PDF HTML阅读 XML下载 导出引用 引用提醒 5种鱼类标志对草鱼临界游泳速度的影响 DOI: 作者: 作者单位: 1. 西南大学 生命科学学院, 重庆 400715;2. 农业部长江中上游渔业资源环境科学观测实验站, 中国水产科学研究院 长江水产研究所, 湖北 武汉 430223 作者简介: 俞立雄(1991-),男,博士研究生,专业方向为渔业资源.E-mail:568264442@qq.com 通讯作者: 中图分类号: S917 基金项目: 国家自然科学基金项目（51579247）；科技部支撑计划项目（2015BAD13B02） Effect of five tagging methods on critical swimming speed of grass carp, Ctenopharyngodon idellus Author: Affiliation: 1. Faculty of Life Sciences, Southwest University, Chongqing 400715, China;2. Key Field Experimental Station for Scientific Observation of Fishery Resources and Environment of the Middle and Upper Reaches of the Yangtze River, Ministry of Agriculture; Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:采用被动整合雷达标志法（PIT）、切鳍标记、荧光标记、超声波标志和T型标志这5种标志方法对草鱼（）进行标记后，测定其临界游泳速度，研究5种不同标记对草鱼游泳能力的影响。将试验草鱼按不同体长分为3组：15~18 cm，18~21 cm，21~25 cm，每个体长组均设置对照组，并分别进行以上5种鱼类标志，测量标志后草鱼的绝对临界游泳速度和相对临界游泳速度。采用SPSS17.0统计软件进行数据的分析比较。研究结果表明，随着体长增加，草鱼的绝对临界游泳速度增大，相对临界游泳速度减小；超声波标志对3个体长组草鱼的临界游泳速度均有极显著影响（<0.01），标志后草鱼绝对临界游泳速度分别下降18.72%、16.40%、23.15%，相对临界游泳速度分别下降18.95%、17.78%、21.86%；T型标志对15~18 cm体长组草鱼的临界游泳速度有极显著性影响（<0.01），标志后草鱼绝对临界游泳速度下降8.35%，相对临界游泳速度下降9.30%，对体长大于18 cm的草鱼无显著性影响；PIT标志、切鳍标记和荧光标记对这3个体长组草鱼的临界游泳速度均无显著性影响（>0.05）。 Abstract:This research assessed the effect of five tagging methods: namely, PIT marking, fin amputation marking, fluorescent marking, ultrasound marking and T-type marking, on the critical swimming speed of grass carp . Grass carp with a body length of 15-25 cm (standard length, SL) were divided into three size groups: short body length (15-18 cm), medium body length (18-21 cm) and long body length (21-25 cm). Critical swimming speed was measured for 144 fish in an annular flume with a water temperature of (16±1)℃. SPSS17.0 software was used for data processing. The results showed that the absolute critical swimming speed of the grass carp tended to increase, while the relative critical swimming speed tended to decrease along with an increasing body length. Ultrasonic tagging showed a significant impact (<0.01) on the swimming ability of the fish in all size groups (body length 15-25 cm). The absolute critical swimming speed of the grass carp in each of the three size groups (short, medium, large) decreased by 18.72%, 16.40% and 23.15%, respectively, after ultrasound tagging, and the relative critical swimming speed of the three groups decreased by 18.95%, 17.78% and 21.86%, respectively. T-type tagging also showed a significant impact (<0.01) on the swimming ability of grass carp in the short body length group: their absolute critical swimming speed decreased by 8.35%, whereas their relative critical swimming speed decreased by 9.30%. No significant impact of T-type tagging was detected on the critical swimming speed of grass carp with a medium or long body length (18-25 cm). Finally, no significant impact on swimming speed was detected for fish with a PIT tag, fin amputation marking or fluorescent tag. 参考文献 相似文献 引证文献
The complete mitogenome sequence of Glyptothorax laosensis was determined using long PCR reactions. The genome is 16 539 bp in length, including 13 typical vertebrate protein-coding genes, 22 transfer RNA genes, 2 ribosomal RNA genes and a control region. Except for eight tRNA and ND6 genes, all other mitochondrial genes are encoded on the heavy strand. The gene order and composition of G. laosensis was similar to that of most other vertebrates. The descending order of the base composition on heavy strand was 31.3% A, 27.5% C, 25.9% T, 15.3% G, with a relatively lower level of G and a slight AT bias of 57.2%. The results of phylogenetic reconstruction showed G. laosensis is the sister group with G. trilineatus (Figure 1), and the Glyptothorax genus formed a monophyletic group.
Gobiobotia filifer is a small benthic fish distributed in Yangtze River Basin. The abundance of G. filifer increased after impoundment of Xiluodu Dam and Xiangjiaba Dam. The state of population structure and changes of genetic diversity before and after impoundment of Xiluodu Dam and Xiangjiaba Dam were interesting issues. However, efficient molecular markers were rare, which will limit us to solve above problems. Twenty-eight expressed sequence tag SSRs (EST-SSRs) were successfully identified and verified as stable amplification and polymorphic loci by polyacrylamide gel electrophoresis (PAGE) and capillary electrophoresis. The number of alleles at these EST-SSR loci ranged from 3 to 14, the polymorphism information content values were 0.125–0.897, and the observed and expected heterozygosities were 0.0–0.857 and 0.132–0.928, respectively. Cross-species amplification of the 28 loci developed in this study was examined in seven individuals of each of the 7 taxa. The amplification efficiency of 28 EST-SSRs primer pairs is related to the distance of genetic relationship between cross-species with G. filifer, and same subfamily species (Xenophysogobio boulengeri and Xenophysogobio nudicorpa) showed the highest (50%) amplification efficiency. These EST-SSR markers could be used to analyse genetic diversity and population structure of G. filifer and related species.
