Pub Date : 2021-03-01DOI: 10.22092/IJFS.2021.123818
M. Fallah, A. P. Zefrehei, A. Hedayati
Determining trophic condition of a wetland is an important step in scientific assessment of the aquatic ecosystem. High levels of nitrogen and phosphorus, is mainly the result of human activities in agriculture, industry, etc. Increasing levels of nutrients result in eutrophication of water ecosystems. Regarding the importance of Anzali international wetland, the present study conducted several models of Carlsons on trophic status of the wetland through 1985, 2007, 2014 and 2017. The evaluated stations include, Bandar Anzali under bridge, Sorkhankal, PirBazar, Siadarvishan, Nokhaleh, east of wetlands, Hendkhaleh, and west of wetland. The results of Analysis of Variance indicated significant difference (p <0.05) among values of the indicators listed in stations and different seasons. Assessment of trophy index (TSI) on total phosphorus (TP) and total nitrogen (TN) in order to reveal wetland condition determined oligotrophic and mesotrophic conditions in 1985 to acute hypertrophy in recent years. The results showed increase in the amounts of phosphorus and nitrogen during 1985 to 2017.
{"title":"Research Article: Evaluating limnological condition of Anzali international wetland during 32 years period using nutrient parameters and TSI indices","authors":"M. Fallah, A. P. Zefrehei, A. Hedayati","doi":"10.22092/IJFS.2021.123818","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123818","url":null,"abstract":"Determining trophic condition of a wetland is an important step in scientific assessment of the aquatic ecosystem. High levels of nitrogen and phosphorus, is mainly the result of human activities in agriculture, industry, etc. Increasing levels of nutrients result in eutrophication of water ecosystems. Regarding the importance of Anzali international wetland, the present study conducted several models of Carlsons on trophic status of the wetland through 1985, 2007, 2014 and 2017. The evaluated stations include, Bandar Anzali under bridge, Sorkhankal, PirBazar, Siadarvishan, Nokhaleh, east of wetlands, Hendkhaleh, and west of wetland. The results of Analysis of Variance indicated significant difference (p <0.05) among values of the indicators listed in stations and different seasons. Assessment of trophy index (TSI) on total phosphorus (TP) and total nitrogen (TN) in order to reveal wetland condition determined oligotrophic and mesotrophic conditions in 1985 to acute hypertrophy in recent years. The results showed increase in the amounts of phosphorus and nitrogen during 1985 to 2017.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"370-384"},"PeriodicalIF":0.9,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44004630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-02-14DOI: 10.22092/IJFS.2021.123478
Q. Dinh, N. Tran, D. D. Tran
Glossogobius aureus is an important commercial fish for food supply and has been caught increasingly, but data on its population biology is limited. The present study was carried out along coastlines from Soc Trang to Bac Lieu, southern Vietnam to contribute new information on the biological characteristics of G. aureus population. Data analysis of length-frequency distribution of 666 individuals showed that the equation of von Bertalanffy curve of this species was . The species displayed 4.47 y longevity and 2.75 in the growth performance. The length-converted catch curve analysis showed that the fishing, natural and total mortalities were 2.73 yr-1, 1.52 yr-1 and 4.25 yr-1 respectively and fish exploitation rate was 0.64. There was one recruitment peak in July and the analyses of relative yield-per-recruit and biomass-per-recruit gave Emax=0.408, E0.1=0.284 and E0.5=0.404. This goby is potentially an aquaculture species due to its high growth rate. The fish stock has been overfished, so the gill net mesh size should be increased and fish should not be caught during the recruitment period for sustainable management.
