Fisheries • 2017 • Technical Paper-II
Size of Female rotifer is :
A)
Larger than male
B)
Same with male
C)
Smaller than male
D)
None of these
Female rotifers distinctly larger than dwarf males; sexual dimorphism.
Fisheries • 2017 • Technical Paper-II
Stage of PL stocked for grow-out prawn culture is :
A)
PL 10
B)
PL 20
C)
PL 12
D)
Both (b) and (c)
Macrobrachium PL for grow-out typically PL12-PL20; both PL12 and PL20 acceptable, so Both.
Fisheries • 2017 • Technical Paper-II
In cryopreservation of fish gametes, which one of the following is NOT:
A)
Dimethyl sulphoxide
B)
Methanol
C)
Ethylene glycol
D)
MS -222
MS-222 tricaine is anesthetic, not cryoprotectant; DMSO, methanol, ethylene glycol are cryoprotectants.
Fisheries • 2017 • Technical Paper-II
Base on the duration of life cycle, zooplankton are classified into:
A)
Mero plankton and holoplankton
B)
Micro plankton and macro plankton
C)
Mero plankton and macro plankton
D)
All of these
Based on life span: holoplankton lifelong planktonic, meroplankton part of life.
Fisheries • 2017 • Technical Paper-II
Cryopreservation of fish eggs is difficult because of its:
A)
Large size
B)
High fat content
C)
High water content
D)
High Yolk content
Fish eggs large size, high yolk content, low surface-volume and low permeability prevent cryoprotectant entry; primary cited reason is large size and high yolk.
Fisheries • 2017 • Technical Paper-II
1 gm dry weight of organic matter :
A)
4.5 K cal
B)
3.5 K cal
C)
5 K cal
D)
5.5 K cal
General energy value of dry organic matter is ~5 kcal/g.
Fisheries • 2017 • Technical Paper-II
In fish culture ponds, the inlets and outlets are constructed in:
A)
Opposite side
B)
Right angle to each other
C)
Same side
D)
None of these
Inlets and outlets on opposite sides improve circulation and flushing.
Fisheries • 2017 • Technical Paper-II
Nitrogen content of Urea is :
A)
12-16%
B)
20-25 %
C)
16-30%
D)
44-46%
Urea CO(NH2)2 contains 44-46% nitrogen by weight.
Fisheries • 2017 • Technical Paper-II
Thelycum is the reproductive organ of:
A)
Male f/w prawn
B)
Female shrimp
C)
Male shrimp
D)
Female f/w prawn
Thelycum is sperm receptacle on ventral thorax of female penaeid shrimps.
Fisheries • 2017 • Technical Paper-II
Phytoplankton contain C:N:P in the ratio of:
A)
106:17:1
B)
75:16:2.4
C)
100:16:2.4
D)
75:17:2.4
Redfield C:N:P 106:16:1; option 106:17:1 closest among given.
Fisheries • 2017 • Technical Paper-II
Stocking density of fry rearing@nos/ha :
A)
6000-12000
B)
3-5 lakh
C)
60000-120000
D)
3-5 million
Fry rearing (fry to fingerling) density 3-5 lakh/ha; spawn to fry 30-50 lakh/ha (3-5 million).
Fisheries • 2017 • Technical Paper-II
Which one is not air breather?
A)
Fighter fish
B)
Tilapia fish
C)
Channa fish
D)
Clarius fish
Tilapia is not obligate air-breather; Channa, Clarias, Anabas (fighter) are air-breathing.
Fisheries • 2017 • Technical Paper-II
Which of the following ornamental fish has been reported for transgenesis?
A)
Esomus
B)
Angel fish
C)
Zebra fish
D)
Fighter fish
Zebra fish Danio rerio is primary model for ornamental fish transgenesis and GM fluorescent fish.
Fisheries • 2017 • Technical Paper-II
Is considered to be one of the most important limiting factors in the development of phytoplankton:
A)
Magnesium
B)
Calcium
C)
Nitrogen
D)
Potassium
Nitrogen is most limiting nutrient for phytoplankton growth in aquaculture ponds.
Fisheries • 2017 • Technical Paper-II
In prismatic compass, the zero marked on the :
A)
North
B)
West
C)
South
D)
East
In prismatic compass 0° is marked at south, 90° west, 180° north, 270° east; observations from south.
Fisheries • 2017 • Technical Paper-II
Aeration is doing in the pond water when DO becomes less than :
A)
70% of the saturation level
B)
50% of the saturation level
C)
60% of the saturation level
D)
90% of the saturation level
Aeration recommended when DO falls below 50% saturation (~3-4 ppm) for warmwater fish.
Fisheries • 2017 • Technical Paper-II
Which of the following aquatic plant is not a Floating weeds?
A)
Eichhornia
B)
Hydrilla
C)
Azolla
D)
Pistia
Hydrilla is submerged weed; Eichhornia, Pistia, Azolla are floating.
Fisheries • 2017 • Technical Paper-II
In integrated farming, construction of animal houses need…..% of the total farm land
A)
10
B)
25
C)
20
D)
30
In integrated fish-livestock farming, animal sheds/structures occupy ~10% of total farm area, rest for ponds/crops.
Fisheries • 2017 • Technical Paper-II
Zoogeographycally, the largest number of fish species occurs in the region of:
A)
Temperate region
B)
Arctic region
C)
Tropical region
D)
Antarctic region
Tropical region has highest fish diversity due to warm stable climate, high productivity and habitat heterogeneity; temperate/polar lower.
Fisheries • 2017 • Technical Paper-II
The line joining points of equal elevation is known as :
A)
Horizontal line
B)
Leval line
C)
Contour line
D)
All of these
Contour line joins equal elevation points.
Fisheries • 2017 • Technical Paper-II
Hatching time of Mahseer eggs at 22-24oC temperature:
A)
16 Hrs
B)
72 Hrs
C)
180 Hrs
D)
80-90Hrs
Mahseer (Tor spp) eggs hatch in 80-90 hrs at 22-24°C, longer than carps.
Fisheries • 2017 • Technical Paper-II
Density of the fish is :
A)
0.92 g/cm3
B)
0.98 g/cm3
C)
0.94 g/cm3
D)
1.0 g/cm3
Live fish density near water ~1.0 g/cm3, slightly less/more due to swim bladder.
Fisheries • 2017 • Technical Paper-II
Find the purine base :
A)
Uracil
B)
Thymine
C)
Guanine
D)
None of these
Purines: adenine, guanine; pyrimidines: uracil, thymine, cytosine.
Fisheries • 2017 • Technical Paper-II
Plankton sediment in cloth/ glass tube indicates good production of plankton:
A)
1-2 cc
B)
5 cc
C)
3-4 cc
D)
6-10 cc
Plankton net settlement 3-4 cc per filtered volume indicates good production; 1-2 average.
Fisheries • 2017 • Technical Paper-II
For air transport, the gross weight of the pack should not exceed………kg as per airline requirement
A)
30 kg
B)
20 kg
C)
10 kg
D)
40 kg
Airline/IATA limit for live-fish pack gross weight ~30 kg for passenger cargo.
