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Use of ovaprim and Chorulon hormones for spawning induction of G4 transgenic Mutiara catfish Brood stock in rearing indoor Hatchery ovaprim和Chorulon激素在室内孵化场诱导G4转基因Mutiara鲶鱼幼鱼产卵的应用
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4c.2837
I. D. Buwono, L. P. Dewanti, R. Herman, Anisa Tri Mariane
This research was conducted at Hatchery Building 4, the Fisheries Biotechnology and Marine Sciences Laboratory of Padjadjaran University from October to November 2022, aims to obtain the optimal combination dosage of ovaprim and HCG hormones on the reproductive performance of mutiara catfish. The study used a completely randomized design (CRD) with four treatments (pair A: 0.4 ml ovaprim + 0.6 ml HCG, B: 0.5 ml ovaprim + 0.5 ml HCG, C: 0.6 ml ovaprim + 0.4 ml HCG for transgenic fish pairs, and D: 0.4 ml ovaprim + 0.6 ml HCG for non-transgenic fish pairs) with three pairs of broodstock as replicates. The research results showed that the best dosage to induce spawning in transgenic G4 mutiara catfish was found in treatment B (0.5 ml ovaprim/kg female and male broodstock weight and 0.5 ml HCG/kg male broodstock weight). After spawning, the broodstock pairs in treatment B showed the best results with an average relative fecundity of 85,103 eggs/kg broodstock, fertilization rate (FR) reaching 88.150%, hatching rate (HR) reaching 90.056%, and survival rate (SR) reaching 88.034%.
本研究于2022年10 - 11月在Padjadjaran大学渔业生物技术与海洋科学实验室4号孵化场进行,旨在获得ovaprim和HCG激素的最佳组合剂量对多角鲶鱼繁殖性能的影响。本研究采用完全随机设计(CRD), 4个处理(a对:0.4 ml ovaprim + 0.6 ml HCG, B对:0.5 ml ovaprim + 0.5 ml HCG, C对:0.6 ml ovaprim + 0.4 ml HCG,转基因鱼对,D对:0.4 ml ovaprim + 0.6 ml HCG), 3对鱼作为重复。研究结果表明,诱导转基因G4多斑鲶鱼产卵的最佳剂量为处理B (0.5 ml ovaprim/kg雌、雄鱼体重和0.5 ml HCG/kg雄鱼体重)。产卵后,B处理的平均相对产卵量为85,103个/kg,受精率(FR)达到88.150%,孵化率(HR)达到90.056%,成活率(SR)达到88.034%。
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引用次数: 0
Exploring the intricate relationship between food availability and feeding behavior in fish larvae: A review 探讨鱼类幼虫食物可得性与摄食行为之间的复杂关系
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4a.2816
F. Pratiwy, R. .
The behavior of fish larvae is related to finding food, avoiding predators, maintaining body temperature and seeking shelter. Fish larvae behavior is an action or activity carried out by fish larvae to fulfill their life needs. Several factors such as population density, level of food availability, air temperature, air quality, and lighting can affect the behavior of fish larvae. The nutritional needs of larvae are higher than adult fish, because nutrients are needed not only for activity and maintenance, but also for growth. The behavior characteristics of fish larvae towards various types of feed can vary depending on the fish species, developmental stage, and the type and quality of the feed given. The purpose of this article is to understand how the level of food availability has an impact on the destruction of life and growth of fish larvae. This preparation uses a literature review with a narrative literature review method. The results of this article can be seen in the importance of food availability in the life cycle of fish, especially in the early stages of the larvae.