{"title":"Some biological parameters of Glossogobius aureus population from the Mekong Delta","authors":"Q. Dinh, N. Tran, D. D. Tran","doi":"10.22092/IJFS.2021.123478","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123478","url":null,"abstract":"Glossogobius aureus is an important commercial fish for food supply and has been caught increasingly, but data on its population biology is limited. The present study was carried out along coastlines from Soc Trang to Bac Lieu, southern Vietnam to contribute new information on the biological characteristics of G. aureus population. Data analysis of length-frequency distribution of 666 individuals showed that the equation of von Bertalanffy curve of this species was . The species displayed 4.47 y longevity and 2.75 in the growth performance. The length-converted catch curve analysis showed that the fishing, natural and total mortalities were 2.73 yr-1, 1.52 yr-1 and 4.25 yr-1 respectively and fish exploitation rate was 0.64. There was one recruitment peak in July and the analyses of relative yield-per-recruit and biomass-per-recruit gave Emax=0.408, E0.1=0.284 and E0.5=0.404. This goby is potentially an aquaculture species due to its high growth rate. The fish stock has been overfished, so the gill net mesh size should be increased and fish should not be caught during the recruitment period for sustainable management.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42385802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.350914.0
S. T. Jahromi, A. S. Othman, R. Rosazlina, S. Pourmozaffar, Mohsen Gozari
A population genetics study on Penaeus semisulcatus from Persian Gulf was performed to assist in the selection of suitable broodstocks for future breeding programs. Eight novel microsatellite loci were developed to study population genetics structure of P. semisulcatus in three population sites, Persian Gulf and Oman Sea (Jask, Hormoz and Kuhestak). There were incidences of heterozygosity deficiency and significant deviations from Hardy Weinberg equilibrium (HWE) at most loci (p<0.001). However, four loci (loci E2 and B9 – Hormoz; loci C6 – Kuhestak; and loci H9 – Jask) found to be in HWE. Micro-Checker analysis revealed null alleles in the three microsatellite loci (B5, C6 and C9). Pairwise Fst comparison based on allelic and genotypic frequencies indicated that the three populations were significantly differentiated from each other (p<0.05). High levels of pairwise Fst (0.106) and low levels of Nm (2.103) observed between Hormoz and Jask populations indicated restricted gene flow between the two populations. On the other hand, low levels of pairwise Fst (0.016) and high levels of Nm (15.876) observed between Hormoz and Kuhestak populations indicated high gene flow between these populations. In this study, the assignment test was examined in order to find gene flow connectivity between the three populations. Overall, results revealed high gene flow between Hormoz and Kuhestak and restricted genetic flow between Jask and both Hormoz and Kuhestak populations, providing new input for selection of genetically-suitable broodstocks.
{"title":"Research Article: Population genetics of Penaeus semisulcatus from Persian Gulf and Oman Sea using newly developed DNA microsatellite markers","authors":"S. T. Jahromi, A. S. Othman, R. Rosazlina, S. Pourmozaffar, Mohsen Gozari","doi":"10.22092/IJFS.2021.350914.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.350914.0","url":null,"abstract":"A population genetics study on Penaeus semisulcatus from Persian Gulf was performed to assist in the selection of suitable broodstocks for future breeding programs. Eight novel microsatellite loci were developed to study population genetics structure of P. semisulcatus in three population sites, Persian Gulf and Oman Sea (Jask, Hormoz and Kuhestak). There were incidences of heterozygosity deficiency and significant deviations from Hardy Weinberg equilibrium (HWE) at most loci (p<0.001). However, four loci (loci E2 and B9 – Hormoz; loci C6 – Kuhestak; and loci H9 – Jask) found to be in HWE. Micro-Checker analysis revealed null alleles in the three microsatellite loci (B5, C6 and C9). Pairwise Fst comparison based on allelic and genotypic frequencies indicated that the three populations were significantly differentiated from each other (p<0.05). High levels of pairwise Fst (0.106) and low levels of Nm (2.103) observed between Hormoz and Jask populations indicated restricted gene flow between the two populations. On the other hand, low levels of pairwise Fst (0.016) and high levels of Nm (15.876) observed between Hormoz and Kuhestak populations indicated high gene flow between these populations. In this study, the assignment test was examined in order to find gene flow connectivity between the three populations. Overall, results revealed high gene flow between Hormoz and Kuhestak and restricted genetic flow between Jask and both Hormoz and Kuhestak populations, providing new input for selection of genetically-suitable broodstocks.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"157-178"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46135735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123555
S. Sutharshiny, C. Shobana, K. Sivashanthini
The present study was carried out to determine freshness quality and remaining storage time of eclipse parrotfish and spangled emperor stored in ice on days 0, 2, 3, 5, 7, 9, 12, 15, 19 and 21 using selective methods. A score of 11-12 coincided with the level at which the fish were considered unacceptable by a sensory panel of six experienced assessors. The demerit score of eclipse parrotfish and spangled emperor increased linearly (R2=0.9563 and 0.9624, respectively) with storage time. The limit for acceptability of eclipse parrotfish and spangled emperor stored in ice was 9 and 19 days respectively. Total volatile base nitrogen value (45.87±1.10 mg/100g) for parrotfish stored in refrigerator exceeded limit of acceptability at the time of sensory rejection (9th day) while the value (5.93±0.28 mg/100 g) for spangled emperor was remained below the limit of acceptability after 9 days and increased to 54.96±1.80 mg/100g at the 19th day. The pH for both fishes showed significant (p <0.05) increases during the storage. Total viable count in spangled emperor analyzed were found to be below the acceptability limits (6 log10 cfu/g) by 15 days while maximum level of acceptability of eclipse parrotfish was until 7 days. Shelf-life of both fishes was different. Sensory score, value of TVB-N, pH and TVC provide evidence that the limit for acceptability was 7 days for eclipse parrotfish and 15 days for spangled emperor stored at 0 - 20C.
