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Overview Of Decadal Ecosystem Changes In The Western Arabian Sea And The Occurrence Of Algal Blooms, Paul Harrison, Sergey Piontkovski, Khalid Al-Hashmi Apr 2025

Overview Of Decadal Ecosystem Changes In The Western Arabian Sea And The Occurrence Of Algal Blooms, Paul Harrison, Sergey Piontkovski, Khalid Al-Hashmi

Journal of Agricultural and Marine Sciences

Gradual decadal changes have taken place in the Western Arabian Sea over the last 50 years. These changes have affected wind speeds, atmospheric and sea surface temperature, thermohaline stratification, shoaling of the oxycline, and dust/iron inputs. A decrease in nitrate supply of the photic layer have caused an increase in annual frequency of harmful algal blooms and fish kills. Along with that, a decrease in diatom biomass and a shift from red Noctiluca to green Noctiluca during the northeast monsoon was observed during the last two decades, Even though these are the same species they have very different nutritional modes. …

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2nd Gcc Marine Biotechnology Conference: Emerging Opportunities And Future Perspectives, Sergey Dobretsov Apr 2025

2nd Gcc Marine Biotechnology Conference: Emerging Opportunities And Future Perspectives, Sergey Dobretsov

Journal of Agricultural and Marine Sciences

2nd GCC Marine biotechnology conference was held at Sultan Qaboos University, 31 October - 1 November 2017. The conference was organized by the Center of Excellence in Marine Biotechnology, SQU. The conference focused on four major themes, including Genetics and biodiversity, Marine biofouling and its prevention, Marine natural products, and Aquaculture and fisheries. In total, 160 delegates from 23 different countries were registered for this conference and 106 delegates attended the conference. One plenary lecture and three keynote addresses were given, 39 oral and 30 poster presentations were made. The final session reviewed national and regional issues and identified some …

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Integrated Aquaculture In Arid Environments, Stephen Goddard, Fatma Saif Al-Abri Apr 2025

Integrated Aquaculture In Arid Environments, Stephen Goddard, Fatma Saif Al-Abri

Journal of Agricultural and Marine Sciences

Around one third of the globe is classified as desert or arid (<200mm rain annually) and most such regions lack food security. Traditional freshwater aquaculture is often a marginal activity and competes with agriculture for limited water resources. Developing technologies offer new opportunities to increase productivity of aquaculture through integration with vegetable production in aquaponic systems and to reduce water requirements through the application of biofloc technology. Aquaponic systems combine aquaculture and hydroponic plant production and are integrated within a re-cycled water system. Fish waste metabolites provide the nutrients for plants grown in soil-less, hydroponic systems. Biofloc farming systems operate with minimum or zero water exchange. Suspended biofloc particles develop in fish tanks under conditions of full aeration and controlled carbon to nitrogen ratios. They comprise algae, bacteria, protozoa and particulate organic matter held in a loose matrix. They provide in-situ treatment of harmful fish metabolites, are protein rich, contain essential fatty acids, vitamins and minerals and supplement the diets of filter-feeding farmed species. The integration of fish culture with vegetable production provides new opportunities for small and medium enterprises. Integrated farms occupy a small footprint, optimise the use of resources and can be built close to population centres. This paper reviews current developments in aquaponics and biofloc technology against the background of food security needs in arid regions.

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Extraction Of Natural Colors From Marine Algae, Tanveer -. Alam Apr 2025

Extraction Of Natural Colors From Marine Algae, Tanveer -. Alam

Journal of Agricultural and Marine Sciences

Abstract:The pigment content in microalgae is a specific feature of each species. Colors from natural sources are gaining more importance mainly due to health and environmental issues. Algae contain a wide range of pigments. Three major classes of pigments are chlorophylls, carotenoids (carotenes and xanthophylls) and phycobilins (Phycocyanin and phycoerythrin). Phycocyanin and phycoerythrin belong to the major class of phycobilins photosynthetic pigment while fucoxanthin and peridinin belong to carotenoid group of photosynthetic pigment. Macro- and microalgae (including cyanobacteria) have been recognized to provide a wide diversity of metabolites including pigments for energy capture and photo-protection. One of the main objectives …

