Check out what is new in Aquaculture
Find the best technical articles, forums, and videos on Aquaculture at Engormix. Enter now and interact with the world's largest agricultural social network.
Introduction Hematological parameters of fish blood are useful tools that aid in the study immuno-potentiators. Such tests are general but not conclusive and must be correlated with biochemical tests of the subject. The classification of leucocytes as in the vertebrates has been done following morphological criteria where by various groups can be distinguished such as lymphocytes, granulocytes and macrophages (Ellis, 1981). Dominguez et al. (2004) confirmed that elevating...
Comments : 0
Recommendations: 1
Introduction Penzlin (1977) cited that blood constituents of fish are variable than those of the terrestrial animals. Abdelhamid (1991) argumenta for the variation between fish and terrestrial animals to the huge number of fish species (ca. 25.000) and strains (40.000) in comparison with the mammalian species (ca. 4.500). Additionally, Abdelhamid (2009) cited that fish are variable in their morphology, biology, anatomy, physiology, reproduction,...
Comments : 0
Recommendations: 2
1. Introduction Mycotoxins are natural contaminants commonly found in plant-derived foodstuffs, mainly cereals and their by-products. Since these raw materials are added as ingredients in feed formulation for different animal species, including cultivated fish, the risk of mycotoxin contamination in feed for aquaculture has increased, thus introducing contaminants (i.e., mycotoxins), which were not previously identified in fish tissues [1]. Diverse studies reported mycotoxin...
Comments : 0
Recommendations: 0
INTRODUCTION Free radicals are responsible for aging and causative agents of various human diseases. Antioxidant compounds play an important role in various fields such as medical field (to treat cancers, cardiovascular disorders, and chronic inflammations), cosmetics (anti-aging process) and food industries (food preservative) [1]. Seaweeds contain reactive antioxidant molecules, such as ascorbate and glutathione (GSH) when fresh, as well as secondary metabolites including...
Comments : 0
Recommendations: 0
Introduction In Egypt, shrimp culture has fluctuated progress. Although shrimp culture is profitable, but shrimp disease is still one of the major problems. Shrimp’s origin is from the eastern Pacific waters. In practice of shrimp culture, shrimp farmers often use their habit and experience, including the harvest time ( Nour et al ., 2004). Litopenaeus vannamei is the most important penaeid shrimp species farmed earth ( Alcivar- Warren...
Comments : 1
Recommendations: 2
Global demand for seafood is growing at an unprecedented rate. By 2030, an additional 41 million tons of fish per year will be needed to maintain current levels of seafood consumption. Aquaculture is the solution, and soy-based feed is a sustainable and healthful alternative to traditional fish-based aquafeeds.
In particular, grouper has been identified as a desired fish in the live reef food fish trade in Southeast Asia due to their desirable taste, hardiness in captivity, efficient...
Comments : 0
Recommendations: 0
INTRODUCTION The increasing global population and the limiting global capture fisheries undeniably increase the demand of aquaculture. On the other hand, those will also bring about limitation to aquaculture expansion in particular of land and water utilization. Therefore, productivity enhancement in term of total production per input used becomes one of the major priority in the development of aquaculture (Avnimelech et al., 2008) . Aquaculture is the culture of...
Comments : 0
Recommendations: 0
.jpg&w=3840&q=75)
Amir-Antoine Khalil (INVE Aquaculture) gives an overview of nurseries around the world, and discusses infrastructure and models....
Comments : 3
Recommendations: 2
Introduction Clarias gariepinus , a major freshwater fish in Nigeria, is of growing economic value in African aquaculture industry [8, 9, 13]. According to Macharia et al. [11], the hatching rates of Clarias gariepinus eggs in many hatcheries in Africa are erratic, ranging from 8.0 to 70%, depending on the degree of sophistication of the management of the hatcheries. Since hatchery production is the...
