Mediterranean Aquaculture Journal最新文献_第2页

Improving the growth, feed efficiency and hematological indicators of Nile tilapia fingerlings Oreochromis niloticus using dietary lactic acid supplementation with different feeding routines 饲粮中添加不同饲养方式的乳酸对尼罗罗非鱼鱼种生长、饲料效率和血液学指标的影响

Mediterranean Aquaculture Journal Pub Date : 2022-11-01 DOI: 10.21608/maj.2022.156031.1012

A. El-dakar, S. Shalaby,, Basma Mohamed, Mohamed F. Abdel-Aziz

{"title":"Improving the growth, feed efficiency and hematological indicators of Nile tilapia fingerlings Oreochromis niloticus using dietary lactic acid supplementation with different feeding routines","authors":"A. El-dakar, S. Shalaby,, Basma Mohamed, Mohamed F. Abdel-Aziz","doi":"10.21608/maj.2022.156031.1012","DOIUrl":"https://doi.org/10.21608/maj.2022.156031.1012","url":null,"abstract":": A 42-day trial 2 × 2 factorial study was conducted to investigate the importance of using lactic acid (LA) as a feed additive in different feeding regimes on the growth, feed and blood indicators of Nile tilapia fingerlings Oreochromis niloticus . Two levels of feed additives 0% and 1% Lactic acid with two feeding systems—1) half of the daily meal was offered in the morning and the other half in the afternoon and 2 ــــ ) 3/4 (75 %) of the daily meal was offered in the morning and the other 1/4 (25%) in the afternoon. Fingerlings were stocked in 12 plastic aquaria (60 liters), with 10 fish/ aquaria. A commercial diet of 30% crude protein was used with a feeding rate of 3% of the biomass. The results showed, dietary LA had a positive impact on fish performance compared with feeding regimes. Fishes that were fed dietary LA with 50% of daily meal in the morning were the best in growth and blood parameters followed by fishes that were fed a diet without LA with 75% of their meal in the morning.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130599778","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}

引用次数: 0

Exogenous β-mannanase and Dl-methionine as feed additives to improve growth, feed efficiency and hematological indices of Nile tilapia Oreochromis nilotucs fed dietary plant protein 外源β-甘露聚糖酶和l-蛋氨酸作为饲料添加剂提高尼罗罗非鱼饲料中植物蛋白的生长、饲料效率和血液学指标

Mediterranean Aquaculture Journal Pub Date : 2022-11-01 DOI: 10.21608/maj.2022.164553.1014

A. El-dakar, S. Shalaby,, S. Abdel-Salam, Shaimaa Gomaa Gomaa, Mohamed F. Abdel-Aziz

{"title":"Exogenous β-mannanase and Dl-methionine as feed additives to improve growth, feed efficiency and hematological indices of Nile tilapia Oreochromis nilotucs fed dietary plant protein","authors":"A. El-dakar, S. Shalaby,, S. Abdel-Salam, Shaimaa Gomaa Gomaa, Mohamed F. Abdel-Aziz","doi":"10.21608/maj.2022.164553.1014","DOIUrl":"https://doi.org/10.21608/maj.2022.164553.1014","url":null,"abstract":": The present study was done to determine the effects of exogenous β-mannanase (Hemicel® enzyme) and methionine on growth performance and blood parameters of Nile tilapia Oreochromis niloticus fed plant protein diet. Two basal diets were formulated to contain 27% CP one of them contained fishmeal (A) and other was plan protein (B). This study included six treatments were as the following: T1: (negative control) fish fed with diet A, T2: (positive control) fish fed on diet B, T3 and T4: fish fed on diet B with adding 0.025 and 0.05 % of Hemicel®, respectively, and T5: fish fed the diet B with 0.025% of Hemicel® and 5% methionine and T6: Diet B with adding 0.05 % Hemicel and 5% methionine. 120 juveniles were randomly divided into 12 plastic tanks (water size: 35 liters) with density of 10 fish/tank. Fish reared in saline of 3ppt, and fed two times daily for six days weekly with rate of 4% of body weight. Results confirmed that feed additives of Hemicel and Dl-methionine significantly improved nutritional utilization of plant protein diets. One way ANOVA analysis did not show significant differences in growth performance between fish fed with a soy-based diet containing 0.025% Hemicel® and Dl-methionine 0.5% (T5) and those fed with the diet containing fish meal (T1). Fish in T5 and T4 had highest body content of protein and the best blood indicator. Generally it can be totally replaced fish meal by soy bean with adding Hemicel® and Dl-methionine at levels of 0.025% and 0.5% respectively.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130821888","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}

