3区农林科学

Fishes Pub Date : 2023-11-10 DOI: 10.3390/fishes8110548

Michael J. Miller

{"title":"43 Years after H.G. Moser’s Seminal “Morphological and Functional Aspects of Marine Fish Larvae”: The Commonalities of Leptocephali and Larvae of Other Marine Teleosts","authors":"Michael J. Miller","doi":"10.3390/fishes8110548","DOIUrl":"https://doi.org/10.3390/fishes8110548","url":null,"abstract":"H.G. Moser was not particularly well known regarding the Elopomorpha, but he began his seminal 1981 fish larvae morphology review by describing the mysteries of European eels and their leptocephali, and he eventually described some California Current leptocephali. Descriptions of all types of leptocephali and then microscope photographs have revealed complex pigmentation patterns and diverse body shapes that parallel the features of the other teleost fish larvae that his review showed so clearly, some of which appear to mimic gelatinous zooplankton (GZ). Most recently, underwater photographs and video of leptocephali indicate that predator avoidance through transparency, shape-change-mediated mimicry, or morphological features have evolved in response to natural selection from predation in ways generally similar to other fish larvae. Several families of leptocephali perform remarkable curling into round or flattened shapes or use expandable chromatophores when threatened, which appears to mimic GZ for predation reduction. Like a number of other teleost fish larvae, some leptocephali have body extensions or telescopic eyes, and at least one has a long caudal filament with pigmented swellings that is similar to the remarkable GZ mimicry appendages of some fish larvae. The morphology and use of mimicry of leptocephali in comparison to other fish larvae is reviewed as a tribute to H.G. Moser’s remarkable career.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":" December","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth Performance, Feed Utilisation, Digestive and Metabolic Enzyme Activity, and Liver Morphohistology in Hybrid Tilapia (Oreochromis mossambicus × Oreochromis niloticus) Juveniles Fed with the Inclusion of Chitosan in Their Diet 壳聚糖对杂交罗非鱼生长性能、饲料利用率、消化代谢酶活性和肝脏形态组织学的影响

3区农林科学

Fishes Pub Date : 2023-11-09 DOI: 10.3390/fishes8110546

Yuniel Méndez-Martínez, Alan Rodrigo Vera-Veliz, Edilmar Cortés-Jacinto, Yanis Cruz-Quintana, Aroldo Botello-Leon, Pedro Daniel Mendoza-Carranza, Natalia S. Calvo

{"title":"Growth Performance, Feed Utilisation, Digestive and Metabolic Enzyme Activity, and Liver Morphohistology in Hybrid Tilapia (Oreochromis mossambicus × Oreochromis niloticus) Juveniles Fed with the Inclusion of Chitosan in Their Diet","authors":"Yuniel Méndez-Martínez, Alan Rodrigo Vera-Veliz, Edilmar Cortés-Jacinto, Yanis Cruz-Quintana, Aroldo Botello-Leon, Pedro Daniel Mendoza-Carranza, Natalia S. Calvo","doi":"10.3390/fishes8110546","DOIUrl":"https://doi.org/10.3390/fishes8110546","url":null,"abstract":"This study aimed to evaluate the growth performance, feed utilisation, digestive and metabolic enzyme activity, and liver histology in juveniles of hybrid red tilapia (Oreochromis mossambicus × Oreochromis niloticus) fed with the inclusion of chitosan in their diet. Six dietary chitosan levels (0 “control’’, 10, 20, 30, 40, and 50 g kg−1) were used to feed juvenile fish (initial weight 7.50 ± 0.20 g) that were cultured for eight weeks in 18 tanks at a density of 15 fish/tank. The growth performance presented significant differences (p ˂ 0.05) for weight gain, specific growth rate, feed conversion ratio, hepatosomatic index, and survival rate. The digestive and metabolic enzyme activities were significantly (p < 0.05) influenced by the levels of chitosan in the administered diet. Histologically, no damage was found in the liver; however, morphometrically, a significant difference (p < 0.05) was found in the hepatocyte area and sinusoid area. Vacuolisation of hepatocytes was found in treatments with 40 and 50 g kg−1 of chitosan in the diet. Treatments with doses of chitosan showed a better response (p < 0.05) compared to the control treatment in most of the different groups of variables analysed. The result of the principal component analysis suggests that a diet containing 40 g kg−1 of chitosan is optimal for tilapia growth performance.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":" 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Changes in the Functional Role of the Tejo Estuary (Portugal, Europe) According to Fish Ecological Guilds 根据鱼类生态协会，特茹河口(葡萄牙，欧洲)功能角色的变化

