Recursos de colección

Aquatic Commons (38.811 recursos)

The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.

Subject = Aquaculture

Mostrando recursos 1 - 20 de 107

  1. Capacity building and training requirement for effective fisheries and aquaculture extension in Nigeria

    Sanni, A.O.; Olowosegun, T.; Sule, A.M.; Bwala, R.L.; Onimisi, H.U.
    This paper examines the importance of capacity building and training requirement for the benefit of fisheries and aquaculture extension in Nigeria. It involves the analysis of secondary data bothering on the management of agricultural extension in Nigeria over time vis-avis various agricultural development programmes in the past in which fisheries and aquaculture extension was apparently de-emphasized in favour of crop and livestock agriculture. It is therefore recommended as a way forward that a favorable reform in the Nigerian agricultural extension system will be a necessary avenue to put fisheries and aquaculture extension in proper perspective for effective service delivery which...

  2. Diseases associated with livestock integrated fish farming in Nigeria: a review

    Nyaku, R.E.; Okayi, R.G.; Ataguba, G.A.; Mohammed, A.
    Just like other animals and humans, fishes are prone to diseases and predation. Diseases can be caused by one and/or combination of any of the following agents e.g. bacteria, fungi, viruses and parasites. Diseases have become a primary constraint to aquacultural development, which may affect the achievement of a desired impact for rapid development of fish culture in Nigeria. Apart from causing mortalities, they also cause loss of production quality, reduced growth, reduced fecundity, loss due to control measures and loss due to social factors associated with the farmer. This review has discussed the diseases that are associated with integrated...

  3. SAMUDRA Report No.78, January 2018

  4. An Analysis of the consumer market for carp and carp products in Iran

    Salehi, H.
    In Iran, carp is widely sold and used in its fresh, although a range of added value products may also be observed. The common carp and the three Chinese species are often reared in polyculture ponds. Since, the 1970S carp farming has spread along the Caspian Sea coasts, followed by other provinces, and farmed production reached a peak in 2004 with production of more than 60,000 tonnes. Rapid expansion of carp cultivation has been followed by marketing problems in recent years. Consumer and market-related data to develop effective marketing strategies are essential to the growth of the carp farming industry...

  5. Study on physico-chemical characteristics of Azad dam reservoir (Sanandaj) in order to fisheries activities

    Narollahzadeh Saravi, H.; Parafkandeh, F.; Fazli, H.; Mirzaei, R.; Hosseinpour, H.; Afraei, M.A.; Nasrollahtabar, A.; Makhlough, A.; Vahedi, N.
    Dam reservoirs have important rules in aquaculture and fish farming in many countries. In this regard, water samples of Azad Dam reservoir (Sanandaj) were collected at five stations from July 2015 to June 2016. Then, the results of 18 physico-chemical parameters were compared with the aquaculture standards and thresholds. Results showed that thermocline and oxycline was started from June and they vanished in December. Maximum level of thermal and oxygen stratified were registered during August and June, respectively. Mean of the most physico-chemical parameters were significantly different between surface and bottom layers (T-Test, p<0.05). Mean of temperature, dissolved oxygen, total...

  6. Short communication: a case report of Branchiomyces infection in common carp (Cyprinus carpio) from Iran

    Ebrahimzadeh Mousavi, H.A.; Khosravi, A.R.; Firouzbakhsh, F.; Mokhayer, B.; Sasani, F.; Mirzargar, S.S.; Rostami, M.
    This study was carried out during summer 2002, to isolate the Branchionzyces spp., and to show the histopathologicat changes of gill lesions of Cyprinids fish from Iran. Branchiomyces spp. from lesions of common carp was isolated. The histopathological findings include congestion, hyperplasia, fusion, and telangiectasis of secondary lamella and also hemorrhage in primary lamella were seen. Infiltration of inflammatory cells around the blood vessels. ‘vere also observed. -I his is the first report of isolation of Branchiomyces spp. from common carp in Iran.

  7. Determination of some seminal plasma indices, sperm density and sperm motility in the Persian sturgeon Acipenser persicus

    Alavi, S.M.H.; Mojazi Amiri, B.; Cosson, J.; Karami, M.; Abdoulhay, H.A.; Pourkazemi, M.; Akhoundzadeh, M.A.
    Some biological aspects of semen were investigated in the Persian sturgeon, Acipenser persicus, by determination of seminal plasma indices (ionic composition and osmolality), sperm density and their relationships with sperm motility. The osmolality of seminal plasma ranged from 42.00 to 111.00 mOsmol Kg-1. The concentrations of Sodium (Na+), Potassium (K+), Chloride (Cl-), Calcium (Ca2+) and Magnesium (Mg2+) ions were 62.44±6.82, 6.92±0.88, 21.11±5.41, 0.79± 0.03 and 0.52±0.03mM L-1, respectively. The sperm density was 8.34±1.38×109 spz/ml. The Sodium/Potassium and Calcium/Potassium ratios were 9.02 and 0.13, respectively. The following significant positive correlations were found between seminal plasma indices; osmolality - Cl- (r2= 0.492,...