引用次数: 2

Growth performance of red breasted tilapia (coptodon rendalli) fed maize bran and Amaranthus hybridus leaves under pond culture 玉米糠和苋菜叶对红胸罗非鱼池塘生长性能的影响

Mediterranean Aquaculture Journal Pub Date : 2022-11-01 DOI: 10.21608/maj.2022.135806.1011

Edwin Kikamba, Jeremiah Kangombe

{"title":"Growth performance of red breasted tilapia (coptodon rendalli) fed maize bran and Amaranthus hybridus leaves under pond culture","authors":"Edwin Kikamba, Jeremiah Kangombe","doi":"10.21608/maj.2022.135806.1011","DOIUrl":"https://doi.org/10.21608/maj.2022.135806.1011","url":null,"abstract":": A study was carried out to evaluate the effect of substituting Amaranthus hybridus leaves for maize bran as feed on growth of juvenile Coptodon rendalli . Fresh chopped Amaranthus hybridus (100%) and dried milled maize bran (100%) and mixture of fresh chopped Amaranthus hybridus and maize bran (50:50) were given as different dietary treatments. The three diets were fed to triplicate groups of fish fingerlings (9.68±0.16 g) stocked in 100m 2 ponds and fed at 5% of body weight for 84 days. The diets of Amaranthus hybridus, maize bran and combination of Amaranthus hybridus and maize bran produced insignificantly differences ( P >0.05) in final weight gain, where with Amaranthus hybridus producing average weights of 33.57 ± 1.15 g, Maize bran with average weights of 31.01 ± 1.05 g and a combination producing average weight of 34.42 ± 1.15g. The Apparent feed conversion ratios and Specific growth rates (SGR) didn‟t significantly differ ( P >0.05) among the treatments. There were also no significant differences ( P >0.05) in total lengths at termination of (84 days) and it ranged from 120.72±0.14 mm to 124.83±0.10 mm whose stocking mean length ranged from 81.55±0.31 mm to 82.87±0.21 mm. Survival rates ranged from 98.70% to 99.96% and didn‟t differ significantly ( P >0.05) among treatments. These results indicate that the feeding of Coptodon rendalli with only Amaranthus hybridus or Maize bran or a combination of Amaranthus hybridus and Maize bran produce a similar result. The present study demonstrates that in the event that maize bran is unavailable, Amaranthus hybridus can substitute it as fish feed or its combination would produce similar results.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132627297","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}

引用次数: 1

Influence of forzymedry© enzyme and protein levels on Nile tilapia, Oreochromis niloticus fry performance and histology. forzymedry©酶和蛋白质水平对尼罗罗非鱼鱼苗生产性能和组织学的影响。

