W. T. Taufani, Anhar Solichin, S. Saputra, D. Ayuningrum
Abstract Anchovy is one of the economically important fish in the western part of the northern coast of Central Java. The production of anchovies extends along the coast from Brebes Regency to Batang Regency. Therefore, this study aims to determine the diversity of anchovies on the northern coast of Central Java (Brebes, Tegal, Pemalang, Batang, and Kendal), using a molecular approach. This study was conducted from April to September 2019 in the Laboratory of Tropical Marine Biotechnology, Faculty of Fisheries and Marine Science, Universitas Diponegoro. The descriptive exploratory method was applied in this study with a random sampling technique, while the cytochrome oxidase I (COI) gene was used for molecular identification. An anchovy sample molecularly identified from each region was found by sampling, including BB 3, PML 2, BTG 1, BTG 2, BTG 4, TGL 2, TGL 4, KDL 1, and KDL 4. The base-pair length of 10 anchovy samples from the COI gene amplification result was 600-700 bp. The sequencing and alignment results of the BLAST analysis showed that the ten anchovy samples were included in the type of Encrasicholina heteroloba, Stolephorus commersoni, Stolephorus waitei and Atherinomorus sp., which ranged from 98 to 99% similarity in location. Therefore, it is concluded that there were at least four different species of anchovy on the northern coast of Java. However, further research is suggested to determine the genetic variation of each species for better fisheries management.
{"title":"DNA Barcoding Approach: Assessing Diversity of Economically Important Anchovy on the Northern Coast of Java, Indonesia","authors":"W. T. Taufani, Anhar Solichin, S. Saputra, D. Ayuningrum","doi":"10.2478/cjf-2023-0008","DOIUrl":"https://doi.org/10.2478/cjf-2023-0008","url":null,"abstract":"Abstract Anchovy is one of the economically important fish in the western part of the northern coast of Central Java. The production of anchovies extends along the coast from Brebes Regency to Batang Regency. Therefore, this study aims to determine the diversity of anchovies on the northern coast of Central Java (Brebes, Tegal, Pemalang, Batang, and Kendal), using a molecular approach. This study was conducted from April to September 2019 in the Laboratory of Tropical Marine Biotechnology, Faculty of Fisheries and Marine Science, Universitas Diponegoro. The descriptive exploratory method was applied in this study with a random sampling technique, while the cytochrome oxidase I (COI) gene was used for molecular identification. An anchovy sample molecularly identified from each region was found by sampling, including BB 3, PML 2, BTG 1, BTG 2, BTG 4, TGL 2, TGL 4, KDL 1, and KDL 4. The base-pair length of 10 anchovy samples from the COI gene amplification result was 600-700 bp. The sequencing and alignment results of the BLAST analysis showed that the ten anchovy samples were included in the type of Encrasicholina heteroloba, Stolephorus commersoni, Stolephorus waitei and Atherinomorus sp., which ranged from 98 to 99% similarity in location. Therefore, it is concluded that there were at least four different species of anchovy on the northern coast of Java. However, further research is suggested to determine the genetic variation of each species for better fisheries management.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"65 - 71"},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43401043","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}
Abstract An important aspect of the size-structured stock is the assumption that individuals progress from one size class to another after a certain time. In this study, a total of 2581 monthly samples of the swimming crab Callinectes amnicola were collected from the landings of the artisanal crab fishery in the Cross River, Nigeria over a period of 13 months, from January 2021 to January 2022. Crabs ranged in length from 6.5 cm to 15.5 cm, with most crabs caught during the dry season. The fewest crabs (n=23) were caught in August 2021, and the most (n=662) were caught in January 2021. Because moulting and other physiological obstacles make it difficult to determine crab age, length frequency data were used instead. Swimming crab assessment was based on some basic growth parameters of the von Bertalanffy growth function and the Beverton and Holt growth model. The results showed that the asymptotic length and growth rate were 16.28 cm and 0.940 per year, respectively. The best growth index was estimated to be 2.40, while longevity and mortality were 3.19 years and 3.46 per year, respectively. The calculated exploitation rate of 0.41 was below the guideline of 0.5 and the maximum yield per recruit of 0.421, confirming an underfished stock. Sustainable exploitation of the Cross River swimming crab was recommended by reducing efforts on already exploited fishery resources.
