What should be noted when raising crucian carp
As the most common fish variety in people's daily lives, crucian carp is farmed in no small number of places across our country, and problems always crop up in day-to-day farming. In fact, many problems can be avoided as long as people pay attention to them in daily practice. Now let's take a look together with Qinnong Net at the aspects to note when raising crucian carp.
1. Stocking density
Stocking density is something many people know about and pay attention to, but do you understand the specific breakdown? Generally, the adult fish density in a rearing pond is controlled at around 1500-1700 fish per mu, distinguished by water depth density: deeper water allows a bit more stocking, and at 2.5 m depth about 1700 fish can be raised. When the crucian carp grow to about one jin, they should be appropriately reduced, otherwise the stocking density will become too high, and when stocking density is too high, both disease and insufficient oxygen will occur very frequently. When you notice that fish in the wooden trough area often float to the surface, you should know this means the stocking density is too high.
2. Water quality regulation
Water quality regulation is a problem everyone cares about very much, but in many farmers' minds water quality just means oxygen, which is a mistaken idea, because insufficient oxygen is only one kind of poor water quality. Water quality problems also include the content of trace elements in the water and the content of plankton and various other aspects, so people often encounter the situation where even though an oxygen supply device has clearly been added, the water quality is still very poor and the fish raised are not ideal at all. In this respect, it is suggested that everyone plant some aquatic plants or water algae in the water, which can not only increase the content of some trace elements, but also provide crucian carp with abundant plankton.
3. Mixed farming issues
Raising crucian carp as a single species has always produced unsatisfactory results, until later everyone discovered the benefits of mixed farming. So what issues should be noted when mixing crucian carp with other fish species? First is the proportion of the mixed species, generally between 10%-20%. Second, the mixed species must not be carnivorous in any way and should be relatively docile; snakehead and catfish are species that absolutely must not be mixed in. More suitable ones are grass carp and common carp, but the proportion of these two should be controlled at 10%, because these are fish species with relatively large food intake and can easily snatch the crucian carp's food.
4. Feed size
In fish farming, feeding issues must be noted in a timely way in the early stage, especially regarding feed size: if it is too small, the feed will scatter as soon as it enters the water, which is not good for the young fish to eat; if it is too large, they cannot swallow it. The feed fed during the fry stage is in crushed granular form; when raising fry, the young fish are relatively densely stocked, and the feed dispersing in the water will not be wasted. Later, when the fry grow to 20-50 grams, the feed size should be controlled at around 0.1 cm; at 50-250 grams, the feed must not exceed 0.2 cm; after 250 grams, controlling the feed size at 0.3 cm is fine.
The above are some of the issues to note when raising crucian carp. Fish farming has always been rather troublesome. Because the fish are in water for long periods, many times problems are hard to judge when they occur, and you can only occasionally rely on spot checks to inspect them; some obvious situations can still be discovered, while for the rest you can only rely on paying more attention in daily practice, so in fact the above points to note are very important.