MONITORING WATER QUALITY FISHING LAKES’
In recent years the proliferation of facilities dedicated to sport fishing has slowed sharply. This phenomenon was caused, not only by the general economic for recreational activities, from a growing realization that, to properly handle a lake for fishing, not just enter the water and fish in a depression more or less deep to fish for people.
A fishing lake has its own life and a number of characteristics as a function of its location, height above sea level, the presence of a natural water body nearby, the type and characteristics of water adduction, in depth and in morphological parameters, etc .; as a function of these features can establish the species to be entered, both quantitatively and qualitatively, the best fishing systems to be used, any treatments to maintain water quality at acceptable levels, the times of parts and many other variables that change from situation to situation.
The management of a plant for sport fishing, of any type it is, can’t ignore a continuous and accurate control of water quality, not only in terms of the possible risks for the fish fauna, but also and especially in terms of productivity.
Aquaquality is born from the need for a service of prevention, diagnosis and treatment of problems related to the quality of the water in which the fish lives.
The drawbacks that occur with greater frequency, and generating a series of economic problems of considerable entity, first of all the deaths of fish, are the anoxia (lack of oxygen dissolved in water). These can be caused by reasons more diverse but what’s important to know that they can be effectively prevented with proper and prudent management of the system and an optimization of the structures.
However, there are a series of problems, in addition to that of anoxia, which are related to the water quality in plants: from algal blooms, resulting in decomposition of organic biomass on the bottom, typical of the basins subject to eutrophication, the possible presence of substances toxic (an example among the most common that of ammonia, the chemical species produced by the same fish through their droppings, but that, in particular conditions of temperature and pH, is then toxic to their body).
Aquaquality provides a range of services and products ranging from prevention (risk assessments, evaluations of algal productivity, etc.), Diagnosis (analysis of various types in the field and laboratory) and finally to the care (supply of oxygenators, destratifiers and other machines suitable for the improvement of water quality). Also you can evaluate the quality of the water of a plant not only in terms of risk for the fish but with the specific objective of optimizing the management and increase the productivity of the plant itself (feedback of productivity).
MONITORING WATER QUALITY AQUACULTURE FACILITIES
Water quality is of paramount importance for the proper management of any aquaculture facility.They are well aware of the plant managers, who devote to this aspect much of their activity, sometimes without even realizing it.In fact, the fish lives in the water, and his health (and with it the portfolio manager and the owner of the plant) depends fairly closely by the parameters that affect the quality of water, first of all the temperature and concentration of dissolved oxygen.
The evaluation of the characteristics of the sources (understood as sources of drawdown in general) of the water that enters the plant the first fundamental operation to be performed for the purposes of a correct view of together.The type of source we will provide radically different problems if the water comes from deep wells dug, springs which flow from the surface or from water that is taken directly from a body of surface water (lake, river, canal, basin irrigation or artificial generally).It also needs to be evaluated for the presence of pollutants, or however of substances that may interfere with the health of the fish fauna, and, therefore, be clearly indicated in any treatments to be performed on the water inlet in the plant, treatments that often increase management costs, but it raises altres necessary to avoid real risks of mortalities or other associated problems.
The hot water is probably the section where controls and analytical determinations must be more accurate, precise and sensitive to extensively evaluate the risk associated with the health of the fish.
The first operation to perform the determination of all the chemical and physical parameters of interest; of course, the analysis must be accompanied by a suitable and complete interpretation of the data obtained, also taking into account the possible interactions or synergies between related values of different parameters (such as the toxicity of ammonia to fish depends on the pH and temperature of the ‘ water at the time of sampling, that of nitrites by the concentration of chlorides, that of the heavy metals from the hardness, etc.).
Of fundamental importance then the determination of the critical points of the system, of those points in which for a number of reasons, which can be extremely differentiated and peculiar to each installation, some operations, if conducted improperly, can cause sometimes irreparable consequences in charge of water quality.
Finally, in the general assessment shall cover all measures to be taken to improve and control the quality of the water for the prevention of risks (anoxia, blooms intense states of toxicity towards fish fauna) .
It ‘must finally also consider the quality of the water that is returned to the environment, and the opportunity to adopt suitable purification systems and to return the values of the various parameters within the limits imposed by the tables by law (D. Decree no. 152/06); in this context it is better understood the advantages of SAR (in Recirculation Aquaculture Systems; see section).