hello my friends in stemian friend this time I will tell about the fish very loved the citizens of Indonesia and to uniquely his is his review below.
One of Indonesia's favorite food is catfish. In addition tastes good and the meat is tender, nutritional content in the catfish is also a lot.
Catfish is a long-bodied freshwater fish species and slippery skin. In some areas of Indonesia, catfish have many mention, such as fish kalang (Padang), fish death (Gayo, Aceh), fish pantet (South Kalimantan), rivet (Makassar), fish cepi (bugis) and catfish / leachate (Central Java).
Not only in Indonesia, catfish also has many names in other countries such as, plamond (Thailand), mali (Africa), fish keli (Malaysia), gura magura (Sri Lanka) and ca tre trang (Japan).
In English the catfish is called catfish, mudfish, siluroid and walking catfish.
Catfish body shape is different from other types of fish, so it can easily be distinguished by other types of fish. The body is elongated, the head is flat, not scaly, has 4 pairs of long mustache and has additional breathing apparatus (arborescent organs).
The body of the front of the catfish rounded, the middle and the back of a flat shape.
- External morphology of catfish
It is a feature that can be observed visually / visually. Which includes the external characteristics of catfish, among others.
1.Head shape
Catfish head shaped flat and blackish brown. At the head to the neck there is a white patch.
Foggy
Trigger or whiskers on the catfish grow on the front ujubg part of the head around the mouth. There are 4 pairs of tunnels, where a pair of tentacles are near the nose, a pair is in the maxilla, a pair in the lower mandible (mandible) and a pair of tentacles again in the lower mandible (mandible).
Of the four pairs of tentacles, only mandibular that can be moved. Function of this tentacle as a means of touch and smell the existence of food in the dark waters and turbid waters.
Mouth
Catfish has a fairly wide circle of mouth that is 1/4 of its total length with mlutny opening is not as wide as its mouth. Catfish can eat a variety of foods from zooplankton renik to large animals.
The catfish is also able to suck the basic animal waters (benthos), swallowing directly the animal of the same size as its mouth and tearing the animal carcass with the teeth in its jaw. Teeth on catfish shaped Villiform and attached to the jaw.
Body shape
Catfish have a unique body shape when compared with other fish. The body shape is radial symmetry, elongated, not scaly and slippery.
In general the length of catfish 5-6 times the height and length of the raw against the head length is 1: 3-4. Catfish eye measuring approximately 1/8 the length of his head.
The vision function in the catfish is not very good, but the catfish has two olfactory tools that are located adjacent to the nose pitcher. The function of this tool is to recognize its prey through palpation and smell.
Skin
Catfish have slimy skin and are not scaly. Has a black pigment on the back and sides. If exposed to sunlight, catfish skin will turn into pale.
In addition, if the catfish experience stress skin color will also turn into blont-blanteng black and white. If you keep the catfish for cultivation purposes, preferably catfish that change skin color separated because it will slow the growth.
Fin
The catfish has a number of P.I9-10 pectoral fins, D.68-79 dorsal fin, dorsal fins V.5-6 and anal fin A.50-60. The first radius of pectoral fin is very strong in the form of serrations and both sides are coarse as well contains toxins. In addition, this first fins also serves as a propulsion tool when the catfish is on the surface.
Genitals
Catfish breed by laying (ovipar) where fertilization occurs outside the body. Gonad in catfish amounted to two pieces located in the intestine and the size of its size is relatively short compared to the body.
Catfish has a hull with a relatively large size and length and a pair of hearts and bubbles pool.
Male catfish has a sex that looks clear and tapering back. While the female catfish oval shaped oval and rather large used for the exit of eggs.
Genitals in catfish are urogenithal because these genitals have other functions that is as a disposal of urine. Both male and female catfish, both have a papiplla (bulge) on the urogenesis hole located behind the rectum.
- Internal Morphological Characteristics
Is a feature in the organ of catfish that consists of gills, stomach shape, intestine form, testes and ovaries.
Gill
As in general, fish have gills that serve as a respirator. In catfish, there are additional arboresence breathing apparatus that is used when the aquatic environment contains little oxygen.
Arboresence is located at the head inside the cavity formed by 2 bony plates of the head. This extra breathing apparatus has a reddish color and is shaped like a dense canopy of trees full of blood capillaries.
Along the gill arch bone of the catfish there are gill rakers (long gill rakers) which function as filter food in the form of plankton and microorganism.
Stomach
There are four layers in the catfish stomach, the mucosal layer, submucosa, muscle and sereus. The back of the catfish's hull forms a zigzag like a bee's tissue.
Testes
Testes are the internal organs of male catfish. The testes will pass through the stages of development when ready to spawn. These stages are excluded from spermatogonia to primary spermatocytes and then to secondary spermatocytes to spermatids and finally to spermatozoa.
The process of spermatogonia into spermatids is called spermiogenesis, and from spermatid to spermatozoa is called spermatogenesis.
Parent catfish that are ready to spawn (has ripe gonad) is marked with sperm bags are full milk white.
Here is the table of gonad maturity level in male catfish
Ovary
The ovaries are the organs in the female catfish genitals which are the egg bags. A mature ovary will pass through several stages: from oogonia to previtellogenic to vitellogeny, then to postvitellogenic (at this stage the ovaries are ripe) and the next stage is atresia (at this stage the ovaries are not productive anymore).
In contrast to the male catfish, the gonads on the mature female catfish are brownish and solid. The mature eggs will appear to be separate from each other and uniform in size.
Here is the table of maturity level gonad on female catfish
well that's the explanation from me about the catfish quality and good fish hopefully useful my story do not forget
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