Saturday, November 2, 2013

Trout Fish

Trout Fish have strongly colored, active fishes of cold or temperate lake and rapid stream, the approximately 15 species of trout are grouped with the salmon in the family Salmonidae. All but two of the genus Salmo are regarded as trout. Once limited to the Northern Hemisphere, they are valued s game and food fish and have been introduced into the Southern Hemisphere. Although trout are predominantly freshwater fishes, some species migrate to the ocean after spawning upriver.

The trout has a moderately long, unspecialized body, that is laterally compressed, smooth, and muscular. Axial and paired fins are without spines. The softer fleshy adipose fin, between the dorsal and caudal fins, is an indicator that the trout is salmonid. All scales are small except for the elongated axial scale at the base of each pelvic fin.

The trout’s diet changes with age. Fry, or newly hatched fish, feed on aquatic insect larvae for the most part. Adults eat mainly small fish, shrimp, and winged insects.

Many male and female trout return after maturing (3 to 4 years) to the same place they were hatched in order to spawn. Most trout breed in early spring in running water. The female lays her eggs in a depression she makes by vigorously vibrating her tail in the gravelly shallows. The nearby male discharges his sperm to fertilize approximately 200 eggs, which hatch in about 40 days. As many as 10,000 eggs may be laid per season by a single female. More than 90 percent of fry are killed during the first 3 to 4 months of life by predators.

One of the best known trout is the brown trout, or sea trout, S. trutta, of Europe. This fish keep to the deeper pools and overchanging shelter of mountain streams. The seven lake trout, ischchan, and the cutthroat trout, S. clarkia, have been able to invade new and changing mountain drainages and occupy ephemeral lakes. Both species, however, have been subjected to severe recent modifications of habitat and reduction of population by dams and other human constructions.

One of the most popular game fish is the rainbow trout, S. gairdneri, the several forms of which are native to American Pacific Coast stream, The rainbow trout gets its name from the broad band of red along its sided.

For most trout populations, measures for control and conservation have been established trough government agencies and associations. Artificially propagated fish are planted in order to provide extra catches for more anglers.

Tuesday, July 23, 2013

Artificial Fed of Vanamei Shrimp

Vanamei shrimp (Litopenaeus vannamei) is one of fisheries commodity which has high economic value so that looked after by many farmer. The availability of a cheap and good quality of feed influences the success of vanamei shrimp (Litopenaeus vannamei) production. The aim of this job training is to improve knowledges, experiences, and skill about the making of sinking feed for vanamei shrimp begins from preparation, making, saving and knowing the obstacles or problems of making the artificial feed for vanamei shrimp. This training was held in Balai Besar Pengembangan Budidaya Air Payau which located in Bulu Village, Jepara District, Jepara Regency,Central Java. The job training started from July 17th 2010 until August 30th 2010.

Work method which used was descriptive method by collecting primary and secondary data. Data collection was conducted by observation, active participation,interview, and study paper.The production of artificial feed for vannamei shrimp (Litopenaeus vannamei) is one of activity held by BBPBAP Jepara. Artificial feed made by BBPBAP Jepara is not commercial feed but made as one of improving science activity and improving of artificial feed production in Indonesia. Te improvement is held continuely to reach a good quality of artificial feed for Indonesian Shrimp farmer.Especially this job training study about the artifial feed production by using Skeletonema sp. powder as protein source. The process of this artificial feed production such as preparing and collecting raw material, arranging feed formulation, and making the artificial feed. Preparing and collecting raw material includes look over the quality of material consist of physic examination and chemical examination such as nutrition examination. For Arranging feed formulation, BBPBAP Jepara uses combination between person’s square method and computer method.

The process of making artificial feed consists of many steps such as grinding, sieving, weighing, making binder, mixing, shaping, heating, drying, and saving. Artificial feed quality examination is done chemically and physically. Chemical examination is held by analyzing the level of nutrition contained in the feed.Physical examination includes color examination, smell examination, water stability, and sinking. The result of chemical examination shows 34,91 % value of protein , 7,62 % value of water, 18,70 % value of ash, 7,06 % value of fat, 3 % value of fiber, 28,71% value of BETN. Smell examination shows that the feed has a special smell like fish powder, the color of feed is green and brown, with the value of water stability is 69,33%, and the value of sinking rate is 5 seconds. Based on the artificial feed criteria defined by SNI 2009 about nutrition of artifial feed, The artifial feed produced by BBPBAP Jepara can be classified as a good quality of artificial feed.

Tuesday, April 16, 2013

Type and Price of Gurame Fish

Soang Gurame
Soang carp have characteristic features with black gray color, comes from Thailand. This type of carp can reach sizes of weighing 8 kg with a length of 65 cm is usually designated as the parent producing eggs.

Egg prices in general as follows:
  • Egg price variation between Rp. 25 per item up to Rp. 80 per item depending on the season.
  • Size nails price of Rp. 1000 per head
  • Size razor Rp. 1700 per head
  • Size matches the price of Rp. 2200 per head
  • Super size Rp. 3500 per head
Japanese Gurame (Japan)
Relatively short body and smaller scales. Size reached only 45 cm with a weight less than 4.5 kg. Japan as carp have scales are not too big and he was short with white-gray and reddish. The other type is known as the red carp.

Type of carp that have long been recognized only two types, namely Japan carp and soang carp, but there are some new strain of carp, there are allegations that the new strains are derivated or cross-breeding of Jepan carp and carp soang, the name is adjusted on each region.

1. carp Porsalin
2. carp Blusafir
3. carp Paris
4. carp Soang
5. Japanese carp
6. carp Bastar

Porcelain carp
Porcelain carp most widely developed in West Java, especially Bogor. Compared to other types of carp, porcelain was superior in producing eggs. If the hybrid parent in each nest is only able to produce 2000-3000 eggs, porcelain capable of 10,000 items. Therefore, people call it as the top of the pop, and the most favored. When viewed from the color are black carp, white and striped.

Sunday, April 14, 2013

Red Crystal Shrimp

Crystal Shrimp is a kind of decorative shrimp that is prefer in Japanese and also in all over the Asian Countries. The price of this shrimp is relatively high for Indonesian people, because the form is small but have high price. For example the normal price of red crystal shrimp is about Rp. 3500 per shrimp with size about 2 cm. But the other type of crystal shrimp about Rp. 75,000 per shrimp.

The price of red crystal special species that successful being born is red crystal with almost white color in all the body. This crystal shrimp is sell with 2 million yes in Japan or Rp. 233 million in Indonesian money. The highest price of a decorative animal in the world.