规模结构股票的一个重要方面是假设个体在一段时间后从一个规模类别进入另一个规模类别。在本研究中，从2021年1月至2022年1月的13个月期间，从尼日利亚克罗斯河(Cross River)的手工螃蟹渔业的登陆处收集了每月2581只游蟹(Callinectes amnicola)样本。蟹的体长从6.5厘米到15.5厘米不等，大多数蟹是在旱季捕获的。8月捕获的螃蟹最少(23只)，1月捕获的螃蟹最多(662只)。由于换羽和其他生理障碍使蟹龄难以确定，因此采用长度频率数据代替。对梭子蟹的评价基于von Bertalanffy生长函数和Beverton and Holt生长模型的一些基本生长参数。结果表明，其渐近长度为16.28 cm /年，生长率为0.940 cm /年。最佳生长指数为2.40，寿命和死亡率分别为3.19年和3.46年。计算出的捕捞率为0.41，低于0.5的指导值，每捕捞的最大产量为0.421，证实存在捕捞不足的种群。建议通过减少对已开发渔业资源的努力，对克罗斯河梭子蟹进行可持续开发。
{"title":"Assessing the Size-Structured Stock of the Swimming Crab Callinectes amnicola (Crustacea: Portunidae) in the Cross River, Nigeria","authors":"Samuel Ameh, M. Isah, E. Ayim, Honor T Ifon","doi":"10.2478/cjf-2023-0007","DOIUrl":"https://doi.org/10.2478/cjf-2023-0007","url":null,"abstract":"Abstract An important aspect of the size-structured stock is the assumption that individuals progress from one size class to another after a certain time. In this study, a total of 2581 monthly samples of the swimming crab Callinectes amnicola were collected from the landings of the artisanal crab fishery in the Cross River, Nigeria over a period of 13 months, from January 2021 to January 2022. Crabs ranged in length from 6.5 cm to 15.5 cm, with most crabs caught during the dry season. The fewest crabs (n=23) were caught in August 2021, and the most (n=662) were caught in January 2021. Because moulting and other physiological obstacles make it difficult to determine crab age, length frequency data were used instead. Swimming crab assessment was based on some basic growth parameters of the von Bertalanffy growth function and the Beverton and Holt growth model. The results showed that the asymptotic length and growth rate were 16.28 cm and 0.940 per year, respectively. The best growth index was estimated to be 2.40, while longevity and mortality were 3.19 years and 3.46 per year, respectively. The calculated exploitation rate of 0.41 was below the guideline of 0.5 and the maximum yield per recruit of 0.421, confirming an underfished stock. Sustainable exploitation of the Cross River swimming crab was recommended by reducing efforts on already exploited fishery resources.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"55 - 64"},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45218804","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}
Abstract In Indonesia, sea sand mining was introduced in the late 1970s, and one of the sites is Banten Province, Indonesia. Sea sand mining in Banten waters began in 2003 after the issuance of a permit by the Regent of Serang Regency, namely Decree No. 540/Kep.68/Huk/2003, which was updated by the Regional Regulation of Serang Regency No. 2 of 2013 on the Zoning Plan for Coastal and Small Island Areas in Serang Regency for 2013-2033. Studies related to marine sand mining in Banten, Indonesia are required in accordance with the principle of ecosystem sustainability. The objective of this study is to analyze the impact of sea sand mining on the ecological quality of coral reefs and hydro-oceanographic hue on Tunda Island. The survey method was used to determine the coral reef cover, while the hydrodynamic aspects were carried out by simulating bathymetric data, tidal and wave patterns. In addition, a simulation of sediment distribution was performed to determine the effects of sea sand mining using MIKE 12 sand transport module. The percentage of coral cover in the west, east and south of Tunda Island was 66.00%, 39.67% and 28.15%, respectively. The maximum sea depth around the study site reached 70 m, while it is relatively shallow in the mining area. In the last 14 years, the prevailing wave height ranged from 0.5-0.75 m or 49.02%, and 0.25-0.50 m or 36.69%. In addition, the concentration of TSS was relatively high, ranging from 40 mg/l to 60 mg/l. From the results, the most commonly observed impact of sea sand mining off Tunda Island was the high concentration of TSS. This can be prevented by rotating TSHD vessels, especially in the areas adjacent to Tunda Island.