鱼类幼虫的行为与寻找食物、躲避捕食者、保持体温和寻找庇护所有关。鱼苗行为是鱼苗为满足其生活需要而进行的一种行为或活动。种群密度、食物供应水平、气温、空气质量和光照等几个因素都会影响鱼类幼虫的行为。幼鱼的营养需求高于成鱼,因为幼鱼不仅需要活动和维持,而且需要生长所需的营养。鱼类幼虫对不同类型饲料的行为特征会因鱼种、发育阶段以及所喂饲料的类型和质量而异。本文的目的是了解食物供应水平如何对鱼类幼虫的生命和生长的破坏产生影响。本论文采用文献综述与叙事文献综述相结合的方法。这篇文章的结果可以看出食物供应在鱼的生命周期中的重要性,特别是在幼虫的早期阶段。
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引用次数: 0
Towards feed independence: Types of auto-feeder technologies for efficient fish farming 迈向饲料独立:高效养鱼的自动喂料技术类型
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4a.2819
F. Pratiwy, K. Haetami
Efficient feeding plays a vital role in the success of fish farming operations. In recent years, there has been a growing need to develop auto-feeder technologies that not only optimize feed utilization but also reduce labor costs and environmental impact. This abstract explores the various types of auto-feeder technologies that contribute to achieving feed independence in fish farming. The paper delves into three primary categories of auto-feeders: demand-based feeders, time-based feeders, and sensor-based feeders. Demand-based feeders employ advanced algorithms to dispense feed based on the fish's appetite, ensuring optimal feeding rates and minimizing wastage. Time-based feeders provide feed at pre-determined intervals, offering a more straightforward approach but requiring careful calibration. Sensor-based feeders utilize real-time data from environmental sensors, such as water quality parameters and fish behavior, to adjust feeding schedules and quantities accordingly. The abstract highlights the advantages and limitations of each auto-feeder type, considering factors such as feed conversion efficiency, growth performance
有效的饲养对养鱼作业的成功起着至关重要的作用。近年来,人们越来越需要开发自动喂料技术,不仅要优化饲料利用率,还要降低劳动力成本和环境影响。本摘要探讨了各种类型的自动喂食技术,有助于实现饲料独立在鱼类养殖。本文深入研究了自动馈线的三个主要类别:基于需求的馈线,基于时间的馈线和基于传感器的馈线。基于需求的喂食器采用先进的算法根据鱼的食欲分配饲料,确保最佳的喂食率并最大限度地减少浪费。基于时间的给料器以预先确定的间隔提供给料,提供更直接的方法,但需要仔细校准。基于传感器的喂食器利用来自环境传感器的实时数据,如水质参数和鱼类行为,来相应地调整喂食时间表和数量。摘要综合考虑饲料转换效率、生长性能等因素,重点介绍了各种自动喂料机的优点和局限性
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引用次数: 0
Livelihood status of fishermen in Paba, Mohonpur and Durgapur at Rajshahi District of Bangladesh 孟加拉国拉杰沙希地区帕巴、莫翁布尔和杜尔加普尔渔民的生计状况
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4a.2820
M. Hosen, Md. Delwer Hossain, M. Harun-ur-Rashid, Md. Abu Sayed Jewel
The present research work was conducted to find out livelihood status of fishermen at Paba, Mohonpur and Durgapur in Rajshahi district of Bangladesh for a period of one year from July 2020 to June 2021. Data were collected from 600 fishermen (Paba, 200; Mohonpur, 200 and Durgapur, 200) through questionnaire interview and Focus Group Discussion (FGD). It was covered the main fishing communities in Rajshahi area. For data collection, three methods were used such as, personal interview, direct observations and use of PRA (Participatory Rural Appraisal) & FGD (focus groups discussion) tools regarding the fishermen information. Livelihood condition of fishermen were presented in terms of categories of fishermen, types of fishermen, age structure, educational status, family size, status of school going children, religion and marital status, housing condition, occupation, annual income, source of drinking water, sanitary conditions and credit access. It was found that 66-73% professional fishermen, 31-34% can signature, 49-57.50% small family (1-4), 87-92% Muslim and the rest were Hindus and others. Among the occupations of fishermen, only fishing was contributed 48-56.5%. The housing condition was Kacha 57.5-71% and annual income (<1) 1 lac (40.5-52.5%). Most of the fishermen used drinking water mainly Tube well (72.5-77.5%). Most of the fishermen depends on NGO for credit access. They face various problems such as low income, limited alternative income opportunities, inadequate credit system and lack of adequate medical services.
