Pub Date : 2020-09-01DOI: 10.22034/IAR(20).2020.1898824.1048
M. Gammone, N. D’Orazio
The sea is an untapped and unexploited wide ecosystem, which results to be extremely rich in diverse species: marine organisms are a source of many compounds and substances with numerous biological activities. Important marine biologically active molecules are, among others, macrolides, which could become the source of new and effective medicaments and therapeutics, due to their potential anti-inflammatory, antimicrobial (not only antibacterial and antifungal, but also antiprotozoal and antiviral), antioxidant, immunomodulant and antitumor capacities. Aim of this review is to examine the biological activities and the potential clinical and pharmaceutical applications of these interesting and fascinating novel marine bioactive compounds.
{"title":"Potential applications of marine macrolides: New drugs from the sea?","authors":"M. Gammone, N. D’Orazio","doi":"10.22034/IAR(20).2020.1898824.1048","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1898824.1048","url":null,"abstract":"The sea is an untapped and unexploited wide ecosystem, which results to be extremely rich in diverse species: marine organisms are a source of many compounds and substances with numerous biological activities. Important marine biologically active molecules are, among others, macrolides, which could become the source of new and effective medicaments and therapeutics, due to their potential anti-inflammatory, antimicrobial (not only antibacterial and antifungal, but also antiprotozoal and antiviral), antioxidant, immunomodulant and antitumor capacities. Aim of this review is to examine the biological activities and the potential clinical and pharmaceutical applications of these interesting and fascinating novel marine bioactive compounds.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48645106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.22034/IAR.2020.1900150.1053
F. Nur, Agung Setia Batubara, K. Eriani, U. Tang, A. Abdullah, Muhammadar, M. N. Siti-Azizah, M. Wilkes, N. Fadli, S. Rizal, A. Zainal, Muchlisin
Water temperature is a limiting factor in fish health and plays a crucial role, especially in endemic species that are more sensitive to ambient temperature changes. The objective of the present study was to examine the effects of temperature on growth patterns, survival, blood glucose, gill histology, and erythrocyte cell abnormality of Betta rubra, an endemic species in Aceh and Northern Sumatra, Indonesia. The fish sample was collected from Nagan Raya, Aceh Province, Indonesia. The fish were acclimatized for three days prior to experimental trials at five temperature levels; 24 °C, 26 °C, 28 °C, 30 °C and 32 °C for 14 days. Fish were taken randomly from every treatment to measure blood glucose levels and gill samples were taken at the start and end of the experiment. The results showed the highest survival at a temperature of 28 °C (83.33%). The lowest blood glucose level was also found at a temperature of 28 °C. In addition, an increase and decrease in temperature exceeding 28 °C caused gill damage. Higher temperatures caused an increase in the abnormality of erythrocyte cells, with the highest percentage of abnormality found at 32 °C. Overall, this study confirmed that exposure to lower and higher temperature than the optimal is stressful to B. rubra.
