The Role Of Seaweeds For Sustainable Aquaculture Development

2018 ◽  
Author(s):  
Alejandro. H. Buschmann
Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2167
Author(s):  
Ehsan Ahmadifar ◽  
Hamideh Pourmohammadi Fallah ◽  
Morteza Yousefi ◽  
Mahmoud A. O. Dawood ◽  
Seyed Hossein Hoseinifar ◽  
...  

The crucial need for safe and healthy aquatic animals obligates researchers in aquaculture to investigate alternative and beneficial additives. Medicinal herbals and their extracts are compromised with diverse effects on the performances of aquatic animals. These compounds can affect growth performance and stimulate the immune system when used in fish diet. In addition, the use of medicinal herbs and their extracts can reduce oxidative stress induced by several stressors during fish culture. Correspondingly, aquatic animals could gain increased resistance against infectious pathogens and environmental stressors. Nevertheless, the exact mode of action where these additives can affect aquatic animals’ performances is still not well documented. Understanding the mechanistic role of herbal supplements and their derivatives is a vital tool to develop further the strategies and application of these additives for feasible and sustainable aquaculture. Gene-related studies have clarified the detailed information on the herbal supplements’ mode of action when administered orally in aquafeed. Several review articles have presented the potential roles of medicinal herbs on the performances of aquatic animals. However, this review article discusses the outputs of studies conducted on aquatic animals fed dietary, medicinal herbs, focusing on the gene expression related to growth and immune performances. Furthermore, a particular focus is directed to the expected influence of herbal supplements on the reproduction of aquatic animals.


<em>Abstract.</em>—Aquaculture development in the United States continues its expansion from freshwater into coastal and nearshore oceanic environments. As it does so, the selection of species to culture and the location of culture operations are generating much debate about the role of government entities, especially agriculture and conservation agencies, in the management of this development. Many in the industry argue that regulations are already too onerous, subsidies are too few, governmental encouragement is too little, and that the best way to correct these problems is to place all control over the development in governmental agriculture agencies. Others argue that the potential environmental impacts of aquaculture could be so adverse, or at least so uncertain that conservation agencies need to impose even more controls. This debate occurred in Texas in the 1980s as private aquaculture sought to increase the culture of nonindigenous species, in both private and public waters. The potential effects on native species in public waters led to legislation that attempted to balance economic development with environmental safeguards. However, only Texas was affected by the statute and subsequent regulations. Since the potential environmental affects of aquaculture development will undoubtedly cross local, state, and tribal boundaries, it is now felt by many that the regulation of the species cultured and sites selected should be a federal issue. The same questions about who within the federal government should have responsibility for managing aquaculture development require resolution. This paper will examine lessons learned from the Texas experience for possible application in the federal arena.


2021 ◽  
Vol 69 ◽  
pp. 102285
Author(s):  
Alon Shepon ◽  
Jessica A. Gephart ◽  
Christopher D. Golden ◽  
Patrik John Gustav Henriksson ◽  
Robert C. Jones ◽  
...  

Hydrology ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 105
Author(s):  
Chrysi A. Papadimitriou ◽  
Yiannis G. Savvidis ◽  
Sofia Galinou-Mitsoudi ◽  
Amalia Moriki

In line with the framework of strategic guidelines for marine aquacultures, mussel cultures have to be operated in Areas of Organized Aquaculture Development (AOAD). Forty per cent of the national mussel culture production, which is based in Chalastra (NW Gulf of Thessaloniki, part of the Thermaikos Gulf), uses pole and longline systems. Due to legislative changes, both farmers and the authorities are in the process of reforming the existing units and planning processes based on the principles of sustainability, as defined in AOAD. The aim of this study is to estimate the appropriate orientation lines on which the mussel socks are to be placed in the mussel culturing units, in relation to the direction of sea currents for optimum water circulation in AOAD. The hydro-dynamics of the Chalastra basin is mainly wind driven and affected by prevailing northerly and southerly winds during winter and summer periods, respectively. When placed perpendicular to sea currents, the socks in the mussel production lines form an obstacle. Thus, the appropriate orientation of pole and longline units based on natural current directions can comprise a useful tool for sustainable mussel cultures. The benefits arising from the application of the proposed scheme are twofold: (a) productivity through the appropriate circulation and regeneration of nutrients can be maximized and (b) the environmental impacts of mussel culture activity can be minimized, as byproducts can more easily be dispersed of and biodegraded. In the present study, two basic schemes are proposed: (a) the division of AOAD is being researched into three sub-areas for pole and long-line units respectively and (b) the placement of the shortest possible length of production lines parallel to sea currents.


2020 ◽  
Vol 11 (4) ◽  
Author(s):  
Kondratiuk Tetiana ◽  
◽  
Melnyk Viktoriia ◽  

The effective functioning of any sector of agriculture is provided with adequate comprehensive state support. Aquaculture is no exception. The paper discloses the content of state support for agricultural activities in the field of aquaculture. The legislation defining directions and general principles of aquaculture development are analyzed. It is established that support for aquaculture activities by the state should be carried out by every possible means both in the economic and other areas: encouragement to produce naturally safe aquaculture products that can compete with the markets of other countries; financial promotion of breeding; improving fish productivity of water bodies through artificial restoration of water living resources; restoration of the proportion of populations of endangered and rare species of animals and plants whose habitat is water; promoting the development of own production of aquaculture feed; carrying out research and development in the field of aquaculture for their financing and introduction of results into production; financial support; providing training for highly qualified aquaculture professionals; promoting sustainable aquaculture production, etc. Financial, organizational and legal mechanisms of state support in the field of aquaculture are considered. Keywords: aquaculture, state support, compensation, financing, agriculture, aquaculture entities


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