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225683

D. El-Saidy, A. El-Hais, E. Hussein

{"title":"Influence of forzymedry© enzyme and protein levels on Nile tilapia, Oreochromis niloticus fry performance and histology.","authors":"D. El-Saidy, A. El-Hais, E. Hussein","doi":"10.21608/maj.2021.225683","DOIUrl":"https://doi.org/10.21608/maj.2021.225683","url":null,"abstract":"This study was performed to estimate the effect of protein, forzymedry© enzyme (cellulase, xylanase, B-glucanase, pectinase and galactosidase) and their interaction on the growth performance, body composition, some blood metabolites and histological statement of Nile tilapia, Oreochromis niloticus fry. A factorial trial (2 x4) two levels of dietary protein 20 and 25% (D20& D25) with four levels of forzymedry enzyem as feed additives (0, 25, 50 and 75 mg/kg diet). Results showed that, growth rate was not significantly differed by dietary protein but protein efficiency ratio (PER) was increased significantly (P<0.05) by increasing protein level. Increased dietary forzymedry enzyme level resulted in enhancing feed efficiency ratio, protein efficiency ratio, and survival rate significantly (P<0.05). The interacted effect influenced significantly (P<0.05) on all parameters of growth performance except for feed intake. And dietary 20% CP with adding 75mg/kg of enzyme had the best growth patamteres. The higher whole body protein of tested fish was obtained by 20% CP diet supplemented with adding 25 and 50 mg/ kg of Forzymedry© enzyme compared to other experimental diets. There were slightly differences among different interaction patterns of supplemental protein and enzyme for blood parameters as total protein, albumin, globulin and glucose. Also, there were no hazards effects on the histology statement with protein levels and/or forzymedry© enzyme. So, it can be use Forzymedry© enzyme with dietary lower total protein levels of 20 and 25% of Nile tilapia, Oreochromis niloticus fry.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121668416","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}

引用次数: 0

Applying Nano-technology in tilapia Nutrition: influence of Iron and Zinc nanoparticles as dietary supplementary on biological performance and body composition of Oreochromis niloticus fry 纳米技术在罗非鱼营养中的应用:饲料中添加纳米铁和锌对尼罗鱼鱼苗生物性能和体成分的影响

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225673

Mohammed S Abd-Elhamed, Sobhy M Allm, Kamal Z. El-Deeb, A. Atalla, Metwalli, H. Saleh, M. Abdel-Aziz

{"title":"Applying Nano-technology in tilapia Nutrition: influence of Iron and Zinc nanoparticles as dietary supplementary on biological performance and body composition of Oreochromis niloticus fry","authors":"Mohammed S Abd-Elhamed, Sobhy M Allm, Kamal Z. El-Deeb, A. Atalla, Metwalli, H. Saleh, M. Abdel-Aziz","doi":"10.21608/maj.2021.225673","DOIUrl":"https://doi.org/10.21608/maj.2021.225673","url":null,"abstract":"A 102 day feeding trial were conducted to compare the effect of three levels of iron (nFe2O3) and zinc (nZnO) nanoparticles with the same levels of Fe (Fe2O3) and Zinc (ZnO) bulk particles as feeding additive on growth performance, feed efficiency, chemical body composition and tissue accumulations of Nile tilapia Oreaochromis niloticus fry. Fry with an initial weight of 1.66 g were reared in cement pond (0.8m3). The basal diet was formulated to be containing 30% CP and mixed with the mineral additives according to the tested treatments. The fish were fed twice daily at (8, am) and (4, pm), with a rate of 5% of biomass. The obtained results showed a significant differences(P≤0.05) between treatments in growth parameters, feed efficiency , body chemical composition and tissue accumulation from Fe and Zn. Fry fed a diet containing (20 mg Nano iron oxide + 20 mg Nano zinc oxide) achieved the best values of each growth performance and feed conversion ratio (FCR). On the other hand, the addition of nanoparticles (Fe+Zn) in supplemented feed resulted a high accumulation in fry whole body compared with the bulk form of (Fe+Zn).","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133585073","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}

引用次数: 0

A Study on growth performance and proximate composition of African catfish (Clarias gariepinus) fed diets containing varying levels of vitamin A fortified cassava leaf meal 饲粮中添加不同水平维生素A强化木薯叶粉对非洲鲶鱼生长性能和近似组成的影响