3区农林科学

Fishes Pub Date : 2023-11-08 DOI: 10.3390/fishes8110545

Susana França

{"title":"Changes in the Functional Role of the Tejo Estuary (Portugal, Europe) According to Fish Ecological Guilds","authors":"Susana França","doi":"10.3390/fishes8110545","DOIUrl":"https://doi.org/10.3390/fishes8110545","url":null,"abstract":"Estuaries are extremely productive ecosystems, providing habitats for numerous aquatic species and crucial ecological services. The Tejo estuary, one of the largest European estuaries, has been thoroughly studied, and its important functional role as a nursery for several commercially important fish species is already established. In the present work, a trait-based approach was applied to functionally describe the fish community structure of the Tejo estuary and to enlighten potential changes in the ecosystem functioning at this level, following environmental changes expected to occur. To predict the distribution of species from the two most representative ecological guilds of the Tejo estuary, estuarine residents and marine migrants, species distribution models were built using an ensemble technique (combining forecasts of single models). The predictions obtained were more accurate for the marine migrants and the species distribution was strongly related with salinity, whereas estuarine species, were also influenced by depth, habitat type and river flow. The potential distributions of these ecological guilds showed that marine migrants will tend to use upstream areas in the estuary, where salinity is lower. Nonetheless, salinity is expected to increase as extreme weather events such as droughts tend to occur more frequently, decreasing favorable habitat availability for these species, and thus threatening the crucial role this ecosystem plays for these species.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"356 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135392584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic Diversity and Genetic Structure among Four Selected Strains of Whiteleg Shrimp (Litopenaeus vannamei) Using SSR Markers 利用SSR标记对凡纳滨对虾(Litopenaeus vannamei) 4个品系的遗传多样性和遗传结构分析

3区农林科学

Fishes Pub Date : 2023-11-06 DOI: 10.3390/fishes8110544

Zhe Zhang, Chengkuan Lu, Kebing Lin, Weiwei You, Zhangwu Yang

{"title":"Genetic Diversity and Genetic Structure among Four Selected Strains of Whiteleg Shrimp (Litopenaeus vannamei) Using SSR Markers","authors":"Zhe Zhang, Chengkuan Lu, Kebing Lin, Weiwei You, Zhangwu Yang","doi":"10.3390/fishes8110544","DOIUrl":"https://doi.org/10.3390/fishes8110544","url":null,"abstract":"The whiteleg shrimp (Litopenaeus vannamei) is one of the most economically important aquaculture species in China. Genetic diversity is crucial for maintaining the gene pool of farmed shrimp. In this study, the effects of artificial selection on the genetic structure of four whiteleg shrimp strains were evaluated using microsatellite sequences. The results showed that the observed heterozygosity (Ho), expected heterozygosity (He), and the polymorphism information content (PIC) of the four selected strains ranged from 0.446 to 0.574, 0.450 to 0.566, and 0.435 to 0.509, respectively. All the selected strains maintained a moderate level of genetic diversity. Most inbreeding coefficients (Fis) in the four strains were positive but not significantly different from zero, indicating a relatively low degree of inbreeding within each strain. However, He and PIC in line 5 showed a decreasing trend from the 2017 to the 2019 generations, and Fis in line 10 showed a significant increasing trend across generations, indicating that measures must be taken to maintain the level of genetic diversity for lines 5 and 10. UPGMA cluster trees showed that the four breeding lines had apparent genetic differences, which could provide a genetic basis for studying crossbreeding between selective lines and the utilization of heterosis. This study will be useful for population genetic research and the breeding strategies of whiteleg shrimp.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"3 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135589734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biofloc Application Using Aquaponics and Vertical Aquaculture Technology in Aquaculture: Review 水培和垂直养殖技术在水产养殖中的应用综述

3区农林科学

Fishes Pub Date : 2023-11-04 DOI: 10.3390/fishes8110543

Young-Bin Yu, Jae-Ho Choi, Ju-Hyeong Lee, A-Hyun Jo, Sung Won Han, Song-Hun Han, Hee Jae Choi, Cheol Young Choi, Ju-Chan Kang, EunYoung Min, Jun-Hwan Kim