{"title":"Investigating Impact of Sea Sand Mining in Tunda Island Waters, Indonesia Based in Mike 21 Modelling","authors":"W. Wahyudi, D. Martono, S. Utomo, D. Sutjiningsih","doi":"10.2478/cjf-2023-0009","DOIUrl":"https://doi.org/10.2478/cjf-2023-0009","url":null,"abstract":"Abstract In Indonesia, sea sand mining was introduced in the late 1970s, and one of the sites is Banten Province, Indonesia. Sea sand mining in Banten waters began in 2003 after the issuance of a permit by the Regent of Serang Regency, namely Decree No. 540/Kep.68/Huk/2003, which was updated by the Regional Regulation of Serang Regency No. 2 of 2013 on the Zoning Plan for Coastal and Small Island Areas in Serang Regency for 2013-2033. Studies related to marine sand mining in Banten, Indonesia are required in accordance with the principle of ecosystem sustainability. The objective of this study is to analyze the impact of sea sand mining on the ecological quality of coral reefs and hydro-oceanographic hue on Tunda Island. The survey method was used to determine the coral reef cover, while the hydrodynamic aspects were carried out by simulating bathymetric data, tidal and wave patterns. In addition, a simulation of sediment distribution was performed to determine the effects of sea sand mining using MIKE 12 sand transport module. The percentage of coral cover in the west, east and south of Tunda Island was 66.00%, 39.67% and 28.15%, respectively. The maximum sea depth around the study site reached 70 m, while it is relatively shallow in the mining area. In the last 14 years, the prevailing wave height ranged from 0.5-0.75 m or 49.02%, and 0.25-0.50 m or 36.69%. In addition, the concentration of TSS was relatively high, ranging from 40 mg/l to 60 mg/l. From the results, the most commonly observed impact of sea sand mining off Tunda Island was the high concentration of TSS. This can be prevented by rotating TSHD vessels, especially in the areas adjacent to Tunda Island.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"73 - 81"},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45299877","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}
Abstract A fish kill is characterised by the death of a large number of fish in a given area within a short period of time. This is an indicator that water quality and ecosystem conditions in general have deteriorated. Remote sensing data from the MODIS instrument on the Aqua and Merra-2 satellites were accessed from 18 to 22 March 2020, a period that spans before and after the fish kill was reported. Analysis of the remote sensing data shows that the fish kill was preceded by strong winds, i.e. major and sustained wind events. The maps of sea surface temperatures prior to the fish kill show that high-temperature water masses flowed from the equator toward the Bonny-Andoni coast. The dates of occurrence of the high-temperature surface water masses and high wind events around the Bonny-Andoni coastal area were consistent with the location and timing of the fish kill, as indicated by community reports. We hypothesise that the low-oxygen, high-temperature surface water masses passing from the equator on the windward side of the coast may have encountered migrating croakers and trapped an entire school of this benthopelagic fish species, causing acute respiratory distress. The results and hypothesis confirm local reports of gasping fish about 2 nautical miles off the Bonny-Andoni coast. This study confirms the relationship between wind patterns, temperature, and fish kills, providing the first empirical account of probable causes. Because fish kills occur episodically and often leave no trace, this report and future analyses of remote sensing data may be the best way to elucidate this event.
