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Body Size Descriptions of a Trophy-Class Shovelnose Sturgeon (Scaphirhynchus platorynchus) Population in a Large Unexploited River System 大型未开发水系中奖杯级铲鼻鲟(Scaphirhynchus platorynchus)种群体型描述
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-06-10 DOI: 10.1155/jai/3770658
Stefan R. Tucker, Jason A. DeBoer, Brandon S. Harris, Levi Solomon, Andrya L. Whitten Harris, Rob Hilsabeck, Dave Glover, James T. Lamer

Sturgeon species (Acipenseridae) around the world have undergone substantial population declines over the past century due to a suite of anthropogenic actions and overharvest. Shovelnose sturgeon are the smallest and most abundant sturgeon species in North America and still support commercial and recreational fisheries despite notable declines in abundance and population structure throughout much of their range. The Rock River, located in Northwestern Illinois, USA, has recently attracted angler attention in response to numerous state record shovelnose sturgeon captured via recreational angling (unregulated recreational fishery), thus prompting the need to understand the size structure and demographics of this largely undescribed population to inform management actions. This study was the first to describe relative condition and size distributions of shovelnose sturgeon in the Rock River, Illinois. A total of 1324 unique shovelnose sturgeon were captured between Fall of 2022 and Winter 2024-2025, with 22% of captured fish meeting or exceeding trophy size class requirements (≥ 810 mm). Shovelnose sturgeon in the Rock River can reach larger body sizes (length and weight) than other regional systems. The Rock River supports the highest proportion of trophy class shovelnose sturgeon in the world. Although no commercial exploitation occurs, recreational angling is currently unregulated, and this population may be vulnerable to substantial shifts in population structure that may warrant management action. Future research seeks to gain a better understanding of population dynamics and develop robust long-term monitoring protocols to inform data-driven management.

在过去的一个世纪里,由于一系列人为活动和过度捕捞,世界各地的鲟鱼物种(鲟科)数量大幅下降。铲鼻鲟是北美体型最小、数量最多的鲟鱼,尽管其分布范围内的丰度和种群结构显著下降,但仍为商业和休闲渔业提供支持。位于美国伊利诺斯州西北部的洛克河最近引起了垂钓者的注意,因为许多州记录了通过休闲垂钓捕获的铲鼻鲟(不受管制的休闲渔业),因此促使人们需要了解这种基本上未被描述的种群的大小结构和人口统计数据,以便为管理行动提供信息。这项研究首次描述了伊利诺伊州洛克河铲鼻鲟的相对状况和大小分布。在2022年秋季至2024-2025年冬季期间,共捕获了1324条独特的铲鼻鲟,其中22%的捕获鱼达到或超过了奖杯尺寸等级要求(≥810毫米)。岩石河中的铲鼻鲟可以达到比其他地区系统更大的体型(长度和重量)。岩石河是世界上最高比例的奖杯级铲鼻鲟的栖息地。虽然没有商业开发,但休闲垂钓目前是不受管制的,而且这种人口可能容易受到人口结构的重大变化的影响,这可能需要采取管理行动。未来的研究旨在更好地了解种群动态,并制定强有力的长期监测方案,为数据驱动的管理提供信息。
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引用次数: 0
Stocking and Harvesting Patterns Influence Age Structure, Growth, and Body Condition of Bighead Carp Populations From Two Large Subtropical Reservoirs 放养和捕捞方式对两个大型亚热带水库鳙鱼种群年龄结构、生长和体况的影响
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-06-05 DOI: 10.1155/jai/9632464
Xuemei Chen, Lei Yang, Hang Zhang, Xiang Ji, Chuansong Liao, Thomas Mehner, Chuanbo Guo, Tanglin Zhang, Jiashou Liu