{"title":"Biofloc Application Using Aquaponics and Vertical Aquaculture Technology in Aquaculture: Review","authors":"Young-Bin Yu, Jae-Ho Choi, Ju-Hyeong Lee, A-Hyun Jo, Sung Won Han, Song-Hun Han, Hee Jae Choi, Cheol Young Choi, Ju-Chan Kang, EunYoung Min, Jun-Hwan Kim","doi":"10.3390/fishes8110543","DOIUrl":"https://doi.org/10.3390/fishes8110543","url":null,"abstract":"Some aspects of traditional aquaculture have negative impacts on the aquatic environment, leading to pollution and disease outbreaks in farmed organisms. Biofloc technology (BFT) is a closed aquaculture system that utilizes specific microbial communities to remove ammonia emitted from aquaculture organisms or adds carbon to the aquaculture system to improve water quality. BFT has benefits, such as increasing production and improving water quality, and reducing disease spread and pollution, without the need for water exchange. However, there are disadvantages, such as rapid changes in water quality due to accumulation of dissolved nutrients and total suspended soils (TSS) and the requirement for expensive aeration equipment to maintain dissolved oxygen. BFT can be enhanced in value and efficiency by combining it with other aquaculture technologies, such as aquaponics and vertical aquaculture to overcome the disadvantages. The integration of biofloc with technologies from the fourth industrial revolution holds potential for further development, while aquaponics and vertical farming can eliminate geographical limitations and accelerate the urbanization of aquaculture. The integration of aquaponics and vertical aquaculture with BFT has potential for development, accelerating the urbanization of aquaculture and removing geographic limitations.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"39 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frass from Black Soldier Fly Larvae, Hermetia illucens, as a Possible Functional Dietary Ingredient in Channel Catfish Feed 黑兵蝇幼虫提取物作为海峡鲶鱼饲料中可能的功能性成分

3区农林科学

Fishes Pub Date : 2023-11-02 DOI: 10.3390/fishes8110542

Mediha Yıldırım-Aksoy, Rashida Eljack, Janset Aksoy, Benjamin H. Beck

{"title":"Frass from Black Soldier Fly Larvae, Hermetia illucens, as a Possible Functional Dietary Ingredient in Channel Catfish Feed","authors":"Mediha Yıldırım-Aksoy, Rashida Eljack, Janset Aksoy, Benjamin H. Beck","doi":"10.3390/fishes8110542","DOIUrl":"https://doi.org/10.3390/fishes8110542","url":null,"abstract":"Frass–the by-product of the larva meal industry–was recently shown to be a sustainable ingredient for use in diets of several fish species. Additionally, because of its possible immunomodulatory activity and anti-microbial properties, frass may have great potential as an organic method of pathogen control in aquaculture. Five diets containing 0, 5, 10, 20 and 30% frass from black soldier fly larvae, Hermetia illucens, were fed to channel catfish (5.24 ± 0.04 g) in quadruplicate aquaria to apparent satiation twice daily. At the end of the 10-week feeding trial, blood samples were collected from all groups to measure hematological and immune parameters, and to determine the effects of dietary frass on resistance to Flavobacterium covae infection. Hematological parameters (red blood cell count, hemoglobin, and hematocrit)—but not white blood cell count—were improved with the inclusion of frass. Serum glucose levels were significantly lower in fish on the diet with frass than fish on the diet without frass. Fish fed the highest dietary levels of frass (30%) had a significantly higher serum cholesterol level than fish on the control diet. Serum complement activity was significantly higher in fish on diets containing frass at levels of 10% and 20%. No significant differences were observed in other measure serum components including albumin, alkaline phosphatase, alanine aminotransferase, amylase, calcium, phosphorus, potassium, total protein, globulin, thyroxine and lysozyme activity. Even though overall mortality was low (0–17%), fish on the diets containing frass at levels 20% or more showed significantly higher survival than that of control fish or fish on lower levels of dietary frass. The use of frass in the catfish diet may prove beneficial by improving hematological parameters, and select serum immune effectors, and the overall resistance of juvenile channel catfish against F. covae infection.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"7 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135934868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discarded but Not Dismissed: A Comprehensive Study of the Feeding Habits of the Brown Comber (Serranus hepatus, (Linneaus 1758)) in the Gulf of Cádiz (NE Atlantic) 丢弃而不丢弃:Cádiz(东北大西洋)海湾褐梳(Serranus hepatus， (Linneaus 1758))食性的综合研究