{"title":"First Report of Fishkill Incidence in Bonny-Andoni Coastal Area, Nigeria","authors":"A. Chukwuka","doi":"10.2478/cjf-2023-0010","DOIUrl":"https://doi.org/10.2478/cjf-2023-0010","url":null,"abstract":"Abstract A fish kill is characterised by the death of a large number of fish in a given area within a short period of time. This is an indicator that water quality and ecosystem conditions in general have deteriorated. Remote sensing data from the MODIS instrument on the Aqua and Merra-2 satellites were accessed from 18 to 22 March 2020, a period that spans before and after the fish kill was reported. Analysis of the remote sensing data shows that the fish kill was preceded by strong winds, i.e. major and sustained wind events. The maps of sea surface temperatures prior to the fish kill show that high-temperature water masses flowed from the equator toward the Bonny-Andoni coast. The dates of occurrence of the high-temperature surface water masses and high wind events around the Bonny-Andoni coastal area were consistent with the location and timing of the fish kill, as indicated by community reports. We hypothesise that the low-oxygen, high-temperature surface water masses passing from the equator on the windward side of the coast may have encountered migrating croakers and trapped an entire school of this benthopelagic fish species, causing acute respiratory distress. The results and hypothesis confirm local reports of gasping fish about 2 nautical miles off the Bonny-Andoni coast. This study confirms the relationship between wind patterns, temperature, and fish kills, providing the first empirical account of probable causes. Because fish kills occur episodically and often leave no trace, this report and future analyses of remote sensing data may be the best way to elucidate this event.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"83 - 91"},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43795019","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}
Abstract Fluvalinate and esfenvalerate are pyrethroid insecticides and are used to control insect pests. These pesticides can enter the aquatic environment in different ways after use, causing toxicity. Tarek is a fish of the Cyprinidae family native to the Lake Van basin in Turkey. This study was conducted to determine the acute toxicity of fluvalinate and esfenvalerate to adult tarek. In the bioassays, tarek with an average length of 20.6±1.2 cm and an average weight of 93.9±14.0 g were used for fluvalinate, while an average length of 19.7±1.2 cm and an average weight of 85.5±16.6 g were used for esfenvalerate. Fish were exposed to fluvalinate using the semi-static test method, and esfenvalerate using the static test method. The toxicity tests were performed under the natural photoperiod. The concentrations used for fluvalinate were 0.15, 0.30, 0.45, 0.60 µg L−1, while for esfenvalerate they were 0.33, 0.67, 1.00, 1.34 µg L−1. The tests were performed at 13±1 °C for 96 hours with dechlorinated tap water. At the end of the toxicity tests, the mean lethal concentration (LC50) of fluvalinate after 96 hours was determined to be 0.338 (0.230-0.477) µg L−1 and the above concentration of esfenvalerate was determined to be 0.475 (0.293-0.640) µg L−1 for adult tarek. Tarek exposed to fluvalinate and esfenvalerate showed toxic effects throughout the test, such as splashing, vigorous and then slower swimming, loss of balance, increased respiratory rate and contraction. Consequently, fluvalinate and esfenvalerate were found to be highly toxic to tarek and therefore the concentration of fluvalinate should not exceed 0.003 µg L−1, and that of esfenvalerate should not exceed 0.005 µg L−1 in freshwater environments where tarek lives.
氟戊酸酯和依氰戊酸酯是拟除虫菊酯类杀虫剂，主要用于防治害虫。这些农药在使用后会以不同的方式进入水生环境，产生毒性。Tarek是一种鲤科鱼，原产于土耳其的凡湖盆地。本研究旨在确定氟valinate和esfenvalate对成年大鼠的急性毒性。氟valinate的平均长度为20.6±1.2 cm，平均重量为93.9±14.0 g，而esfenvalate的平均长度为19.7±1.2 cm，平均重量为85.5±16.6 g。鱼类使用半静态试验方法暴露于氟戊酸盐，使用静态试验方法暴露于埃斯氰戊酸盐。在自然光周期下进行毒性试验。氟valinate的浓度分别为0.15、0.30、0.45、0.60µg L - 1，而esfenvalate的浓度分别为0.33、0.67、1.00、1.34µg L - 1。试验在13±1°C条件下用脱氯自来水进行96小时。毒性试验结束时，氟戊酸96 h后的平均致死浓度(LC50)为0.338(0.230-0.477)µg L−1，依氰戊酸96 h后的平均致死浓度(LC50)为0.475(0.293-0.640)µg L−1。在整个试验过程中，暴露于氟valinate和esfenvalerate的Tarek表现出了毒性作用，比如溅水、剧烈游泳，然后游泳速度变慢、失去平衡、呼吸频率增加和收缩。因此，氟戊酸盐和依氰戊酸盐被发现对天牛剧毒，因此在天牛生活的淡水环境中，氟戊酸盐的浓度不应超过0.003µg L - 1，依氰戊酸盐的浓度不应超过0.005µg L - 1。