Understanding the density-dependent effects is essential for sustainable fishery management. Stocking and harvesting activities directly influence fish abundance and associated density-dependent responses. In this study, we compared the body size, age structure, growth patterns, and body condition of bighead carp (Hypophthalmichthys nobilis) from two large subtropical reservoirs in China: Shanmei Reservoir (SMR) (n = 161) and Liuxihe Reservoir (LXHR) (n = 257), which have different stocking and harvesting patterns. In SMR, annual stocking and harvesting maintain a lower bighead carp biomass (catch per unit effort, 0.62 ± 0.03 g/m2/24 h), whereas in LXHR, annual stocking without harvesting results in higher fish biomass (0.84 ± 0.01 g/m2/24 h). Plankton biomass and abundance, particularly zooplankton, were significantly higher in SMR than in LXHR. The SMR population exhibited a more stable age structure, faster growth, and better body condition, whereas the LXHR population showed the opposite trends under higher fish density. Both populations exhibited isometric growth and included individuals aged one to five, but dominant age groups differed. The SMR population had a larger inflection age and greater standard length (SMR: 4.7 years and 591 mm; LXHR: 3.5 years and 456 mm). In addition, total mortality, fishing mortality, and exploitation rates were higher in SMR than in LXHR. These findings highlighted the role of stocking and harvesting in shaping fish density and hence inducing density-dependent effects. A balanced fisheries strategy integrating both practices is crucial for sustainable fish population management.

了解密度依赖效应对可持续渔业管理至关重要。放养和捕捞活动直接影响鱼类丰度和相关的密度依赖性反应。本研究比较了中国两个具有不同放养和捕捞模式的大型亚热带水库:山美水库(n = 161)和柳溪河水库(n = 257)中鳙鱼的体型、年龄结构、生长模式和身体状况。在小湖区,每年放养和捕捞维持较低的鳙鱼生物量(单位努力渔获量为0.62±0.03 g/m2/24 h),而在低湖区,不捕捞的年放养维持较高的鳙鱼生物量(0.84±0.01 g/m2/24 h)。浮游生物的生物量和丰度,特别是浮游动物,在小水域显著高于大水域。在高鱼密度条件下,小种群表现出更稳定的年龄结构、更快的生长速度和更好的体况,而大种群表现出相反的趋势。这两个种群都表现出等长生长,包括1至5岁的个体,但优势年龄组不同。SMR人群有较大的拐点年龄和较大的标准体长(SMR: 4.7岁和591 mm;LXHR: 3.5岁,456毫米)。此外,小生境的总死亡率、捕捞死亡率和捕捞率均高于大生境。这些发现强调了放养和捕捞在形成鱼类密度方面的作用,从而引起了密度依赖效应。综合这两种做法的平衡渔业战略对可持续鱼类种群管理至关重要。
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引用次数: 0
Nutritional Retention in Frozen Tubifex (Tubifex tubifex) Stored at −20°C: A Comparative Analysis of Storage Durations up to 12 Weeks 在- 20°C保存的冷冻输卵管(Tubifex Tubifex)中的营养保留:长达12周的保存时间的比较分析
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-05-29 DOI: 10.1155/jai/7675721
Guntapalli Sravani, Paramita Banerjee Sawant, Sukham Munilkumar, Gouranga Biswas, Shamna N., Subam Debroy, Vikas Kumar Ujjania, Debajit Sarma, Kurapati Nagendrasai, Kamil Akamad D., Neerudu Harika

The utilization of live Tubifex (Tubifex tubifex) as a feed source in ornamental fish aquaculture is widely recognized for its high nutritional value. However, feeding live tubifex worms come with a higher risk of transmitting parasites, and precautions must be taken. So, necessitate feeding strategies have to be adopted which includes dietary diversification such as usage of tubifex in frozen form. This study aimed to evaluate the nutritional stability of frozen Tubifex over a 12-week period (85 days), stored at −20°C. Weekly evaluations were conducted to measure changes in key nutritional parameters, including crude protein, moisture, lipid, and ash content. The results indicated that crude protein content remained stable (p > 0.05) for the first 5 weeks, while lipid content showed no significant changes (p > 0.05) until the seventh week. Additionally, ash content was stable (p > 0.05) until the ninth week of storage. These findings suggest that frozen Tubifex can be safely stored for up to 36 days without significant nutritional degradation, offering a viable alternative to live feed in ornamental fish aquaculture this research supports the use of frozen Tubifex by mitigating the risks associated with live feed while ensuring optimal nutritional delivery to aquatic organisms.