Comments : 0
Recommendations: 0
1. Introduction Nanotechnology involves the characterization, fabrication of structures, materials or particles that have at least 1–100 nm in length. The field of nanotechnology is one of the most active research areas in modern materials science. Nanoparticle research is an ever-increasing scientific research interest, especially over the last couple of decades. The most effectively studied nanoparticles today are those made from noble metals, in particular Ag, Pt, Au...
Comments : 0
Recommendations: 2
Introduction Much information is given ( Willem Van Cotthem, 2012 ) about Opuntia ficus-indica as an aloes. Therefore, the aim of the present study was evaluating the possibility of using powders of either fruits' skins or leaves of the Egyptian Teen Shoky as replacers for dietary corn in all-males mono-sex Nile tilapia, Oreochromis niloticus diets and their effects on fish performance for 75 days. This is an attempt to ameliorate feed costs by...
Comments : 1
Recommendations: 0
Introduction Fish are the most feed converser than all terrestrial animals' species. So, the world population consumes 17% of their food protein from fish. Nowadays, aquaculture production in Egypt reached to 80% of the total local fish production (GAFRD, 2016 and Abdelhamid, 2019b). Milstein and Svirsky (1996) reported that an appropriate-adequate fish density will utilize the available resources efficiently and fish environment relationships and minimize the antagonistic ones....
Comments : 0
Recommendations: 0
Functional yeast proteins supplementation in reduced fishmeal diets for orange-spotted grouper ( Epinephelus coioides ) reduces gut inflammation, improves villi structure and increase survival after Vibrio harveyi disease...
Comments : 5
Recommendations: 1
In recent years, the global aquaculture industry has overcome many obstacles, especially those related to disease outbreaks, environmental regulations and market volatility. In future, however, increasing pressures and challenges are anticipated due to water scarcity, wild stock overfishing, antibiotic resistance and climate...
Comments : 0
Recommendations: 2
INTRODUCTION Nanotechnology and nanoscience are the study of production, manipulation, and application of materials ranging in size from less than a micron to that of individual atoms [1]. The major key aspect of nanotechnology involves in the development of rapid and reliable experimental protocols such as biological and chemical processes for the synthesis of nanomaterials over wide range of chemical compositions, sizes, high monodispersity, as well as large-scale production...
Comments : 0
Recommendations: 0
.jpg&w=3840&q=75)
Olivier Decamp (INVE Aquaculture) gave a presentation about the industry challenges and the contribution of probiotics in the increased production of shrimp, during the CIAC Trade-show....
Comments : 4
Recommendations: 3
INTRODUCTION Like other animal production systems, aquaculture has developed into a highly globalized trade-dependent industry, therefore as global fish farming continues to increase, the need for formulating nutritionally balanced and cost-effective diets with high-quality protein source is important (Furuya et al., 2010). In fact, nutritional value of protein in the diet for fish is influenced by its amino acids(AA) compositions, therefore, the quality...
Comments : 0
Recommendations: 0
Introduction Nano particles exhibit unique biological, physical and chemical properties based on specific characteristics such as shape, size, distribution and surface morphology. Synthesis of nano particles through biochemical routes, using plant and algal extracts as reducing and capping agents, has received special attention among others, due to maintaining an aseptic environment during the synthetic process [1-7]. Therefore, medicinal plants and algae having well established...
Comments : 0
Recommendations: 0
Introduction Press and Evensen (1999) mentioned that species variation in the morphology of the immune system is to be expected, given the large number and diversity of species within the teleost fishes. Several external and internal factors can influence the activity of innate immune parameters. Temperature changes, handling and crowding stress can have suppressive effects on innate parameters, whereas several food additives and immunostimulants can enhance different innate...
Comments : 0
Recommendations: 1
INTRODUCTION Aquaculture is the fastest growing source of animal protein for humans. However, as this industry continues to develop, several inherent challenges will arise. Foremost is the need for increased production of suitable and sustainable feeds. Aquaculture has long been criticized for ‘‘using fish protein to make fish protein’’ ( Naylor et al., 2009 ). This ‘‘fishmeal trap’’ ( New & Wijkström, 2002 )...
Comments : 5
Recommendations: 2
