Pub Date : 2020-11-10DOI: 10.22092/IJFS.2020.122699
M. T. Namin, T. Valinassab, E. R. Fard, F. Ehteshami
In the present study, a trophic structure model for some fish species of the northern Oman Sea is developed through using mass balance modeling software, Ecopath with Ecosim (EwE). In this model, we simulated 16 functional groups spread across an area of 3998.20 km2 from 2017 to 2018. Mean trophic level in the area of the present study was 3.49. Values calculated for system omnivory and connectance indices were 0.42 and 0.44, respectively. However, the values of ecotrophic efficiency in the model were high (>0.5) for most consumers of high trophic levels except for sharks and rays because of their high fishing mortality. Accordingly, mixed trophic impact showed that phytoplankton and detritus positively impacted almost all ecological groups. Also bentho-pelagics, the medium demersals, benthos, and crustaceans had a very negative impact on themselves due to cannibalism. Furthermore, the highest realized trophic level was 4.34 for sharks. The maximum omnivory index is calculated as 0.99 for medium demersals for feeding on a wide variety of preys. Also, the average catch per net primary production, i.e., the gross efficiency of the system was around 0.000198 (lower than the global average) indicating that the fishery is harvesting fishes high in the food chain. The primary production/respiration (PP/R) ratio is found to be 3.57 and the values of ascendancy (45.40%) and overhead (54.60%) showed stability of the ecosystem. Thus northern Oman Sea can be classified as an immature ecosystem (in the developmental stage), although it has some kind of system maturity. Accordingly, the food web of northern Oman Sea is consisted mostly of detritivorous, planktivorous, and carnivorous fish species. Besides, Ecopath with Ecosim (EwE) software can be an excellent option to examine interactions among ecological groups, and the impact of fishing in northern Oman Sea which is unquestionably helpful to develop concrete management strategies. The proper ecosystem-based fisheries management practice can improve the efficiency of this overexploited ecosystem.
在本研究中，通过使用质量平衡建模软件Ecopath with Ecosim（EwE）开发了阿曼海北部一些鱼类的营养结构模型。在该模型中，我们模拟了2017年至2018年分布在3998.20平方公里区域的16个功能群。本研究区域的平均营养水平为3.49。系统杂食性指数和连通性指数的计算值分别为0.42和0.44。然而，对于除鲨鱼和鳐鱼外的大多数高营养水平消费者来说，模型中的生态营养效率值都很高（>0.5），因为它们的捕鱼死亡率很高。因此，混合营养影响表明，浮游植物和碎屑对几乎所有生态群都产生了积极影响。此外，底栖动物、中型底栖动物、底栖动物和甲壳类动物也因自相残杀而对自身产生了非常负面的影响。此外，鲨鱼的最高营养水平为4.34。以各种各样的猎物为食的中等减分，最大杂食指数计算为0.99。此外，初级生产净产量的平均渔获量，即系统的总效率约为0.000198（低于全球平均水平），表明渔业正在捕捞食物链中较高的鱼类。初级生产/呼吸（PP/R）比为3.57，优势值（45.40%）和头顶值（54.60%）显示了生态系统的稳定性。因此，阿曼海北部可以被归类为一个不成熟的生态系统（处于发育阶段），尽管它具有某种系统成熟度。因此，阿曼海北部的食物网主要由碎屑性、浮游性和肉食性鱼类组成。此外，使用Ecosim（EwE）软件的Ecopath可以很好地研究生态群体之间的相互作用，以及阿曼海北部捕鱼的影响，这无疑有助于制定具体的管理策略。以生态系统为基础的适当渔业管理做法可以提高这一过度开发生态系统的效率。