{"title":"Susceptibility of Fluvalinate and Esfenvalerate on Adult Tarek Alburnus tarichi (Güldenstädt 1814)","authors":"Ertuğrul Kankaya","doi":"10.2478/cjf-2023-0006","DOIUrl":"https://doi.org/10.2478/cjf-2023-0006","url":null,"abstract":"Abstract Fluvalinate and esfenvalerate are pyrethroid insecticides and are used to control insect pests. These pesticides can enter the aquatic environment in different ways after use, causing toxicity. Tarek is a fish of the Cyprinidae family native to the Lake Van basin in Turkey. This study was conducted to determine the acute toxicity of fluvalinate and esfenvalerate to adult tarek. In the bioassays, tarek with an average length of 20.6±1.2 cm and an average weight of 93.9±14.0 g were used for fluvalinate, while an average length of 19.7±1.2 cm and an average weight of 85.5±16.6 g were used for esfenvalerate. Fish were exposed to fluvalinate using the semi-static test method, and esfenvalerate using the static test method. The toxicity tests were performed under the natural photoperiod. The concentrations used for fluvalinate were 0.15, 0.30, 0.45, 0.60 µg L−1, while for esfenvalerate they were 0.33, 0.67, 1.00, 1.34 µg L−1. The tests were performed at 13±1 °C for 96 hours with dechlorinated tap water. At the end of the toxicity tests, the mean lethal concentration (LC50) of fluvalinate after 96 hours was determined to be 0.338 (0.230-0.477) µg L−1 and the above concentration of esfenvalerate was determined to be 0.475 (0.293-0.640) µg L−1 for adult tarek. Tarek exposed to fluvalinate and esfenvalerate showed toxic effects throughout the test, such as splashing, vigorous and then slower swimming, loss of balance, increased respiratory rate and contraction. Consequently, fluvalinate and esfenvalerate were found to be highly toxic to tarek and therefore the concentration of fluvalinate should not exceed 0.003 µg L−1, and that of esfenvalerate should not exceed 0.005 µg L−1 in freshwater environments where tarek lives.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"50 6","pages":"49 - 53"},"PeriodicalIF":0.0,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41288211","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}
A. Andem, C. Odey, Solomon B. Beshel, Opeyemi Babasegun Ojo, M. Etuk
Abstract South-eastern Nigeria’s tropical water ecosystems typically consist of mangrove swamps and riparian forests, both of which have become endangered in the last six decades. The purpose of this research was to determine the extent of human-induced impact and activities on the effect of water quality on the distribution and diversity of benthic macroinvertebrates and fish fauna in the Tropical River (Ikang). The river’s surface water, benthic macroinvertebrates, and fish fauna were sampled and identified to create a database of reference information. Twelve (12) species of benthic macroinvertebrates from two (2) phyla were identified. Station 1 had the highest benthic macroinvertebrate abundance of 58 (35.65%), while Station 3 had the lowest abundance of 52 (31.70%). Uca tangeri was the most abundant benthic macroinvertebrate with a percentage abundance of 28 (17.07%), while Dinocras sp., Macromia sp., and Gomphus sp. were the least abundant benthic macroinvertebrates with a percentage abundance of 3.66%. In addition, seven (7) fish species from six (6) families were identified. During the study, the family Claroteidae was the most abundant, while the family Carangidae was the least abundant. The temperature of the river had a positive correlation with the families Carangidae and Mugilidae, a negative correlation with the family Clupeidae, and no correlation with the family Claroteidae. Total dissolved solids (TDS) correlated positively with the families Carangidae, Mugilidae, and Clariidae, while conductivity correlated positively only with the family Sciaenidae and negatively with the families Carangidae, Mugilidae and Clariidae. The abundance and diversity of benthic macroinvertebrates and fish fauna were generally influenced by the physical and chemical characteristics of the water, the availability of food, and the extent of human impacts and activities. In order to ensure sustainable water quality and biodiversity conservation in our environment, it is necessary to manage the river and the surrounding ecosystem appropriately.