{"title":"Effect of water temperature on the physiological responses in Betta rubra, Perugia 1893 (Pisces: Osphronemidae)","authors":"F. Nur, Agung Setia Batubara, K. Eriani, U. Tang, A. Abdullah, Muhammadar, M. N. Siti-Azizah, M. Wilkes, N. Fadli, S. Rizal, A. Zainal, Muchlisin","doi":"10.22034/IAR.2020.1900150.1053","DOIUrl":"https://doi.org/10.22034/IAR.2020.1900150.1053","url":null,"abstract":"Water temperature is a limiting factor in fish health and plays a crucial role, especially in endemic species that are more sensitive to ambient temperature changes. The objective of the present study was to examine the effects of temperature on growth patterns, survival, blood glucose, gill histology, and erythrocyte cell abnormality of Betta rubra, an endemic species in Aceh and Northern Sumatra, Indonesia. The fish sample was collected from Nagan Raya, Aceh Province, Indonesia. The fish were acclimatized for three days prior to experimental trials at five temperature levels; 24 °C, 26 °C, 28 °C, 30 °C and 32 °C for 14 days. Fish were taken randomly from every treatment to measure blood glucose levels and gill samples were taken at the start and end of the experiment. The results showed the highest survival at a temperature of 28 °C (83.33%). The lowest blood glucose level was also found at a temperature of 28 °C. In addition, an increase and decrease in temperature exceeding 28 °C caused gill damage. Higher temperatures caused an increase in the abnormality of erythrocyte cells, with the highest percentage of abnormality found at 32 °C. Overall, this study confirmed that exposure to lower and higher temperature than the optimal is stressful to B. rubra.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45589964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.22034/IAR.2020.1896027.1027
Mouna El Qendouci, K. Amenzoui, A. Yahyaoui
This study was conducted in order to investigate reproductive parameters of anchovy Engraulis encrasicolus (Linnaeus, 1758) in the central area of the Moroccan Atlantic coast, from January to December 2016. The data analysis based on a total of 1633 collected fish suggest that 850 and 783 were females and males respectively with an average male sex-ratio of 46.51% (χ2= 2.74; P > 0.05). The Gonado-somatic index (GSI) indicated that spawning activity occurred from April to November exhibiting the highest value between June and August. The size at first sexual maturity was approximately the same for both sexes and corresponds to 10.5 cm. The fecundity estimated varied from 7323 to 21230 and was positively correlated to the fish length and weight. This study was necessary to fill the knowledge gap and provide information for the management and conservation of the investigated species in this area.
{"title":"Size at maturity, fecundity and spawning period of anchovy Engraulis encrasicolus (Linnaeus, 1758) in the central area of the Moroccan Atlantic coast","authors":"Mouna El Qendouci, K. Amenzoui, A. Yahyaoui","doi":"10.22034/IAR.2020.1896027.1027","DOIUrl":"https://doi.org/10.22034/IAR.2020.1896027.1027","url":null,"abstract":"This study was conducted in order to investigate reproductive parameters of anchovy Engraulis encrasicolus (Linnaeus, 1758) in the central area of the Moroccan Atlantic coast, from January to December 2016. The data analysis based on a total of 1633 collected fish suggest that 850 and 783 were females and males respectively with an average male sex-ratio of 46.51% (χ2= 2.74; P > 0.05). The Gonado-somatic index (GSI) indicated that spawning activity occurred from April to November exhibiting the highest value between June and August. The size at first sexual maturity was approximately the same for both sexes and corresponds to 10.5 cm. The fecundity estimated varied from 7323 to 21230 and was positively correlated to the fish length and weight. This study was necessary to fill the knowledge gap and provide information for the management and conservation of the investigated species in this area.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45307202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1894161.1017
R. Y. Fujimoto, G. S. Gomes, R. Sakabe, C. Cruz, N. D. C. Sousa, M. Couto, P. Paixão, J. O. Meneses, P. Carneiro, A. N. Maria
The knowledge of fish mineral requirements, such as selenium, is important to promote the growth and health status for fish in captivity, but excess or deficiency must be avoided. Therefore, this study evaluated the growth performance, hematology and the parasite load of Nile tilapia (Oreochromis niloticus) supplemented with organic selenium (0.0; 0.25; 0.5; 1.0 and 1.5 mg/Kg). The increased levels of selenium did not affect significantly (p<0.05) the growth performance of tilapia. However, the increases of thrombocytes and parasite load are proportional to the increases of selenium levels. Unlike expected, supplemented diets with selenium did not benefit growth performance and supplementation of 1.5 mg/kg caused deleterious effects on the health of tilapia.