River–lake interaction is important for maintaining biodiversity, yet it is vulnerable to hydrological alteration. The connectivity of the channel connecting Poyang Lake and the Yangtze River not only ensures the regular migration of fish but also makes Poyang Lake a feeding and fattening ground for them. Unfortunately, human activities have dramatically changed the hydrodynamic conditions of Poyang Lake, which is experiencing severe drought due to the obvious decline in the water level in autumn and winter, especially since 2003. However, the possible impacts of the changes in the water level on the habitats of migratory fish remain unclear due to the limitation of traditional techniques in spatiotemporal analysis. Here, we combined a hydrodynamic model and habitat suitability model to simulate variations in the suitable habitat area and their connectivity under different water-level conditions. The conditions for the migration pathway of the target fish were obtained by a hydroacoustic survey using the Simrad EY60 echosounder. The results showed that the change in water level will significantly affect the spatiotemporal change in the suitable habitats and their connectivity. In particular, we found the existence of two thresholds that play a dominant role in illuminating the connectivity of effective suitable habitats (HC). Firstly, the maximum value of the weighted usable area (WUA) and HC can be achieved when the water level is more than 16 m. Secondly, when the water level is between 10 and 16 m, the changes in the HC are sensitive and rapid, and the area flooded at this stage is called the sensitive area. HC is a crucial element in fish migration and habitat conditions. Under the condition of continuous drought in the middle reaches of the Yangtze River, our research contributes to clarifying the influence of water level on key habitats for fish and optimizes the practice of river–lake ecological management.
The Yangtze River has experienced severe ecological degradation due to intensive human activities, including dam construction, land reclamation, and overfishing. These disturbances have disrupted the natural habitats of the Yangtze River, leading to a sharp decline in fish biodiversity and fishery resources. To address this ecological crisis, the Chinese government implemented a 10-year fishing ban in January 2021 to mitigate pressures on fish populations, restore aquatic habitats, and promote biodiversity recovery. The middle reaches of the Yangtze River are characterized by diverse fish species and a critical habitat for aquatic life, this study seeks to assess the effects of the fishing ban on fish diversity, body structure, population and community dynamics in this region. Fish monitoring data collected from 2017–2019 (pre-ban) and 2021–2023 (post-ban) were analyzed to evaluate changes in fish body size, species diversity, and community structure. The analysis results using the PSD method indicate that fish body size has increased following the fishing ban, suggesting the improvement of population structures, and a change in the complexity of food web structure. Species diversity indices showed partial recovery, but the recovery was uneven across different sampling sites. While fish populations showed signs of improvement, particularly in terms of body size and community stability, species diversity remained at relatively low levels in some areas, indicating that full recovery in biodiversity and resource levels may require extended conservation efforts. These findings suggest that while the fishing ban has had a positive initial impact on fish populations and ecological conditions, continued and long-term conservation measures are essential for fully recovering the river’s biodiversity and restoring its fishery resources. The study also highlights the importance of monitoring fish species diversity, body structure, and community dynamics as part of ongoing efforts to evaluate the effectiveness of the fishing ban and refine resource management strategies for the middle reaches of the Yangtze River.
Hydrodynamic characteristics of spawning grounds are important factors affecting the spawning of four major Chinese carps (Mylopharyngodon piceus, Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Aristichthys nobilis). To investigate the relationship between the preferred hydrodynamic characteristics of spawning sites and the response of fish spawning behavior, we monitored the flow field of spawning sites during ecological operation of the Three Gorges Dam (i.e., man-made flood regulation) in 2014 and 2015. We used the data to explore the correlation between vorticity changes in spawning grounds and the spawning amount. Pearson correlation coefficients of the average vorticity in all cross-sections of the Yidu spawning ground and spawning amount in 2014 and 2015 were 0.730 and 0.822, respectively, indicating a significant positive correlation between vorticity and spawning activity. In some specific regions, this correlation was even stronger (Pearson correlations of the regional vorticity and egg production were >0.95). To further corroborate and analyze the relationship between these specific regions and the distribution of broodstock during the breeding season, an ultrasonic telemetry test of broodstock was conducted in the Yidu spawning ground in 2016. The results showed that the broodstocks were concentrated in the reach near the Quantong Pier (~76 km from the Three Gorges Dam). These regions were consistent with areas of river characterized by highly correlated vorticity and egg production levels, suggesting that these regions are areas preferred by four major Chinese carps for spawning.
A multi-mesh trammel net has been developed and used for sampling freshwater fishes. However, little is known about the catch efficiency of the net. This research investigated the catch efficiency of a multi-mesh trammel net (nominal mesh size; 10.0, 30.0, 50.0, and 70.0 mm) for fish sampling in the Yangtze River of China. Catch composition and factors affecting catch per unit effort based on fish number (CPUEN), weight (CPUEW), and species number (CPUES) were analyzed. The results showed that the net was capable of capturing a wide range of fish sizes (total length, 5.5 to 121.0 cm) and species (n = 50). Increasing soak time from 9.4 to 24.0 h resulted in a decrease in CPUEN and CPUEW while a longer soak time increased CPUES. CPUEN, CPUEW, and CPUES varied significantly with fishing locations. The net provides a potential complement to the current fish sampling techniques used in freshwater ecosystems (e.g., large rivers, lakes, and reservoirs). The findings of this research help to improve our understanding of the catch efficiency of the multi-mesh trammel net and provides insight into better designs for gears and methods for sampling diverse fish sizes and species.
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