{"title":"Human-Induced Impact on the Distribution and Diversity of Benthic Macroinvertebrates and Fish Fauna in the Tropical Ikang River, Nigeria","authors":"A. Andem, C. Odey, Solomon B. Beshel, Opeyemi Babasegun Ojo, M. Etuk","doi":"10.2478/cjf-2023-0001","DOIUrl":"https://doi.org/10.2478/cjf-2023-0001","url":null,"abstract":"Abstract South-eastern Nigeria’s tropical water ecosystems typically consist of mangrove swamps and riparian forests, both of which have become endangered in the last six decades. The purpose of this research was to determine the extent of human-induced impact and activities on the effect of water quality on the distribution and diversity of benthic macroinvertebrates and fish fauna in the Tropical River (Ikang). The river’s surface water, benthic macroinvertebrates, and fish fauna were sampled and identified to create a database of reference information. Twelve (12) species of benthic macroinvertebrates from two (2) phyla were identified. Station 1 had the highest benthic macroinvertebrate abundance of 58 (35.65%), while Station 3 had the lowest abundance of 52 (31.70%). Uca tangeri was the most abundant benthic macroinvertebrate with a percentage abundance of 28 (17.07%), while Dinocras sp., Macromia sp., and Gomphus sp. were the least abundant benthic macroinvertebrates with a percentage abundance of 3.66%. In addition, seven (7) fish species from six (6) families were identified. During the study, the family Claroteidae was the most abundant, while the family Carangidae was the least abundant. The temperature of the river had a positive correlation with the families Carangidae and Mugilidae, a negative correlation with the family Clupeidae, and no correlation with the family Claroteidae. Total dissolved solids (TDS) correlated positively with the families Carangidae, Mugilidae, and Clariidae, while conductivity correlated positively only with the family Sciaenidae and negatively with the families Carangidae, Mugilidae and Clariidae. The abundance and diversity of benthic macroinvertebrates and fish fauna were generally influenced by the physical and chemical characteristics of the water, the availability of food, and the extent of human impacts and activities. In order to ensure sustainable water quality and biodiversity conservation in our environment, it is necessary to manage the river and the surrounding ecosystem appropriately.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"1 - 12"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49148011","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}
S. Shumka, Suada Lalaj, R. Šanda, Laura Shumka, P. Meulenbroek
Abstract In this article, we provide an updated list of freshwater fishes in Albania for each sub-basin. The distribution data and taxa-lists presented are based on a literature review up to October 2022 and intensive fieldwork conducted in the last 15 years. Distributional records of 101 fish species (deriving from 25 families) in 11 different sub-basins are reported. There are new records that include native, alien and translocated fish species. The distinctiveness of Albanian freshwater fishes is highlighted while defining a specific ichthyological region for the whole Balkan region. The freshwater fish fauna of Albania represents a special value of the national heritage, especially due to its diversity and a high degree of endemicity. This is mainly due to the complex geological and climatic conditions, and the location between the Adriatic and Ionian Seas on the west and the continental areas of the Balkans on the other side, which have allowed different colonization from outside the area and long periods of speciation. Eleven hydrographic basin units are analyzed for species composition, evolutionary patterns, and ecological features. This review brings the number of Albanian freshwater fish taxa to 101, with 20 species added from the previous 1995 inventory and several species deleted due to taxonomic changes.