利用活管甲(Tubifex Tubifex)作为观赏鱼类养殖的饲料来源,其高营养价值已得到广泛认可。然而,喂养活的管虫会带来更高的传播寄生虫的风险,必须采取预防措施。因此,必须采取必要的喂养策略,其中包括饮食多样化,如使用冷冻形式的输卵管。本研究旨在评估冷冻Tubifex在- 20℃下保存12周(85天)的营养稳定性。每周进行评估,以测量关键营养参数的变化,包括粗蛋白质、水分、脂肪和灰分含量。结果表明,粗蛋白质含量保持稳定(p >;0.05),而脂肪含量无显著变化(p >;0.05)至第七周。此外,灰分含量稳定(p >;0.05),保存至第9周。这些研究结果表明,冷冻Tubifex可以安全储存长达36天而不会出现明显的营养降解,为观赏鱼养殖提供了一种可行的活饲料替代品。这项研究支持使用冷冻Tubifex,通过降低与活饲料相关的风险,同时确保向水生生物提供最佳的营养。
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引用次数: 0
Length–Weight and Length–Length Relationships of Six Fish Species From the Middle Section of the Yangtze River Basin, China
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-05-14 DOI: 10.1155/jai/7549347
Chaoyang Wan, Fang Dong, Xiao Xie, Zhiyu Cai, Myonghee Kang, Hui Zhang

This study estimated the length–weight relationships (LWRs) and length–length relationships (LLRs) for 6 fish species in the middle Yangtze River basin and its adjacent lakes (Ochetobius elongatus (Kner 1867), Rhinogobio cylindricus (Günther 1888), Hemibagrus macropterus (Bleeker 1870), Pseudobagrus albomarginatus (Rendahl 1928), Siniperca knerii (Garman 1912), and Coreosiniperca roulei (Wu 1930)). All fish specimens were seasonally collected through scientific research monitoring of fishery resources from May 2020 to June 2023. A triple gillnet (with a mesh size of 20–30 mm, a height of 2.0–4.0 m, and a length of 30–50 m) was employed for the capture. The LWRs and LLRs of all specimens were highly significant (p < 0.05), featuring high correlation coefficients (r2 ≥ 0.9511). These findings not only enriched the data in FishBase but also offered supplementary references for the management of the Yangtze River during its fishing ban period.

本文对长江中游流域及其邻近湖泊6种鱼类(Ochetobius elongatus (Kner 1867)、Rhinogobio icus (g nther 1888)、Hemibagrus macropterus (Bleeker 1870)、Pseudobagrus albomarginatus (Rendahl 1928)、sininiperca knerii (Garman 1912)和Coreosiniperca roulei (Wu 1930))的长度-重量关系(LWRs)和长度-长度关系(LLRs)进行了估算。所有鱼类标本于2020年5月至2023年6月通过渔业资源科研监测进行季节性采集。采用三层刺网(网目尺寸为20-30毫米,高度为2.0-4.0米,长度为30-50米)进行捕获。所有标本的lwr和llr均极显著(p <;0.05),相关系数高(r2≥0.9511)。这些发现不仅丰富了FishBase的数据,也为长江禁渔期的管理提供了补充参考。
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引用次数: 0
Size Frequency, Length–Weight Relationships, and Condition Factors of the Four Introduced Fish Species in Geray Reservoir, Northwest Ethiopia 埃塞俄比亚西北部Geray水库4种引进鱼类的大小、频率、长重关系及条件因素
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-05-06 DOI: 10.1155/jai/4670161
Minwyelet Mingist, Yinager Yilak