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225671

A. Anene, E. Okorie, Patience Ogoma Egemba

{"title":"A Study on growth performance and proximate composition of African catfish (Clarias gariepinus) fed diets containing varying levels of vitamin A fortified cassava leaf meal","authors":"A. Anene, E. Okorie, Patience Ogoma Egemba","doi":"10.21608/maj.2021.225671","DOIUrl":"https://doi.org/10.21608/maj.2021.225671","url":null,"abstract":"This study was conducted to evaluate the growth performance and fillet quality of Clarias gariepinus fed varying levels of vitamin A fortified cassava leaf meal (VA-F-CLM) as a partial replacement for soybean meal. Four isonitrogenous experimental diets were formulated replacing soybean with vitamin A fortified cassava leaf meal at 0%, 5%, 10% and 15% (T1, T2, T3 and T4, respectively). A total of 120 juvenile Clarias gariepinus averaging 15±0.56g were randomly distributed into twelve aquaria at ten fish per aquarium, with three replicate aquaria for each experimental diet. During the feeding trial, fish were fed to satiation twice daily. At the end of a sixty-day feeding trial, weight gain and feed efficiency of fish fed T1 were significantly higher than values for fish fed T2, T3 and T4 (P<0.05). There was a difference (P<0.05) in weight gain, feed efficiency, protein efficiency ratio and feed efficiency ratio of fish fed experimental diets. Weight gain and feed efficiency of fish fed T2 were significantly higher than those of fish fed T3 and T4. Protein efficiency ratio of fish fed T1 was significantly higher than values for fish fed T3 and T4. Based on growth performance, VA-F-CLM could replace up to 5% of soybean protein. Dry matter and ash, increased (P<0.05) with increasing levels of dietary VA-F-CLM supplementation. Moreover optimum protein content in fish fillet was recorded with T2.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122168779","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}

引用次数: 0

Effect of dietary supplementation of Yeast, Garlic and Enzymes on growth performance and economic evaluation in European Eel (Anguilla anguilla) fry 日粮中添加酵母、大蒜和酶对欧洲鳗鲡鱼苗生长性能和经济效益的影响

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225682

Abdelhady M. Moghazy, A. Mansour, Walid M. Fayed, E. Omar, M. Tarek, Srour

{"title":"Effect of dietary supplementation of Yeast, Garlic and Enzymes on growth performance and economic evaluation in European Eel (Anguilla anguilla) fry","authors":"Abdelhady M. Moghazy, A. Mansour, Walid M. Fayed, E. Omar, M. Tarek, Srour","doi":"10.21608/maj.2021.225682","DOIUrl":"https://doi.org/10.21608/maj.2021.225682","url":null,"abstract":"This study was conducted to investigate the effect of feeding three commercial feed additives Tonilisat® (Saccharomyces cerevisiae), Garlin® (26% allicin), Enziver® (Multi-enzymes) and different mixtures of them on growth performance, feed utilization, body composition and cost benefit of European eel (Anguilla anguilla) fry. A total of 160 European eel fry (3.0±0.2 g/fish) were divided into 8 groups (10 fish/tank in two replicates) for 120 days. Eight dietary treatments were conducted as follow: the first diet considered to be the control without any additives. The second and third diets contain 0.2% of Tonilisat® and Garlin®, respectively. The fourth diet contains 0.1% of Enziver®, The fifth diet contains a mixture of 0.1% Tonilisat® with 0.1% Garlin®, the sixth diet contains a mixture of 0.1% e Tonilisat® with 0.05% Enziver®, the seventh diet contains a mixture of 0.1% Garlin® with 0.05% Enziver®, and the eighth diet contains a mixture of 0.1% Tonilisat® , 0.1% Garlin® and 0.05% Enziver®, respectively. The obtained results indicated that growth performance, feed conversion ratio and nutrient utilization were significantly improved in eels fed diet supplemented with multi-enzymes and different mixtures of feed additives. The survival rate (%) and whole body proximate composition didn’t differ significantly among different experimental groups. Meanwhile, the profit index improved significantly with multi-enzyme supplementation and the combinations of yeast, garlic and multienzyme increased diets benfits. Therefore, it’s reasonable to incorporate exogenous multi-enzymes or combination of yeast, garlic and multi-enzyme in the diets of European eels. Keyword: Feed additives, Eel (Anguilla anguilla), Growth performance, feed utilization, economic evaluation. Received: Nov., 15, 2017 Accepted: Feb., 5, 2022","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126201211","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}

