Poultry and Fishery MCQ With Explanation For Competitive Exam-106

Q. What is the age of the layers at which they start laying eggs?
[1] 20-21 weeks
[2] 14-16 weeks
[3] 7-10 weeks
[4] 28-30 weeks
[5] None of the above
Answer : [1] 20-21 weeks

▪ Birds usually start to lay at around five months (20-21 weeks) of age and continue to lay for 12 months (52 weeks) on average, laying fewer eggs as they near the moulting period.
▪ The typical production cycle lasts about 17 months (72 weeks) and involves three distinct phases, as follows.
▪ Phase 1: Small chicks or brooders. This phase lasts from 0 to 2 months (0-8 weeks) during which time small chicks are kept in facilities (brooder houses) separate from laying birds.
▪ Phase 2: Growers. This phase lasts about 3 months, from the ninth to the twentieth week of age. Growers may be either housed separately from small chicks or continue to be reared in brooder-cum-grower houses. It is important to provide appropriate care to the growers particularly between their seventeenth and twentieth week of age as their reproductive organs develop during this period.
▪ Phase 3: Layers. Growers are transferred from the grower house to the layer house when they are 18 weeks old to prepare for the laying cycle. Birds typically lay for a twelve-month period starting when they are about 21 weeks old and lasting until they are about 72 weeks old.

Q. What is the optimum temperature (in degree centigrade) at which egg laying by layers is considered good?
[1] 38-42
[2] 33-36
[3] 28-32
[4] 11-26
[5] None of the above
Answer : [4] 11-26

Q. Which of the following breeds of poultry is the best egg type breed of poultry?
[1] Brahma
[2] Kadaknath
[3] Leghorn
[4] Minorca
[5] None of the above
Answer : [3] Leghorn

Q. Which of the following breeds of poultry is the best meat type breed of poultry?
[1] Brahma
[2] Cornish
[3] Leghorn
[4] Minorca
[5] None of the above
Answer : [2] Cornish

Q. What is the spacing requirement for layers (per bird) in cage system at an age of 18-72 weeks?
[1] 0.5 ft2
[2] 1 ft2
[3] 1.5 ft2
[4] 2 ft2
[5] None of the above
Answer : [1] 0.5 ft2

▪For layers aged between 0-8 weeks, 0.2 ft2 is required and for aged between 9-18 weeks, 0.3 ft2 is required under cage system of housing and under deep litter system, 0-8 weeks, 0.6 ft2; 9-18 weeks, 1.25 ft2; 18-72 weeks, 1.5 ft2 reqd.

▪ For broilers, aged upto 18 days, 0.5 ft2 per bird is required and for aged between 19-42 days, 1.1 ft2 is required. The floor space requirement in cages is 50% of the floor space needed in deep-litter.

Q. Which of the following pairs are matched wrongly regarding the housing of poultry birds?
[1] Deep litter system – availability of Vit. B12 and B2 naturally
[2] Cage system – Minimal broodiness
[3] Cage system – Osteoporosis
[4] Deep litter system – Respiratory disease incidence
[5] None of the above
Answer : [5] None of the above

•Caged layer fatigue is a related condition observed in caged laying hens, usually around peak egg production, that may also be associated with osteoporosis, a condition causing brittle bones as a result of reduced bone density.
• A high incidence of cage layer fatigue can be prevented by ensuring the normal weight-for-age of pullets at sexual maturity and by giving pullets a high calcium diet (minimum 4.0% Ca) for at least 7 days prior to first oviposition.
• Deep litter system-Vit B2 and Vit B12 are made available to birds from the litter material by the bacterial action. Because of the direct contact between bird and litter, bacterial and parasitic disease may be a problem. Respiratory problems may emerge due to dust from the litter. The deep litter manure is a useful fertilizer.

Q. Which of the following nutrient’s deficiency causes Perosis in poultry birds?
[1] Iron
[2] Calcium
[3] Manganese
[4] Protein
[5] None of the above
Answer : [3] Manganese

▪The most dramatic classic effect of manganese deficiency syndrome is perosis, characterized by enlargement and malformation of the tibiometatarsal joint, twisting and bending of the distal end of the tibia etc.,.
▪ In laying hens, reduced egg production, markedly reduced hatchability, and eggshell thinning are often noted.

Q. The optimum ratio of stocking density of fishes in Composite Fish culture with regards to three species combination, Catla: Rohu: Mrigal is
[1] 4:3:3
[2] 5:4:3
[3] 6:5:2
[4] 1:1:1
[5] All of the above
Answer : [1] 4:3:3

▪Composite fish culture is a method in which three to six different types of fish species are
grown together (in different ratios) in a single fish pond. Fish with different food habitats
are selected so they don’t fight with each other for food. This guarantees that the food
supplies in the pond are completely utilized. Such a system improves the fish yield.
▪ Example: Catla feed on the water surface, rohu are feeders for the middle region, mrigal
and common carp are feeders for the bottom and grass carp feeds on weeds.
▪ In 3 – species combination excluding exotic carps, the optimal ratios are – catla 4 (40%) :
rohu 3 (30%) : mrigal 3 (30%).
▪ In 5 – species combination excluding grass carp, the optimal stocking ratios are catla
6(30%) : Rohu 3(15%) : Mrigal 5(25%) : Common carp 4(20%) : Silver carp 2(10%).
▪ In 4 – species combination excluding silver carp and grass carp, the optimal stocking
ratios are – catla 6 (30%): rohu 3 (15%): mrigal 6(30%): common carp 5(25%).

