Biological characteristics (part 2)

It is more diffirence to determine maturity in males, only when sperm is found at the end of the vasectomy. Usually based on weight to determine when males weigh 50g or more.

Black Tiger Prawn life cycle
The development stages of Black Tiger Prawn’s larvae:

Nauplli method consists of 6 stages:
According to the technique of professional tiger prawns, 36 to 51 hours, the Naupllo swim short and then break, peeling 4 times, each time about 7 hours, living on their own, no need to feed, no need to install wings. Shrimp fan to supply oxygen to Nauplli.
N1: about 0.40mm long, 0.20mm thick.
N2: about 0.45mm long, 0.20mm thick.
N3: about 0.49mm long, 0.20mm thick.
N4: about 0.55mm long, 0.20mm thick.
N5: about 0.61mm long, 0.20mm thick.

The Naupllo swim briefly and rest in accordance with shrimp farming techniques
 Zoea consists of 3 stages:
Between 105 and 120 hours, the Zoea swim constantly around the water, peeling twice, each time about 36 hours, eating plankton.
Z1: about 1mm long, 0.45mm thick, prominent head and abdomen appear.
Z2: about 1.9 mm long, face and face.
Z3: about 2.7mm long, thorns on the belly.
 Mysis consists of 3 stages:
According to the professional tiger shrimp culture technique of 72 hours, the Mysis swimmers descend deeply, tails go first, head back.
M1: about 3.4mm long, with the appearance of adult shrimp, the appearance of pairs of legs, tail and tail fan, shrink back.
M2: about 4.0mm long.
M3: about 4.4mm long, longer belly legs, split into green, appear on the teeth.
 Postlarvae: Near-mature stage.
 Juvenile: maturity stage.

Mature age: Sexual maturation of male and female shrimps from August onwards. It is easier to determine the maturation of female prawns, by just looking at the pouch in the genitals.
The method of maturity in males is more difficult, only when sperm is found at the end of the vasectomy. Usually based on weight to determine when males weigh 50g or more.
The gonal inhibiting hormone (GIH) hormone is produced by neurons in the x-ray of the eye’s stalk, transported to the sinap thyroid gland into the stockpile and, when needed, secreted. The sexual maturation of Black Tiger Prawn through the action of the endocrine gland, when the eye is cut, which stimulates the moulting cycle, resulting in greater maturity. At the same time, it is advisable to install more turbine blades to make shrimp grow and develop better.

Hormonal regulation hormone (GIH) hormones are produced by the nerve cells in the organ of the eye suture.
The number of eggs laid by the shrimps: more or less depends on the quality of the ovaries and the individual weight: the greater the weight of the egg. When females mature naturally, weights between 100 and 300g for 300,000 – 1.2 million eggs. If the cut eye cat in the cement tank, mature and lay, the number of eggs from 200,000 to 600,000 eggs.
Eggs lay eggs at night (usually from 22h to 2h). Eggs after laying 14 to 15 hours, at 27 to 29oC will hatch into larvae (Nauplli). Black Tiger Prawn breed throughout the year, but focuses on two major periods: March – April and July – October. Male Black Tiger Prawn life is about 1.5 years, females about 2 years.
There are two characteristics that need attention in the tiger shrimp life cycle: growth from postlarvae to adulthood occurring in the estuary (characterized by brackish water). Reproductive maturation, mating, spawning and larval development occurred in the offshore areas where salt concentrations ranged from 28 to 32% and were stable.

Nutritional characteristics of Black Tiger Prawn
Nutritional characteristics of Black Tiger Prawn through the development stages from Nauplli to mature shrimp:
 Nauplius stage: shrimp larvae fed with ovulation.
 Zoea stage: extra-nutritive shrimp, preferred food is silica, typically Skeletonema costatum, chaetocerot, larvae of Artemia. Brachionus sp.
 Mysis stage: The most preferred food of larvae of larvae remains the larvae of Nauplli Artemia. Brachionus sp.
 Postlarvae stage: shrimps go to the bottom and food consists of zooplankton, corpses of rotting animals …
 Shrimp mature stage: bottom layer and food are mainly benthic, bivalve, carcass corpses, etc. Gastric digestion of shrimp is mainly Peptilase, which indicates shrimp is Species that feed on animals are predominant.

Digestive enzymes in the stomach of the its mainly Peptilaza
Factors that affect the feeding of tiger shrimp
 Temperature:
The prey intensity of the largest tiger shrimp from 28 – 30oC, the temperature below 20oC or over 30oC shrimps catching prey, and at temperatures below 15oC or above 35oC, shrimps stop activities prey. In order to stabilize the temperature as well as the amount of oxygen in the water for shrimp, it is necessary to install a shrimp fan blade.

The prey intensity of the largest tiger shrimp from 28 – 30oC
 Light:
Shrimp are the weak-light species, the prey intensity of the largest shrimp in the evening and near the morning, in addition to reproductive activities, also affect nighttime activities. When light intensity is strong, shrimps reduce their prey and burrow into the mud. This has great significance

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