Really, fishes (either fingerlings or juveniles) do pass through a lot of stress in the cause of cropping them, transporting and stocking them in the pond where they will grow to table size.
The extent of the stress depends on the distance covered in transporting them, the time of the day they were transported and how they were handled during stocking.
Therefore, if you notice that they were stressed in the cause of of all these, giving them anti-stress is necessary. You can as well consult an expert for the right choice of anti-stress.
Meanwhile antibiotics should be given to the fishes only when recommended, it should not be a routine practice otherwise when they are sick and in need of the antibiotics, they might have develop resistance to most of them.
Do you wish to know how drugs can be administered to the fishes? Well commonly, drugs are introduced into the water in the pond. The level of water is reduced to an appreciable depth usually about a foot, the drug is then introduced based on the quantity recommended, you then leave both the treated water and the fishes for some time usually between 30mins and an hour.
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After this time, you can then pump in fresh water to add to the water to which drug is added.
Note that reducing the water level of the pond before adding the drug will aid the efficiency of the drug.
As regards to how early fishes respond to treatment, well like any other animal, fish will respond to treatment immediately you are treating the right disease using the right drug.
You only have to be sure of the disease you have on ground so that the right drug can be administered which means you need to consult your expert.
Just like humans, though, stress in fish can lead to serious health complications, so it’s important to be able to recognize when your fish is stressed and what you can do to help.
Symptoms of Stress among Fishes
You should observe your fish often for any of these signs of stress.
Gasping at the Surface: If a fish is gasping his mouth at the surface, this is a sign of stress brought on by poor water conditions, usually a lack of oxygen.
Appetite: If a fish is stressed, oftentimes he will not eat.
Disease: Ich, characterized by white spots on the body of a fish, and other diseases can appear as a result of your stress. If you observe this or any other visible ailments or sores on your fish, you should talk to your veterinarian about possible treatments.
Strange Swimming: When fish are stressed, they often develop odd swimming patterns. If your fish is swimming frantically without going anywhere, crashing at the bottom of his tank, rubbing himself on gravel or rocks, or locking his fins at his side, he may be experiencing significant stress. Talk to your veterinarian about treatment and look into what may be causing the stress and alleviating it.
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Causes of Stress among Fishes
Stress in fish is caused by many different factors. Most situations that can result in a change of habitat or a disturbance in routine and behavior are able to cause stress. Here are some examples:
Improper water conditions: The conditions of your fish’s water can cause lots of stress if they are poorly maintained. If you see your fish gasping at the surface, you should conduct a water test immediately to find out if there is anything wrong with it. High ammonia or nitrate levels, low oxygen levels, improper temperature or a high or low pH can cause stress. If you have a saltwater tank, incorrect salt levels could have a similar effect.
Troubles with other fish: Like humans, not all fish get along, and they often feel cramped if they live with too many other fish or the wrong fish. Make sure you don’t put too many fish in your aquarium, as this leads to various problems in fish combativeness and water quality. Also, fish need multiple hiding spots so that they can avoid aggressors. In addition, when feeding your fish, try to evenly distribute the food, so fish don’t have to compete.
Other factors: In addition to those already mentioned, there are some other factors that lead to stress. One of these is the presence of any added chemicals or medications in the fish’s tank. Make sure when treating a sick fish, he is properly quarantined first. Additionally, improper diet can cause stress. Make sure you know your fish’s ideal diet and do your best to adhere to it. Finally, disturbances of a fish’s habitat such as banging or loud noises can lead to stress. If you have children, make sure they know to respect the fish’s home.
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Next Steps:
If you determine that your fish is suffering from stress, you should act quickly to treat him. If left alone, stress can lead to serious and possibly fatal diseases like Dropsy and Fin Rot.
First, you should try to determine what is stressing your fish, and eliminate that cause. You can do this by testing the water and examining your fish’s behavior. If this doesn’t improve your fish’s condition, you should talk to your veterinarian about possible solutions.
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