  8. A histological study on the development of the digestive tract of Caspian salmon, Salmo trutta caspius (Kessleri), from hatching to parr stage

    Mojazi Amiri, B.; Bahrekazemi, M.; Pousti, I.; Vilaki, A.S.
    Histological development of digestive tract of the Caspian salmon, Salmo trutta caspius, from hatching to 6 month post-hatching was studied using light microscope. The digestive tract of newly hatched larvae was a simple, undifferentiated tube which continued from mouth to anus. In 10 days post hatching larvae, the alimentary canal became more differentiated and secretion was started activity, with appearance of goblet cells in epithelium of the mouth, pharynx and esophagus. A thin layer of neutral mucopolysaccharid components covered the digestive tract's epithelium in this stage. At the onset of exogenous feeding (25 days post hatch, dph, at 70C), the...

  9. Caspian Sea gammarus (Pontogammarus maeoticus) as a carotenoid source for muscle pigmentation of rainbow trout (Oncorhynchus mykiss)

    Ahmadi, M.R.; Safi, Sh.; Bjerkeng, B.; Gerami, A.; Ranaii Siadat, S.O.; Khodarahmi, R.
    The red coloration of rainbow trout muscle is an important quality criterion. Duplicate groups of rainbow trout (Oncorhynchus mykiss; initial weight of 200±10g) were fed diets either supplemented 0 (control), 0.5, 2, or 4%, of the Caspian Sea gammarus (Pontogammarus maeoticus) respectively as a prospective alternative carotenoid source. The feeding trial lasted for 39 days. No significant differences (p>0.05) in specific growth rate (SGR), or condition factor (CF) were found between treatments. Carotenoid concentrations were determined in the dorsal region and the Norwegian Quality Cut (NQC). The correlation between mean total carotenoid content of the Norwegian quality cut per treatment...

  10. Using computer assisted sperm analysis (CASA) to monitoring the effects of zinc and cadmium pollution on fish sperm

    Ebrahimi, M.
    Since the quality of sperm is affected by water industrial or agriculture pollution, sperm motility was measured as a sensitive and accurate bioindicator of water quality. In this study, sperm motility was measured by a computer assisted sperm analysis after 24 hours exposure of sperm to different concentration of heavy metals (Cadmium and Zinc). The results show that the sperm motility was not related to the duration of exposure but to the metals concentration ration. The concentration of 1000ppm zinc or 2000ppm Cadmium could have adverse effect on sperm motility.

  11. Effects of different levels of protein, energy and their interaction on growth factors of Indian white shrimp (Fenneropenaeus indicus) of different sizes

    Alaf Noveyrian, H.; Vijaya Gopal, P.
    Three experiments of 28 days duration were conducted in three size groups (<1g, 1-5g and 5-10g) of Indian white shrimp, Fenneropenaeus indicus, to evaluate the appropriate protein: energy (GE) ratios in their diets. A common ingredient mixture consisting of fish meal, shrimp meal, ground nut oil cake, cholesterol, lecithin, vitamins and minerals blended with chicken egg albumin, tapioca flour and cellulose (filler) to formulate nine feeds with protein levels of 35%, 40% and 45% and GE levels of 380, 420 and 460 kcal/100g at each level of protein (i.e. 35:380, 35:420, 35:460; 40:380, 40:420, 40:460 and 45:380, 45:420 and 45:460)....

  12. Identification of identification of Hepatopancreatic Parvo-like Virus (HPV) in cultured Penaeus semisulcatus from the Islamic Republic of Iran

    Afsharnasab, M.; Shariff, M.; Hassan, M.D.; Wang, Y.G.
    During the period from August 1997 to March 1998, two thousand samples of cultured Penaeus semisulcatus postlarvae and subadults were collected from five hatcheries and 20 grow out farms distributed in three provinces along the costs of Persian Gulf and the Oman Sea. Based on growth signs, LM and TEM histopathology, Hepatopancreatic Parvo-like Virus (HPV) were identified from the samples. The HPV particles most often appeared in spherical, but occasionally in angular forms. The particles in hepatopancreatocyte sections, averaged 22-24mm in diameter.

  13. Kepadatan kerang lumpur Anodontia edentula Linnaeus, 1758 kaitannya dengan parameter lingkungan di Kabupaten Muna

    Rochmady, R; Omar, Sharifuddin Bin Andy; Tandipayuk, Lodewyck S.
    The research aims to analyze the density of mud clams Anodintia edentula Linnaeus, 1758 relation to environmental parameters, covering organic material content and composition of sediment in Muna regency. Research carried out in coastal Lambiku and Tobea Island. The sample collection begins in March until May 2011, intervals collection example once a month for three months. A collection of mud clams example in a plot trasek (Line Transect Plot) is determined (purposive sampling). A plot observation based on three categories, Plot I near coast, Plot II the transition and Plot III far from the beach, intervals 50m each a plot...