{"title":"Research Article: Trophic dynamics analysis and ecosystem structure for some fish species of northern Oman Sea","authors":"M. T. Namin, T. Valinassab, E. R. Fard, F. Ehteshami","doi":"10.22092/IJFS.2020.122699","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122699","url":null,"abstract":"In the present study, a trophic structure model for some fish species of the northern Oman Sea is developed through using mass balance modeling software, Ecopath with Ecosim (EwE). In this model, we simulated 16 functional groups spread across an area of 3998.20 km2 from 2017 to 2018. Mean trophic level in the area of the present study was 3.49. Values calculated for system omnivory and connectance indices were 0.42 and 0.44, respectively. However, the values of ecotrophic efficiency in the model were high (>0.5) for most consumers of high trophic levels except for sharks and rays because of their high fishing mortality. Accordingly, mixed trophic impact showed that phytoplankton and detritus positively impacted almost all ecological groups. Also bentho-pelagics, the medium demersals, benthos, and crustaceans had a very negative impact on themselves due to cannibalism. Furthermore, the highest realized trophic level was 4.34 for sharks. The maximum omnivory index is calculated as 0.99 for medium demersals for feeding on a wide variety of preys. Also, the average catch per net primary production, i.e., the gross efficiency of the system was around 0.000198 (lower than the global average) indicating that the fishery is harvesting fishes high in the food chain. The primary production/respiration (PP/R) ratio is found to be 3.57 and the values of ascendancy (45.40%) and overhead (54.60%) showed stability of the ecosystem. Thus northern Oman Sea can be classified as an immature ecosystem (in the developmental stage), although it has some kind of system maturity. Accordingly, the food web of northern Oman Sea is consisted mostly of detritivorous, planktivorous, and carnivorous fish species. Besides, Ecopath with Ecosim (EwE) software can be an excellent option to examine interactions among ecological groups, and the impact of fishing in northern Oman Sea which is unquestionably helpful to develop concrete management strategies. The proper ecosystem-based fisheries management practice can improve the efficiency of this overexploited ecosystem.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2804-2823"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46970678","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122747
S. Hashemi, M. Doustdar, A. Gholampour, M. Khanehzaei
In the present study, population characteristics of Thunnus albacares were evaluated by sampling at five fish landing sites in the northern Oman Sea including Beris, Ramin, Pozm, Konarak and Jask from March 2017 to March 2018. The biometric analysis was performed on more than twenty-six thousand fish. Population dynamic parameters were calculated including infinite length (L∞=171 cm), growth coefficient (K=0.54 (yr-1)), growth performance index (Ф'=4.19), natural mortality (M= 0.71(yr-1)), fishing mortality (F=1.57 (yr-1)), total mortality (Z=2.28±0.19 (yr-1)), exploitation coefficient (E=0.68 (yr-1)) and initial condition parameter (-0.18 yr-1). Relative production per recruitment, relative biomass per recruitment and exploitation rate of this species were Y'/ Rp = 0.04, B'/ Rp=0.23(yr-1) and U=0.62 (yr-1), respectively. The Pobj value is 0, and F/Fmsy>1. The results indicated that regarding length frequencies of this species in the northern part of the Oman Sea, yellowfin tuna stock has good conditions, but overfishing of this species is happening, now. Therefore, specific measures should be taken to reduce catch and fishing effort.