{"title":"Research Article: Determination of freshness quality changes using selective methods: A comparative study for eclipse parrotfish (Scarus russelii) and spangled emperor (Lethrinus nebulosus)","authors":"S. Sutharshiny, C. Shobana, K. Sivashanthini","doi":"10.22092/IJFS.2021.123555","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123555","url":null,"abstract":"The present study was carried out to determine freshness quality and remaining storage time of eclipse parrotfish and spangled emperor stored in ice on days 0, 2, 3, 5, 7, 9, 12, 15, 19 and 21 using selective methods. A score of 11-12 coincided with the level at which the fish were considered unacceptable by a sensory panel of six experienced assessors. The demerit score of eclipse parrotfish and spangled emperor increased linearly (R2=0.9563 and 0.9624, respectively) with storage time. The limit for acceptability of eclipse parrotfish and spangled emperor stored in ice was 9 and 19 days respectively. Total volatile base nitrogen value (45.87±1.10 mg/100g) for parrotfish stored in refrigerator exceeded limit of acceptability at the time of sensory rejection (9th day) while the value (5.93±0.28 mg/100 g) for spangled emperor was remained below the limit of acceptability after 9 days and increased to 54.96±1.80 mg/100g at the 19th day. The pH for both fishes showed significant (p <0.05) increases during the storage. Total viable count in spangled emperor analyzed were found to be below the acceptability limits (6 log10 cfu/g) by 15 days while maximum level of acceptability of eclipse parrotfish was until 7 days. Shelf-life of both fishes was different. Sensory score, value of TVB-N, pH and TVC provide evidence that the limit for acceptability was 7 days for eclipse parrotfish and 15 days for spangled emperor stored at 0 - 20C.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"243-253"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45319135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.350663.0
A. T. Mirghaed, M. Shojaei, S. A. T. Motlagh, M. M. Farahani, M. Weight
Length-weight and length-length relationships were estimated for eight species occurring in the Hara Biosphere Reserve in the Persian Gulf. Specimens were collected quarterly by block net and drift gillnet from June 2017 to July 2018. The b-values for length–weight relationships varied from 2.693 to 3.321. The study represents the first published information on LWRs for Hemiramphus archipelagicus (Collette & Parin, 1978), Lagocephalus guentheri (Miranda Ribeiro, 1915), and Triacanthus biaculeatus (Bloch, 1786) and first-time reports for FishBase. These species are ranked as rare in the sense that they have a restricted range.