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Moisture And Temperature In A Proppant-Enveloped Silt Block Of A Recharge Dam Reservoir: Laboratory Experiment And 1-D Mathematical Modelling, Anvar Kacimov, Ali Al-Maktoumi, Said Al-Ismaily, Hamed Al-Busaidi Apr 2025

Moisture And Temperature In A Proppant-Enveloped Silt Block Of A Recharge Dam Reservoir: Laboratory Experiment And 1-D Mathematical Modelling, Anvar Kacimov, Ali Al-Maktoumi, Said Al-Ismaily, Hamed Al-Busaidi

Journal of Agricultural and Marine Sciences

Mosaic 3-D cascade of parallelepiped-shaped silt blocks, which sandwich sand- lled cracks, has been discovered in the eld and tested in lab experiments. Controlled wetting-drying of these blocks, collected from a dam reservoir, mimics field ponding-desiccation conditions of the topsoil layer subject to caustic solar radiation, high temperature and wind, typical in the Batinah region of Oman. In 1-D analytical modelling of a transient Richards’ equation for vertical evaporation, the method of small perturbations is applied, assuming that the relative permeability is Avery-anov’s 3.5-power function of the moisture content and capillary pressure is a given (measured) function. A linearized advective …

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Agricultural Resources Management Through A Linear Programming Approach: A Case Study On Productivity Optimization Of Crop-Livestock Farming Integration, Hemanatha P. W. Jayasuriya, Romy Das Apr 2025

Agricultural Resources Management Through A Linear Programming Approach: A Case Study On Productivity Optimization Of Crop-Livestock Farming Integration, Hemanatha P. W. Jayasuriya, Romy Das

Journal of Agricultural and Marine Sciences

The crop-livestock integrated farming system practiced in most developing countries depends to a greater extent on the ecosystem as a whole. The importance of animals as an agent of nutrient recycle, sources of rural energy in terms of draft power and fuel as well as major contributor of the farm economy, has resulted into increased population of ruminant stock in these regions creating threats to the sustainability and productivity of land resources. This case-study research attempted to formulate optimum herd size compatible to different resource holding farm categories within the sub watershed in mid hills region of Nepal. The research …

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Computer Vision Technique To Classify Dates Based On Hardness, Annamalai Manickavasagan, Naeema H. Al-Shekaili, Nawal K. Al-Mezeini, M. Shafiur Rahman, Negib Guizani Apr 2025

Computer Vision Technique To Classify Dates Based On Hardness, Annamalai Manickavasagan, Naeema H. Al-Shekaili, Nawal K. Al-Mezeini, M. Shafiur Rahman, Negib Guizani

Journal of Agricultural and Marine Sciences

Hardness is one of the important attributes in determining the quality of dried fruits. Hardness assessment is normally carried out by manual inspection. This method is time consuming, laborious, expensive and subjective. The objective of this study was to develop a computer vision system with a monochrome camera to classify dates based on hardness. Date samples were obtained from three different growing regions in Oman and graded into soft, semi-hard, and hard classes based on hardness. A total of 1800 date samples were imaged individually using a monochrome camera (600 dates / class). Histogram and texture features were extracted from …

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Effect Of Sugar Replacement With Date Paste And Date Syrup On Texture And Sensory Quality Of Kesari (Traditional Indian Dessert), Annamalai Manickvasagan, Chandini S. Kumar, Zaher H. Al-Attabi Apr 2025

Effect Of Sugar Replacement With Date Paste And Date Syrup On Texture And Sensory Quality Of Kesari (Traditional Indian Dessert), Annamalai Manickvasagan, Chandini S. Kumar, Zaher H. Al-Attabi

Journal of Agricultural and Marine Sciences

In this study, a popular Indian dessert, kesari, was reformulated by substituting refined sugar at various levels (0%=control, 25%, 50%, 75% and 100%) with date past and syrup, and changes in instrumental texture profile, L*a*b* colour values and sensory properties were determined. The hardness of date syrup kesari was higher than that of date paste kesari. However, there were no differences in hardness among various levels of replacement. There were no differences between syrup vs paste products or among various levels of replacements in cohesiveness, springiness, gumminess, adhesiveness and chewiness of kesari. The developed kesari scored 5.5 to 7.5 on …