目前的研究工作是为了了解孟加拉国拉杰沙希地区帕巴、莫翁布尔和杜尔加普尔渔民的生计状况,为期一年,从2020年7月到2021年6月。从600名渔民收集数据(帕巴,200;Mohonpur, 2000和Durgapur, 2000)通过问卷访谈和焦点小组讨论(FGD)。它覆盖了Rajshahi地区的主要渔业社区。在数据收集方面,采用了个人访谈、直接观察和参与式农村评估(PRA)和焦点小组讨论(FGD)三种方法来收集渔民信息。渔民生计状况从渔民类别、渔民类型、年龄结构、教育程度、家庭规模、学龄子女状况、宗教和婚姻状况、住房条件、职业、年收入、饮用水来源、卫生条件和信贷获取情况等方面进行了介绍。研究发现,66-73%的专业渔民,31-34%的渔民会签名,49-57.50%的渔民是小家庭(1-4),87-92%的渔民是穆斯林,其余为印度教徒等。在渔民职业中,仅渔业占48-56.5%。居住条件为57.5-71%,年收入(<1)1 lac(40.5-52.5%)。饮用水以管井为主(72.5% ~ 77.5%);大多数渔民依靠非政府组织获得信贷。他们面临着收入低、替代收入机会有限、信贷制度不健全和缺乏适当医疗服务等各种问题。
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引用次数: 0
Copper toxicity in aquatic ecosystem: A Review 水生生态系统铜毒性研究进展
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4b.2835
Smriti ., A. Ahmed, Samiksha Lodhi, S. Shukla
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引用次数: 0
Evaluation of heavy metals accumulation in selected food fish Mystus cavasius from river Krishna, Andhra Pradesh 安得拉邦克里希纳河部分食用鱼中重金属积累的评价
Pub Date : 2023-07-01 DOI: 10.22271/fish.2023.v11.i4a.2825
S. K, Aradhya Sarma Bvl, D. K, D. P., Krishna Pv
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引用次数: 0
Microbiological evaluation of ready to eat product of Horina (Metapenaeus Monoceros) shrimp at a sea food industry of Bangladesh 孟加拉国一家海产品工业对Horina (Metapenaeus Monoceros)虾即食产品的微生物学评价
Pub Date : 2023-05-01 DOI: 10.22271/fish.2023.v11.i3a.2807
Jahanara Akhter Lipi, Umme Hani Runu, P. Majumdar, M. Hasan, M. Hossain
Microbiological quality assessment is a crucial part of sea food processing industries. The food processing companies must safeguard the quality and safety of their products for the consumers. The study was carried out to assess the microbial load (total bacterial load-total coliforms, fecal coliforms, Salmonella spp , and Vibrio cholera ) of ready-to-eat exportable Horina shrimp ( Metapenaeus Monoceros) products processed in a sea food processing industry of Bangladesh. For the microbial analyses, samples were collected from cooked IQF (Individual Quick Freezer) shrimp and BF (Block Frozen) shrimp. Microbial analysis was conducted using the standard protocol for counting and identifying microorganisms. Total bacterial load in cooked four samples of Horina shrimp (Br. CPBF, Br. Cooked & peeled BF, Hr. PUD cooked IQF, Br. CP&D BF) were 0.059×10 5 cfu/g, 0,054×10 5 cfu/g, 0.069×10 5 cfu/g, 0.059×10 5 cfu/g, respectively. Total coliform and fecal coliform of cooked shrimps was < 3 MPN/g. Escherichia coli, Salmonella and V. Cholera were totally absent in cooked shrimp products. The data demonstrated that all the values were under the limit of ICMSF recommended microbiological standard might be because of maintaining possible critical control (CCPs) and critical control point (HACCP) system. The result of the present study implies that the Horina shrimp ready-to-eat product in sea food industry from Bangladesh was of excellent quality for export, and posed no risk to human health.
