Paper 1 Question 51 Single Answer
Which plankton group serves as the primary natural food for carp fry during the nursery phase?
A Benthos B Macrophytes C Nekton D Zooplankton Show Answer
Question 52 Single Answer
Rotifers are especially important in nursery ponds because they?
A Consume fish eggs B Increase pond acidity C Are ideal live food for early fish larvae D Eliminate phytoplankton Show Answer
Question 53 Single Answer
Which phytoplankton group is generally considered most beneficial for freshwater fish ponds?
A Diatoms B Cyanobacteria C Dinoflagellates D Euglenoids Show Answer
Question 54 Single Answer
The green colour of productive fish ponds mainly indicates the abundance of?
A Fungi B Protozoa C Phytoplankton D Molluscs Show Answer
Question 55 Single Answer
Which nutrient is most commonly responsible for excessive eutrophication in freshwater ponds?
A Iron B Sodium C Nitrogen and phosphorus D Calcium only Show Answer
Question 56 Single Answer
Which method is commonly used for estimating plankton density in aquaculture ponds?
A BOD analysis B Plankton net filtration C Hydrometer test D Kjeldahl digestion Show Answer
Question 57 Single Answer
Which water quality parameter is directly measured using Winkler's method?
A pH B Alkalinity C Total hardness D Dissolved oxygen Show Answer
Question 58 Single Answer
Which factor primarily affects the solubility of oxygen in freshwater?
A Fish colour B Soil texture C Pond shape D Water temperature Show Answer
Question 59 Single Answer
As water temperature increases, dissolved oxygen concentration generally?
A Increases B Remains unchanged C Decreases D Doubles Show Answer
Question 60 Single Answer
Which gas is released during decomposition of organic matter under anaerobic conditions?
A Oxygen B Ozone C Nitrogen D Hydrogen sulphide Show Answer
Question 61 Single Answer
Which fertilizer is commonly used to increase nitrogen availability in fish ponds?
A Muriate of potash B Urea C Rock phosphate D Gypsum Show Answer
Question 62 Single Answer
Single Super Phosphate mainly provides?
A Nitrogen B Potassium C Magnesium D Phosphorus Show Answer
Question 63 Single Answer
Which organic manure generally contains the highest nitrogen content?
A Farmyard manure B Poultry manure C Rice straw D Sawdust Show Answer
Question 64 Single Answer
Excessive application of organic manure may result in?
A Improved oxygen level throughout the day B Oxygen depletion due to decomposition C Permanent increase in pH above 10 D Elimination of plankton Show Answer
Question 65 Single Answer
Liming should preferably be carried out?
A Immediately after stocking fish seed B After harvesting only C During heavy rainfall D Before manuring Show Answer
Question 66 Single Answer
Which lime reacts fastest with acidic pond soil?
A Dolomite B Agricultural lime C uick lime D Marl Show Answer
Question 67 Single Answer
The primary objective of liming in acidic ponds is to?
A Increase ammonia toxicity B Increase water turbidity C Destroy beneficial plankton D Improve nutrient availability Show Answer
Question 68 Single Answer
Which parameter is most useful in determining lime requirement?
A Pond depth B Fish weight C Soil pH D Water transparency only Show Answer
Question 69 Single Answer
Which aquatic weed is an emergent weed?
A Azolla B Hydrilla C Lemna D Typha Show Answer
Question 70 Single Answer
Lemna is commonly known as?
A Water lily B Cattail C Tape grass D Duckweed Show Answer
Question 71 Single Answer
Salvinia belongs to which category of aquatic weeds?
A Submerged B Floating C Emergent D Rooted submerged Show Answer
Question 72 Single Answer
Biological control of aquatic weeds often involves the use of?
A Crustaceans B Predatory birds C Carnivorous insects D Herbivorous fishes Show Answer
Question 73 Single Answer
Grass carp is widely used for controlling?