{"title":"Recent Data on the Distribution of Freshwater Ichthyofauna in Albania","authors":"S. Shumka, Suada Lalaj, R. Šanda, Laura Shumka, P. Meulenbroek","doi":"10.2478/cjf-2023-0004","DOIUrl":"https://doi.org/10.2478/cjf-2023-0004","url":null,"abstract":"Abstract In this article, we provide an updated list of freshwater fishes in Albania for each sub-basin. The distribution data and taxa-lists presented are based on a literature review up to October 2022 and intensive fieldwork conducted in the last 15 years. Distributional records of 101 fish species (deriving from 25 families) in 11 different sub-basins are reported. There are new records that include native, alien and translocated fish species. The distinctiveness of Albanian freshwater fishes is highlighted while defining a specific ichthyological region for the whole Balkan region. The freshwater fish fauna of Albania represents a special value of the national heritage, especially due to its diversity and a high degree of endemicity. This is mainly due to the complex geological and climatic conditions, and the location between the Adriatic and Ionian Seas on the west and the continental areas of the Balkans on the other side, which have allowed different colonization from outside the area and long periods of speciation. Eleven hydrographic basin units are analyzed for species composition, evolutionary patterns, and ecological features. This review brings the number of Albanian freshwater fish taxa to 101, with 20 species added from the previous 1995 inventory and several species deleted due to taxonomic changes.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"33 - 44"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47181787","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}
Abstract Accurate reorganization of harvested species is essential for appropriate fisheries monitoring but often unnoticed. In this study, an attempt was made to provide an accurate species description based on fish taxonomy and otolith shape parameters of nine sea catfishes living in Pakistan. The lapillus, the largest otolith of catfishes, includes the position of the umbo, the structure of the anterior mesial projection (amp), the incisura linea basalis (ilb) and sulcus lapilli marks (slm) in nine ariid catfishes were evaluated. Discriminant function analysis was performed using twenty-two morphometric parameters showed significant variations between the length of the maxillary barbel, adipose length and preorbital length, which were highlighted as basic discriminating characters. Species without barbells, such as Batrachocephalus mino and Osteogeneiosus militaris, were found to be distant. The taxonomic characters of the genera Netuma and Plicofollis overlapped due to a short adipose fin length. Nevertheless, species Arius arius, Sciades sona and Nemapterxy caelatus differed in a moderate adipose fin length. The preorbital length of Netuma bilineata has a short and rounded snout, while N. thalassina has a long and pointed snout, which is a distinguishing characteristic of both species. The coincident use of fish taxonomy and otolith shape parameters is an effective tool for catfish identification could be helpful in appropriate fisheries sampling programs and management in Pakistan whenever implemented.
{"title":"Taxonomic and Otolith Shape Parameters of Nine Sympatric Catfishes Commercially Harvested in Pakistan","authors":"Noureen Farooq, S. Panhwar","doi":"10.2478/cjf-2023-0003","DOIUrl":"https://doi.org/10.2478/cjf-2023-0003","url":null,"abstract":"Abstract Accurate reorganization of harvested species is essential for appropriate fisheries monitoring but often unnoticed. In this study, an attempt was made to provide an accurate species description based on fish taxonomy and otolith shape parameters of nine sea catfishes living in Pakistan. The lapillus, the largest otolith of catfishes, includes the position of the umbo, the structure of the anterior mesial projection (amp), the incisura linea basalis (ilb) and sulcus lapilli marks (slm) in nine ariid catfishes were evaluated. Discriminant function analysis was performed using twenty-two morphometric parameters showed significant variations between the length of the maxillary barbel, adipose length and preorbital length, which were highlighted as basic discriminating characters. Species without barbells, such as Batrachocephalus mino and Osteogeneiosus militaris, were found to be distant. The taxonomic characters of the genera Netuma and Plicofollis overlapped due to a short adipose fin length. Nevertheless, species Arius arius, Sciades sona and Nemapterxy caelatus differed in a moderate adipose fin length. The preorbital length of Netuma bilineata has a short and rounded snout, while N. thalassina has a long and pointed snout, which is a distinguishing characteristic of both species. The coincident use of fish taxonomy and otolith shape parameters is an effective tool for catfish identification could be helpful in appropriate fisheries sampling programs and management in Pakistan whenever implemented.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"23 - 32"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46782539","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}
Tabasum Yousuf, Yahya Bakhtiyar, S. Andrabi, G. B. Wani
Abstract For aquaculture assessments, the length-weight relationship and condition factor are considered as standard methods for determining fish growth, its health and the potential yield. A year-long study was conducted to calculate length-weight relationships (LWRs) and condition factor (K) for seven fish species, Schizothorax niger (Alghad or snowtrout), S. curvifrons (Sattar snowtrout), Cyprinus carpio (Common carp), Carassius carassius (Crucian carp), Pethia conchonius (Rosy barb), Crossocheilus diplochilus (Kashmir latia) and Gambusia holbrooki (Mosquito fish) in Manasbal Lake. The results revealed that four captured fish species (S. niger, S. curvifrons, C. diplochilus and G. holbrooki) exhibited negative allometric growth, while other fish species (C. carpio, C. carassius, P. conchonius) exhibited positive allometric growth. LWR was significant at P < 0.01 in all seven fish species, with a coefficient of determination (R2) ranging between 0.73 to 0.96. The K was higher in C. carpio than C. carassius, P. conchonius, G. holbrooki, C. diplochilus, S. niger and S. curvifrons. The current study providing the LWRs and condition factor of seven fish species from Manasbal Lake, Kashmir will be helpful for the management of fish species as well as for assessing the ecological condition of the Lake.