3区农林科学

Fishes Pub Date : 2023-11-02 DOI: 10.3390/fishes8110541

Sara Madera-Santana, Carlos Rodríguez-García, Jairo Castro-Gutiérrez, Ángel Rafael Domínguez-Bustos, Remedios Cabrera-Castro

{"title":"Discarded but Not Dismissed: A Comprehensive Study of the Feeding Habits of the Brown Comber (Serranus hepatus, (Linneaus 1758)) in the Gulf of Cádiz (NE Atlantic)","authors":"Sara Madera-Santana, Carlos Rodríguez-García, Jairo Castro-Gutiérrez, Ángel Rafael Domínguez-Bustos, Remedios Cabrera-Castro","doi":"10.3390/fishes8110541","DOIUrl":"https://doi.org/10.3390/fishes8110541","url":null,"abstract":"The brown comber (Serranus hepatus) is a small benthopelagic species with no commercial value, primarily caught by bottom trawls as a by-catch. In this work, we studied the feeding habits of this species. For this purpose, samples were obtained from the trawl fleet within the different editions of the ECOFISH project carried out between 2019 and 2022. A total of 1534 individuals were analyzed. In the diet analysis, various factors were considered, such as the season, the depth, and the time of day of the capture, as well as the size range of the individuals caught. For the feeding analysis, different indexes were calculated, such as the vacuity index (%Vi) and index of relative importance (%IRI). The size range of the specimens was between 3.2–16.3 cm, and the weight was between 1.02–39.73 g. Of the stomach content analyzed, 49.7% of the stomachs were found to be empty. The resources with the greatest importance in the diet of the brown comber were from the crustacean group, especially mysidaceans and decapods. There were differences in the diet according to season, depth, and size; however, there was no variation in diet by the time of day.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"9 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135935079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The bZIP Transcription Factor Family Orchestrates the Molecular Response to Nitrite Stress in the Largemouth Bass Spleen bZIP转录因子家族调控大口黑鲈脾脏对亚硝酸盐胁迫的分子响应

3区农林科学

Fishes Pub Date : 2023-11-01 DOI: 10.3390/fishes8110540

Yan Sun, Yi Huang, Ying Wang, Yanqun Wang, Guiying Hao, Changwei Jiang, Zhiqiu Huang

{"title":"The bZIP Transcription Factor Family Orchestrates the Molecular Response to Nitrite Stress in the Largemouth Bass Spleen","authors":"Yan Sun, Yi Huang, Ying Wang, Yanqun Wang, Guiying Hao, Changwei Jiang, Zhiqiu Huang","doi":"10.3390/fishes8110540","DOIUrl":"https://doi.org/10.3390/fishes8110540","url":null,"abstract":"Nitrite toxicity poses a significant threat to aquatic organisms, including largemouth bass (LMB) and Micropterus salmoides. This study aimed to elucidate the role of bZIP transcription factors in mediating the molecular responses to nitrite stress in the LMB spleen. We identified 120 bZIP genes in the LMB genome using bioinformatics analysis and divided them into 11 subgroups based on phylogenetic relationships. Under nitrite stress, the bZIP_XI subgroup was upregulated, suggesting the activation of the stress response in the LMB spleen. Cellular pathway analysis revealed enrichment of pathways related to stress response, DNA repair, apoptosis, and autophagy. Co-expression network analysis highlighted bZIP_XI members such as msabZIP_49, msabZIP_12, msabZIP_39, and msabZIP_116 as potential key regulators. These transcription factors likely modulated the expression of stress-related genes like VCAM1, POLE3, and BMP1. Conserved binding motifs in the promoters of these genes may support regulation by bZIP_XI. Furthermore, bZIP_XI members correlated with immune cell infiltration in the spleen, potentially regulating immune-related genes like BCL2L1 and SELE. Homologs of bZIP_XI in other fish species exhibited similar expression patterns under stress. Overall, this study implicates the bZIP transcription factor family, notably the bZIP_XI subgroup, in orchestrating the molecular response of the LMB spleen to nitrite toxicity by regulating stress response pathways and immune function. These findings provide insights into nitrite stress adaptation in fish.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"43 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135221203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dietary Habits of Hardhead (Ariopsis felis) and Gafftopsail (Bagre marinus) Catfish Revealed through DNA Barcoding of Stomach Contents 通过胃内容物DNA条形码揭示硬头(Ariopsis felis)和加夫托帆(Bagre marinus)鲶鱼的饮食习惯