A Floating plastics B Bottom sludge C Water salinity D Aquatic vegetation Show Answer
Question 74 Single Answer
Which fish species is particularly effective against submerged weeds?
A Silver carp B Catla C Grass carp D Rohu Show Answer
Question 75 Single Answer
Excessive aquatic weeds mainly reduce fish production because they?
A Increase natural food availability continuously B Improve aeration C Compete for nutrients and oxygen D Increase harvesting efficiency Show Answer
Question 76 Single Answer
Which aquatic weed interferes most seriously with sunlight penetration?
A Vallisneria B Chara C Water hyacinth D Nitella Show Answer
Question 77 Single Answer
Predatory fishes in nursery ponds mainly affect?
A Brood fish only B Plankton growth C Water alkalinity D Fry survival Show Answer
Question 78 Single Answer
Which of the following is considered a predatory freshwater fish?
A Labeo rohita B Catla catla C Channa striata D Cirrhinus mrigala Show Answer
Question 79 Single Answer
Weed fishes primarily reduce aquaculture productivity by?
A Competing for food and space B Increasing dissolved oxygen C Producing fertilizers D Improving pond ecology Show Answer
Question 80 Single Answer
Tea seed cake is commonly used in pond preparation because it acts as?
A Piscicide B Growth promoter C Water conditioner D Antibiotic Show Answer
Question 81 Single Answer
Which characteristic distinguishes nursery ponds from grow-out ponds?
A Nursery ponds are deeper B Nursery ponds require no fertilization C Nursery ponds have higher salinity D Nursery ponds have smaller area and shallow depth Show Answer
Question 82 Single Answer
The ideal depth of a nursery pond generally ranges between?
A 3–5 m B 0.8–1.2 m C 6–8 m D Above 10 m Show Answer
Question 83 Single Answer
Which practice minimizes the entry of unwanted fish into culture ponds?
A Increasing pond depth B Installing screened inlets C Reducing lime application D Eliminating fertilization Show Answer
Question 84 Single Answer
Which structure regulates water level in fish ponds?
A Chimney B Spillway and sluice gate C Windmill D Hatchery jar Show Answer
Question 85 Single Answer
Overflow structures in ponds mainly prevent?
A Fish feeding B Liming C Flood damage and fish escape D Plankton production Show Answer
Question 86 Single Answer
Which parameter is most directly affected by excessive rainfall?
A Fish species B Water pH and alkalinity C Pond size D Soil texture Show Answer
Question 87 Single Answer
Heavy rainfall in freshwater ponds generally causes?
A Complete elimination of plankton B Increase in salinity C Permanent increase in hardness D Sudden dilution of nutrients Show Answer
Question 88 Single Answer
Which water quality parameter indicates the buffering capacity against sudden pH changes?
A Colour B Transparency C Alkalinity D Salinity Show Answer
Question 89 Single Answer
Which fish culture practice helps maintain stable water quality?
A Overstocking B Balanced fertilization and feeding C Excessive manure application D Continuous drainage Show Answer
Question 90 Single Answer
Which phenomenon causes oxygen supersaturation during bright sunny afternoons?
A Photosynthesis by phytoplankton B Excessive respiration C Fish harvesting D Bottom sludge decomposition Show Answer
Question 91 Single Answer
Which pond management activity should be avoided during periods of very low dissolved oxygen?
A Aeration B Heavy feeding C Water exchange D Monitoring Show Answer
Question 92 Single Answer
Which indicator best reflects healthy pond productivity?
A Completely transparent water B Black foul-smelling water C Thick floating weed cover D Moderate plankton bloom Show Answer
Question 93 Single Answer
Which factor is most responsible for fluctuations in pond pH during a 24-hour cycle?
A Fish migration B Water depth only C Soil texture D Photosynthesis and respiration Show Answer
Question 94 Single Answer
Carbon dioxide concentration in pond water is generally highest during?
