%, 47%, and 39% of juvenile coho salmon (Oncorhynchus kitsutch), steelhead trout (Oncorhynchus mykiss), and cutthroat trout (Oncorhynchus clarkii clarkia) estimated by mark-recapture, respectively, but uncertainty within and among sampling units was high. Further, analytics developed here can be used to infer abundance and uncertainty for habitat types that were not snorkeled. Our quantification of uncertainty arising from using snorkel counts as a proxy for abundance will help managers balance biological risks with available resources.
加拿大渔业和水产科学杂志》,提前印刷。 浮潜调查常用于监测溪流栖息鱼类。从浮潜调查中推断当地鱼类丰度因两个主要因素而变得复杂:不同的鱼类探测概率和低于建议浮潜最小深度的栖息地类型中鱼类的相对丰度。我们研究了俄勒冈州沿海溪流中三种鲑鱼(Oncorhynchus spp.)、4 年和 113 个地点年的这些因素。我们将浮潜计数与标记重捕估计值进行了校准,并开发了数学表达式,可将新的浮潜计数转换为包含混合栖息地类型的溪流的丰度概率密度,这些栖息地类型有浮潜的,也有未浮潜的。潜泳者分别探测到了 63%、47% 和 39% 通过标记重捕估算的幼年科霍鲑(Oncorhynchus kitsutch)、钢鳟(Oncorhynchus mykiss)和切喉鳟(Oncorhynchus clarkii clarkia),但采样单元内部和采样单元之间的不确定性很高。此外,本文开发的分析方法可用于推断未进行浮潜的生境类型的丰度和不确定性。我们对使用潜标计数作为丰度代表所产生的不确定性进行量化,将有助于管理者平衡生物风险与可用资源。
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引用次数: 0
Correction: Towards a management strategy for microplastic pollution in the Laurentian Great Lakes—ecological risk assessment and management (part 2) 更正:制定劳伦森大湖微塑料污染管理战略--生态风险评估和管理(第 2 部分)
IF 2.4 2区 农林科学 Q2 FISHERIES Pub Date : 2024-05-29 DOI: 10.1139/cjfas-2023-0346
Eden K. Hataley, Hayley K. McIlwraith, Dimple Roy, Chelsea M. Rochman
Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
加拿大渔业和水产科学杂志》,提前印刷。
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引用次数: 0
期刊
Canadian Journal of Fisheries and Aquatic Sciences
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