{"title":"Length-Based fishery status of Yellowfin tuna (Thunnus albacares Bonnaterre, 1788) in the northern waters of the Oman Sea","authors":"S. Hashemi, M. Doustdar, A. Gholampour, M. Khanehzaei","doi":"10.22092/IJFS.2020.122747","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122747","url":null,"abstract":"In the present study, population characteristics of Thunnus albacares were evaluated by sampling at five fish landing sites in the northern Oman Sea including Beris, Ramin, Pozm, Konarak and Jask from March 2017 to March 2018. The biometric analysis was performed on more than twenty-six thousand fish. Population dynamic parameters were calculated including infinite length (L∞=171 cm), growth coefficient (K=0.54 (yr-1)), growth performance index (Ф'=4.19), natural mortality (M= 0.71(yr-1)), fishing mortality (F=1.57 (yr-1)), total mortality (Z=2.28±0.19 (yr-1)), exploitation coefficient (E=0.68 (yr-1)) and initial condition parameter (-0.18 yr-1). Relative production per recruitment, relative biomass per recruitment and exploitation rate of this species were Y'/ Rp = 0.04, B'/ Rp=0.23(yr-1) and U=0.62 (yr-1), respectively. The Pobj value is 0, and F/Fmsy>1. The results indicated that regarding length frequencies of this species in the northern part of the Oman Sea, yellowfin tuna stock has good conditions, but overfishing of this species is happening, now. Therefore, specific measures should be taken to reduce catch and fishing effort.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2790-2803"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42400776","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122837
R. M. Nadushan, I. Hosseinzade
This study compared the biomass production, fucoxanthin production and antioxidant capacity of the fucoxanthin from the marine haptophyte algae, Isochrysis galbana under different nitrogen concentrations. At first step in the salinity test, I. galbana could grow in 20‰ and 35‰ but the 35‰ salinity was optimal. At second step, five different nitrogen concentrations (N-NO3) of 2, 4, 8, 12 12 mM, at the salinity of 35‰, were investigated. Algal cell density increased as nitrogen concentrations increased, but a low growth rate occurred in the culture with the highest nitrogen concentration (12 mM). The maximum cell density of 72× 12105"> and the maximum amount of fucoxanthin (18.1 mg g-1) was obtained in I. galbana cultured in media containing four mM nitrogen (N-NO3). The purified fucoxanthin exhibited strong antioxidant properties, with the effective concentration for 50% scavenging (EC50) of 1, 1-dihpenyl-2-picrylhydrazyl (DPPH) radical, being 0.2 mg/ml. This study suggests that the production and fucoxanthin concentration of I. galbana can be improved using nitrogen-replete culture in 35‰ salinity. Also under this condition this microalgaecan be a commercial source of fucoxanthin for human health and nutrition.
{"title":"Research Article: Optimization of production and antioxidant activity of fucoxanthin from marine haptophyte algae, Isochrysis galbana","authors":"R. M. Nadushan, I. Hosseinzade","doi":"10.22092/IJFS.2020.122837","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122837","url":null,"abstract":"This study compared the biomass production, fucoxanthin production and antioxidant capacity of the fucoxanthin from the marine haptophyte algae, Isochrysis galbana under different nitrogen concentrations. At first step in the salinity test, I. galbana could grow in 20‰ and 35‰ but the 35‰ salinity was optimal. At second step, five different nitrogen concentrations (N-NO3) of 2, 4, 8, 12 12 mM, at the salinity of 35‰, were investigated. Algal cell density increased as nitrogen concentrations increased, but a low growth rate occurred in the culture with the highest nitrogen concentration (12 mM). The maximum cell density of 72× 12105\"> and the maximum amount of fucoxanthin (18.1 mg g-1) was obtained in I. galbana cultured in media containing four mM nitrogen (N-NO3). The purified fucoxanthin exhibited strong antioxidant properties, with the effective concentration for 50% scavenging (EC50) of 1, 1-dihpenyl-2-picrylhydrazyl (DPPH) radical, being 0.2 mg/ml. This study suggests that the production and fucoxanthin concentration of I. galbana can be improved using nitrogen-replete culture in 35‰ salinity. Also under this condition this microalgaecan be a commercial source of fucoxanthin for human health and nutrition.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2901-2908"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42612473","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122836
M. Adel, H. R. Cholicheh, A. Gholamhosasoosiseini, A. B. Sadegh, M. Zorriehzahra
Anesthetic agents are used in fish to decrease stress and mortality during sorting, surgery, diagnosis and artificial fertilization procedure. This study was done to evaluate and compare the efficacy of propofol and clove oil for anesthetizing Capoeta damascina. For this purpose, 40 fish were caught from Arvand River and divided into two groups. After a pilot study, propofol and clove oil were examined in 12.5 mg/L and 125 mg/L concentrations, respectively. The onset of anesthesia, duration period of anesthesia and recovery time were recorded separately for each group and compared. Results showed that the anesthesia onset of specimens in propofol treatment, was significantly shorter than that of clove oil treatment (p <0.05). Also, recovery time in propofol treatment was longer (p <0.05) than that of clove oil. Based on the results, it was recommended to use propofol instead of clove oil in performing anesthesia for this species due to rapid induction, longer duration and more prolonged effect in immersion method.