{"title":"Short Communication: Length-weight and length-length relationships of eight fish species from Hara Biosphere Reserve; a mangrove swamp in the Persian Gulf","authors":"A. T. Mirghaed, M. Shojaei, S. A. T. Motlagh, M. M. Farahani, M. Weight","doi":"10.22092/IJFS.2021.350663.0","DOIUrl":"https://doi.org/10.22092/IJFS.2021.350663.0","url":null,"abstract":"Length-weight and length-length relationships were estimated for eight species occurring in the Hara Biosphere Reserve in the Persian Gulf. Specimens were collected quarterly by block net and drift gillnet from June 2017 to July 2018. The b-values for length–weight relationships varied from 2.693 to 3.321. The study represents the first published information on LWRs for Hemiramphus archipelagicus (Collette & Parin, 1978), Lagocephalus guentheri (Miranda Ribeiro, 1915), and Triacanthus biaculeatus (Bloch, 1786) and first-time reports for FishBase. These species are ranked as rare in the sense that they have a restricted range.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"292-297"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47848528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123545
M. Shahrani, G. A. Takami, M. Rohani, A. Motallebi, Yazdani Sadati
The economic losses due to fungal contamination in development of sturgeon and the side effects of malachite green in the environment are very important. Therefore, it is essential to investigate and introduce suitable natural substances instead of malachite green. The aim of this study was to compare antifungal effect of Thymus vulgaris with malachite green on fungi isolated from Siberian sturgeon eggs obtained from International Sturgeon Research Institute. The samples were inoculated in culture media (SDA) and Glucose-Peptone Agar at 25°C for 5-7 days and then isolated fungi were identified. The antifungal effect of T. vulgaris extract was evaluated by disc diffusion method and MIC and MFC of fungi was measured. In this study, Saprolegnia spp ., Fusarium spp ., Rhodotorula spp ., Penicillium spp ., Trichoderma spp ., Chrysosporium spp .and sterile hyphaewere isolated and identified from fertilized eggs of A. baerii. According to the results, T. vulgaris extract had a significant effect on all isolated fungal species. The most effective sample was observed on Saprolegnia and the least effective ones were Fusarium and Trichoderma. The MIC and MFC of alcoholic extract for Saprolegnia spp ., Fusarium spp., Rhodotorula spp ., Penicillium spp ., Trichoderma spp ., Chrysosporium spp ., sterile hyphae were ≥0.75, 3, 1.5, 1.5, 0.75, 1.5, ≤0.75 mg/ml, and ≥1.5, ≥3, 3, 3, 1.5, 3 and 1.5 mg/ml, respectively. Due to high frequency of Saprolegnia spp . in A. baerii eggs, and the significant effect of alcoholic extract of T. vulgaris, it could be used as a good alternative for malachite green to reduce the frequency of fungal contamination and its economic losses during reproductive seasons of A. baerii.
{"title":"Research Article: Antifungal effects of alcoholic extract of Thymus vulgaris on Siberian sturgeon (Acipenser baerii) eggs compared with malachite green effects","authors":"M. Shahrani, G. A. Takami, M. Rohani, A. Motallebi, Yazdani Sadati","doi":"10.22092/IJFS.2021.123545","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123545","url":null,"abstract":"The economic losses due to fungal contamination in development of sturgeon and the side effects of malachite green in the environment are very important. Therefore, it is essential to investigate and introduce suitable natural substances instead of malachite green. The aim of this study was to compare antifungal effect of Thymus vulgaris with malachite green on fungi isolated from Siberian sturgeon eggs obtained from International Sturgeon Research Institute. The samples were inoculated in culture media (SDA) and Glucose-Peptone Agar at 25°C for 5-7 days and then isolated fungi were identified. The antifungal effect of T. vulgaris extract was evaluated by disc diffusion method and MIC and MFC of fungi was measured. In this study, Saprolegnia spp ., Fusarium spp ., Rhodotorula spp ., Penicillium spp ., Trichoderma spp ., Chrysosporium spp .and sterile hyphaewere isolated and identified from fertilized eggs of A. baerii. According to the results, T. vulgaris extract had a significant effect on all isolated fungal species. The most effective sample was observed on Saprolegnia and the least effective ones were Fusarium and Trichoderma. The MIC and MFC of alcoholic extract for Saprolegnia spp ., Fusarium spp., Rhodotorula spp ., Penicillium spp ., Trichoderma spp ., Chrysosporium spp ., sterile hyphae were ≥0.75, 3, 1.5, 1.5, 0.75, 1.5, ≤0.75 mg/ml, and ≥1.5, ≥3, 3, 3, 1.5, 3 and 1.5 mg/ml, respectively. Due to high frequency of Saprolegnia spp . in A. baerii eggs, and the significant effect of alcoholic extract of T. vulgaris, it could be used as a good alternative for malachite green to reduce the frequency of fungal contamination and its economic losses during reproductive seasons of A. baerii.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"218-229"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46225760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123480
S. Masaeli, P. G. Mostafavi, H. H. Sahafi, S. T. Jahromi, A. Nabinejad, V. Noaman
Bivalvia is one of the least studied classes of the Persian Gulf. A survey and molecular analysis was conducted to determine bivalve species diversity in the Persian Gulf. To the best of our knowledge, this is the first report of barcoding data on bivalves of the Persian Gulf. We examined 40 individuals representing 8 species, 6 genera and 5 families. We collected samples from Hengam, Larak and Qeshm Islands and Bandar Lengeh in Persian Gulf, Iran. After DNA extraction, mitochondrial 16S ribosomal DNA (16SrDNA) and Cytochrome Oxidase subunit I were amplified by polymerase chain reaction (PCR). Based on obtained 16SrDNA and COI gene sequences and maximum parsimony, neighbor joining and maximum likelihood trees of these genes there was no overlap between maximum Kimura 2- parameter distance among conspecifics. Most species formed agglutinate sequence units with a small amount of changes. Eventually, comparison of the 8 selected studied species with metadata from India, Brazil, Japan, China, and America exposed that these species in Persian Gulf are classified in sister clades with high bootstraps except Pinctada. Since there is not much work on bivalves identification in the Persian Gulf, larger sampling and more research is needed to investigate mollusc diversity in this area.