Studying size frequency, size relationships, and the conditions of fish is vital for managing the resources properly. Some biological aspects of the fishes in Geray Reservoir were studied from October 2017 to August 2018. Fish were sampled monthly by overnight setting of gillnets. Fishers’ catch was also used. Fish were dissected and sexed. Biological parameters were measured following standard procedures. Four fish species (Oreochromis niloticus, Tilapia rendalli, Carassius auratus, and Cyprinus carpio) belonging to the Cichlidae and Cyprinidae families were identified. From the total 570 fish specimens collected, 426 (74.7%), 66 (11.6%), 44 (7.7%), and 34 (6.0%) were O. niloticus, T. rendalli, C. auratus, and C. carpio, respectively. In Geray Reservoir, most of the sampled fish specimens were found in length intervals of 24–27, 18–24, 24–32, and 41–49 cm for O. niloticus, T. rendalli, C. auratus, and C. carpio, respectively. Length–weight relationships of O. niloticus, T. rendalli, C. auratus, and C. carpio were curvilinear and statistically significant (p < 0.05). For all introduced fish species, b values were less than 3, negative allometry growth. The mean Fulton condition factor of O. niloticus, T. rendalli, C. auratus, and C. carpio was > 1 and showed significant variation (p > 0.05) among months. In Geray Reservoir, all four economically important fish species are fully established and contribute significantly to local livelihoods. However, in this sampling scheme, the number of catches of T. rendalli, C. auratus, and C. carpio deserve due attention for the management of the exotic fish species. The data presented in this work could be vital for further biological investigations, helping researchers to assess the status of the introduced fishes in the reservoir and for local fish managers to select appropriate management strategies.

研究鱼的大小频率、大小关系和鱼的状况对合理管理资源至关重要。2017年10月至2018年8月对Geray水库鱼类的一些生物学方面进行了研究。每月用刺网过夜取样。渔民的捕获物也被使用。鱼被解剖并进行了性别鉴定。按照标准程序测量生物学参数。鉴定出鲤科和鲤科的4种鱼类,分别为尼罗鱼(Oreochromis niloticus)、罗非鱼(Tilapia rendalli)、鲫(Carassius auratus)和鲤(Cyprinus carpio)。在共采集的570份鱼类标本中,niloticus 426份(74.7%),T. rendalli 66份(11.6%),C. auratus 44份(7.7%),C. carpio 34份(6.0%)。在Geray水库,O. niloticus、T. rendalli、C. auratus和C. carpio的标本长度分别为24 ~ 27、18 ~ 24、24 ~ 32和41 ~ 49 cm。niloticus、T. rendalli、C. auratus和C. carpio的长权关系呈曲线关系,具有统计学意义(p < 0.05)。所有引进鱼种b值均小于3,呈负异速生长。niloticus、T. rendalli、C. auratus和C. carpio的平均Fulton条件因子为>;月间差异有统计学意义(p > 0.05)。在Geray水库,所有四种经济上重要的鱼类都得到了充分的培育,并对当地的生计作出了重大贡献。然而,在该采样方案中,对外来鱼种的管理应注意黄颡鱼(T. rendalli)、金颡鱼(C. auratus)和鲤鱼(C. carpio)的渔获量。这项工作中提供的数据对进一步的生物学调查至关重要,可以帮助研究人员评估水库中引进鱼类的状况,并为当地鱼类管理者选择适当的管理策略。
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引用次数: 0
Length–Mass and Length–Weight Relationships of Japanese Freshwater Fishes 日本淡水鱼的长度-质量和长度-重量关系
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-05-06 DOI: 10.1155/jai/6613003
Hikaru Nakagawa, Yuki Matsuzawa, Seiya Okamoto, Akira Nagayama, Yuki Mukai, Terutaka Mori

Relationships between weights (W, dry weight [DW] and wet weight [WW] and lengths L, standard length [SL], head length [HL], and caudal peduncle depth [CD]) and these between DW and WW were examined in 61 freshwater fishes using formula W = aLb and DW = aWWb, respectively. The parameters of the SL–DW, SL–WW, HL–DW, HL–WW, CD–DW, CD–WW, and WW–DW relationships were determined for 60, 61, 57, 58, 50, 50, and 61 taxa, respectively, with the criterion where the estimated R-square was greater than 0.8. For the genus or higher taxonomic level, parameters of the SL–DW and SL–WW relationships were determined for 20 taxonomic groups with the same criterion to each species. For the three eel-like species, the SL–DW and SL–WW relationships were largely consistent with the pooled taxonomic data. In contrast, noneel-like species exhibited variations in these relationships across species. Systematic variations in the SL–DW and SL–WW relationships were observed at the order and family levels, except in Salmonidae, Cobitidae, and Cottidae. However, at the genus level, these relationships were generally consistent among species. These intragroup variations should be considered when applying these equations to ecological and taxonomic studies.