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Carbon And Nutrient Balances In Three Mountain Oases In Northern Oman, Andreas Buerkert, Mohamed Nasser Al-Rawahi, Martina Melapie, Eva Schlecht Apr 2025

Carbon And Nutrient Balances In Three Mountain Oases In Northern Oman, Andreas Buerkert, Mohamed Nasser Al-Rawahi, Martina Melapie, Eva Schlecht

Journal of Agricultural and Marine Sciences

Carbon (C) and nitrogen (N) fluxes of two cropping systems in three mountain oases of Al Jabal Al-Akhdar mountains of northern Oman were determined in 2008/09 and 2009/10. These comprised garlic at Ash Sharayjah (1,900 m asl) and Masayrat (1,030 m asl), pomegranate in Ash Sharayjah and Qasha’ (1,640 m asl), and date palm groves at Masayrat. Goat manure was applied to garlic fields at 47 and 40 t dry matter (DM) ha-1 at Ash Sharayjah and 42 and 37 t DM ha-1 at Masayrat. Pomegranates at Ash Sharayjah and Qasha’ received cattle dairy manure at 66 and 60 t …

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Genetic And Environmental Factors Affecting 305-Day Mature Equivalent Milk Yield Of Holstein Friesian Cows In The United Arab Emirates, Mohamed Elnour Elboshra, Tagelsir Eisa Ali, Ali Ahmed Hassabo Apr 2025

Genetic And Environmental Factors Affecting 305-Day Mature Equivalent Milk Yield Of Holstein Friesian Cows In The United Arab Emirates, Mohamed Elnour Elboshra, Tagelsir Eisa Ali, Ali Ahmed Hassabo

Journal of Agricultural and Marine Sciences

The main objective of this research was determining the effect of sire of cow, year and season of freshening, lactation number, and their different interactions on 305-day mature equivalent (ME) milk yield of Holstein Friesian cows in the United Arab Emirates (UAE). It also aimed to estimate sire and error variance and heritability of 305-day ME milk yield. The data was collected from AL Salamat Dairy Farm in Al Ain. The average size of the herd was 1000 animals during the experimental period. The Dairy Comp 305 computer program was used for compiling the data. The data under the study …

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Serum Biochemistry Parameters In The Omani Racing Arabian Camels (Camelus Dromedarius), Yasmin Elhag Eltahir, Hassan Mohammed Ali, B.E. Hago, O. Mahgoub Apr 2025

Serum Biochemistry Parameters In The Omani Racing Arabian Camels (Camelus Dromedarius), Yasmin Elhag Eltahir, Hassan Mohammed Ali, B.E. Hago, O. Mahgoub

Journal of Agricultural and Marine Sciences

Blood samples were collected from thirty, 2-year old female Arabian camels from the eastern region of Oman. Camels were managed in the traditional way in the Arabian Gulf region, primarily fed fresh alfalfa and barley grain. Blood was drawn into serum vaccutainers from jugular venipuncture. Serum samples were analyzed by spectrophotometric analysis using a CX7/CX7 serum chemistry analyzer (Synchron, Beckman). Means, standard deviations and minimum and maximum values were calculated using Excel spreadsheets on Microsoft Office 2007. The SAS (2000) package was used to produce coefficient of determination (R2) between the eight serum mineral values. The following mean values Å} …

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Identification And Characterization Of Two Amylase Producing Bacteria Cellulosimicrobium Sp. And Demequina Sp. Isolated From Marine Organisms, Laila S.H. Al-Naamani, Sergey Dobretsov, Jamal Al-Sabahi, Bassam Soussi Apr 2025

Identification And Characterization Of Two Amylase Producing Bacteria Cellulosimicrobium Sp. And Demequina Sp. Isolated From Marine Organisms, Laila S.H. Al-Naamani, Sergey Dobretsov, Jamal Al-Sabahi, Bassam Soussi

