与密歇根湖绿湾直接相连的两条河流中鲟鱼(Acipenser fulvescens)幼虫漂移的垂直模式

IF 0.7 4区 农林科学 Q4 FISHERIES Journal of Applied Ichthyology Pub Date : 2023-10-21 DOI:10.1155/2023/6619373
Patrick S. Forsythe, Dave A. Lawrence, Ashok Ragavendran, Kari McClellan, Miguel A. Ortiz, Tanna M. Dittmar, Robert F. Elliott, Michael C. Donofrio
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引用次数: 0

摘要

河流环境中的鱼苗在孵化时经常从卵沉积区分散(如漂流)。漂流的几个组成部分对生存很重要,包括时间、在水柱中的分布和身体大小。湖鲟(Acipenser fulvescens)幼鱼从上游产卵地漂移的纵向和横截面方面已经得到了大量的研究。然而,对于湖鲟幼虫在水体中的垂直分布,还没有从河流大小、水深、整个漂流期间的漂流幼虫大小以及沿河底采集幼虫的传统采样装置(d -框架网)的有效性等方面进行综合评价。2013年,我们在美国威斯康辛州的Menominee河和occonto河上游产卵地点对漂流的湖鲟幼虫进行了采样,使用了传统的d框架网和定制的制作采样网,这些采样网垂直划分了水柱。在两个系统中均观察到湖鲟幼虫从河底向水柱顶部漂移。垂直网段是幼虫总捕获量的重要预测因子,在水柱中心的网段捕获量最高,但取决于网段在河流横截面内的位置和与产卵地点的下游距离。在两条河上捕获的42%的幼虫超出了传统d型网的采样能力(即鱼会漂过顶部)。试图描述湖鲟以及其他在幼虫传播过程中表现出漂移的鱼类的幼虫产量的研究,需要考虑在渔网设计和采样河流的垂直/横截面剖面之间取得平衡。基于尺寸的垂直漂移也可能对寻求估计遗传参数(例如,多样性和亲缘关系)的研究产生影响。
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Vertical Patterns in Lake Sturgeon (Acipenser fulvescens) Larval Drift within Two Rivers Directly Connected to Green Bay, Lake Michigan
Fish larvae in riverine environments often disperse (e.g., drift) from areas of egg deposition at the time of hatch. Several components of drift can be important in terms of survival including timing, distribution in the water column, and body size. The longitudinal and cross-sectional aspects of larval lake sturgeon (Acipenser fulvescens) drift from upstream spawning sites have received considerable study. However, the vertical distribution of larval lake sturgeon in the water column has not been comprehensively evaluated with respect to river size, water depth, the size of larvae in drift over the entire drift period, and the effectiveness of traditional sampling gear (D-frame nets) designed to collect larvae along the river bottom. In 2013, we sampled larval lake sturgeon drifting from upstream spawning sites in the Menominee and Oconto Rivers (Wisconsin, USA) using traditional D-frame nets and custom fabricated sampling nets that vertically partitioned the water column. Drifting larval lake sturgeon were observed from the river bottom to the top of the water column in both systems. Vertical net section was a significant predictor of total larval catch with the highest catch occurring in nets towards the center of the water column but was dependent on net location within the rivers’ cross section and downstream distance from spawning locations. 42% of larvae captured across both rivers were outside of the sampling capability of the traditional D-frame nets (i.e., fish would have drifted over the top). Studies seeking to describe larval production for lake sturgeon, as well as other fish species that exhibit drift in larval dispersal, need to consider a balance between net design and sampling the vertical/cross sectional profiles of rivers. Size-based vertical drift may also have consequences for studies seeking to estimate genetic parameters (e.g., diversity and parentage).
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来源期刊
Journal of Applied Ichthyology
Journal of Applied Ichthyology 生物-海洋与淡水生物学
CiteScore
2.30
自引率
11.10%
发文量
73
审稿时长
3-8 weeks
期刊介绍: The Journal of Applied Ichthyology publishes articles of international repute on ichthyology, aquaculture, and marine fisheries; ichthyopathology and ichthyoimmunology; environmental toxicology using fishes as test organisms; basic research on fishery management; and aspects of integrated coastal zone management in relation to fisheries and aquaculture. Emphasis is placed on the application of scientific research findings, while special consideration is given to ichthyological problems occurring in developing countries. Article formats include original articles, review articles, short communications and technical reports.
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