A Noon B Early morning C Afternoon D Sunset Show Answer
Question 95 Single Answer
Which management practice helps reduce ammonia accumulation?
A Proper feeding and aeration B Overstocking fish C Excessive fertilization D Eliminating plankton Show Answer
Question 96 Single Answer
Reservoir fisheries differ from pond aquaculture because reservoirs are primarily?
A Artificial cement tanks B Large open water ecosystems C Underground water bodies D Saline water systems Show Answer
Question 97 Single Answer
Cage culture in reservoirs mainly utilizes?
A Confined floating enclosures B Earthen ponds C Cement tanks D Hatchery troughs Show Answer
Question 98 Single Answer
Resource mapping in freshwater aquaculture primarily assists in?
A Measuring atmospheric pressure B Increasing sea fishing C Estimating marine biodiversity only D Identifying suitable water bodies for fish production Show Answer
Question 99 Single Answer
Sustainable freshwater aquaculture emphasizes?
A Maximum chemical use B Environmental conservation with profitable production C Elimination of all aquatic plants D Harvesting juvenile fish only Show Answer
Question 100 Single Answer
The ultimate objective of scientific pond management is to?
A Increase production while maintaining ecological balance B Maximize fertilizer application irrespective of water quality C Eliminate all microorganisms from ponds D Maintain permanently turbid water Show Answer
Question 101 Single Answer
Which type of reservoir generally has the highest potential for cage aquaculture?
A Ephemeral reservoir B Seasonal village pond C Deep perennial reservoir D Flooded paddy field Show Answer
Question 102 Single Answer
Which factor is most critical while selecting a site for cage culture in reservoirs?
A High wave action B Very shallow depth C Maximum aquatic weed cover D Adequate water exchange Show Answer
Question 103 Single Answer
Which aquatic ecosystem generally exhibits the highest carrying capacity for fish culture?
A Poorly managed acidic pond B Temporary roadside ditch C Polluted drainage canal D Well-managed fertilized pond Show Answer
Question 104 Single Answer
Carrying capacity of a pond refers to?
A Maximum depth of water B Number of aquatic weeds C uantity of pond soil D Maximum sustainable fish biomass Show Answer
Question 105 Single Answer
Which management practice directly improves carrying capacity?
A Overstocking without aeration B Maintaining optimum water quality C Eliminating plankton D Increasing pond acidity Show Answer
Question 106 Single Answer
Which indicator most accurately reflects excessive organic pollution in ponds?
A Pleasant earthy smell B High transparency C Moderate green water D Black anaerobic bottom sludge Show Answer
Question 107 Single Answer
Which microbial process converts ammonia into nitrite?
A Nitrification B Denitrification C Sulphur oxidation D Methanogenesis Show Answer
Question 108 Single Answer
Which bacteria are mainly responsible for nitrification in aquaculture ponds?
A Nitrosomonas B Rhizobium C Lactobacillus D Bacillus anthracis Show Answer
Question 109 Single Answer
Nitrite is converted into nitrate mainly by?
A Vibrio B Azotobacter C Clostridium D Nitrobacter Show Answer
Question 110 Single Answer
Which nitrogen compound is least toxic to cultured fish?
A Nitrate B Nitrite C Unionized ammonia D Ammonia gas Show Answer
Question 111 Single Answer
The major source of natural food in fertilized ponds is?
A Concrete lining B Pond embankment C Plankton bloom D Fish scales Show Answer
Question 112 Single Answer
Which factor determines the frequency of fertilizer application in ponds?
A Water productivity and plankton density B Fish colour C Number of labourers D Pond fencing Show Answer
Question 113 Single Answer
Excessive liming in alkaline ponds may result in?
A Elevated pH beyond desirable limits B Better nutrient balance C Reduced calcium concentration D Increased dissolved oxygen permanently Show Answer
Question 114 Single Answer
Which parameter is measured using a pH meter?