{"title":"Research Article: Molecular phylogeny of bivalve families (Arcidae, Chamidae, Margaritidae, Ostreidae, Veneridae) in the Persian Gulf","authors":"S. Masaeli, P. G. Mostafavi, H. H. Sahafi, S. T. Jahromi, A. Nabinejad, V. Noaman","doi":"10.22092/IJFS.2021.123480","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123480","url":null,"abstract":"Bivalvia is one of the least studied classes of the Persian Gulf. A survey and molecular analysis was conducted to determine bivalve species diversity in the Persian Gulf. To the best of our knowledge, this is the first report of barcoding data on bivalves of the Persian Gulf. We examined 40 individuals representing 8 species, 6 genera and 5 families. We collected samples from Hengam, Larak and Qeshm Islands and Bandar Lengeh in Persian Gulf, Iran. After DNA extraction, mitochondrial 16S ribosomal DNA (16SrDNA) and Cytochrome Oxidase subunit I were amplified by polymerase chain reaction (PCR). Based on obtained 16SrDNA and COI gene sequences and maximum parsimony, neighbor joining and maximum likelihood trees of these genes there was no overlap between maximum Kimura 2- parameter distance among conspecifics. Most species formed agglutinate sequence units with a small amount of changes. Eventually, comparison of the 8 selected studied species with metadata from India, Brazil, Japan, China, and America exposed that these species in Persian Gulf are classified in sister clades with high bootstraps except Pinctada. Since there is not much work on bivalves identification in the Persian Gulf, larger sampling and more research is needed to investigate mollusc diversity in this area.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"96-108"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45628741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123458
N. Shahraki, M. Imanpour, P. Akbary, R. Safari, V. Jafari
This study was conducted to evaluate the effect of Zingiber officinale extract (ZE) on growth performance, antioxidant activity and resistance of shrimp (Litopenaeus vannamei) challenged with Photobacterium damselae bacteria. A total of 600 post larvae shrimps (initial weight, 1.06 ± 0.7 g) were randomly distributed into 12 fiberglass tanks representing four treatments at a rate of 50 shrimp in each tank. The control shrimp group (ZE0) was fed a ZE free basal diet. Other shrimp groups were fed the basal diet supplemented with 0.5 (ZE 0.5), 1.0 (ZE1) and 1.5 (ZE 1.5) g kg-1 diet. Diets were offered to shrimp at a feeding rate of 10% of live body weight for 8 weeks. After 8 week experimental trial 30 shrimp from each group was infected with LD70 bacteria P. damselae over 10 days to evaluated disease resistance of infected shrimp. Results revealed that growth performance (WG, SGR, FW and PER), the antioxidant activity (SOD, PO, GPx, CAT) and cumulative mortality percentage of the shrimp have significantly increased (p <0.05) in the ZE1 group compared with the other groups. Meanwhile, the lowest FCR and MDA value observed in shrimp fed ZE1 supplemented diet. It can be concluded that Z. officinale extract at 1g kg-1(ZE1) diet seems to be the most appropriate level for increasing growth performance antioxidant activity and disease resistance of L. vannamei
{"title":"Research Article: Dietary administration of aqueous Zingiber officinale extract on growth performance, antioxidant activity and resistance of shrimp Litopenaeus vannamei against Photobacterium damselae","authors":"N. Shahraki, M. Imanpour, P. Akbary, R. Safari, V. Jafari","doi":"10.22092/IJFS.2021.123458","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123458","url":null,"abstract":"This study was conducted to evaluate the effect of Zingiber officinale extract (ZE) on growth performance, antioxidant activity and resistance of shrimp (Litopenaeus vannamei) challenged with Photobacterium damselae bacteria. A total of 600 post larvae shrimps (initial weight, 1.06 ± 0.7 g) were randomly distributed into 12 fiberglass tanks representing four treatments at a rate of 50 shrimp in each tank. The control shrimp group (ZE0) was fed a ZE free basal diet. Other shrimp groups were fed the basal diet supplemented with 0.5 (ZE 0.5), 1.0 (ZE1) and 1.5 (ZE 1.5) g kg-1 diet. Diets were offered to shrimp at a feeding rate of 10% of live body weight for 8 weeks. After 8 week