Journal of Agricultural and Marine Sciences

Marine sources have been known to yield novel compounds with a wide range of bioactivity with various commercial applications. In this study, the abilities of bacteria isolated from eight marine organisms to produce α-amylase were examined. All eight organisms were found to harbor amylase producing bacteria. Two bacterial species isolated from the green alga Ulva rigida and the sponge Mycale sp. were further identified and their α-amylases were purified and characterized. The bacterial species isolated from U. rigida and Mycale sp. were identified by DNA sequencing as Cellulosimicrobium sp. and Demequina sp., respectively. Cellulosimicrobium sp. obtained maximum cell growth and …

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Culture Conditions Affect The Nutritional Value Of The Copepod Acartia Tonsa, Arne M. Malzahn, Nicole Aberle-Malzahn, Katherina Schoo, Maarten Boersma Apr 2025

Culture Conditions Affect The Nutritional Value Of The Copepod Acartia Tonsa, Arne M. Malzahn, Nicole Aberle-Malzahn, Katherina Schoo, Maarten Boersma

Journal of Agricultural and Marine Sciences

Live feed are still necessary for the rearing of larval stages of several fish species, especially marine ones. Compared to Artemia, copepods are of superior quality. This is based on a suite of traits like size, movement, and nutritional value. Copepods are for example usually high in protein and fatty acids. Essential fatty acid profiles reflect to a large degree the fatty acid supply, which provides the opportunity to manipulate fatty acid profiles of, amongst others, copepods. By manipulating nutrient supply of the algae Rhodomonas salina we were able to double essential fatty acid concentrations in naupliar and copepodit life …

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Protein Resources And Aquafeed Development In The Sultanate Of Oman, Stephen Goddard, Fahad Saleh Ibrahim Apr 2025

Protein Resources And Aquafeed Development In The Sultanate Of Oman, Stephen Goddard, Fahad Saleh Ibrahim

Journal of Agricultural and Marine Sciences

The continued growth of intensive aquaculture is dependent on the development of sustainable protein sources to replace conventional fish meals in aquafeeds. Practical alternatives are plant-derived protein, protein from micro-organisms and protein from under-utilized marine resources. The challenges are to find alternative ingredients with high protein, suitable amino acid content, high palatability and absence of anti-nutritional factors. There is considerable biotechnology-based research in this area, including genetic modification of plant-based proteins, use of probiotics to enhance digestibility and the renewed application of fermentation technologies to produce single cell proteins. Research in Oman is focused on the utilization of marine protein …

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Improving The Quality Of Tiger Shrimp Penaeus Monodon Through Dietary Incorporation Of Algae As A Source Of Natural Pigment, Kunal Mondal, Subhra Bikash Bhattacharyya, Abhijit Mitra Apr 2025

Improving The Quality Of Tiger Shrimp Penaeus Monodon Through Dietary Incorporation Of Algae As A Source Of Natural Pigment, Kunal Mondal, Subhra Bikash Bhattacharyya, Abhijit Mitra

Journal of Agricultural and Marine Sciences

Tiger shrimp is one of the major candidate species for export oriented aquaculture which dominates the seafood market in regions of European Union, Japan and USA. Carotenoid content in seafood has now become one of the important criteria in determining the quality of edible product. Recent trends in supplementing fish diets with natural pigment source are an alternative to the utilization of expensive synthetic pigments. In this context, green algae Enteromorpha intestinalis was selected as a source of natural pigment for inclusion in the diet of tiger shrimp Penaeus monodon. Astaxanthin being an important category of carotenoid pigment was monitored …

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Composition, Quality And Health Aspects Of The Dromedary (Camelus Dromedarius) And Bactrian (Camelus Bacterianus) Camel Meats: A Review, Isam T. Kadim, Osman Mahgoub, Waleed Al-Marzooqi, Samera K. Khalaf, Gulzhan Raiymbek Apr 2025

Composition, Quality And Health Aspects Of The Dromedary (Camelus Dromedarius) And Bactrian (Camelus Bacterianus) Camel Meats: A Review, Isam T. Kadim, Osman Mahgoub, Waleed Al-Marzooqi, Samera K. Khalaf, Gulzhan Raiymbek