A Turbidity B Chlorophyll content C Dissolved oxygen D Hydrogen ion concentration Show Answer
Question 115 Single Answer
Fish generally exhibit surface gasping when?
A Water temperature decreases slightly B Dissolved oxygen becomes critically low C Alkalinity increases moderately D Transparency improves Show Answer
Question 116 Single Answer
Emergency aeration is most effective when applied?
A At noon every day regardless of need B During early morning oxygen depletion C Before pond preparation D During harvesting only Show Answer
Question 117 Single Answer
Which pond preparation practice reduces disease-causing organisms?
A Increasing turbidity B Overstocking C Continuous feeding D Liming and drying Show Answer
Question 118 Single Answer
Which fish species is mainly planktivorous among Indian Major Carps?
A Common carp B Mrigal C Catla D Grass carp Show Answer
Question 119 Single Answer
Rohu primarily feeds in which zone of the pond?
A Surface column B Shore vegetation only C Bottom sediment only D Middle water column Show Answer
Question 120 Single Answer
Mrigal is predominantly a?
A Surface feeder B Column feeder C Bottom feeder D Predatory feeder Show Answer
Question 121 Single Answer
Composite fish culture utilizes different feeding niches mainly to?
A Increase competition B Reduce fish growth C Maximize ecological resource utilization D Increase weed infestation Show Answer
Question 122 Single Answer
Which parameter should be monitored most frequently in intensive freshwater aquaculture?
A Pond boundary length B Dissolved oxygen C Soil colour D Wind direction Show Answer
Question 123 Single Answer
Which condition favors the development of blue-green algae?
A Rapid flowing cold streams B Nutrient-rich stagnant water C High salinity water D Very acidic water Show Answer
Question 124 Single Answer
Which management measure is effective in preventing eutrophication?
A Excessive organic loading B Controlled fertilizer application C Continuous overfeeding D Elimination of water exchange Show Answer
Question 125 Single Answer
Which water quality parameter is commonly measured using EDTA titration?
A Dissolved oxygen B Salinity C Hardness D Ammonia Show Answer
Question 126 Single Answer
Fish mortality caused by oxygen depletion is most likely after?
A Winter season alone B Bright sunny weather C Moderate rainfall D Consecutive cloudy days Show Answer
Question 127 Single Answer
Which process consumes the greatest amount of dissolved oxygen in ponds at night?
A Photosynthesis B Water exchange C Rainfall D Respiration by aquatic organisms Show Answer
Question 128 Single Answer
Which factor contributes most to diurnal fluctuation of dissolved oxygen?
A Atmospheric pressure only B Photosynthesis and respiration C Pond shape D Fish species alone Show Answer
Question 129 Single Answer
The optimum transparency for productive carp ponds generally ranges between?
A 150–200 cm B 20–40 cm C Above 300 cm D Less than 5 cm Show Answer
Question 130 Single Answer
Which condition indicates over-fertilization of a pond?
A Moderate green colour B Stable dissolved oxygen C Extremely dense algal bloom with poor transparency D Moderate plankton density Show Answer
Question 131 Single Answer
Which management strategy best prevents pond acidification?
A Elimination of plankton B Continuous addition of organic waste C Periodic liming based on soil analysis D Overfeeding fish Show Answer
Question 132 Single Answer
Which parameter should be checked before applying lime to ponds?
A Fish body weight B Soil and water pH C Number of aquatic insects D Water colour only Show Answer
Question 133 Single Answer
Reservoir enhancement fisheries mainly depend upon?
A High salinity management B Daily draining of reservoirs C Stocking quality fish seed D Continuous harvesting of juveniles Show Answer
Question 134 Single Answer
Which practice improves fish seed survival immediately after stocking?
A Increasing turbidity B Immediate heavy feeding C Acclimatization of seed D Draining pond water Show Answer
Question 135 Single Answer
Thermal stratification is more common in?
