Fisheries • 2017 • Technical Paper-II
The number of individuals an environment can support without significant negative impacts to the given organism and its environment:
A)
Carrying capacity
B)
Standing crop
C)
Ecosystem
D)
Ecological habitats
Carrying capacity is maximum population size environment can sustain without degradation.
Fisheries • 2017 • Technical Paper-II
The maximum time for filling a pond is:
A)
1 week
B)
3 weeks
C)
2 weeks
D)
4 weeks
Pond filling should be completed quickly within ~1 week to avoid seepage and weed growth.
Fisheries • 2017 • Technical Paper-II
Order of Moina (zooplankton) is :
A)
Cladocera
B)
Anostraca
C)
Arthropoda
D)
Copepoda
Moina is a cladoceran water flea, order Cladocera, class Branchiopoda.
Fisheries • 2017 • Technical Paper-II
The development of embryos without genetic contribution from the male parent is:
A)
Androgenesis
B)
Haploidy
C)
Gynogenesis
D)
Polyploidy
Gynogenesis: embryo develops with maternal genome only, male only triggers division.
Fisheries • 2017 • Technical Paper-II
1 hectare fish pond equal:
A)
7.5 bigha
B)
4.2 bigha
C)
6.17 bigha
D)
5.6 bigha
1 hectare =2.471 ac; Mizoram bigha ~0.133 ha => ~7.5 bigha per ha.
Fisheries • 2017 • Technical Paper-II
Brine shrimp is related to:
A)
Artemia
B)
Rotifers
C)
Daphnia
D)
Lerneae
Brine shrimp = Artemia, important live feed in aquaculture.
Fisheries • 2017 • Technical Paper-II
Order of Artemia is :
A)
Notostraca
B)
Copepoda
C)
Anostraca
D)
Arthropoda
Artemia brine shrimp belongs to order Anostraca (fairy shrimps), class Branchiopoda.
Fisheries • 2017 • Technical Paper-II
Ideal stocking density for shrimp in nursery is :
A)
40 PL/m3
B)
100 PL/m3
C)
60 PL/m3
D)
150 PL/m3
Shrimp PL nursery ideal ~100 PL/m3 (intensive vannamei nursery 100-150; extensive 40-60). Common textbook answer 100 PL/m3.
Fisheries • 2017 • Technical Paper-II
In integrated aquaculture, number of poultry bird needed/ ha:
A)
100-200
B)
50-100
C)
200-300
D)
500-600
Fish-poultry integration standard is 500-600 birds/ha to provide enough manure for plankton.
Fisheries • 2017 • Technical Paper-II
Maturity of male mahseer is:
A)
1-3 years
B)
3+ years
C)
2 years
D)
5+ years
Male mahseer mature relatively late at 3+ years due to large size.
Fisheries • 2017 • Technical Paper-II
Find the perimeter of rectangular fish pond having 60m lengths and 40m widths?
A)
4800m
B)
200m
C)
480m
D)
3600m
Perimeter =2*(L+W)=2*(60+40)=200 m.
Fisheries • 2017 • Technical Paper-II
The larvae of f/w prawns require one of the following salinity ranges for metamorphosis:
A)
0 ppt
B)
10-20 ppt
C)
20-30 ppt
D)
30-35 ppt
M. rosenbergii freshwater prawn larvae are euryhaline and need 10-20 ppt (12-15 ppt optimum) for metamorphosis.
Fisheries • 2017 • Technical Paper-II
Which type of area measures give the most accurate result?
A)
Mid –ordinate rule
B)
Simpson’s rule
C)
Trapezoidal rule
D)
None of these
Simpson's rule most accurate, followed by trapezoidal, then mid-ordinate rule for irregular areas.
Fisheries • 2017 • Technical Paper-II
The organic soils having more than:
A)
10% organic constituents
B)
20% organic constituents
C)
15% organic constituents
D)
25% organic constituents
Organic soils (Histosols) defined as >20% organic carbon (≈12-18% OM depending on clay); textbook uses 20%.
Fisheries • 2017 • Technical Paper-II
Which of the following chlorine agent is widely used in the fish processing plant/prawn hatchery of India?
A)
Calcium hypochlorite
B)
Chloramines
C)
Sodium hypochlorite
D)
Chlorine dioxide
Calcium hypochlorite widely used stable chlorine disinfectant in hatcheries.
Fisheries • 2017 • Technical Paper-II
What is the main purpose of constructing berm?
A)
Soil erosion
B)
Strengthening of pond
C)
Netting
D)
Feeding
Berm is a horizontal ledge left on dyke to prevent soil erosion and wave wash-out and provide stability.
Fisheries • 2017 • Technical Paper-II
True short food chain carp :
A)
Grass carp
B)
Rohu
C)
Silver carp
D)
Catla
Grass carp feeds directly on macrophytes, shortest food chain, most efficient energy conversion.
Fisheries • 2017 • Technical Paper-II
Stocking density of Mahua Oil Cake in a hectare pond is :
A)
1000 kg
B)
2000 kg
C)
1500 kg
D)
2500 kg
Mahua oil cake used as piscicide @2500 kg/ha for 1m depth water to kill unwanted fish.
Fisheries • 2017 • Technical Paper-II
Stocking density of catfish brooder:
A)
1-2/m2
B)
5-6/m2
C)
2-3/m2
D)
5-10/m2
Catfish brooders kept at low density 1-2/m2 or even 0.5/m2 to avoid stress and ensure gonadal maturation.
Fisheries • 2017 • Technical Paper-II
The connective tissue which covers the muscle fibres are called :
A)
Perimysium
B)
Epimysium
C)
Endomysium
D)
None of these
Endomysium covers individual muscle fiber, perimysium covers fascicle (bundle), epimysium whole muscle.
Fisheries • 2017 • Technical Paper-II
The farmers who has land holding between 1-2 hectares is known as :
A)
Optimal farmers
B)
Small farmers
C)
Marginal farmers
D)
None of these above
Marginal <1 ha, Small 1-2 ha, Semi-medium 2-4 ha, Medium 4-10 ha.
Fisheries • 2017 • Technical Paper-II
Which of the following band is a light band?
A)
A-Band
B)
M-Band
C)
Z-Band
D)
H-Band
I-band is main light band; among options H-band is light central zone of A-band. Textbook lists H-band as light.
Fisheries • 2017 • Technical Paper-II
Which of the following fish species are comes under Live fishes?
A)
Guppy
B)
Magur
C)
Sword tail
D)
All of these
In Indian fisheries 'live fishes' are obligate air-breathing fishes: Magur (Clarias), Singhi, Anabas. Guppy/Swordtail are aquarium live-bearers, not in this category.
Fisheries • 2017 • Technical Paper-II
The area of pond is 50m × 20m × 1.5m .The volume of the pond( in gallon):
A)
11250
B)
12500
C)
1500
D)
10000
Volume = 50*20*1.5=1500 m³; MCQ lists that numeric value as 1500, treating m³ as gallon due to misprint.
Fisheries • 2017 • Technical Paper-II
Fertilization is the fusion of male and female gametes followed by the joining of:
A)
Cells
B)
Cytoplasm
C)
Nucleus
D)
Mitochondria
Fertilization = syngamy: fusion of cytoplasms followed by karyogamy (fusion of male and female pronuclei).