用公式W = aLb和DW = aWWb分别测定了61种淡水鱼类的体重(W、干重[DW]和湿重[WW]与长度L、标准长度[SL]、头长[HL]和尾柄深度[CD])与DW和WW之间的关系。分别确定了60、61、57、58、50、50和61个分类群的SL-DW、SL-WW、HL-DW、HL-WW、CD-DW、CD-WW和w - dw关系参数,估计r平方值大于0.8。在属及以上的分类水平上,对20个分类类群的SL-DW和SL-WW关系参数进行了测定,对每个物种采用相同的标准。对于3个类鳗鱼物种,SL-DW和SL-WW关系与汇总的分类数据基本一致。相比之下,非鳗鱼类物种在这些关系上表现出了跨物种的差异。SL-DW和SL-WW关系在各目和科水平上均存在系统差异,但在鲑科、舞螨科和舞螨科中存在差异。然而,在属水平上,这些关系在种之间基本一致。在将这些方程应用于生态学和分类学研究时,应考虑到这些群内变异。
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引用次数: 0
Diversity and Some Biological Aspects of Fishes From a River in the National Park of Ethiopia 埃塞俄比亚国家公园河流鱼类的多样性和一些生物学方面
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-04-29 DOI: 10.1155/jai/3762316
Assefa Tessema Tecklie, Wondoson Mekonen Workneh

The Denkoro River is the largest river in Borena Sayint National Park (BSNP) of Ethiopia. Many studies have been conducted on the terrestrial biodiversity of the park. However, there are no baseline data on the fish biodiversity of the park. Therefore, this study aimed to assess the diversity, determine the biology of the dominant fishes, and compile baseline data. Fish specimens were collected using gillnets (4, 6, 8, 10, and 12 cm stretched mesh sizes), monofilaments (5, 10, 15, and 20 mm mesh size), and hook and lines. Fish samples in the Denkoro River were collected in wet (September) and dry (December) seasons, 2022. A total of 398 fish specimens were collected from three sites in both seasons. Five fish species, Labeobarbus intermedius, Garra dembecha, Clarias gariepinus, Labeobarbus beso, and Oreochromis niloticus, were identified from the river. The diversities (H′) of fish species in the Wachau, Buke, and Kernemariam sites in the dry season were 1.45, 0.95, and 0.64, respectively. During the wet season, fish species diversity was lower than that in the dry season, with Shannon diversity indices of 1.33, 1.18, and 0.93 at the Wachau, Buke, and Kernemariam sites, respectively. L. intermedius was the most abundant species, with 42.9% of the total catch. The length–weight relationships of L. intermedius and L. beso followed a curvilinear pattern, described by the equations TW = 0.005TL3.12 and TW = 0.01TL2.94, respectively. In all sites, females were more numerous than males and statistically significant (Chi-square, p < 0.05). For sustainable fish conservation and development, further research on fishing activities, feeding habits, and fish biology is needed. Important management measures such as regulated fishing activities, habitat restoration, and spawning ground protection should be performed in the area.