A Cement tanks only B Shallow nursery ponds C Paddy fields D Deep reservoirs Show Answer
Question 136 Single Answer
Which water layer generally contains the lowest dissolved oxygen in stratified reservoirs?
A Epilimnion B Littoral zone C Surface film D Hypolimnion Show Answer
Question 137 Single Answer
Which process mixes oxygen-rich surface water with deeper layers?
A Thermal overturn B Eutrophication C Sedimentation D Denitrification Show Answer
Question 138 Single Answer
Which freshwater resource in India has the greatest potential for inland fisheries expansion?
A Desert dunes B Coral reefs C Reservoirs D Mangrove forests Show Answer
Question 139 Single Answer
Which pond management practice minimizes seepage losses?
A Removing embankments B Increasing aquatic weeds C Proper soil compaction D Excessive liming Show Answer
Question 140 Single Answer
Which embankment feature reduces erosion during heavy rainfall?
A Uncontrolled burrows B Deep cracks C Loose sandy soil D Proper grass cover Show Answer
Question 141 Single Answer
Which burrowing animal commonly damages fish pond embankments?
A Earthworm B Honeybee C Butterfly D Crab Show Answer
Question 142 Single Answer
Which routine management activity helps detect water quality problems at an early stage?
A Periodic monitoring B Random harvesting C Delayed sampling D Irregular feeding Show Answer
Question 143 Single Answer
Which parameter is commonly monitored using a Secchi disc?
A Dissolved carbon dioxide B Water transparency C Total hardness D Chloride concentration Show Answer
Question 144 Single Answer
Which practice best supports environmentally sustainable freshwater aquaculture?
A Disposal of untreated waste into ponds B Unlimited pesticide application C Judicious use of fertilizers and chemicals D Overstocking beyond carrying capacity Show Answer
Question 145 Single Answer
Which principle is fundamental to integrated pond management?
A Ignoring biological productivity B Eliminating all aquatic plants C Balancing soil, water, and fish health D Avoiding water quality monitoring Show Answer
Question 146 Single Answer
Which factor primarily determines the productivity classification of freshwater ponds?
A Distance from market B Number of embankments C Pond ownership D Biological productivity Show Answer
Question 147 Single Answer
Mesotrophic ponds are characterized by?
A Extremely nutrient-poor conditions B Moderate nutrient status and productivity C Very high salinity D Absence of plankton Show Answer
Question 148 Single Answer
Oligotrophic freshwater ponds generally exhibit?
A Excessive organic pollution B Dense algal blooms C Low nutrient concentration D High ammonia toxicity Show Answer
Question 149 Single Answer
Eutrophic ponds are generally characterized by?
A Extremely clear water with poor fertility B Very low plankton production C High nutrient availability and high biological productivity D High salinity and low fish production Show Answer
Question 150 Single Answer
Scientific freshwater aquaculture management ultimately aims to?
A Increase chemical inputs without water quality assessment B Maximize fish stocking irrespective of carrying capacity C Eliminate all plankton from production ponds D Achieve sustainable high fish production while maintaining environmental quality Show Answer
Question 151 Single Answer
What is the primary characteristic that distinguishes a reservoir from a natural lake?
A Artificial impoundment of river water B Presence of marine species C Permanent tidal influence D High salinity Show Answer
Question 152 Single Answer
Reservoir fisheries in India are primarily categorized under?
A Inland open water fisheries B Marine aquaculture C Ornamental fisheries D Brackishwater aquaculture Show Answer
Question 153 Single Answer
Which factor is most commonly used for the classification of reservoirs?
A Water colour B Altitude only C Number of fish species D Surface area Show Answer
Question 154 Single Answer
According to the commonly followed Indian classification, a medium reservoir generally has a water spread area of?
A Less than 100 ha B 100–1,000 ha C 1,000–5,000 ha D 5,000–10,000 ha Show Answer
Question 155 Single Answer
Large reservoirs generally have a water spread area of?
