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Topic Review
The Role of Seaweed in Aquaculture Production
Seaweed, also known as macroalgae, represents a vast resource that can be categorized into three taxonomic groups: Rhodophyta (red), Chlorophyta (green), and Phaeophyceae (brown). They are a good source of essential nutrients such as proteins, minerals, vitamins, and omega-3 fatty acids. Seaweed also contains a wide range of functional metabolites, including polyphenols, polysaccharides, and pigments. The nutritional and functional properties of seaweed attest to their potential to be incorporated into aquafeed to safeguard fish growth and health as the global demand for fish and seafood products rapidly increases. 
  • 473
  • 14 Dec 2023
Topic Review
The Application of Potassium Diformate in Aquaculture
Potassium diformate (KDF) is an organic acid salt. It is a dimer formed through hydrogen bonding between one molecule of formic acid and one molecule of potassium formate. The chemical formula of KDF is HCOOH·HCOOK, with a molecular weight of 130.14. It is a white or slightly yellow crystalline powder with no discernible pungent odor. KDF dissolves in water and exhibits a pronounced hygroscopic nature. Its aqueous solution is acidic and remains stable under acidic conditions, while it decomposes into formate and formic acid under neutral or slightly alkaline conditions. Compared with formic acid, KDF overcomes the irritability, corrosiveness, and instability of formic acid. Therefore, KDF is a more suitable additive in feed, providing a safer and more stable solution in maintaining the balance of microbial communities in aquatic animals.
  • 77
  • 07 Mar 2024
Topic Review
Swimbladder Function in Yellow Eels
Eels use the swimbladder for buoyancy control. The ductus pneumaticus connecting the esophagus with the swimbladder is closed soon after initial opening of the swimbladder in the glass eel stage, so that eels are functionally physoclist. Subsequent filling of the swimbladder is achieved by activity of gas gland cells in the swimbladder epithelium and countercurrent concentration in the rete mirabile.
  • 279
  • 27 Mar 2023
Topic Review
Sustainability Potentials of Integrated Multi-Trophic Aquaculture
Integrated multi-trophic aquaculture (IMTA) systems integrate the cultivation of species from different trophic levels. Uneaten feed, solid wastes, and dissolved nutrients are turned into harvestable and healthy food, making IMTA a driver for ecologically sustainable aquaculture. Its wider sustainability potentials arise from social, environmental, and economic sustainability enhancement options. 
  • 396
  • 30 Nov 2022
Topic Review
Small Indigenous Fish in Bangladesh
Peoples can readily and affordably obtain small indigenous fish species (SIS), with a maximum length of 25 cm, that can be found in niches in small bodies of water (such as canals, ponds, wetlands, streams, etc.). SIS contribute valuable and significant macro- and micronutrients in Bangladesh. SIS are excellent suppliers of vitamins and minerals. The main micronutrients are copper, iodine, iron, selenium, chromium, and zinc, which can help prevent mineral deficiency and enzymatic response in the human body. SIS, such as the mola (Amblypharyngodon mola), cotio (Osteobrama cotio), darkina (Esomus danricus), etc., are easily digestible by the human gut. Nutrients of these fish are quickly accessible by the intestine. These fish are comparatively cheap and easy to capture and promote the presence of particular vitamins in SIS, including A, D, E, and K, as well as vitamin B components. 
  • 939
  • 10 Mar 2023
Topic Review
Shrimp Farming in the Philippines
Aquaculture serves the employment and food security needs of most Asian coastal countries, such as Bangladesh, China, India, Indonesia, the Philippines, Thailand, and Vietnam, which are all aquaculture-reliant countries with large aquaculture sectors. Aquaculture is a major driver of socioeconomic development in poor rural and coastal communities, particularly in Asia, and it relieves the pressure on, and helps to maintain the sustainability of, wild-caught species from rivers, lakes, and oceans, as it provides for the shortfalls of capture fisheries.  This industry has become a major source of food protein and it is predicted that it will support the seafood production as a sustainable alternative to wild-caught fish.
  • 13.7K
  • 16 Mar 2022
Topic Review
Salmonids' Immune Response to Myxozoan Parasite Myxobolus cerebralis
Salmonids are affected by the economically significant whirling disease (WD) caused by the myxozoan parasite Myxobolus cerebralis. In the past, it was endemic to Eurasia, but it has now spread to different regions of North America, Europe, New Zealand, and South Africa. Among salmonids, rainbow trout is considered the most highly susceptible host. Upon entering to the host’s body, the parasite invades the spine and cranium, resulting in whirling behaviour, a blackened tail, and destruction of cartilage. The disease is characterized by the infiltration of numerous inflammatory cells, primarily lymphocytes and macrophages, with the onset of fibrous tissue infiltration.
  • 98
  • 01 Mar 2024
Topic Review
Reactive Nitrogen Flows in Bangladesh’s Agriculture Sector
Nitrogen (N) fertilizer use is the largest in the crop sector, an important sector, where current annual consumption is 1190 Gg. The present combined annual Nr production from crop, fishery, and livestock sectors is ~600 Gg, while emissions of nitrous oxide (N2O), a potent greenhouse gas, are ~200 Gg. Poor N management results in Nr leaking into the environment, which has increased approximately 16-fold since 1961. One potential consequence is the disruption of ecosystem functioning. The balanced tradeoff between food production and reducing Nr input needs to be achieved. One solution to reducing unutilized reactive N (Nr) may be a holistic approach that optimizes N application rates and incorporates waste of one subsector as an input to another applying the principle of the circular economy. 
  • 933
  • 06 Jan 2022
Topic Review
Optical Sensors Based on Plasmonic Techniques in Aquaculture
Aquaculture is an expanding economic sector that nourishes the world’s growing population due to its nutritional significance as a source of high-quality proteins. However, it has faced severe challenges due to significant cases of environmental pollution, pathogen outbreaks, and the lack of traceability that guarantees the quality assurance of its products. Such context has prompted many researchers to work on the development of novel, affordable, and reliable technologies, such as the sensors based on the plasmonic technique are surface plasmon resonance (SPR), localised SPR, and fibre-optic SPR.
  • 497
  • 11 Jan 2023
Topic Review
Morphology of the Spleen in Oreochromis niloticus
The spleen is a separate organ of the teleost, playing an essential role in immune reactions. The morphology of the spleen is different from the fish species. Little knowledge about the spleen structure and the blood splenic barrier (BSB) in Nile tilapia has been reported. The present study showed that the spleen of Nile tilapia could be portioned into three subregions, and the BSB lay in the middle layer, composed of the cuboidal-shaped endotheliocytes and the surrounding reticular fibers of the ellipsoid capillaries. Our results enriched the research of immune tissues and system in tilapia and provided reference for the study of spleen in other fish species.
  • 1.4K
  • 01 Nov 2021
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