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Fish Breeding Methods For The Crucian Carp

 

Fish farming is carried out at largely in most countries of Asia and Europe. Crucian Carp is one of the freshwater fishes that dwell in the rivers, lakes and reservoirs.  This is a fact sheet provided by the Food and Agriculture Organization of the UN which explains the methods that are adopted for the production of Crucian Carp.

Environmental and biological facts:

Crucian carp are usually sedentary type fishes that naturally propagate in different types of water bodies like lakes, rivers and reservoirs. They are basically omnivores generally feeding on filamentous algae, organic detritus, seeds and pieces of aquatic weeds and small benthic animals. But the larvae or the fry feed usually on zooplankton.

Artificial feed like pelleted feed, by-products from oil extraction and grain processing are also used in aquaculture. The main stimuli for reproduction are water level, rainfall and the temperature changes. The existence of aquatic weeds aids in spawning. They serve as the substrata for the eggs, which are normally adhesive. The average growth rate of a medium sized Crucian Carp is 1.25 kg.

The earthen pond culture is the mainly used system for rearing the Crucian Carp. But even rice paddies are used in countries like China.

Production cycle

 

Production cycle of Crusian Carp 

Criteria for Pond preparation:

There are certain typical aspects for the preparation of the pond for the reproduction and nursing of Crucian Carp and getting them ready for the end of year carp Sale.

Generally earthen ponds of the size of 1.5-2.0 m deep and 0.07-0.2 ha, are used for farming of the Crucian Carp. Before the Crucian carp is introduced in the ponds, the ponds are treated chemically with quicklime to ensure the elimination of all the harmful organisms that hinder in the process of Carp hatchery. The quicklime that is used usually amounts to 900-1125 kg/ha.

Even the organic fertilizers like the green and the animal manure are used for increasing the biomass of the zooplankton that is the natural food organisms for the carp. These are applied 5-10 days prior to stocking. This also depends on the water temperature. The quantity of the organic manures used may be:

4500 kg/ha for green manure.
3000 kg/ha for animal manure.

However, when both are used, their quantity gets reduced.

Supply of seeds:

The major supply of seed for Crucian carp culture is derived from artificial spawning. There are also natural seeds available in various water bodies that aid in carp culture. Carassius carassius gibelio is the commonly cultured carp. This is produced through the method of gynogenesis with the Xingguo red common carp which is the male and the female Carassius carassius gibelio. All female off-springs provided by the assorted gynogenesis, have a growth rate of 30-40 percent, which is higher than that of the original fish. There are also various other strains and species of Crucian Carp cultured in different parts of China.

Hatching process:

Usually matured and well selected brood stock is released into the spawning ponds, cages or tanks. Providing good substrata of palm leaves, plastic weeds, grass bundles and branches of fine trees, is very important in the water column where the spawning is carried on and the egg attachment takes place. Eggs can also be hatched in earthen ponds after treating them chemically. They require the eggs to be moved and fixed in the water column in the ponds along with the substrata.

Eggs hatch better in running water (jar or raceway). The eggs along with the substrata are merely hanged in the water column. The eggs along with the substrata can also be placed in jars or raceways, for hatching. The adhesiveness in the eggs is removed by blending with the clay solution before stocking. Later, the fry or hatchlings are shifted to the nursery ponds when they become capable to feed actively and swim well.

Sometimes hormonal injections are also given for the synchronous spawning of the fishes. Such hormonal injections are optional only. The fishes spawn well even without using them.

 

Nursery stage continued on our blog website

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Five Tips on Fly Fishing for Carp

Carp are sometimes hard to catch as they are very smart, easily spooked, and hard to trick.  If you plan on fly fishing for carp, there are a few things you should know to increase your success.  This article will give you a few tips.

Flies

It’s best to use flies that imitate food that carp are used to eating.  You can use a fly that poses as a small aquatic organism such as a worm, small crayfish, or leech.  Flies that imitate mulberries and seeds from a cottonwood tree also have a higher success rate.  Carp also feed on the dragonfly, damselfly, and mayfly larvae, so flies that look like that are also useful.

Senses

When fly fishing for carp, you should know that they are extremely sensitive to smell and taste.  Therefore, you should use a commercial product to add scent to the fly.  Alternatively, you can take some mud from the river bank or bottom and rub it all over the fly.  It will do enough to help mask your scent although it’ll come off after your initial cast.

Casting

Speaking of casting, you should always cast your fly as close to the carp’s nose as possible.  They have tunnel vision when feeding.  This means that they won’t go off course to eat your fly if you don’t place it close enough.  You will have much more success only going after fish you have spotted as opposed to hoping one happens across your bait.

Spooking

As mentioned earlier, these fish are easily spooked.  Once you spook one of them, it will emit a pheromone to warn others of potential danger.  This means you usually only have one shot when fly fishing for carp.

Wind

Carp are usually found going into the direction of the wind.  However, this doesn’t mean that you should try to cast downwind to catch them.  If you try to fish going downwind, they will detect your scent quicker.  As you already know, they have a great sense of smell.  So, make sure you cast from behind them or from one of their sides.

These are a few tips on fly fishing for carp. If you’re relatively new, there are many fly fishing basics you need to learn. So, click here now to pick up a few fly fishing tips to get you started.