A Below 50 ha B 500–1,000 ha C 100–500 ha D Above 5,000 ha Show Answer
Question 156 Single Answer
Which zone of a reservoir is generally the most productive for fisheries?
A Profundal zone B Littoral zone C Abyssal zone D Hadal zone Show Answer
Question 157 Single Answer
The littoral zone of a reservoir is characterized by?
A Complete absence of sunlight B No biological activity C Extremely high salinity D Shallow water supporting rooted vegetation Show Answer
Question 158 Single Answer
Which ecological factor most directly affects primary productivity in reservoirs?
A Latitude only B Availability of nutrients C Dam height only D Wind direction only Show Answer
Question 159 Single Answer
Reservoir productivity is primarily driven by?
A Fish migration B Phytoplankton photosynthesis C Wave action D Dam construction material Show Answer
Question 160 Single Answer
The trophic status of a reservoir mainly depends on?
A Reservoir name B Ownership pattern C Nutrient concentration D Number of villages nearby Show Answer
Question 161 Single Answer
Which trophic category has the lowest biological productivity?
A Eutrophic B Oligotrophic C Mesotrophic D Hypertrophic Show Answer
Question 162 Single Answer
Eutrophic reservoirs are characterized by?
A Low nutrient concentration B Absence of aquatic vegetation C Very low fish yield D High plankton productivity Show Answer
Question 163 Single Answer
Mesotrophic reservoirs are generally considered?
A Highly saline B Completely unproductive C Moderately productive D Marine ecosystems Show Answer
Question 164 Single Answer
Which biological indicator is commonly used to assess reservoir productivity?
A Plankton abundance B Sand percentage C Concrete thickness D Dam age Show Answer
Question 165 Single Answer
Which plankton group forms the primary producers in reservoirs?
A Zooplankton B Benthos C Phytoplankton D Molluscs Show Answer
Question 166 Single Answer
Zooplankton mainly function as?
A Decomposers B Primary producers C Primary consumers D Apex predators Show Answer
Question 167 Single Answer
Which benthic organism contributes significantly to the natural food chain in reservoirs?
A Chironomid larvae B Tuna C Coral polyps D Sea cucumber Show Answer
Question 168 Single Answer
Which physical factor has the greatest influence on thermal stratification?
A Fish density B Reservoir depth C Dam colour D Wind speed alone Show Answer
Question 169 Single Answer
Thermal stratification is most common during?
A Heavy floods B Winter overturn C Summer D Continuous rainfall Show Answer
Question 170 Single Answer
The upper warm layer of a stratified reservoir is known as?
A Hypolimnion B Metalimnion C Epilimnion D Benthic zone Show Answer
Question 171 Single Answer
The metalimnion is also called the?
A Thermocline B Compensation layer C Aphotic zone D Pelagic zone Show Answer
Question 172 Single Answer
The deepest cold layer of a stratified reservoir is known as?
A Littoral zone B Hypolimnion C Epilimnion D Riparian zone Show Answer
Question 173 Single Answer
Which layer usually has the lowest dissolved oxygen during summer stratification?
A Epilimnion B Surface film C Hypolimnion D Shoreline Show Answer
Question 174 Single Answer
Reservoir overturn generally occurs due to?
A Increased rainfall only B Fish migration C Cage culture D Seasonal temperature changes Show Answer
Question 175 Single Answer
Which factor most strongly affects fish production in reservoirs?
A Nutrient availability B Dam colour C Road connectivity D Reservoir ownership Show Answer
Question 176 Single Answer
Reservoir fisheries mainly depend upon?
A Shrimp hatcheries B Deep-sea trawling C Capture-based enhancement D Pearl culture Show Answer
Question 177 Single Answer
Stock enhancement in reservoirs primarily involves?
A Stocking quality fish seed B Removing fingerlings C Increasing aquatic weeds D Reducing plankton Show Answer
Question 178 Single Answer
Which stage of fish seed is generally preferred for reservoir stocking?