Denkoro河是埃塞俄比亚Borena Sayint国家公园(BSNP)最大的河流。对该公园的陆地生物多样性进行了许多研究。然而,没有关于公园鱼类生物多样性的基线数据。因此,本研究旨在评估多样性,确定优势鱼类的生物学特征,并编制基线数据。使用刺网(4、6、8、10和12厘米拉伸网目尺寸)、单丝(5、10、15和20毫米网目尺寸)以及鱼钩和鱼线收集鱼类标本。Denkoro河的鱼类样本于2022年湿季(9月)和干季(12月)采集。两个季节在三个地点共采集了398份鱼类标本。共鉴定出5种鱼类,分别为中间Labeobarbus intermedius、Garra dembecha、Clarias gariepinus、Labeobarbus beso和Oreochromis niloticus。干季Wachau、Buke和Kernemariam样地鱼类多样性(H′)分别为1.45、0.95和0.64。丰水期Wachau、Buke和Kernemariam样地的Shannon多样性指数分别为1.33、1.18和0.93,低于枯水期。中间乳杆菌种类最多,占总渔获量的42.9%。中间L.和贝索L.的长度-权重关系分别为TW = 0.005TL3.12和TW = 0.01TL2.94的曲线型。在所有站点中,女性数量均多于男性,且具有统计学意义(χ 2, p < 0.05)。为了鱼类的可持续保护和发展,需要进一步研究渔业活动、摄食习性和鱼类生物学。在该地区应采取重要的管理措施,如规范捕捞活动、栖息地恢复和产卵地保护。
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引用次数: 0
Skeletal Deformities in Farmed Rainbow Trout, Oncorhynchus mykiss, at an Early Stage of Development: A Case Study of Indian Himalayan States 养殖虹鳟鱼(Oncorhynchus mykiss)在早期发育阶段的骨骼畸形:印度喜马拉雅州的个案研究
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-04-24 DOI: 10.1155/jai/1923763
Ritesh Shantilal Tandel, Pragyan Dash, Raja Aadil Hussain Bhat, Kavya Kalingapuram, Prakash Sharma

The rainbow trout, Oncorhynchus mykiss, is the most extensively cultured coldwater fish species in India. However, skeletal deformities remain a significant concern and are frequently reported in rainbow trout farming operations. The incidence of skeletal deformities can serve as an indicator of the quality of rearing conditions and environmental factors. The present study was conducted to assess the skeletal deformities of rainbow trout, from selected farms in Himachal Pradesh, and Uttarakhand, India. During the study, physicochemical parameters such as water temperature, pH, dissolved oxygen (DO), nitrogen and phosphorus compounds, and chlorides were recorded. The brain, gill, and muscle tissues were examined under optical microscope to inspect myxozoan parasite infections. Nevertheless, myxozoan parasites were not detected in the microscopic examination. For histopathological analysis, tissue samples from the internal organs were processed. The degree of acinar cell necrosis, fibrosis, and macrophage aggregation were determined through histopathological examination. The skeletal deformities, whirling behavior, and mortality were directly associated with the major pancreatic anomalies but no signs of parasite presence.

虹鳟(Oncorhynchus mykiss)是印度最广泛养殖的冷水鱼类。然而,骨骼畸形仍然是一个值得关注的问题,经常在虹鳟鱼养殖作业中报道。骨骼畸形的发生率可以作为饲养条件质量和环境因素的一个指标。目前的研究是为了评估虹鳟鱼的骨骼畸形,从喜马偕尔邦和北阿坎德邦选定的农场,印度。在研究过程中,记录了水温、pH、溶解氧(DO)、氮磷化合物和氯化物等理化参数。在光学显微镜下检查脑、鳃和肌肉组织,以检查粘虫寄生虫感染。显微镜检查未检出黏液寄生虫。为了进行组织病理学分析,对内脏组织样本进行了处理。通过组织病理学检查观察腺泡细胞坏死、纤维化、巨噬细胞聚集程度。骨骼畸形,旋转行为和死亡率与主要胰腺异常直接相关,但没有寄生虫存在的迹象。
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引用次数: 0
Polymorphism in the Growth Hormone Gene and Its Association With Growth-Related Traits in Common Carp, Cyprinus carpio (Linnaeus, 1778), in the Inland Saline Production System 内陆盐碱化生产系统中鲤生长激素基因多态性及其与生长相关性状的关系
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-04-23 DOI: 10.1155/jai/8839234
Anjali Kumari, Mujahidkhan A. Pathan, Raghul R., Nagaraja P. S., Susitharan V., Priyanka Sanwal, Angom Lenin Singh