3区农林科学

Fishes Pub Date : 2023-10-31 DOI: 10.3390/fishes8110539

Ana R. Osowski, Matthew B. Jargowsky, Pearce T. Cooper, Sean P. Powers, J. Marcus Drymon

{"title":"Dietary Habits of Hardhead (Ariopsis felis) and Gafftopsail (Bagre marinus) Catfish Revealed through DNA Barcoding of Stomach Contents","authors":"Ana R. Osowski, Matthew B. Jargowsky, Pearce T. Cooper, Sean P. Powers, J. Marcus Drymon","doi":"10.3390/fishes8110539","DOIUrl":"https://doi.org/10.3390/fishes8110539","url":null,"abstract":"A better understanding of trophic interactions between hardhead catfish (Ariopsis felis) and gafftopsail catfish (Bagre marinus) is crucial for developing multi-species management strategies for the northern Gulf of Mexico (GOM). These two species are often aggregated in food web models; however, limited data are available to substantiate this approach. Therefore, the present study aimed to describe the dietary habits of hardhead catfish and gafftopsail catfish using analysis of stomach contents aided by DNA barcoding. Hardhead (n = 693) and gafftopsail (n = 655) catfish were sampled in the northern GOM from 2015–2019 using both fisheries-dependent and -independent techniques. The average percent number (%N), average percent mass (%M), prey specific number (%PN), prey specific mass (%PM), and prey-specific index of relative importance (%PSIRI) were computed to quantify prey species. The stomach content analysis identified distinct differences in diet between hardhead and gafftopsail catfish. Crustaceans were the most important prey for hardhead catfish, while gafftopsail catfish showed a significantly broader dietary breadth and were primarily piscivorous. Multivariate analyses indicated that the location of capture explained the greatest amount of diet variability for both species. These findings address fundamental knowledge gaps regarding the dietary habits of hardhead and gafftopsail catfish in northern GOM ecosystems.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"29 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution and Expansion of Alien Fish Species in the Karun River Basin, Iran 伊朗卡伦河流域外来鱼类的分布和扩展

3区农林科学

Fishes Pub Date : 2023-10-31 DOI: 10.3390/fishes8110538

Mojgan Zare Shahraki, Yazdan Keivany, Eisa Ebrahimi Dorche, Karen Blocksom, Andreas Bruder, Joseph Flotemersch, Doru Bănăduc

{"title":"Distribution and Expansion of Alien Fish Species in the Karun River Basin, Iran","authors":"Mojgan Zare Shahraki, Yazdan Keivany, Eisa Ebrahimi Dorche, Karen Blocksom, Andreas Bruder, Joseph Flotemersch, Doru Bănăduc","doi":"10.3390/fishes8110538","DOIUrl":"https://doi.org/10.3390/fishes8110538","url":null,"abstract":"We assessed the distribution of alien fishes in the Karun River Basin, Iran. Fish were collected from 39 sites during the November–December 2018 low-flow period. In total, 39 fish species from nine orders and 14 families were documented. Among these, 10 species were alien to the basin (986 individuals; 15.7%). Four species were the most abundant alien species and primarily in impounded, downstream reaches. Redundancy analysis (RDA) was conducted to identify the extent of changes in alien fish assemblages with environmental parameters. RDA1 and RDA2 accounted for 36.24% and 25.33% of the variation of alien species, respectively. Altitude, depth, electrical conductivity, water temperature, turbidity, dissolved oxygen, and river width were the most significant parameters affecting alien species distributions. We present a dual-pathway cause-and-effect hypothesis proposing that alien fish species presence causes declines in the ecological status of native fish communities. We then explore how human-induced aquatic ecosystem degradation creates opportunities for alien species to invade new ecosystems, further impacting native fish communities. Our study contributes insight into the cause and effect of the presence of alien fish species in the Karun River Basin and emphasizes the urgency of conservation measures to protect this critically endangered watershed.","PeriodicalId":12405,"journal":{"name":"Fishes","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fishes最新文献