Goldfish are the same as any other living creature. Cut off or reduce their Oxygen and they will start panting for breath and eventually die. To ensure your fish do not run out of Oxygen you need to observe and follow the basic fishkeeping rules which are :- 1 inch of fish needs at least 1 gallon of water. :- Every tank needs to have a permanently running cycled filter. :- Every tank needs at least 50% of its water replaced every week. Keep to the above rules and your fish will stand a chance of survival. Fail in any and I can guarantee that your fish will have constant health problems and will live a shortened life span.
I would expect them to have no effect on Goldfish whatsoever.
the lack of light being in the dark
dont know answer
lack of effect
No it will not. It will be runted by the lack of room. In order for goldfish to grow to full size they should be housed in ponds or very large aquaria.
I am not aware of magnets having any effect on goldfish. Maybe a large electro magnet created by passing windings around a tank then applying current through the winding could have an effect but a simple magnet placed on or into a fish tank should have no effect on the fish whatsoever.
lack security +effect+industry
Tiredness
Not for very long. Since goldfish are extremely high waste producers, a smaller body of water would slowly kill them due to the toxins and lack of oxygen in the water.
Powerpoint of lack of security of computer and its effect on industry,economy and government
There is very little sexual dimorphism between male and female goldfish. Male goldfish are generally more slender, because they lack ovaries. Female goldfish may have swollen abdomens. Unless you are a professional, it is not advised to breed goldfish at home, because they cannot lay their eggs due to selective breeding. The eggs must be squeezed out of the female, when they are ready.
For short periods it is fine. For longer periods sickness will occur due to a lack of needed nutrients for tropical fish that is not found in goldfish food. This is from personal observances.