微生物质量评价是海产品加工业的重要组成部分。食品加工企业必须为消费者维护产品的质量和安全。开展这项研究是为了评估孟加拉国海鲜加工业加工的即食出口Horina对虾(monocero后拟虾)产品的微生物负荷(细菌总负荷、粪便大肠菌群、沙门氏菌和霍乱弧菌)。为进行微生物分析,样品采集自煮熟的IQF(单个速冻)对虾和BF(块冻)对虾。微生物分析采用标准方案进行计数和鉴定微生物。4个熟虾样品的细菌总载量(Br。CPBF, Br。煮熟去皮BF, Hr。PUD煮IQF, Br。CP&D BF分别为0.059×10 5 cfu/g、0,054×10 5 cfu/g、0.069×10 5 cfu/g、0.059×10 5 cfu/g。熟虾总大肠菌群和粪便大肠菌群均< 3 MPN/g。熟虾产品中未检出大肠杆菌、沙门氏菌和霍乱弧菌。数据表明,所有微生物值均低于ICMSF推荐的微生物标准限值,可能是由于维持了可能的关键控制(CCPs)和关键控制点(HACCP)系统。本研究的结果表明,孟加拉国海产工业生产的Horina虾即食产品质量优良,适于出口,对人体健康不构成风险。
{"title":"Microbiological evaluation of ready to eat product of Horina (Metapenaeus Monoceros) shrimp at a sea food industry of Bangladesh","authors":"Jahanara Akhter Lipi, Umme Hani Runu, P. Majumdar, M. Hasan, M. Hossain","doi":"10.22271/fish.2023.v11.i3a.2807","DOIUrl":"https://doi.org/10.22271/fish.2023.v11.i3a.2807","url":null,"abstract":"Microbiological quality assessment is a crucial part of sea food processing industries. The food processing companies must safeguard the quality and safety of their products for the consumers. The study was carried out to assess the microbial load (total bacterial load-total coliforms, fecal coliforms, Salmonella spp , and Vibrio cholera ) of ready-to-eat exportable Horina shrimp ( Metapenaeus Monoceros) products processed in a sea food processing industry of Bangladesh. For the microbial analyses, samples were collected from cooked IQF (Individual Quick Freezer) shrimp and BF (Block Frozen) shrimp. Microbial analysis was conducted using the standard protocol for counting and identifying microorganisms. Total bacterial load in cooked four samples of Horina shrimp (Br. CPBF, Br. Cooked & peeled BF, Hr. PUD cooked IQF, Br. CP&D BF) were 0.059×10 5 cfu/g, 0,054×10 5 cfu/g, 0.069×10 5 cfu/g, 0.059×10 5 cfu/g, respectively. Total coliform and fecal coliform of cooked shrimps was < 3 MPN/g. Escherichia coli, Salmonella and V. Cholera were totally absent in cooked shrimp products. The data demonstrated that all the values were under the limit of ICMSF recommended microbiological standard might be because of maintaining possible critical control (CCPs) and critical control point (HACCP) system. The result of the present study implies that the Horina shrimp ready-to-eat product in sea food industry from Bangladesh was of excellent quality for export, and posed no risk to human health.","PeriodicalId":14048,"journal":{"name":"International Journal of Fisheries and Aquatic Studies","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84631376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Acalypha indica supplemented diet on the feeding energetics and growth of fish Labeo rohita 枸杞添加饲料对红颡鱼摄食能量和生长的影响
Pub Date : 2023-05-01 DOI: 10.22271/fish.2023.v11.i3b.2815
Michelle Aquilera, GK Costa, R. Santhiya, Fathimath Nishana, Juli Jefrith, Amala Ancy, J. Vinoliya, J. Mary, M. Mettilda
Aquaculture production relies on the quality of feed and a balanced diet helps to maximize fish yield and profitability. Plant based feed supplements in aquaculture are ideal as growth promoters and immunostimulants. The present study assessed the effect of a medicinal plant, Acalypha indica leaf on the feeding energetics and growth of the freshwater fish, Labeo rohita. Incorporation of different concentrations of Acalypha indica leaf supplemented diet enhanced the assimilation, conversion and metabolic rate when the fish were fed with 20% concentration of A. indica leaf in the feed. The assimilation efficiency as well as the gross conversion efficiencies showed an increase and maximum growth was observed at 20% concentration suggesting the leaf inclusion as a growth promotor.