{"title":"Effects of organic selenium on thrombocytes and parasite infestation in nile tilapia juveniles","authors":"R. Y. Fujimoto, G. S. Gomes, R. Sakabe, C. Cruz, N. D. C. Sousa, M. Couto, P. Paixão, J. O. Meneses, P. Carneiro, A. N. Maria","doi":"10.22034/IAR(20).2020.1894161.1017","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1894161.1017","url":null,"abstract":"The knowledge of fish mineral requirements, such as selenium, is important to promote the growth and health status for fish in captivity, but excess or deficiency must be avoided. Therefore, this study evaluated the growth performance, hematology and the parasite load of Nile tilapia (Oreochromis niloticus) supplemented with organic selenium (0.0; 0.25; 0.5; 1.0 and 1.5 mg/Kg). The increased levels of selenium did not affect significantly (p<0.05) the growth performance of tilapia. However, the increases of thrombocytes and parasite load are proportional to the increases of selenium levels. Unlike expected, supplemented diets with selenium did not benefit growth performance and supplementation of 1.5 mg/kg caused deleterious effects on the health of tilapia.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"127-132"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45797136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1892203.1006
Pavan Kumar Dara, K. Elavarasan, B. Shamasundar
In this study, antioxidant and surface-active properties of gelatin hydrolysates (GH) were evaluated. Gelatin obtained from croaker fish (Johnius dussumieri) skin was hydrolysed by the application of visceral proteases extracted from gastrointestinal (GI) tract of two freshwater fish species rohu (Labeo rohita)and catla (Catla catla). The resultant GH was designated as ‘gelatin hydrolysate-rohu protease’ (GH-RP) and ‘gelatin hydrolysate-catla protease’ (GH-CP). Surface-active properties (foaming and emulsion) of GH-RP were significantly higher than GH-CP at concentrations studied (P 10 kDa, 5-10 kDa, 3-5 kDa, 1-3 kDa and 50 value of DPPH radical scavenging activity of fraction 1-3 kDa from GH-RP and fraction
{"title":"Characterization of antioxidant and surface active properties of gelatin hydrolysates obtained from croaker fish skin","authors":"Pavan Kumar Dara, K. Elavarasan, B. Shamasundar","doi":"10.22034/IAR(20).2020.1892203.1006","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1892203.1006","url":null,"abstract":"In this study, antioxidant and surface-active properties of gelatin hydrolysates (GH) were evaluated. Gelatin obtained from croaker fish (Johnius dussumieri) skin was hydrolysed by the application of visceral proteases extracted from gastrointestinal (GI) tract of two freshwater fish species rohu (Labeo rohita)and catla (Catla catla). The resultant GH was designated as ‘gelatin hydrolysate-rohu protease’ (GH-RP) and ‘gelatin hydrolysate-catla protease’ (GH-CP). Surface-active properties (foaming and emulsion) of GH-RP were significantly higher than GH-CP at concentrations studied (P 10 kDa, 5-10 kDa, 3-5 kDa, 1-3 kDa and 50 value of DPPH radical scavenging activity of fraction 1-3 kDa from GH-RP and fraction","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"116-126"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43540265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1894262.1018
S. Katayama, Masayuki Yamamoto, T. Munroe
In this study, we examined the seasonal reproductive traits and inter-sex differences in the gonadosomatic index (GSI) of four Soleidae fish species in Japan to gain insights into the life history traits of Soleoidei fishes. We found that the sex ratio of one of these species was significantly skewed toward females, whereas the other three species showed no significant differences in the frequencies of males and females. For all species, the GSI values for mature males were between 0.5 and 1.5, which were notably lower than those of mature females (GSI: 7-15), and the weight of testes was approximately 10% that of female ovaries, after normalizing for body weight. The lower GSI values of male Soleidae fish may be indicative of an effective energy allocation mechanism within populations.