{"title":"Length-Weight Relationship and Condition Factor of Seven Fish Species in Manasbal Lake, Kashmir, India","authors":"Tabasum Yousuf, Yahya Bakhtiyar, S. Andrabi, G. B. Wani","doi":"10.2478/cjf-2023-0002","DOIUrl":"https://doi.org/10.2478/cjf-2023-0002","url":null,"abstract":"Abstract For aquaculture assessments, the length-weight relationship and condition factor are considered as standard methods for determining fish growth, its health and the potential yield. A year-long study was conducted to calculate length-weight relationships (LWRs) and condition factor (K) for seven fish species, Schizothorax niger (Alghad or snowtrout), S. curvifrons (Sattar snowtrout), Cyprinus carpio (Common carp), Carassius carassius (Crucian carp), Pethia conchonius (Rosy barb), Crossocheilus diplochilus (Kashmir latia) and Gambusia holbrooki (Mosquito fish) in Manasbal Lake. The results revealed that four captured fish species (S. niger, S. curvifrons, C. diplochilus and G. holbrooki) exhibited negative allometric growth, while other fish species (C. carpio, C. carassius, P. conchonius) exhibited positive allometric growth. LWR was significant at P < 0.01 in all seven fish species, with a coefficient of determination (R2) ranging between 0.73 to 0.96. The K was higher in C. carpio than C. carassius, P. conchonius, G. holbrooki, C. diplochilus, S. niger and S. curvifrons. The current study providing the LWRs and condition factor of seven fish species from Manasbal Lake, Kashmir will be helpful for the management of fish species as well as for assessing the ecological condition of the Lake.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"13 - 22"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45766867","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}
Abstract The aim of this research is to analyse the trends of the total artisanal fish catch in the Croatian section of the Sava River. All 17 years of the study (2004-2020) showed a negative trend that became highly statistically significant (p<0.01) in the last eight years. In addition to the total catch, the catch per unit effort (CPUE) also decreased significantly (p<0.05) throughout the study. The reasons for these negative trends are discussed, including a possible decline in artisanal interest, higher fishing pressure from anglers from the Croatian side and both groups of fishermen from the river bank of Bosnia and Herzegovina, as well as negative influence of the polluted waters of the large Bosnian river Bosna, which prior to flowing into the lower section of the Sava River, passes through urban and industrial cities. It is suggested to activate the old idea of a common fisheries management body that would include both groups of fishermen (anglers and artisanal fishermen), government representatives and scientists from both countries.
{"title":"Decline of Artisanal Fisheries in the Croatian Section of the Sava River","authors":"T. Treer","doi":"10.2478/cjf-2023-0005","DOIUrl":"https://doi.org/10.2478/cjf-2023-0005","url":null,"abstract":"Abstract The aim of this research is to analyse the trends of the total artisanal fish catch in the Croatian section of the Sava River. All 17 years of the study (2004-2020) showed a negative trend that became highly statistically significant (p<0.01) in the last eight years. In addition to the total catch, the catch per unit effort (CPUE) also decreased significantly (p<0.05) throughout the study. The reasons for these negative trends are discussed, including a possible decline in artisanal interest, higher fishing pressure from anglers from the Croatian side and both groups of fishermen from the river bank of Bosnia and Herzegovina, as well as negative influence of the polluted waters of the large Bosnian river Bosna, which prior to flowing into the lower section of the Sava River, passes through urban and industrial cities. It is suggested to activate the old idea of a common fisheries management body that would include both groups of fishermen (anglers and artisanal fishermen), government representatives and scientists from both countries.","PeriodicalId":38161,"journal":{"name":"Ribarstvo, Croatian Journal of Fisheries","volume":"81 1","pages":"45 - 48"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43467682","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}
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