Journal of Agricultural and Marine Sciences

The dromedary and bactrian camels are good sources of high quality protein especially in areas where the climate adversely affects the survival of other livestock. The camel has unique physiological characteristics, including a great tolerance to high and low temperatures, solar radiation, water scarcity, rough topography and poor vegetation. Camels are mostly produced under traditional systems on poor levels of nutrition and are mostly slaughtered at old ages after completing a career in work, racing or milk production. In general, camel carcasses contain about 57% muscle, 26% bone and 17% fat with fore-quarters (cranial to rib 13) significantly heavier than …

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Development And Performance Evaluation Of A Solar Tunnel Date Dryer In Oman, Mohammad Ali Basunia, Hamid H. Al-Handali, Mohammed Issa Al-Belushi, Mohammad Shafiur Rahman, Osman Maghoub Apr 2025

Development And Performance Evaluation Of A Solar Tunnel Date Dryer In Oman, Mohammad Ali Basunia, Hamid H. Al-Handali, Mohammed Issa Al-Belushi, Mohammad Shafiur Rahman, Osman Maghoub

Journal of Agricultural and Marine Sciences

Taking into consideration the date harvesting and landholding capacities of the marginalized rural farmers in Oman, a 12 meter long and 2 meter wide tunnel was designed and constructed to dry about 180-200 kg of freshly harvested dates per batch. Half of the tunnel base was used as a flat plate air heating solar collector and the other half as a dryer. The drying air was forced from the collector region (South side) to the drying region (North side) of the half circled tunnel where the product is to be dried. The drying temperature could be easily raised by some …

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Habitat Preferences Of Juvenile Abalone (Haliotis Mariae Wood, 1828) Along The Dhofar Coast Of Oman And Implications For Conservation, Schalk Willem Petrus De Waal, Mohammed Balkhair, Ali Al-Mashikhi, Salem Khoom Apr 2025

Habitat Preferences Of Juvenile Abalone (Haliotis Mariae Wood, 1828) Along The Dhofar Coast Of Oman And Implications For Conservation, Schalk Willem Petrus De Waal, Mohammed Balkhair, Ali Al-Mashikhi, Salem Khoom

Journal of Agricultural and Marine Sciences

Surveys were conducted along the eastern Dhofar coast of Oman to investigate densities and habitat preferences of juvenile Haliotis mariae (< 3 cm SL). Average density was 0.62 m-2 (SD 0.56); average urchin density was 3.4 urchins m-2 (SD 3.9). Relationships between juvenile abalone densities and small boulders (<30 cm in diameter (Ø)) tested significant (p = 0.049), as did those between juvenile abalone and urchin densities (p = 0.031). Selectivity (w) and standardized (B) ratios quantifying the relative probability of selection by juvenile abalone for different categories of resource available were calculated. For the studied area B values tested significantly different for (p = 0.004) the different habitats, urchins, boulders <30 cm, 30> <50 cm, and >50 cm Ø, respectively. B values were highest for urchins (6 times that for small boulders), and for boulders <30 cm Ø (double that for boulders 30> <50 cm Ø). B values for boulder habitats decreased as boulder size increased. Urchin utilisation by juvenile abalone as shelter ranged between geographic areas from a minimum of 15.5% to a maximum of 47.6%. The proportion of total habitat that is preferred by more than 97% of juvenile abalone found, including urchins and boulders < 50 cm Ø, comprises 29% of surveyed substratum. While the role urchins play on wild juvenile H. mariae has not proved vital, it is definitely significant. Although juvenile densities are low and are not currently limited by the availability of suitable habitat, it is crucial to identify and conserve those microhabitats that support recruitment of H. mariae. The abundance of these areas should be among the criteria used in selecting protected conservation areas.