{"title":"Research Article:A comparison between sedation using propofol and clove oil in Levantine scraper (Capoeta damascina)","authors":"M. Adel, H. R. Cholicheh, A. Gholamhosasoosiseini, A. B. Sadegh, M. Zorriehzahra","doi":"10.22092/IJFS.2020.122836","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122836","url":null,"abstract":"Anesthetic agents are used in fish to decrease stress and mortality during sorting, surgery, diagnosis and artificial fertilization procedure. This study was done to evaluate and compare the efficacy of propofol and clove oil for anesthetizing Capoeta damascina. For this purpose, 40 fish were caught from Arvand River and divided into two groups. After a pilot study, propofol and clove oil were examined in 12.5 mg/L and 125 mg/L concentrations, respectively. The onset of anesthesia, duration period of anesthesia and recovery time were recorded separately for each group and compared. Results showed that the anesthesia onset of specimens in propofol treatment, was significantly shorter than that of clove oil treatment (p <0.05). Also, recovery time in propofol treatment was longer (p <0.05) than that of clove oil. Based on the results, it was recommended to use propofol instead of clove oil in performing anesthesia for this species due to rapid induction, longer duration and more prolonged effect in immersion method.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2893-2900"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46357791","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 : 2020-11-10DOI: 10.22092/IJFS.2020.350889.0
Atefe Saadatkhah, H. Sobhanian, P. Zoufan, F. Amini, N. Soltani
Diatoms have been recognized as source of important and applicable ingredients such as pigments and essential lipids. In this study, the effects of nitrogen and silicate changes accomplished by salt stress were investigated to analysis the chl a and chl c1+c2 contents, specific growth rate, total lipid percentage and fatty acid composition of Navicula sp. Samples were collected using by plankton net (30-micron pores) in spring 2019, from 6 stations in the Persian Gulf, Iran. In this study, samples were cultured under salt stress (control, 20ppt and 45ppt) and nutrients fluctuation (control: N: 0.5 mg, Si:0.3 mg, high nutrient culture: N:0.9 mg, Si:4.5 mg and without nutrient culture). There was a considerable decrease in dry weight and maximum growth rate under 45ppt salt treatment without silicate. The amount of chl a was not significantly changed under various treatments. The highest level of chl c1+c2 was related to 20ppt with nitrate (3.05 mg L-1) and the lowest value was 0.38 mg L-1 for 20ppt with silicate treatment. The highest level of total lipid content was obtained at 45ppt without silicate. Lipid composition analysis under 45ppt without silicate showed a significant increase (2.07 times compared to control) of palmitoleic acid (C16:1n-7) and trace amounts of polyunsaturated fatty acids were detected. Based on these results, it could be suggested that salt stress without silicate has an important effect to accumulate valuable lipids in Navicula sp. so that, they could be useful in medical and bioenergy applications.