{"title":"Comparison of the reproductive traits of male and female Soleoidei fishes in Japan","authors":"S. Katayama, Masayuki Yamamoto, T. Munroe","doi":"10.22034/IAR(20).2020.1894262.1018","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1894262.1018","url":null,"abstract":"In this study, we examined the seasonal reproductive traits and inter-sex differences in the gonadosomatic index (GSI) of four Soleidae fish species in Japan to gain insights into the life history traits of Soleoidei fishes. We found that the sex ratio of one of these species was significantly skewed toward females, whereas the other three species showed no significant differences in the frequencies of males and females. For all species, the GSI values for mature males were between 0.5 and 1.5, which were notably lower than those of mature females (GSI: 7-15), and the weight of testes was approximately 10% that of female ovaries, after normalizing for body weight. The lower GSI values of male Soleidae fish may be indicative of an effective energy allocation mechanism within populations.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"146-150"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48204752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1897659.1037
R. B. Setubal, Rodrigo Araújo Do Nascimento, R. Bozelli
Since zooplankton is the main route of biomass transfer between producers and consumers, zooplankton secondary production is an important measure to evaluate the flow of matter through the trophic levels in aquatic food chains. Secondary production measures may be employed to characterize the zooplankton functional role and to assess the impacts on ecosystem processes and services. The objectives of this study were: 1- to review the main methods to quantify zooplankton secondary production and 2- to carry out a survey of the studies made in Brazil, identifying their gaps, potentialities and perspectives. We conducted a search of all publications using secondary production measures in Brazilian aquatic environments in different databases ("Web of Science", "Scopus" and "Scielo"). We found that secondary production measures are based on three main approaches: physiological, enzymatic and population dynamics. The main measures of zooplankton secondary production used in freshwater environments are based on recruitment and biomass increase methods while in transitional and marine environments predominate measures based on growth rate. We found 60 publications among scientific articles, thesis and book chapters developed in Brazil. The studies on zooplankton secondary production have grown in recent years, however most publications were carried out in the southeast region, especially in reservoirs with descriptive approaches. Since there is still a lack of basic information on tropical species and environments, it is important to develop new studies focusing on more complex issues, such as aquatic ecosystems functioning, the effects of environmental changes and anthropic impacts on ecosystem processes and the aquatic environments contribution to biogeochemical global cycles.
由于浮游动物是生物量在生产者和消费者之间转移的主要途径，因此浮游动物次生产量是评价水生食物链中营养级物质流动的重要指标。二级生产措施可用于描述浮游动物的功能作用和评估对生态系统过程和服务的影响。本研究的目的是:1-回顾量化浮游动物次生产量的主要方法;2-对巴西所做的研究进行调查，确定其差距、潜力和前景。我们在不同的数据库(“Web of Science”、“Scopus”和“Scielo”)中搜索了所有在巴西水生环境中使用二次生产措施的出版物。我们发现次生生产措施主要基于三种方法:生理、酶和种群动态。淡水环境中浮游动物次生产量的主要测量方法是以补充和生物量增加法为基础的，而过渡环境和海洋环境中浮游动物次生产量的主要测量方法是以生长速率为基础的。我们在巴西发表的科学论文、论文和书籍章节中发现了60种出版物。近年来，关于浮游动物次生生产的研究越来越多，但大多数出版物是在东南地区进行的，特别是在水库中采用描述性方法。由于缺乏关于热带物种和环境的基本信息，因此有必要开展新的研究，重点关注更复杂的问题，如水生生态系统功能、环境变化和人类对生态系统过程的影响以及水生环境对生物地球化学全球循环的贡献。
{"title":"Zooplankton secondary production: main methods, overview and perspectives from Brazilian studies","authors":"R. B. Setubal, Rodrigo Araújo Do Nascimento, R. Bozelli","doi":"10.22034/IAR(20).2020.1897659.1037","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1897659.1037","url":null,"abstract":"Since zooplankton is the main route of biomass transfer between producers and consumers, zooplankton secondary production is an important measure to evaluate the flow of matter through the trophic levels in aquatic food chains. Secondary production measures may be employed to characterize the zooplankton functional role and to assess the impacts on ecosystem processes and services. The objectives of this study were: 1- to review the main methods to quantify zooplankton secondary production and 2- to carry out a survey of the studies made in Brazil, identifying their gaps, potentialities and perspectives. We conducted a search of all publications using secondary production measures in Brazilian aquatic environments in different databases (\"Web of Science\", \"Scopus\" and \"Scielo\"). We found that secondary production measures are based on three main approaches: physiological, enzymatic and population dynamics. The main measures of zooplankton secondary production used in freshwater environments are based