Identification of polymorphism in growth-related genes and their association with growth traits is an area of intense research. The growth rate is the most sought-after economic trait in the breeding program of fish. The significant association of polymorphism will aid in marker-assisted selection and speed up the genetic improvement program. The present study was performed in a population of common carp belonging to an ongoing selective breeding program at ICAR-CIFE, Rohtak Center. A total of 50 common carp based on the breeding value for body weight were selected and bifurcated into two groups: high and low performers. Each fish had three records (based on pond age) for growth-related traits, viz., body weight (Bw), body length (Bl), and body height (Bh). At 200 days of pond age, the mean Bw, Bl, and Bh for high performers was 494.28 ± 52.12 g, 23.764 ± 0.63 cm, and 9.36 ± 0.35 cm, respectively, whereas the mean Bw, Bl, and Bh for low performers was found to be 165.72 ± 17.31 g, 16.20 ± 0.57 cm, and 6.40 ± 0.23 cm, respectively. The DNA was extracted from the fin clips of these fish. Five primers were used to amplify five distinct regions of the growth hormone gene covering five exons and four introns. The positive PCR products were purified and subjected to Sanger sequencing. The sequences with a Phred quality score above 20 were imported in Sequencher V for SNP hunting. Five polymorphic sites were detected, viz., C165 (amplicon 3), D60 (amplicon 4), D114 (amplicon 4), E90 (amplicon 5), and E185 loci (amplicon 5). The population genetic analysis was performed using GenAlex V. The D60 and E185 loci significantly deviated from the Hardy–Weinberg equilibrium (p < 0.05). Growth association was performed for the polymorphic loci using a linear model by invoking PROC GLM in SAS. The loci C165, D60, and E90 were significantly associated with the Bw, Bl, and Bh. The results obtained in this study must be utilized in the ongoing selective breeding of common carp to speed up genetic improvement.

鉴定生长相关基因的多态性及其与生长性状的关联是一个需要深入研究的领域。在鱼类育种计划中,生长率是最受欢迎的经济性状。多态性的重要关联将有助于标记辅助选择,加快遗传改良计划。本研究是在罗塔克中心(ICAR-CIFE)一个正在进行的选择性育种项目中的鲤鱼群体中进行的。根据体重的育种值,共选取了 50 条鲤鱼,并将其分为两组:表现优异组和表现不佳组。每条鱼都有三项与生长相关的性状记录(基于池塘龄),即体重(Bw)、体长(Bl)和体高(Bh)。在 200 日龄时,表现好的鱼的平均体重、体长和体高分别为 494.28 ± 52.12 克、23.764 ± 0.63 厘米和 9.36 ± 0.35 厘米,而表现差的鱼的平均体重、体长和体高分别为 165.72 ± 17.31 克、16.20 ± 0.57 厘米和 6.40 ± 0.23 厘米。从这些鱼的鳍片中提取 DNA。使用五种引物扩增生长激素基因的五个不同区域,包括五个外显子和四个内含子。阳性 PCR 产物经纯化后进行桑格测序。Phred 质量得分超过 20 分的序列被导入 Sequencher V 进行 SNP 搜索。检测到五个多态位点,即 C165(扩增片段 3)、D60(扩增片段 4)、D114(扩增片段 4)、E90(扩增片段 5)和 E185 位点(扩增片段 5)。D60 和 E185 位点明显偏离 Hardy-Weinberg 平衡(p < 0.05)。通过调用 SAS 中的 PROC GLM,使用线性模型对多态位点进行了生长关联分析。位点 C165、D60 和 E90 与 Bw、Bl 和 Bh 显著相关。本研究获得的结果必须用于正在进行的鲤鱼选育,以加快遗传改良。
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引用次数: 0
Study on the Life History and Critical Habitat Identification of Coilia nasus From the Yellow River Based on Microchemical Characteristics of Otolith 基于耳石微化学特征的黄河鼻蝽生活史及临界生境鉴定研究
IF 0.7 4区 农林科学 Q4 FISHERIES Pub Date : 2025-04-15 DOI: 10.1155/jai/9767746
Xuri Cong, Guancang Dong, Junpeng Wang, Xiuqi Li, Yang Li, Yanan Wang, Chunmei Leng, Yunfang Gao, Xiuli Chen, Lufeng Sun, Qingqing Wang, Zhaoming Gao, Yiping Ren, Tao Jiang