引用次数: 0

Influence of Traditional Smoking Methods on Quality and Safety of Farmed Mullet Fish (Mugil cephalus) in Fayoum governorate, Egypt 传统烟熏方法对埃及法尤姆省养殖鲻鱼质量和安全的影响

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225670

Mohamed Saleh, Shaban Elsherif, Khalil Khalil, A. Mohdaly, Samah Abd-Eltawab

{"title":"Influence of Traditional Smoking Methods on Quality and Safety of Farmed Mullet Fish (Mugil cephalus) in Fayoum governorate, Egypt","authors":"Mohamed Saleh, Shaban Elsherif, Khalil Khalil, A. Mohdaly, Samah Abd-Eltawab","doi":"10.21608/maj.2021.225670","DOIUrl":"https://doi.org/10.21608/maj.2021.225670","url":null,"abstract":"This study was carried out to determine the effect of traditional smoking methods on physiochemical quality and potential risks by biogenic amines and microbiological aspects of mullet fish ( Mugil cephalus) obtained from two farms (1 and 2); irrigated El-Batts and El-Wadi drains, respectively, located in Fayoum Governorate. The results revealed that values of quality parameters and biogenic amines in raw and smoked mullet from farm (1) were higher than from farm (2). Values of quality parameters and biogenic amines of hot smoked lower than cold smoked fish. Histamine and tyramine levels decreased by smoking, but spermine, putrescine and cadaverine increased. Total bacterial count (TBC) of raw fish from farm (1) was 4.26 Log 10 cfu/g decreased to 3.35 and 3.05 log 10 cfu/g of cold and hot smoked samples, respectively. On other side TBC of raw sample farm (2) was 3.36 Log 10 cfu/g decreased to 3.12 and 2.85 Log 10 cfu/g of cold and hot smoked samples. Yeasts and mold (Y&M) recorded 1.88 Log 10 cfu/g for raw sample farm (1) decreased to 1.20 and 0.82 Log 10 cfu/g of cold and hot smoked samples, whereas the recorded 1.54 Log 10 cfu/g in raw samples from farm (2), decreased to 1.00 and 0.50 log 10 cfu/g of cold and hot smoked, respectively. Therefore, from obtained results, it could be concluded that cold and hot smoked samples from farm (2) has higher quality and safety than from farm (1). Also, Hot smoked samples were higher quality and safety than cold smoked. So, Cold and hot smoking process could be reduced the values of risk sources and raised the safety level of consumer.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132084468","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}

引用次数: 0

Changes in chemical composition and heavy metal levels in mullet (Mugil cephalus) fish during traditional smoking 传统熏制过程中鲻鱼体内化学成分和重金属含量的变化

Mediterranean Aquaculture Journal Pub Date : 2021-12-01 DOI: 10.21608/maj.2021.225672

