Thus, the spawning period is defined more clearly than most tropical species, for which the importance is not so much the temperature, the amount of rainfall.
You can determine the start time of spawning, regularly measuring the temperature of the water in the pond, because the spawning usually begins at a temperature of about 20°C. At this temperature the eggs develop normally. Plus or minus 5 °C, and the fry will be deformed, because things will develop too quickly or too slowly.
Physical changes in the fish also indicate the approach of spawning. For example, the males of the family Cyprinidae appear white swellings, called tubercles. Fish such as Orfe, Rudd, goldfish and koi, the tubercles appearing on the Gill covers and pectoral fins, while Cipriani – along the scalp.
Some fishes, such as sticklebacks, coloring of the male becomes brighter, attracting mates and scaring off rivals. Females of all cold-water species become fuller males. Continue reading
Sharks are found in open and coastal ocean waters. These mysterious creatures appeared on Earth 400 million barrels. years ago. Belong to cartilaginous fish. as their skeleton consists of cartilage. Cartilage is durable, and unlike the bones of fish, more flexible and light. They have no swim bladder. Afloat fish holds, thanks to its large but lightweight the liver. Her need to constantly move in order not to drown.
She swims, arching his whole body from side to side. Almost all of them when hunting using the electric field. Sharks capture him with the help of numerous electrical sensors that are on her face.
Many of them, it is not strange, they eat plankton. Plankton is a conglomeration of various microscopic and small organisms. Mainly unicellular plankton contains algae, which absorb solar energy, thereby transforming inorganic substances into organic food. Continue reading
Good day to all. I want to tell not much about sea water aquarium with reef. marine invertebrates and fishes . if something miss I’d like to hear addition.
Sea water complex and one of the main components of the reef based sea water initially enters fresh water (source), but not from the tap (although I know people who have successfully used regular tap ). I personally use an ion exchange filter which is easy to collect yourself and while spending large amount of money. but this filter will not purify water 100 % silicates it will not delete but since the corals, do not bypass the silicon silicates serve them feeding. The most common and recommended in the preparation of sea water is “Reverse osmosis” this filter is much more complicated in design than the ion exchanger and more. the most difficult to collect especially if you start current. Now suppose that we have an aquarium. we filtered the water and poured it into the aquarium . what’s next. and then it becomes a question. how to make it salty. today in pet stores for sale Continue reading