Q. Which of the following pairs is not matched correctly in regards to the requirement of optimum conditions in Fresh water prawn rearing?
[1] Temperature – 28 to 31 degree centigrade
[2] pH – 7.0 to 8.5
[3] Salinity – < 10 PPT
[4] Total hardness of water – 150-200 PPM
[5] None of the above
Answer : [4] Total hardness of water – 150-200 PPM

Q. As per Annual Report of NABARD 2019-20, during the financial year 2018-19 exports of Marine Products reached an all time high of 13.9 lakh tonnes. Which of the following breeds of shrimp has helped in achieving this feat?
[1] Penaeus monodon
[2] Penaeus indicus
[3] Litopenaeus vannamei
[4] Penaeus setiferus
[5] Litopenaeus atlantis
Answer : [3] Litopenaeus vannamei

L. vannamei is a decapod crustacean which is native to the eastern Pacific coast of Central and South America from Tumbes, Peru in the south to Mexico in the north. It has been introduced widely around the world since the 1970s, but especially since 2000, as it has become the principle cultured shrimp species in Asia.

Q. Which of the following indigenous breeds of cattle has the highest lactation?
[1] Umblecherry
[2] Tharpakar
[3] Jersey
[4] Kankrej
[5] Sahiwal
Answer : [5] Sahiwal

Sahiwal cows are well-known for their milking capacity. Milk yield varies from 2000 to 4000 kg per lactation, with fat content varying from 4% to 4.5 %.
▪ Originated in Montgomery region of undivided India.
▪ This breed otherwise known as Lola (loose skin), Lambi Bar, Montgomery, Multani, Teli.
▪ Best indigenous dairy breed.
▪ Reddish dun or pale red in colour, sometimes flashed with white patches.
▪ Heavy breed with symmetrical body having loose skin.
▪ The average milk yield of this breed is between 1400 and 2500 kgs per lactation.

▪ The Karan Swiss is the excellent crossbred cattle obtained by crossing Brown Swiss breed with Sahiwal cattle at NDRI, Karnal.
▪ The Karan Fries is an excellent crossbred cattle obtained by crossing Holstein Friesian breed with Tharpakar cattle.

Q. The amount of blood that needs to pass through the udder of cows for production of 1 litre of milk is
[1] 50 litres
[2] 100 litres
[3] 250 litres
[4] 500 litres
[5] Linseed
Answer : [4] 500 litres

▪The udder of the cow and buffalo has four quarters, each quarter having a teat.
▪ In the sheep and goat the udder is divided into two with two teats.
▪ Milk is produced in the udder from nutrients in the blood which flows through the vessels (tubes) in each quarter.
▪ The greater the amount of blood passing through the udder the greater the amount of milk which is produced.
▪ To produce 1 liter of milk 500 liters of blood have to pass through the udder. When a cow produces 60 liters of milk per day, 30,000 liters of blood are circulation through the mammary gland.

Q. The Optimum service period for cattle is ________.
[1] 30-50 days
[2] 90-150 days
[3] 60-90 days
[4] 15-30 days
[5] None of the above
Answer : [3] 60-90 days

• Service period is the period between date of calving and date of successful conception.
• The optimum service period helps the animal to recover from the stress of calving and also to get back the reproductive organs back to normal.
• For cattle the optimum service period is 60-90 days.
• If the service period is too prolonged the calving interval prolonged, less no. of calving will be obtained in her life time and ultimately less life time production.
▪ If the service period is too short, the animal will become weak and persistency of milk production is poor due to immediate pregnancy.

Q. Which of the following breeds of cattle has lyre shaped horns and the gait is peculiarly called as 1 1⁄4 paces (sawai chal)?
[1] Hariana
[2] Kankrej
[3] Ongole
[4] Alambadi
[5] None of the above
Answer : [2] Kankrej

▪ Kankrej is otherwise called as Wadad or Waged, Wadhiar and is a dual purpose cattle breed, for draught as well as milch cattle.
▪ Originated from Southeast Rann of Kutch of Gujarat and adjoining Rajasthan (Barmer and Jodhpur district).
▪ The horns are lyre-shaped.
▪ Colour of the animal varies from silver-grey to iron-grey or steel black.
▪ The gait of Kankrej is peculiar called as 1 1⁄4 paces (sawai chal).
▪ Kankrej is valued for fast, powerful, draught cattle. Useful in ploughing and carting.

▪ The cows are good milkers, yielding about 1400 kgs per lactation.

Q. Which of the following breeds of buffaloes has the highest percentage of butterfat in milk?
[1] Maharashtra
[2] West Bengal
[3] Bhadawari
[4] Andhra Pradesh
[5] None of the above
Answer : [3] Bhadawari

Bhadawari buffaloes are specifically renowned for the high content of butterfat found in their milk, which ranges from 6.0 to as high as 12.5%. Bhadawari Buffaloes are found in the ravines of
Yamuna and Chambal rivers spread over in the states of Uttar Pradesh and Madhya Pradesh. The Bhadawari breeding tract was a part of the erstwhile Bhadawar estate from where the name of these animals originated. The horns are characteristically placed, flat, and compact and of average thickness, growing backwards and then upward turning inwards with slightly pointed tips.

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