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Estimating Leaching Requirements For Barley Growth Under Saline Irrigation, Ahmed Al-Busaidi, Jaaman Rabeea, Mushtaque Ahmed, Salim Al-Rawahy Apr 2025

Estimating Leaching Requirements For Barley Growth Under Saline Irrigation, Ahmed Al-Busaidi, Jaaman Rabeea, Mushtaque Ahmed, Salim Al-Rawahy

Journal of Agricultural and Marine Sciences

The utilization of marginal water resources for agriculture is receiving considerable attention. The lands irrigated with saline water are required to reduce salt accumulations through leaching and/or drainage practices. A field experiment was carried out to investigate the effect of saline irrigation and leaching fraction on barley (Hordeum vulgare L.) growth. For this purpose highly saline water was diluted to the salinity levels of 3, 6 and 9 dS m-1 and applied by drip irrigation at 0.0, 0.15, 0.20 and 0.25 leaching fractions (LF). The results of the experiment showed that both quantity and quality of water regulated salts distribution …

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The In Vitro Activity Of A Range Of Natural Bioflavonoids Against Five Species Of Pathogenic Fish Bacteria, Gil Ha Yoon, Sarah Al Jufaili, Aliya Al Ghabshi, Nashwa Al Mazrooei Apr 2025

The In Vitro Activity Of A Range Of Natural Bioflavonoids Against Five Species Of Pathogenic Fish Bacteria, Gil Ha Yoon, Sarah Al Jufaili, Aliya Al Ghabshi, Nashwa Al Mazrooei

Journal of Agricultural and Marine Sciences

The in vitro antibacterial activity of thirty two plant-derived compounds (26 crude herbal extraction and 6 pure citrus-based bioflavonoids) were tested on five different species of aquatic bacterial pathogens (Aeromonas hydrophila, A. salmonicida, A. sobria, Edwardsiella ictaluri, and E. tarda) over a period of 72 hours at 22 oC. From the agar diffusion test, six pure citrus-based bioflavonoids (apigenin, catechin, hesperidin, morin, naringin and quercetin) appeared to impact on growth when used at concentrations ranging from 10 ppm - 1000 ppm. To confirm their effect on the growth dynamics of each bacteria, a 1000 ppm dose of the appropriate bioflavonoid …

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Relationship Between Body Composition And Performance Of Local Turkey, Rafh Mohammed Taher Khuleel Apr 2025

Relationship Between Body Composition And Performance Of Local Turkey, Rafh Mohammed Taher Khuleel

Journal of Agricultural and Marine Sciences

This study examined the relationship between carcass composition and performance traits of local turkey fed starter diet (30.2% protein, 2950 kcal/kg ME). At 8 week of age, male and female chicks were separated and reared in individual cages until 16 weeks of age. At the end of the experiment, the birds were slaughtered and carcasses were analyzed for chemical composition to predict chemical composition (moisture, ash, protein and fat) from performance traits such as initial body weight (g) at 8wk, final live body weight (g) at 16wk, daily weight gain (g), daily feed intake (g), feed conversion ratio, daily protein …

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Meat Production Potential Of Small Ruminants Under The Arid And Semi-Arid Conditions Of Pakistan, Mohamed Fatah Ullah Khan, Faisal Ashfaq Apr 2025

Meat Production Potential Of Small Ruminants Under The Arid And Semi-Arid Conditions Of Pakistan, Mohamed Fatah Ullah Khan, Faisal Ashfaq

Journal of Agricultural and Marine Sciences

Sheep and goat production is one of the major economic activities under the arid and semi-arid condition of Pakistan. The country has 53.8 million goats and 26.5 million sheep. The main purpose of raising these small ruminants in the country is meat production. The small ruminants share about 40% of total red meat produced in the country. It has been observed that in the last several years the overall per capita consumption of the animal food products is increasing. Overall annual growth rate of goats in Pakistan is 4%, which is the highest in Asia. Pakistan ranks third in Asia …

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An Assessment Of Omani Native Sheep Fiber Production And Quality Characteristics, Osman Mahgoub, Isam T. Kadim, Ahmed Al-Dhahab, Reynaldo B. Bello, Issa S. Al-Amri, Aisha A. Ambu Ali, Samera Khalaf Apr 2025