on recruitment and biomass increase methods while in transitional and marine environments predominate measures based on growth rate. We found 60 publications among scientific articles, thesis and book chapters developed in Brazil. The studies on zooplankton secondary production have grown in recent years, however most publications were carried out in the southeast region, especially in reservoirs with descriptive approaches. Since there is still a lack of basic information on tropical species and environments, it is important to develop new studies focusing on more complex issues, such as aquatic ecosystems functioning, the effects of environmental changes and anthropic impacts on ecosystem processes and the aquatic environments contribution to biogeochemical global cycles.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"85-99"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68000551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1891648.1004
S. Eagderi, A. Mouludi-Saleh, E. Çiçek
In this study, the length-weight relationships (LWRs) were estimated for 697 specimens belonging to ten species of Leuciscinae subfamily, viz. Squalius berak, S. namak, S. turcicus, Acanthobrama marmid, A. microlepis, Chondrostoma esmaeilii, Leuciscus latus, Alburnus doriae, Leucaspius delineates and Blicca bjoerkna from Iranian inland waters, including the Persian Gulf, Caspian Sea, Namak Lake, Dasht-e Kavir, Hari River and Isfahan basins. Total length and total weight of the examined specimens ranged 3.8-27.8 cm and 0.59-247 g, respectively. Fishes were collected using electrofishing device between July 2010 and August 2017. This study represents the first reports of LWRs data for A. doriae, C. esmaeilii, L. latus and L. delineates. The length-weight parameter b found to be 2.75 (A. microlepis) - 3.44 (B. bjoerkna) with regression coefficients (r2) ranging 0.87 to 0.99 for the studied fishes. The student’s t-test showed all studied species have a positive allometric growth pattern except A. doriae (isometric) and A. microlepis (negative allometric).
{"title":"Length-weight relationship of ten species of Leuciscinae sub-family (Cyprinidae) from Iranian inland waters","authors":"S. Eagderi, A. Mouludi-Saleh, E. Çiçek","doi":"10.22034/IAR(20).2020.1891648.1004","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1891648.1004","url":null,"abstract":"In this study, the length-weight relationships (LWRs) were estimated for 697 specimens belonging to ten species of Leuciscinae subfamily, viz. Squalius berak, S. namak, S. turcicus, Acanthobrama marmid, A. microlepis, Chondrostoma esmaeilii, Leuciscus latus, Alburnus doriae, Leucaspius delineates and Blicca bjoerkna from Iranian inland waters, including the Persian Gulf, Caspian Sea, Namak Lake, Dasht-e Kavir, Hari River and Isfahan basins. Total length and total weight of the examined specimens ranged 3.8-27.8 cm and 0.59-247 g, respectively. Fishes were collected using electrofishing device between July 2010 and August 2017. This study represents the first reports of LWRs data for A. doriae, C. esmaeilii, L. latus and L. delineates. The length-weight parameter b found to be 2.75 (A. microlepis) - 3.44 (B. bjoerkna) with regression coefficients (r2) ranging 0.87 to 0.99 for the studied fishes. The student’s t-test showed all studied species have a positive allometric growth pattern except A. doriae (isometric) and A. microlepis (negative allometric).","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"133-136"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68000956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1892283.1007
Imane Haoujar, J. Abrini, Housni Chadli, Adil Essafi, H. Nhhala, Kamal Chebbaki, F. Cacciola, N. Senhaji
The objective of this study was to assess the biologic impact of four diets based on three species of microalgae on the Mediterranean mussels Mytilus galloprovincialis. For this purpose, flesh weight, linear growth, survival rate and the biochemical composition of mussel flesh have been evaluated. Mussels fed with a mixture of the three species; Nannochloropsis sp., Dunaliella sp., and Phaeodactylum sp., exhibited the highest lipid level (7.66%). This suggests that mixing several species in the same diet favors lipid production. Protein level was significantly higher in mussels fed with Dunaliella sp. (28.92%) compared to Phaeodactylum sp (24.52%), Nannochloropsis sp. (22.94%) and a combination of the three species (26.07%). Wet weight gain was significantly higher in mussels fed with Dunaliella sp. (7.76 g) compared to mussels fed with the mixture of the three species (6.87 g). However, mussel shell length was not different among the four groups, and ranged between 41.7 mm and 42.3 mm. In conclusion, the data from this study suggest that a diet based on Dunaliella sp. can efficiently cover the protein requirements of the Mediterranean mussel, Mytilus galloprovincialis during the growth cycle.