To reconstruct the life history of Coilia nasus in the Shandong section of the Yellow River, an electron probe microanalyzer (EPMA) was employed to analyze the Sr and Ca values in the otoliths of 12 individuals collected from Pangkou Bay. The results indicated that the life history of C. nasus is complex and diverse, the individuals in this study can be categorized into five distinct patterns. Pattern I includes P1, P2, P3, and P4, whose life history tracks indicate hatching in brackish water near the Yellow River estuary; after approximately 1 year, they begin to migrate along the Yellow River to Pangkou Bay for spawning. Pattern II encompasses P9, P12, and P13, which hatch in freshwater habitats; as these individuals grow, there is an abrupt change from Stage 1 to Stage 2, but their life history does not extend to marine habitats with high Sr/Ca values, and after about 1 year, they migrate along the Yellow River to Pangkou Bay for spawning. Pattern III includes P6, P8 and P10, which also hatch in freshwater habitats and experience abrupt changes; however, the mapping analysis reveals a large area of red and yellow concentric rings, indicating a history of seawater habitat and an extension of their life history to Laizhou Bay. Pattern IV is represented by P11, whose living environment was relatively stable, with no significant abrupt changes and no migratory life history characteristic, which presumed to be a freshwater settlement type that passively entered the Yellow River due to the flood season of Dongping Lake. Pattern V is exemplified by P7, whose analysis results show two trips to freshwater and brackish water habitats, both of which produced significant pattern changes which indicates that it conducted a reproductive migration at the first instar, swam to the Yellow River estuary after spawning, and migrated to Pangkou during the reproductive period of the following year to lay eggs until it was captured. This study demonstrates that most individuals in Pangkou Bay are of the migratory type. Compared with the sexual maturity of individuals in other waters of the Yangtze River basin, Pangkou Bay is identified as an important spawning ground for the migratory type of C. nasus.

为了重建黄河山东段鼻蝽的生活史,采用电子探针微量分析仪(EPMA)分析了在盘口湾采集的12只尾蝽耳石中的Sr和Ca值。结果表明,鼻窦草的生活史是复杂而多样的,本研究的个体可分为五种不同的模式。模式1包括P1、P2、P3和P4,其生活史轨迹表明在黄河口附近的微咸水中孵化;大约1年后,它们开始沿黄河迁徙到庞口湾产卵。模式II包括P9、P12和P13,它们在淡水生境中孵化;随着个体的成长,从第1阶段到第2阶段发生突变,但其生活史没有延伸到Sr/Ca值较高的海洋生境,大约1年后,沿黄河迁徙到Pangkou湾产卵。模式III包括P6、P8和P10,也在淡水生境中孵化,经历突变;然而,地图分析显示了大面积的红色和黄色同心圆环,表明它们的海水栖息地历史及其生活史延伸到莱州湾。模式四以P11为代表,其生存环境相对稳定,没有明显的突变,没有迁徙生活史特征,推测为受东平湖汛期影响被动进入黄河的淡水聚落类型。模式V以P7为例,分析结果显示其两次往返淡水和咸淡水栖息地,两次都产生了明显的模式变化,表明其在第一龄进行了生殖迁徙,产卵后游到黄河口,第二年繁殖期间迁徙到邦口产卵,直到被捕获。本研究表明,庞口湾的大部分个体为洄游型。与长江流域其他水域个体的性成熟情况相比,Pangkou湾被确定为迁徙型鼻唇鱼的重要产卵场。
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引用次数: 0
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Journal of Applied Ichthyology
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