An Assessment Of Omani Native Sheep Fiber Production And Quality Characteristics, Osman Mahgoub, Isam T. Kadim, Ahmed Al-Dhahab, Reynaldo B. Bello, Issa S. Al-Amri, Aisha A. Ambu Ali, Samera Khalaf

Journal of Agricultural and Marine Sciences

Wool production and quality measurements were carried out on 100 Omani native female sheep (body weight 38.6 ± 5.5 kg; age 993 ± 488 d). Sheep were kept in partially shaded pens and fed ad libitum Rhodes grass hay (crude protein 8.83%) plus a daily amount of 200 g general ruminant concentrate (crude protein 16.5% DM). Animals were shorn once a year and samples were taken from the left mid-side site to determine fleece and fiber characteristics. The scanning electron microscope (SEM) was used to study the fine appearance of the wool fibers. A skin sample was used to study …

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Carcass Characteristics Of The Libyan Purebred Mahali Goat And Their Crosses With Damascus And Morcia Granada Goats, Abdelkareem E. Ahtash, Abdulla S. Biala, Aiad F. Magid, Hamed M. Marhoun Apr 2025

Carcass Characteristics Of The Libyan Purebred Mahali Goat And Their Crosses With Damascus And Morcia Granada Goats, Abdelkareem E. Ahtash, Abdulla S. Biala, Aiad F. Magid, Hamed M. Marhoun

Journal of Agricultural and Marine Sciences

This study was conducted to evaluate the carcass characteristics of Mahali (M), Damascus (D) and Morcia Granada (G) goats and their crosses. Live weight, carcass weight, dressing-out %, rib eye muscle area, non-carcass components and kidney fat were measured. The results showed significant superiority of Damascus goats in live weight (65.8 kg), carcass weight (34.3 kg), dressing-out %( 52.1%), rib eye muscle areas (22.7 cm²) over the Mahali and Morcia Granada goats. The crossbred group (1/2 M ҳ 1/2 D) was superior in live weight (50 kg), carcass weight (24.2kg), dressing-out %( 48.4%), and rib eye muscle area (21.2cm²) over …

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Effect Of Diet Quality And Housing On Water Status In Sudanese Desert Sheep And Goats, Hashim Mohamed Elhadi Apr 2025

Effect Of Diet Quality And Housing On Water Status In Sudanese Desert Sheep And Goats, Hashim Mohamed Elhadi

Journal of Agricultural and Marine Sciences

Two independent experiments were carried out using Sudanese Desert sheep and goats to investigate water metabolism (total body water, TBW and water turnover, WTO) and internal water compartments using radioactive water (tritium), under natural grazing conditions in a semi-desert area. The second trial was carried out on confined sheep, fed high (Lucerne) and poor quality (desert grasses) diets. The body weights, rectal temperature and water parameters were monitored in both trials and species under the Sudanese summer conditions. The grazing animal’s body weights were reduced compared to confined ones. Hyperthermia was pronounced in goats (9%) compared to sheep (6%). The …

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Live Weight Changes And Their Relationship With The Ovarian Status Of Maiden Fat-Tailed Barbarine Ewes, Imēne Ben Salem, Mourad Rekik, Mohammed Ben Hamouda, Narjess Lassoued Apr 2025

Live Weight Changes And Their Relationship With The Ovarian Status Of Maiden Fat-Tailed Barbarine Ewes, Imēne Ben Salem, Mourad Rekik, Mohammed Ben Hamouda, Narjess Lassoued

Journal of Agricultural and Marine Sciences

The current study assessed the effect of the pattern of live weight change on the ovarian function of maiden Barbarine ewes at approximately 1 year of age. For this purpose, a total of 171 weaned ewe lambs (mean live weight ± s.d. 34.7±3.07 kg and mean age ± SD 196±10 days at weaning) were selected for the experiment. Adjustment of live weight variation was used. Based on the slope of the curve, animals were grouped into three classes LWCI (n=46), LWCII (n=91) and LWCIII (n=34) with live weight loss being highest in LWCI and lowest in LWCIII. Following laparoscopy at …

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Transport Modeling Analysis To Test The Efficiency Of Fish Markets In Oman, Khamis S. Al-Abri, Hemesiri Kotagama, Andrew Palfreman, Houcine Boughanmi Apr 2025