水产养殖生产依赖于饲料质量,均衡的饮食有助于最大限度地提高鱼类产量和盈利能力。水产养殖中植物性饲料添加剂是理想的生长促进剂和免疫刺激剂。本研究评价了药用植物白果叶对淡水鱼(Labeo rohita)摄食能量和生长的影响。在饲料中添加不同浓度的黑桫椤叶时,在饲料中添加20%浓度的黑桫椤叶可提高鱼的同化、转化和代谢率。同化效率和总转化效率均有所提高,且在20%浓度下生长达到最大值,说明叶片包涵体具有促进生长的作用。
{"title":"Influence of Acalypha indica supplemented diet on the feeding energetics and growth of fish Labeo rohita","authors":"Michelle Aquilera, GK Costa, R. Santhiya, Fathimath Nishana, Juli Jefrith, Amala Ancy, J. Vinoliya, J. Mary, M. Mettilda","doi":"10.22271/fish.2023.v11.i3b.2815","DOIUrl":"https://doi.org/10.22271/fish.2023.v11.i3b.2815","url":null,"abstract":"Aquaculture production relies on the quality of feed and a balanced diet helps to maximize fish yield and profitability. Plant based feed supplements in aquaculture are ideal as growth promoters and immunostimulants. The present study assessed the effect of a medicinal plant, Acalypha indica leaf on the feeding energetics and growth of the freshwater fish, Labeo rohita. Incorporation of different concentrations of Acalypha indica leaf supplemented diet enhanced the assimilation, conversion and metabolic rate when the fish were fed with 20% concentration of A. indica leaf in the feed. The assimilation efficiency as well as the gross conversion efficiencies showed an increase and maximum growth was observed at 20% concentration suggesting the leaf inclusion as a growth promotor.","PeriodicalId":14048,"journal":{"name":"International Journal of Fisheries and Aquatic Studies","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83334228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fishing gears and crafts used in Chalan beel, Bangladesh 孟加拉国查兰比尔使用的渔具和手工艺品
Pub Date : 2023-05-01 DOI: 10.22271/fish.2023.v11.i3a.2808
SN Jahan, M. Perween
The present study was an effort to provide an overview of present status of fishing practices, gears and crafts used in fishing, common species caught by gear of the 5 upzillas of four districts of Chalan beel. The study describes the available fishing gears and crafts used in Chalan beel, Bangladesh. The study was carried out in 7 spots under 5 upazilas of 4 districts such as Atrai upazila (Nawgaon), Singra upazila, Gurudaspur upazila (Natore), Chatmohor upazila (Pabna) and Tarash upazila (Sirajganj), respectively. Eye observation and interview method were applied for the data collection. During the study period, 20 different types of fishing gears were observed. Fishing gears including 9 types of net (Ber jal, Khepla jal, Puti jal, Thela jal, Current jal, Moi jal, Veshal jal, Suti jal and Dharma jal); 4 types of trap (Kholson, Doair, Polo and Vair); 3 types of wounding gears (Koach, Ek kata and Angta) and 4 types of hooks and lines (Chip borsi, Nolborsi, Daun borsi and Jiala) were found. Another 2 types of fishing method were also recorded. Among the available nets in the study area it was recorded that maximum length was 363.33±109.70 fit (Ber jal) and minimum length was 15±5 fit (Dharma Jal). It was also recorded that the maximum and minimum breath were 106.67±15.27 fit (Suti jal) and 2.5±0.5 fit (Puti jal), respectively. Mesh size of net varied from 3±0.5cm (Suti jal) to 0.83±0.52cm (Thela jal). Among the traps maximum length was 2.5±0.5 fit (Kholsun) and minimum length was 1.83±0.28 fit (Vair). Small Indigenous Species (SIS) was mostly caught by the trap with few exception and carnivorous fishes are mainly caught by the fishing hooks and lines. When water level becomes low, wounding gears were used for fishing large size fishes during heavy flood. In Chalan beel 5 crafts (Kosa nauka, Bhot nauka, Jaila nauka, Konai dingi and Vela) were observed. Cost benefit ratio of studied fishing crafts was also calculated. The highest Cost Benefit Ratio (CBR) is 1:0.92 (for Vela). Several problems were found which are responsible for the loss of fish diversity of Chalan beel. Among them, over fishing and use of illegal (Current jal), destruction fishing gears, fishing by blocking (Bana) the migration paths of fishes, excess katha fishing and fishermen caught brood and fry fishes indiscriminately.
