30 Questions
What is the main reason trash fish are no longer suitable for human consumption?
Poor handling
Why are some growers forced to be creative in sourcing animal protein for feeding crabs?
High cost of trash fish
What does the method of mudcrab pen culture in a mangrove area require?
Low investment
How do some growers engage in crab cultivation according to the text?
By purchasing rejected crabs from the market
What makes mudcrab pen culture a 'mangrove-friendly' aquaculture system?
Does not require cutting mangrove trees
What purpose do shallow trenches serve in the mudcrab pen culture method?
To provide shelters for crabs during low tide
Which shellfish are affected by the ban imposed during red tide blooms?
Oysters, mussels, and all other bivalves
What is the main reason for implementing a complete ban on harvesting and sale of oysters and mussels during red tide blooms?
To protect public health from potential poisoning
What is the impact of the shellfish ban on families relying on mussel and oyster production or trading?
It significantly disrupts their livelihood
Why was the culture of P.monodon considered only a secondary species before 1951?
Because only a relatively small quantity could be harvested with milkfish
Which shrimps are mentioned as being part of a mixed harvest with milkfish?
Jumbo tiger shrimp, white shrimps, and greasy-back shrimp
Why is there a higher interest in growing groupers despite the hatchery technology for grouper fingerling production not being at the commercial stage?
Because the cost to produce a kilogram of grouper is the same as seabass
Who first advocated the culture of P.monodon as a primary species in 1951?
Villadolid and Villaluz
What is the reason mentioned in the text for the late start of seabass and grouper culture in the Philippines?
Dependence on a constant supply of low-cost trash fish
What was one of the earliest attempts made by coastal fishers with live groupers that may have been rejected?
Fattening them in small cages
Why is there no trash fish as such in the Philippines according to the text?
Because all caught fish are consumed by Filipinos
What is an example of a size range mentioned for the market of grouper fingerlings and postfingerlings?
2-cm long to 15-cm long
What is one reason mentioned in the text for the diversity in the level of development of different species in the Philippine aquaculture industry?
Varying culture systems and ecosystems
What was the total aquaculture production in 1997?
957,546 mt
Which species experienced a drop of 44.6% in production due to frequent red tide occurrence?
Mussels
What technology development supports the need for the food requirements of cultured stocks?
Feed development
Which aquaculture system can harvest as much as 50,000 kilograms in an area measuring no more than 300 m2?
Intensive marine cages
What was the average annual growth rate of aquaculture production over the last ten years?
-5.42%
Which factor ensures the supply of available seed stock for aquaculture?
Hatchery development
What is one benefit of rooted plants in water bodies?
Serve as food for fish directly or indirectly
Why do rooted plants help clean up the water?
They precipitate silt and colloids in the water
What is one way rooted plants contribute to the ecosystem by providing shelter?
Providing hiding spots for predators
What can cause a turnover in water bodies with negative consequences like fish kill?
Strong winds or heavy rains
Why might heavy blooms of phytoplankton be harmful to fish?
They cause off flavor fish due to toxins
How do rooted plants reduce nutrients from fertile or polluted waters?
By contributing to nutrient accumulation in the water
Explore the reasons behind the higher interest in growing groupers compared to seabass despite similar production costs. Learn about the development stage of grouper fingerling production technology and the historical background of grouper farming.
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