experimental trial 30 shrimp from each group was infected with LD70 bacteria P. damselae over 10 days to evaluated disease resistance of infected shrimp. Results revealed that growth performance (WG, SGR, FW and PER), the antioxidant activity (SOD, PO, GPx, CAT) and cumulative mortality percentage of the shrimp have significantly increased (p <0.05) in the ZE1 group compared with the other groups. Meanwhile, the lowest FCR and MDA value observed in shrimp fed ZE1 supplemented diet. It can be concluded that Z. officinale extract at 1g kg-1(ZE1) diet seems to be the most appropriate level for increasing growth performance antioxidant activity and disease resistance of L. vannamei","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"32-44"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43676660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123504
M. Fitria, S. Sukenda, M. Yuhana
Aeromonas hydrophila is an opportunistic pathogen causing high mortality and economic burden in freshwater fish farming. This study aims to develop a co-agglutination method for detecting and creating Aeromonas hydrophila diagnostic rapidly. In this study, we injected rabbits (±2kg weight) with 1mL of A. hydrophila antigen suspension 1.2 x 109cfu mL–1 at one week intervals (three times, intra vena) respectively. The gouramis (15.48±0.55g-1 weight) were infected by Aeromonas hydrophila, Aeromonas sobria, Aeromonas salmonicida, Streptococcus agalactiae, and Pseudomonas aeruginosa separately with 0.1 mL fish–1 and 108 cfu mL–1 bacterial cell suspensions. The antiserum was purified to couple with the Staphylococcus aureus suspension protein A, in a 1:1 (v/v) ratio and used by the co-agglutination reagent. We compared this method with standard polymerase chain reaction(PCR) for A. hydrophila detection. The rabbit antibody reaction occurred only against A. hydrophila antigen showing specificity of the gourami tissue supernatant within 10-30 seconds. The sensitivity test had a detection limit of 106 cfu mL–1. Comparison detection method with PCR showed that positive result of A. hydrophila was located in 209 bp. Co-agglutination method could detect A. hydrophila in the internal organ of fish at 12h after injection, but the PCR method could detect at one hour after injection. This research concluded that co-agglutination method could detect A. hydrophila specifically, sensitively, rapidly and practically in laboratory and field examination.
嗜水气单胞菌是一种在淡水养殖中造成高死亡率和经济负担的机会性病原体。本研究旨在开发一种快速检测和创建嗜水气单胞菌诊断的共凝集方法。在本研究中，我们分别每隔一周（三次，静脉内）给兔子（±2kg体重）注射1mL嗜水气单胞菌抗原悬浮液1.2 x 109cfu mL–1。用0.1 mL鱼-1和108 cfu mL-1的细菌细胞悬浮液分别感染钩虫（15.48±0.55g-1重量）。将抗血清纯化以与金黄色葡萄球菌悬浮蛋白A以1:1（v/v）的比例偶联，并通过共凝集试剂使用。我们将该方法与标准聚合酶链式反应（PCR）检测嗜水气单胞菌进行了比较。兔抗体反应仅针对嗜水气单胞菌抗原发生，在10-30秒内显示出钩藤组织上清液的特异性。灵敏度试验的检测限为106 cfu mL–1。结果表明，嗜水气单胞菌的阳性位点为209bp。共凝集法可在注射后12h检测到鱼内脏中的嗜水气单胞菌，而聚合酶链式反应法在注射后1h检测到。本研究表明，共凝集法能在实验室和现场检测中特异、灵敏、快速、实用地检测嗜水气单胞菌。
{"title":"Research Article: Development of a co-agglutination method for detection of Aeromonas hydrophila as causative agent of motile Aeromonas septicemia (MAS) disease in gourami (Osphronemus goramy)","authors":"M. Fitria, S. Sukenda, M. Yuhana","doi":"10.22092/IJFS.2021.123504","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123504","url":null,"abstract":"Aeromonas hydrophila is an opportunistic pathogen causing high mortality and economic burden in freshwater fish farming. This study aims to develop a co-agglutination method for detecting and creating Aeromonas hydrophila diagnostic rapidly. In this study, we injected rabbits (±2kg weight) with 1mL of A. hydrophila antigen suspension 1.2 x 109cfu mL–1 at one week intervals (three times, intra vena) respectively. The gouramis (15.48±0.55g-1 weight) were infected by Aeromonas hydrophila, Aeromonas sobria, Aeromonas salmonicida, Streptococcus agalactiae, and Pseudomonas aeruginosa separately with 0.1 mL fish–1 and 108 cfu mL–1 bacterial cell suspensions. The antiserum was purified to couple with the Staphylococcus aureus suspension protein A, in a 1:1 (v/v) ratio and used by the co-agglutination reagent. We compared this method with standard polymerase chain reaction(PCR) for A. hydrophila detection. The rabbit antibody reaction occurred only against A. hydrophila antigen showing specificity of the gourami tissue supernatant within 10-30 seconds. The sensitivity test had a detection limit of 106 cfu mL–1. Comparison detection method with PCR showed that positive result of A. hydrophila was located in 209 bp. Co-agglutination method could detect A. hydrophila in the internal organ of fish at 12h after injection, but the PCR method could detect at one hour after injection. This research concluded that co-agglutination method could detect A. hydrophila specifically, sensitively, rapidly and practically in laboratory and field examination.