本研究的目的是概述查兰比尔四个区的5个乌齐拉的捕鱼方法、渔具和渔具的现状,以及渔具捕获的常见物种。该研究描述了孟加拉国Chalan beel地区可用的渔具和手工艺品。该研究分别在Atrai upazila (Nawgaon)、singgra upazila、Gurudaspur upazila (Natore)、Chatmohor upazila (Pabna)和Tarash upazila (Sirajganj)等4个县5个upazila的7个地点进行。数据采集采用眼观察和访谈法。在研究期间,共观察到20种不同类型的渔具。渔具,包括9种渔网(Ber jal、Khepla jal、Puti jal、Thela jal、Current jal、Moi jal、Veshal jal、Suti jal和Dharma jal);4种捕鼠器(Kholson、Doair、Polo和Vair);发现3种伤齿(Koach、Ek kata和Angta)和4种钩线(Chip borsi、Nolborsi、Daun borsi和Jiala)。另外还记录了两种捕鱼方法。研究区现有网长最长为363.33±109.70倍(Ber jal),最小长度为15±5倍(Dharma jal)。最大呼吸量为106.67±15.27 fit (Suti jal),最小呼吸量为2.5±0.5 fit (Puti jal)。网孔大小从3±0.5cm(苏提)到0.83±0.52cm(西拉)不等。捕集器的最大长度为2.5±0.5 fit (Kholsun),最小长度为1.83±0.28 fit (Vair)。小型本地种(SIS)主要采用诱捕器捕获,少数例外,食肉鱼类主要采用鱼钩和鱼线捕获。当水位变低时,在大洪水期间使用伤害装置捕捞大型鱼类。在Chalan beel观察到5个工艺品(Kosa nauka, Bhot nauka, Jaila nauka, Konai dingi和Vela)。计算了所研究渔船的成本效益比。最高成本效益比(CBR)为1:0.92 (Vela)。发现了导致查兰比目鱼多样性丧失的几个问题。其中,非法过度捕捞和使用(Current jal)、破坏渔具、阻断鱼类洄游路径捕捞(Bana)、过度捕捞和渔民不分青红皂白地捕捞幼鱼和鱼苗。
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引用次数: 0
Reproductive life of the Indian Mackerel Rastrelliger kanagurta (Cuvier 1817) in Uttara Kannada coast, Karnataka, West coast of India 印度西海岸卡纳塔克邦北部卡纳达海岸印度鲭鱼Rastrelliger kanagurta(居维叶1817)的繁殖生活
Pub Date : 2023-05-01 DOI: 10.22271/fish.2023.v11.i3a.2811
Shahina S, S. H.
The investigation on the reproductive life of the Indian Mackerel, Rastrelliger kanagurta (Cuvier 1817) in the Uttara Kannada coast for a period of 13 months was performed from Jan 2018 to Jan 2019. A total of 1299 fishes were dissected for entire period and their biological parameters were investigated. Of these total fishes, 734 fishes were female, 435 were male and 130 were indeterminate. Throughout the year the fishery was present with copiousness in pre-monsoon and post-monsoon period .Significantly the length and total weight of Indian Mackerel, Rastrelliger kanagurta was found to be linear and the Pearson’s correlation was 0.913 ( p <0.005). (Bervian et al ., 2006, Fontoura et al . 2010) found that mooting the fishes can change its growth pattern during its life span and many authors sign it a mark of reproductive intricacy. The total body weight, the gonad weight and the fecundity was at its peak in the monsoon period and the maximum length was observed in the pre monsoon period. By using cumulative frequency method L m was found to be 16.65 cms for males and 17.85 for females in Indian mackerel Rastrelliger kanagurta . The intent of the present work is to built a relationship between length and weight in relation to the size of first maturity of Indian Mackerel Rastrelliger kanagurta also classifying of developmental stages of the gonads and predicting the GSI.
2018年1月至2019年1月,对北卡纳达邦海岸的印度鲭鱼Rastrelliger kanagurta (Cuvier 1817)的生殖寿命进行了为期13个月的调查。研究期间共解剖鱼类1299条,并对其生物学参数进行了研究。在这些鱼类中,雌鱼734条,雄鱼435条,130条不确定。在季风前和季风后,全年渔业都很丰富。印度鲭鱼的长度和总重呈显著的线性关系,Pearson相关系数为0.913 (p <0.005)。(Bervian et al ., 2006; Fontoura et al .)2010)发现,移动鱼类可以改变其生命周期中的生长模式,许多作者认为这是繁殖复杂性的标志。总体重、性腺重量和繁殖力在季风期达到峰值,而长度在季风前达到最大值。利用累积频率法测定印度鲭鱼的lm值,雄鱼为16.65 cm,雌鱼为17.85 cm。本研究的目的是建立长度和重量与印度鲭鱼第一次成熟的大小之间的关系,并对性腺的发育阶段进行分类,并预测GSI。
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引用次数: 0
期刊
International Journal of Fisheries and Aquatic Studies
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