{"title":"Interaction of nitrogen and silicate fluctuations with salt stress on growth, and lipid production in Navicula sp.","authors":"Atefe Saadatkhah, H. Sobhanian, P. Zoufan, F. Amini, N. Soltani","doi":"10.22092/IJFS.2020.350889.0","DOIUrl":"https://doi.org/10.22092/IJFS.2020.350889.0","url":null,"abstract":"Diatoms have been recognized as source of important and applicable ingredients such as pigments and essential lipids. In this study, the effects of nitrogen and silicate changes accomplished by salt stress were investigated to analysis the chl a and chl c1+c2 contents, specific growth rate, total lipid percentage and fatty acid composition of Navicula sp. Samples were collected using by plankton net (30-micron pores) in spring 2019, from 6 stations in the Persian Gulf, Iran. In this study, samples were cultured under salt stress (control, 20ppt and 45ppt) and nutrients fluctuation (control: N: 0.5 mg, Si:0.3 mg, high nutrient culture: N:0.9 mg, Si:4.5 mg and without nutrient culture). There was a considerable decrease in dry weight and maximum growth rate under 45ppt salt treatment without silicate. The amount of chl a was not significantly changed under various treatments. The highest level of chl c1+c2 was related to 20ppt with nitrate (3.05 mg L-1) and the lowest value was 0.38 mg L-1 for 20ppt with silicate treatment. The highest level of total lipid content was obtained at 45ppt without silicate. Lipid composition analysis under 45ppt without silicate showed a significant increase (2.07 times compared to control) of palmitoleic acid (C16:1n-7) and trace amounts of polyunsaturated fatty acids were detected. Based on these results, it could be suggested that salt stress without silicate has an important effect to accumulate valuable lipids in Navicula sp. so that, they could be useful in medical and bioenergy applications.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"3310-3326"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41989739","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122739
F. Bano, A. Kashyap, M. Serajuddin
Effects of different dietary supplements of plant carotenoid sources on growth, coloration and behavioural activities of Trichogaster fasciata were carried out. Three groups of fish were fed with petal powder of rose (Rosa chinensis), China rose (Hibiscus rosasinensis) and marigold (Tagetes erecta) separately as carotenoid source along with the same basic ingredients for 90 days. The mean final weight of marigold petal powder fed group was significantly different (p <0.05) from other groups after 90 days of the experiment. The absolute growth rate, relative growth rate, weight gain percent and specific growth rate were highest in the group of fish fed with marigold petal powder while feed conversion ratio was lowest in this group. Carotenoid content in the tissue of different groups of the fish was found to be significantly different (p <0.0001). Marigold petal powder was most effective to enhance the pigmentation and coloration in the different color zones (color of eye and opercular ocellus, jugular darkening, anal, ventral and dorsal fin color etc.) of the skin of T. fasciata. Pigmentation affected the behavioural activities of the fish where male aggression and selection of males by females was high in the group fed with marigold petal powder. No significant difference was observed in the social interactions and habitat preference.
{"title":"Effects of different dietary supplementation of plant carotenoids on growth, coloration and behaviour of giant gourami, Trichogaster fasciata (Bloch and Schneider, 1801)","authors":"F. Bano, A. Kashyap, M. Serajuddin","doi":"10.22092/IJFS.2020.122739","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122739","url":null,"abstract":"Effects of different dietary supplements of plant carotenoid sources on growth, coloration and behavioural activities of Trichogaster fasciata were carried out. Three groups of fish were fed with petal powder of rose (Rosa chinensis), China rose (Hibiscus rosasinensis) and marigold (Tagetes erecta) separately as carotenoid source along with the same basic ingredients for 90 days. The mean final weight of marigold petal powder fed group was significantly different (p <0.05) from other groups after 90 days of the experiment. The absolute growth rate, relative growth rate, weight gain percent and specific growth rate were highest in the group of fish fed with marigold petal powder while feed conversion ratio was lowest in this group. Carotenoid content in the tissue of different groups of the fish was found to be significantly different (p <0.0001). Marigold petal powder was most effective to enhance the pigmentation and coloration in the different color zones (color of eye and opercular ocellus, jugular darkening, anal, ventral and dorsal fin color etc.) of the skin of T. fasciata. Pigmentation affected the behavioural activities of the fish where male aggression and selection of males by females was high in the group fed with marigold petal powder. No significant difference was observed in the social interactions and habitat preference.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2770-2789"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43895890","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122930