A Fertilized eggs B Fingerlings C Spawn D Larvae Show Answer
Question 179 Single Answer
Fingerlings are preferred because they?
A Cannot migrate B Require no acclimatization C Have higher survival than spawn D Grow without food Show Answer
Question 180 Single Answer
Which factor should be considered before reservoir stocking?
A Number of tourists B Colour of fish C Carrying capacity D Dam height only Show Answer
Question 181 Single Answer
Overstocking a reservoir generally results in?
A Better growth B Permanent oxygen increase C Increased competition for food D Elimination of predators Show Answer
Question 182 Single Answer
Which Indian Major Carp is mainly a surface feeder?
A Catla B Rohu C Mrigal D Common carp Show Answer
Question 183 Single Answer
Rohu mainly occupies which feeding niche?
A Surface B Shore vegetation C Bottom D Middle column Show Answer
Question 184 Single Answer
Mrigal primarily feeds in the?
A Surface water B Middle water C Bottom zone D Floating vegetation Show Answer
Question 185 Single Answer
Composite stocking in reservoirs aims to?
A Increase interspecific competition B Utilize all ecological niches efficiently C Reduce fish diversity D Eliminate natural food Show Answer
Question 186 Single Answer
Which exotic carp mainly feeds on phytoplankton?
A Common carp B Grass carp C Silver carp D Black carp Show Answer
Question 187 Single Answer
Grass carp is mainly introduced for?
A Mollusc control B Aquatic weed utilization C Zooplankton feeding D Predator control Show Answer
Question 188 Single Answer
Which factor influences survival immediately after stocking?
A Reservoir depth only B Fish colour C Acclimatization D Dam age Show Answer
Question 189 Single Answer
The best time for stocking reservoirs is generally?
A During oxygen depletion B During severe drought C During complete drawdown D When food availability is adequate Show Answer
Question 190 Single Answer
Which technological advancement is increasingly used for reservoir fish resource assessment?
A Stone markers B Mechanical weighing only C Manual counting only D Remote sensing Show Answer
Question 191 Single Answer
GIS technology is mainly used in reservoir management for?
A Feed preparation B Fish vaccination C Fish breeding D Mapping aquatic resources Show Answer
Question 192 Single Answer
Hydroacoustic survey techniques are mainly used to estimate?
A Fish diseases B Water pH C Soil fertility D Fish abundance Show Answer
Question 193 Single Answer
Which modern device helps in locating fish shoals?
A Hygrometer B Barometer C Sonar D Spectrometer Show Answer
Question 194 Single Answer
Which parameter is commonly monitored using satellite imagery in reservoirs?
A Feed conversion ratio B Fish age C Water spread area D Gill colour Show Answer
Question 195 Single Answer
Reservoir conservation aims primarily to?
A Sustain fish biodiversity B Eliminate native fishes C Increase pollution D Promote overfishing Show Answer
Question 196 Single Answer
Which management approach supports sustainable reservoir fisheries?
A Unlimited harvesting B Regulated fishing effort C Juvenile fish capture D Habitat destruction Show Answer
Question 197 Single Answer
Which practice is essential for conserving indigenous fish species?
A Continuous dredging B Habitat protection C Overstocking exotics D Removal of spawning grounds Show Answer
Question 198 Single Answer
Fish sanctuaries in reservoirs primarily serve to?
A Protect breeding populations B Increase pollution C Restrict plankton growth D Reduce water storage Show Answer
Question 199 Single Answer
Which factor is most responsible for declining fish biodiversity in reservoirs?
A Scientific management B Balanced stocking C Habitat degradation D Controlled fishing Show Answer
Question 200 Single Answer
The primary objective of scientific reservoir aquaculture management is to?
A Achieve sustainable enhancement of fish production while conserving aquatic biodiversity B Eliminate all native fish species C Maximize fishing without stock assessment D Increase stocking irrespective of carrying capacity Show Answer