M. Kourany, Khalil Khalil, S. El-Sherif, A. Mohdaly, A. Samah, Abd-Eltawab

{"title":"Changes in chemical composition and heavy metal levels in mullet (Mugil cephalus) fish during traditional smoking","authors":"M. Kourany, Khalil Khalil, S. El-Sherif, A. Mohdaly, A. Samah, Abd-Eltawab","doi":"10.21608/maj.2021.225672","DOIUrl":"https://doi.org/10.21608/maj.2021.225672","url":null,"abstract":"This study was carried out to assess the changes in chemical composition and heavy metal levels of mullet fish following hot and cold smoking. Mullet fish samples were collected in September 2020 from two fish farms (1 and 2) in Fayoum Governorate, irrigated by El-Batts and El-Wadi drains, respectively. The findings of determining biochemical characteristics (moisture, protein, lipid, and ash) revealed that the moisture content decreased from initial 74.82% to 63.22 and 59.32 in raw, cold and hot smoked products obtained from farm 1, respectably. While these levels were 72.10% decreased to 61.25% and 58.06% in raw, cold and hot smoked products, while protein and lipid contents increased after smoking in both fish farms samples. Also, ash contents have been found to increase from 1.23% and 1.11% in raw samples to 5.14% and 6.52% in cold and hot smoked products from farms (1 and 2). Levels of Lead (Pb), Cadmium (Cd) and Zinc (Zn) have been determined in raw and smoked products. Lead (Pb) levels were 0.013 ppm in raw samples from farm 1, increased from 0.103 ppm in farm 1 raw samples to 0.210 and 0.252 ppm in cold and hot smoked samples, respectively. Sam trend obtained in farm 2 samples. Cadmium (Cd) and Zinc (Zn) levels increased after cold and hot smoking in all mullet fish samples.","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123961465","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}

引用次数: 0

Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse) 纳多尔泻湖发展海藻养殖作为小规模渔民补充收入的机会:格拉子(Gracilaria gracilis)的试验栽培(斯塔克豪斯)

Mediterranean Aquaculture Journal Pub Date : 2019-01-30 DOI: 10.21608/maj.2022.5857.1003

J. Kassila, H. Nhhala, T. Givernaud, Mahdi Monsouri, Azzedine Abrehouch, Abdelhakim Mosfioui

{"title":"Opportunities for the development of seaweed farming as a supplementary income for small-scale fishermen in Nador lagoon: Experimental cultivations of Gracilaria gracilis (Stackhouse)","authors":"J. Kassila, H. Nhhala, T. Givernaud, Mahdi Monsouri, Azzedine Abrehouch, Abdelhakim Mosfioui","doi":"10.21608/maj.2022.5857.1003","DOIUrl":"https://doi.org/10.21608/maj.2022.5857.1003","url":null,"abstract":"The development of seaweed farming in Nador lagoon (NE Morocco, Mediterranean Sea) offers the best hope for raising incomes in fishing communities. The feasibility of growing red seaweed, Gracilaria gracilis (Gigartinales, Rhodophyta) in off-bottom and floating longline systems was investigated in Bouareg location. Several constraints such as epiphytism and wood borers arose in off-bottom cultures. The weight gains of G. gracilis in off-bottom cultures tested in winter, were low. The lowest daily growth rate (DGR) was recorded in sheet-lines (1.91 % day -1 , p < 0.01) while the highest’s RGR were observed in net-lines and ropes-lines (2.72 and 2.77 % day -1 respectively, p < 0.01). Plants of G. gracilis grew well in the floating longline culture tested at spring. The weight growth rates ranged between 2.54 and 4.26 % day -1 . The highest growth rate in Nador lagoon was observed in treatment stocked with 0.6 kg m -2 . The high stocking density (0.8 kg m -2 ) leaded to low growth most probably due to stress on the seaweed when competing for space and resources. Over a 60-day cycle, the harvest of G. gracilis cultivated on floating longline system in Nador lagoon was estimated at about 101 t FWT ha -1 year -1 . With 8:1 as wet to dry ratio, the production yield per cropping was estimated at 3,156 kg (DW) per ha. However, the total sales per year was estimated at about $ 6,564 per ha. The Gracilaria farming may provide supplementary income to artisanal farmers in Nador lagoon .","PeriodicalId":274624,"journal":{"name":"Mediterranean Aquaculture Journal","volume":"429 1-3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131931931","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}

引用次数: 8