Z. Ramezani, Ebrahim Rajabzadeh Ghatarmi, S. F. Hosseini, J. Regenstein
Amino acid profiles, functionality, and antioxidative potential of orangefin ponyfish (Photopectoralis bindus)protein hydrolysates, using 1% alcalase, with diverse hydrolysis times (1, 2, 3 and 4 h), were evaluated. The samples solubility in the pH range of 3-9, emulsifying and foaming properties at various protein contents (2.5, 5 and 10 mg/mL), as well as the scavenging of DPPH, ABTS free radicals and reducing power (at concentrations of 1-5 mg/mL), were studied. The amino acid profile of orangefin ponyfish was used to estimate nutritional value. A high amount of essential amino acids (35%) involved in protein hydrolysates and Glx, Asx, and Gly were the dominant amino acids. Solubility was above 90% in the pH range 3-9 and increased at all hydrolysis times by changing the pH from acidic to alkaline (p<0.05). The emulsifying activity (EAI) and stability (ESI) indices were reduced with increasing hydrolysis; at 2.5 mg protein/mL, 1 h hydrolysates displayed the highest EAI (87±2 m2/g) and ESI (22±0.4 min), when considered with those possessing higher hydrolysis time. On the other hand, the foam expansion and stability increased with increasing hydrolysate content. Antioxidant activity of hydrolyzed protein increased with increased hydrolysis (up to 3 mg/mL), especially DPPH and ABTS. However, the highest DPPH and ABTS scavenging activity of FPH was about 73% and 93% at 5 mg/mL hydrolysate concentration and hydrolysis time 4 h, respectively.
{"title":"Functional properties and antioxidant activities of protein hydrolysates from orangefin ponyfish (Photopectoralis bindus)","authors":"Z. Ramezani, Ebrahim Rajabzadeh Ghatarmi, S. F. Hosseini, J. Regenstein","doi":"10.22092/IJFS.2020.122930","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122930","url":null,"abstract":"Amino acid profiles, functionality, and antioxidative potential of orangefin ponyfish (Photopectoralis bindus)protein hydrolysates, using 1% alcalase, with diverse hydrolysis times (1, 2, 3 and 4 h), were evaluated. The samples solubility in the pH range of 3-9, emulsifying and foaming properties at various protein contents (2.5, 5 and 10 mg/mL), as well as the scavenging of DPPH, ABTS free radicals and reducing power (at concentrations of 1-5 mg/mL), were studied. The amino acid profile of orangefin ponyfish was used to estimate nutritional value. A high amount of essential amino acids (35%) involved in protein hydrolysates and Glx, Asx, and Gly were the dominant amino acids. Solubility was above 90% in the pH range 3-9 and increased at all hydrolysis times by changing the pH from acidic to alkaline (p<0.05). The emulsifying activity (EAI) and stability (ESI) indices were reduced with increasing hydrolysis; at 2.5 mg protein/mL, 1 h hydrolysates displayed the highest EAI (87±2 m2/g) and ESI (22±0.4 min), when considered with those possessing higher hydrolysis time. On the other hand, the foam expansion and stability increased with increasing hydrolysate content. Antioxidant activity of hydrolyzed protein increased with increased hydrolysis (up to 3 mg/mL), especially DPPH and ABTS. However, the highest DPPH and ABTS scavenging activity of FPH was about 73% and 93% at 5 mg/mL hydrolysate concentration and hydrolysis time 4 h, respectively.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"3001-3017"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48960224","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122770
S.M.A. Ebnetorab, H. Ahari, S. Kakoolaki
Our study was focused on characterization of dominantBacillus bacteria isolated from the digestive tract of Oncorhynchus mykiss. After 8 weeks, the fish fed with probiotic-free diet were dissected under strictly controlled conditions. Fish intestines were eviscerated and its content diluted to 10−4 using Ringer solution. Two isolated bacteria were Gram-positive, catalase-positive, and oxidase-negative, based on the biochemical tests. A mixed of the two strains was the most efficient isolates determined inO. mykiss. Molecular characterization using PCR-Ribotyping was carried out using sequencing the 16S rRNA gene of both strains, which isolated two bacteria, Bacillus subtilis Ahari.H1 and B. licheniformis Ahari. H2. The isolated bacteria could tolerate 0.3% bile salt and non-hemolytic in nature. They also showed resistance to pH at 2.5 and 4 for acid test and 2.3 and 7 for gastric juice, pepsin and trypsin. It is concluded that the efficiency of the isolated probiotics can be candidates as probiotic in fish culture. It was unveiled that these strains can successfully diminish Aeromonas hydrophila pathogenicity in rainbow trout.