{"title":"Effect of four diets based on three microalgae on the growth performance and quality of Mediterranean mussel flesh, Mytilus galloprovincialis","authors":"Imane Haoujar, J. Abrini, Housni Chadli, Adil Essafi, H. Nhhala, Kamal Chebbaki, F. Cacciola, N. Senhaji","doi":"10.22034/IAR(20).2020.1892283.1007","DOIUrl":"https://doi.org/10.22034/IAR(20).2020.1892283.1007","url":null,"abstract":"The objective of this study was to assess the biologic impact of four diets based on three species of microalgae on the Mediterranean mussels Mytilus galloprovincialis. For this purpose, flesh weight, linear growth, survival rate and the biochemical composition of mussel flesh have been evaluated. Mussels fed with a mixture of the three species; Nannochloropsis sp., Dunaliella sp., and Phaeodactylum sp., exhibited the highest lipid level (7.66%). This suggests that mixing several species in the same diet favors lipid production. Protein level was significantly higher in mussels fed with Dunaliella sp. (28.92%) compared to Phaeodactylum sp (24.52%), Nannochloropsis sp. (22.94%) and a combination of the three species (26.07%). Wet weight gain was significantly higher in mussels fed with Dunaliella sp. (7.76 g) compared to mussels fed with the mixture of the three species (6.87 g). However, mussel shell length was not different among the four groups, and ranged between 41.7 mm and 42.3 mm. In conclusion, the data from this study suggest that a diet based on Dunaliella sp. can efficiently cover the protein requirements of the Mediterranean mussel, Mytilus galloprovincialis during the growth cycle.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"12 1","pages":"137-145"},"PeriodicalIF":1.3,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49142679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-06-01DOI: 10.22034/IAR(20).2020.1897402.1033
S. Mousavi, Somayeh Zahedinezhad, J. Loh
The depletion of global fishery stock has posted significant effects to the world capture fishery industry. Constant environmental issues and fluctuation of fish meal (FM) costs have pushed the aquafeed industry to seek for alternative protein sources to sustain the huge demand of feed in aquaculture production. Insect meal (IM) has already started to gain global attention as an alternative for FM replacement. Substantial feeding trials have revealed its promising application not only beneficial as in protein replacement but also playing a vital role as a functional ingredient that boosting immunostimulatory effects in a wide range of aquatic animals. Here, we compiled and categorized several major groups of insects, for example black soldier fly, yellow mealworm, housefly, silkworm, alongside a minor group of insect species widely used as the alternative diet in aquaculture. Critically, we discuss the functional properties of the IMs, their immunomodulatory, and physiological effects in aquatic species. Biological parameters include oxidative stress, serum biochemical, hematological parameters, and immune-related genes are also further discussed in this review. In short, we suggest that low levels of IM supplementation could improve survival, immunity, and feed conversion efficiency of targeted aquaculture species. Chitin and its derivatives alongside active substances in insect exoskeleton, such as antimicrobial peptides (AMPs) play an essential role in the immunomodulation of aquatic organisms. Knowledge of this area is still in infancy. Therefore, it is a critical need to further address the mechanism of immunomodulation focusing on the isolated components from IMs.
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