  14. Struktur dan komposisi jenis mangrove Desa Bonea dan Kodiri, Kabupaten Muna, Sulawesi Tenggara

    Rochmady, R
    The condition of mangrove ecosystem in Kodiri village is in good condition, because the management effort has been done by indigenous community self-supporting. Mangrove in the village of Bonea classified as damaged, due to the high utilization rate, especially the taking of firewood. The research aimed to analyze the structure and composition of mangrove vegetation in Bonea village, Lasalepa district and Kodiri village, Lohia district. Relative density parameters, relative closure, relative closure type and Important Value Index (INP) are used as indicators to describe the structure and composition of mangrove vegetation. The study was conducted from June to December 2014...

  15. Aspek bioekologi kerang lumpur Anodontia edentula (Linnaeus, 1758) (Bivalvia: Lucinidae) di perairan pesisir Kabupaten Muna

    Rochmady, R
    The study was conducted in Tobea Island and coastal Lambiku for analysis: 1) biology aspects, 2) environmental aspects. Data were analysed to see the difference in the two locations using t-test analysis (student) and descriptive. The analysis showed that mangrove ecosystems in Tobea island, the closure of the (51%) and density (1.000 trees ha-1), in coastal Lambiku close (43%) and density (944 trees ha-1). Biological aspects of the growth population of mudclams in the Tobea Island (L∞= 65.6 mm, K= 1.18) lower than in coastal Lambiku (L∞= 73,75 mm, K= 0.73). Results of the t-test (student), morphometric characters of mudclams...

  16. Adoption of fish farming practices by women in Lagos State

    Yarhere, M.
    The involvement of women in aquaculture in Lagos State was studied. One hundred and fifty copies of the questionnaire were administered to women fish farmers, randomly selected from three local government areas of Lagos state. These were Ojo, Ibeju Lekki and Epe local government areas of Lagos State. The study revealed that 52% of the women adopted concrete pond system, 24% adopted dug-out or earthen pond system, 10% fibre glass tanks and 14% adopted Water Recirculatory/Flow-through system of fish farming. Other fish farming technologies that were included in this study were: stocking rates, feeding regimes and feed types, water quality...

  17. Evaluation of pawpaw leaf-based diets (Carica papaya) on growth and survival of African catfish (Clarias gariepinus) fingerlings reared in plastic bowls

    Akinwande, A.A.; Alatise, P.S.; Ayanlude, F.V.
    200 fingerlings of African catfish (Clarias gariepinus) of average weight of 22.8~c0.04g were used to investigate the nutritive value of Pawpaw (Carica papaya) leaf-based diets. Five (5) isocaloric and iso-nitrogenous diets containing fishmeal protein at a rate of 0%, 25%, 50%, 75%, and 100% along with the pawpaw leaf were formulated. The diet without the pawpaw leaf meal serves as the control. The fish fingerlings were fed at 5% body weight per day for 56 days in plastic bowls. It was observed at the end of the experiment that pawpaw leaf meal was suitable as a protein supplement when incorporated...

  18. Recent developments on non-conventional fish culture media in Nigeria

    Olukunle, O.A.
    Isolated successes have been recorded in fish farming in some African countries with observable potentials in Nigerian marine waters. In Nigeria, aquaculture is a recent development and it has been practised in conventional culture media, which are land borne while non conventional ones are mainly water borne. The need to use non-conventional culture media is based on the constraints encountered by using the conventional culture media. The fish farms constructed in the 1950's were constructed in isolated and far away home locations hence, theft was rampant in these poverty stricken localities. Cultural land acquisition practices entrenched in the society also...

  19. Composition and abundance of macro-invertebrate community in earthen ponds of Akscoa Fish Farm Oruk Anam L.G.A., Akwa Ibom State, Nigeria

    Unanam, A.E.; Udoinim, M.M.; Effiong, H.S.
    Composition and abundance of macro-invertebrates, in Akwa Ibom State College of Agriculture, Fish Farm in UrukAnam Local Government Area, Nigeria, was studied from (December 2005 to May, 2006). Collections of samples were made with benthic net at weekly intervals. Stocked and unstocked ponds were selected for the study. The stocked ponds had 122 individuals macro invertebrates while unstocked pond had 160 number of individuals. The two ponds were dominated by Diptera followed by Coleoptera with single individual species. Groups which are regarded as clean water fauna were absent in both ponds. Generally, the ponds were poor in terms of number...

  20. Effects of Daphnia magna and Artemia nauplii on growth performance in Persian sturgeon Acipenser persicus larvae

    Kamali, A.; Shabanpour, B.
    This study was carried out in a completely randomized design 3×3×4 factorial arrangement in three periods of rearing in spring 1997. Density of 300 larvae was assigned for each oval tank with 0.1m2 surface area, 30cm deep, a volume of 20lit and 0.25 lit/min of water flow per minute at Shahid Rajaie fish breeding and culture center in Sari, north of Iran. The fries were divided into three groups according to their feeding regimes and fed with each of Artemia or D. magna separately, and mixture of the two (50% Artemia+50% Daphnia) in ratioes of 80, 100 and 120% of...

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