{"title":"Isolation, biochemical and molecular detection of Bacillus subtilis and Bacillus licheniformis from the digestive system of rainbow trout (Oncorhynchus mykiss) and its inhibitory effect on Aeromonas hydrophila.","authors":"S.M.A. Ebnetorab, H. Ahari, S. Kakoolaki","doi":"10.22092/IJFS.2020.122770","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122770","url":null,"abstract":"Our study was focused on characterization of dominantBacillus bacteria isolated from the digestive tract of Oncorhynchus mykiss. After 8 weeks, the fish fed with probiotic-free diet were dissected under strictly controlled conditions. Fish intestines were eviscerated and its content diluted to 10−4 using Ringer solution. Two isolated bacteria were Gram-positive, catalase-positive, and oxidase-negative, based on the biochemical tests. A mixed of the two strains was the most efficient isolates determined inO. mykiss. Molecular characterization using PCR-Ribotyping was carried out using sequencing the 16S rRNA gene of both strains, which isolated two bacteria, Bacillus subtilis Ahari.H1 and B. licheniformis Ahari. H2. The isolated bacteria could tolerate 0.3% bile salt and non-hemolytic in nature. They also showed resistance to pH at 2.5 and 4 for acid test and 2.3 and 7 for gastric juice, pepsin and trypsin. It is concluded that the efficiency of the isolated probiotics can be candidates as probiotic in fish culture. It was unveiled that these strains can successfully diminish Aeromonas hydrophila pathogenicity in rainbow trout.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2824-2845"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43720761","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 : 2020-11-10DOI: 10.22092/IJFS.2020.122798
M. Golshan, A. Hatef, H. Habibi, S. M. Alavi
Bisphenol A (BPA) is a synthetic compound widely used in types of consumer goods and medical tools. It has been shown that BPA acts as an endocrine disruptor chemical casuing negative impact on reproductive functions. The present study used an in vitro approach to assess estrogenic transcriptional activity of BPA as a rapid and sensitive method. The cultured pieces of hepatic tissue of goldfish (Carassius auratus) were exposed to 1, 5, 25 μg/L BPA and 1 µg/L E2 for comparison over 24 h. Compared to control, the mRNA transcript of erβ-I showed a significant increase in the hepatic tissues exposed to all doses of BPA and E2. The mRNA transcript of erβ-II was signifincantly increased in hepatic tissues exposed to 1 and 5 μg/L BPA and E2. The mRNA transcripts of vtg in the hepatic tissues treated with 5 μg/L BPA and E2 were also increased, significantly. Finally, cyp1a mRNA transcript showed a significant increase in the hepatic tissues exposed to 5 and 25 μg/L BPA and E2. These results show an estrogenic activity of BPA similar to E2, and suggest that in vitro approach can be used as an alternative to in vivo test to detect estrogenic effects of BPA.