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"141-156"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41410281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-10DOI: 10.22092/IJFS.2021.123508
Sistani, A. Adeli, S. A. Mira
The present study is an attempt to analyze the value chain of tuna and tuna-like species. The study is intended to show the main loops of tuna and tuna-like species industry along with their relations. Also, the present study indicates the current map of value chain along with its problem tree for tuna and tuna-like species in Iran. According to test hypothesis, the status of tuna and tuna-like species value chain is not ideal in Iran. Weak market for various tuna products (lack of variety in the production of canned goods and the non-canned products), low rate of export to Iraq, Afghanistan and Central Asia (high cost, lack of competitiveness and non-flexibility of the rules and regulations for producing products with the preference of exporting countries) and the weakness in the export of the fresh tuna to Japan and the European Union for added value products (non-compliance with the target countries criteria and the weakness of the transport infrastructure, especially in the air transit) were identified as the main problems. Also, in the present study, the missing and weak factors which reduced the efficiency of the value chain were identified in forms of the problem trees and ranked by Friedman test. The results of this study showed that the value chain of tuna and tuna-like species suffer from the lack of fair distribution of profit between the value chain loops, no diversification in the production of value added products, neglecting the quality in the value chain and poor access to the export market of value added products.
{"title":"Research Article: A value chain analysis on tuna and tuna-like species in Iran","authors":"Sistani, A. Adeli, S. A. Mira","doi":"10.22092/IJFS.2021.123508","DOIUrl":"https://doi.org/10.22092/IJFS.2021.123508","url":null,"abstract":"The present study is an attempt to analyze the value chain of tuna and tuna-like species. The study is intended to show the main loops of tuna and tuna-like species industry along with their relations. Also, the present study indicates the current map of value chain along with its problem tree for tuna and tuna-like species in Iran. According to test hypothesis, the status of tuna and tuna-like species value chain is not ideal in Iran. Weak market for various tuna products (lack of variety in the production of canned goods and the non-canned products), low rate of export to Iraq, Afghanistan and Central Asia (high cost, lack of competitiveness and non-flexibility of the rules and regulations for producing products with the preference of exporting countries) and the weakness in the export of the fresh tuna to Japan and the European Union for added value products (non-compliance with the target countries criteria and the weakness of the transport infrastructure, especially in the air transit) were identified as the main problems. Also, in the present study, the missing and weak factors which reduced the efficiency of the value chain were identified in forms of the problem trees and ranked by Friedman test. The results of this study showed that the value chain of tuna and tuna-like species suffer from the lack of fair distribution of profit between the value chain loops, no diversification in the production of value added products, neglecting the quality in the value chain and poor access to the export market of value added products.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"20 1","pages":"195-208"},"PeriodicalIF":0.9,"publicationDate":"2021-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48184390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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