30 Questions
What is the main reason why fish eat according to the provided text?
To obtain essential nutrients
Which of the following is NOT considered an essential amino acid for fish?
Alanine
Why are essential fatty acids important for fish's diets?
To ensure growth, development, and overall health
Why is it important to include specific sources of omega-3 and omega-6 fatty acids in a fish's feed?
To meet the fish's nutritional needs for growth and health
What is the role of vitamins in fish metabolism?
To serve as organic enzyme co-factors
Which of the following is NOT a source of nutrients that fish need for their diets, according to the text?
Chlorophyll
What is one factor that affects the cost of processing food?
Size of prey
What does Optimal Foraging Theory predict about prey size?
Optimal foraging predicts an optimal size range of prey.
Which cost is largely associated with processing protein according to the text?
Specific Dynamic Action (SDA)
How does predation risk influence the motivation to feed according to the text?
High predation risk may deter feeding.
Which factor decreases predation risk in terms of conspecifics?
Shoaling
What type of models add encounter frequency and success to determine optimal foraging size?
Modern models
Which type of fish invests more energy and less time foraging as a result of having increased control and protective ability?
Nesters
What type of fish sacrifices hydrodynamic efficiency and inherits a greater predator risk, but gains increased protection and control on gestation?
External bearers
Which type of fish includes species like Chromis chromis and Pomoxis annularis?
Substrate choosers
What is the characteristic of fish classified as 'miscellaneous materials' nesters?
They use random plant material for nesting.
Which fish species would most likely be a 'mouthbrooder' based on the given information?
Guarders
What distinguishes 'skin breeders', such as Oryzias latipes, from other types of bearers?
They carry their eggs on their skin.
Which mode of fertilization involves touching cloacae and transferring sperm?
Cloacal
In which type of reproductive system do individuals within a species exist as distinct male and female sexes?
Gonochoristic sexes
Which environmental factor usually results in more males in terms of sex determination?
Increased temperatures
What is the mode of fertilization where eggs are usually pelagic and plankton-like, with low male investment?
External
Which pattern of sex changes refers to the male being dominant first, followed by one dominant female and multiple males?
Protandry
In which mode of fertilization do catfish drink sperm but do not consume it?
Cloacal
What is the relationship between search speed and foraging modes in fish?
Search speed is expensive but can yield food in various foraging modes.
How does prey selection relate to food webs and ecosystems?
Prey selection impacts food webs and the human impact on ecosystems.
What is the difference between top-down and bottom-up regulation in food webs?
Top-down regulation involves predation effects on trophic systems.
Which type of spawner releases eggs into the water column instead of depositing them onto the substrate?
Pelagic spawners like Gadus morhua (Cod)
In reproductive ecology, what characterizes benthic spawners on coarse substrates?
They have pelagic free embryos and larvae.
According to Henry David Thoreau, what did he believe in?
"I believe I’ll go fishing."
This study guide outlines Trophic Ecology for Fish Biology Exam #2, covering topics like the definition of food, reasons why fish eat, and essential amino acids. It includes a brief review and key concepts for understanding food consumption in fish.
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