{"title":"Research Article: A rapid approach to assess estrogenic transcriptional activity of bisphenol A in the liver of goldfish","authors":"M. Golshan, A. Hatef, H. Habibi, S. M. Alavi","doi":"10.22092/IJFS.2020.122798","DOIUrl":"https://doi.org/10.22092/IJFS.2020.122798","url":null,"abstract":"Bisphenol A (BPA) is a synthetic compound widely used in types of consumer goods and medical tools. It has been shown that BPA acts as an endocrine disruptor chemical casuing negative impact on reproductive functions. The present study used an in vitro approach to assess estrogenic transcriptional activity of BPA as a rapid and sensitive method. The cultured pieces of hepatic tissue of goldfish (Carassius auratus) were exposed to 1, 5, 25 μg/L BPA and 1 µg/L E2 for comparison over 24 h. Compared to control, the mRNA transcript of erβ-I showed a significant increase in the hepatic tissues exposed to all doses of BPA and E2. The mRNA transcript of erβ-II was signifincantly increased in hepatic tissues exposed to 1 and 5 μg/L BPA and E2. The mRNA transcripts of vtg in the hepatic tissues treated with 5 μg/L BPA and E2 were also increased, significantly. Finally, cyp1a mRNA transcript showed a significant increase in the hepatic tissues exposed to 5 and 25 μg/L BPA and E2. These results show an estrogenic activity of BPA similar to E2, and suggest that in vitro approach can be used as an alternative to in vivo test to detect estrogenic effects of BPA.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"2877-2892"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47551896","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 : 2020-11-10DOI: 10.22092/IJFS.2020.123007
N. Aydoğdu, A. Avenant‐Oldewage, Q. M. D. Santos, A. Aydoğdu
In this study, the occurrence of a parasitic helminth infecting a Turkish endemic fish, Manyas spirlin, Alburnoides manyasensis from the Nilüfer stream, Bursa, was studied from winter 2017 to autumn 2018. A total of 46 A. manyasensis were examined for the presence of the helminth. The helminth was identified as Paradiplozoon homoion (Monogenea: Diplozoidae) and occurred on the gills of host fish. A total of 115 specimens of P . homoion infected 32 of 46 fish examined, with prevalence and mean intensity of infection of 69.57% (41.67% in Summer to 90.00% in Winter) and 3.59 (1.00 in Summer to 6.22 in Winter) respectively. Additionally, prevalence and mean intensity of infection was calculated per seasons, host size and sex. The highest values for prevalence and intensity of infection were found in winter for P . homoion . To our knowledge, this is the first ichthyoparasitological study for A. manyasensis in Turkey. This is also the first record of P . homoion from this host fish and locality.
{"title":"Prevalence and intensity of Paradiplozoon homoion (Monogenea: Diplozoidae) from Manyas spirlin, Alburnoides manyasensis, an endemic fish of Turkey: new host and geographical record.","authors":"N. Aydoğdu, A. Avenant‐Oldewage, Q. M. D. Santos, A. Aydoğdu","doi":"10.22092/IJFS.2020.123007","DOIUrl":"https://doi.org/10.22092/IJFS.2020.123007","url":null,"abstract":"In this study, the occurrence of a parasitic helminth infecting a Turkish endemic fish, Manyas spirlin, Alburnoides manyasensis from the Nilüfer stream, Bursa, was studied from winter 2017 to autumn 2018. A total of 46 A. manyasensis were examined for the presence of the helminth. The helminth was identified as Paradiplozoon homoion (Monogenea: Diplozoidae) and occurred on the gills of host fish. A total of 115 specimens of P . homoion infected 32 of 46 fish examined, with prevalence and mean intensity of infection of 69.57% (41.67% in Summer to 90.00% in Winter) and 3.59 (1.00 in Summer to 6.22 in Winter) respectively. Additionally, prevalence and mean intensity of infection was calculated per seasons, host size and sex. The highest values for prevalence and intensity of infection were found in winter for P . homoion . To our knowledge, this is the first ichthyoparasitological study for A. manyasensis in Turkey. This is also the first record of P . homoion from this host fish and locality.","PeriodicalId":14569,"journal":{"name":"Iranian Journal of Fisheries Sciences","volume":"19 1","pages":"3301-3309"},"PeriodicalIF":0.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47981616","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：