Transport Modeling Analysis To Test The Efficiency Of Fish Markets In Oman, Khamis S. Al-Abri, Hemesiri Kotagama, Andrew Palfreman, Houcine Boughanmi

Journal of Agricultural and Marine Sciences

Oman’s fish exports have shown an increasing trend while supplies to the domestic market have declined, despite increased domestic demand caused by population growth and income. This study hypothesized that declining fish supplies to domestic markets were due to inefficiency of the transport function of the fish marketing system in Oman. The hypothesis was tested by comparing the observed prices of several fish species at several markets with optimal prices. The optimal prices were estimated by the dual of a fish transport cost- minimizing linear programming model. Primary data on market prices and transportation costs and quantities transported were gathered …

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Profitability Analysis Of Selected Farms In The Batinah Region Of Oman, Slim Zekri, Fahad A. Al Said, Iqrar A. Khan Apr 2025

Profitability Analysis Of Selected Farms In The Batinah Region Of Oman, Slim Zekri, Fahad A. Al Said, Iqrar A. Khan

Journal of Agricultural and Marine Sciences

The agricultural sector of Oman represents less than 2% of the total GDP and uses 88% of the fresh water. Several decision makers are questioning whether the agricultural activity in the Sultanate of Oman can be sustained and if so what type of crops should be encouraged. More than 53% of the agricultural cropped area is situated in the Batinah coastal area where farming is exclusively based on groundwater pumping. A sample of 49 market-oriented farms from the Batinah region was surveyed during 2006. Four types of farms were considered. Results showed that the most profitable farms are mixing fodder …

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Influence Of Alternate Bearing On Leaf And Fruit Mineral Composition At Different Developmental Stages Of Date Palm Fruits, M.O. El-Mardi, A.E. Pillay, J.R. Williams, C.S. Bakheit, S.M. Hassan, M. Al-Hadabbi, A. Al-Hamdi Apr 2025

Influence Of Alternate Bearing On Leaf And Fruit Mineral Composition At Different Developmental Stages Of Date Palm Fruits, M.O. El-Mardi, A.E. Pillay, J.R. Williams, C.S. Bakheit, S.M. Hassan, M. Al-Hadabbi, A. Al-Hamdi

Journal of Agricultural and Marine Sciences

Samples of leaflets and fruits at different stages were collected from 6 “on-palms” and 6 “off-palms” (15-16 years) of the Fard Cultivar. Samples were dried, ashed and digested. Macro and micronutrient concentrations of K, Ca, Mg,Na, Fe, Zn, Cu and Mg were determined by ICP-AES and N was measured by Kjeldhal method. Significant changes in the elemental concentrations of leaf and fruit occurred between Kimri (green color) and Bisir (yellowish-red color) development stages. Potassium and Mg concentration was reduced in leaf and fruit. Calcium and Na were reduced in the fruit and increased in the leaf. Iron, Zn and Mn …

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Prediction Of Composition Of Broiler Chicken Excreta Using Near-Infrared Reflectance Spectroscopy, I. T. Kadim, W. Al-Marzooqi, O. Mahgoub, K. Annamalai Apr 2025

Prediction Of Composition Of Broiler Chicken Excreta Using Near-Infrared Reflectance Spectroscopy, I. T. Kadim, W. Al-Marzooqi, O. Mahgoub, K. Annamalai

Journal of Agricultural and Marine Sciences

Near-infrared reflectance spectroscopic (NIRS) calibrations were developed for the prediction of the content of dry matter (DM); nitrogen (N), ether extract (EE), neutral detergent fibre (NDF), acid detergent fibre (ADF), gross energy (GE), calcium (Ca) and phosphate (P) in broiler excreta samples. The chemical composition of broiler excreta was determined by the conventional chemical analysis methods in the laboratory and compared with NIRS. Excreta samples (n = 72) were oven dried (60 oC) and analyzed for DM, N, EE, NDF, ADF, GE, Ca and P. The determined values (mean ± SD) were as follows: DM: 31.46 ± 7.65 (range:19.14 - …

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