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Discuss why 200kg Pacific halibut and 200kg Dall’s porpoise differ in their mass-specific
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- Dippers (Cinclus cinclus) are small birds that can be found along fast-flowing streams in Europe and Asia. They feed on insect larvae, especially those of caddis flies (Trichoptera), which they catch by sticking their heads under water and turning over stones. Describe the relationship between the abundance of caddis fly larvae and dippers?Why, is caddis fly larva abundance expressed as ‘relative abundance’? using the data in Table 2Old People e = 100 calories λ = 10 per night h = 2 hours Middle Aged People e = 400 calories λ = 20 per night h = 5 hours Young Adults e = 300 calories λ = 10 per night h = 2.5 hours Suppose that the organism need 1000 calories per night. - Which food item should the organism prefer, and which ones would you expect them to eat on a regular basis? Explain why and show calculations. - Explain marginal value theorem, and how it might relate to an organisms foraging decisions. - λ for Old People should increase in the coming years. How could that affect this organisms feeding on humans?The following graph shows enzymes activity for three different enzymes in the mamalian digestive system . PLEASE IN 10 MINS
- Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. In area 2, stomach content data of oxpeckers showed they consumed ~400 ticks per day. Cows were infested experimentally with large numbers of tick larvae and then oxpeckers were introduced at different stages in the tick life cycle (larvae; nymph; adult). They counted the number of adult ticks that dropped off the…Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. Given the data described in the introduction to this section, what effect do African mammals have on oxpeckers a) Positive b) negative c) neutralIn the graph, what is the carrying capacity of the deer in this particular environment?
- Marine invertebrates are also sources of marine natural products (secondary metabolites).Explain why marine invertebrates are rich of secondary metabolites!On the lush exomoon Pandora, scientists found a type of frog call the “balbasaur frog” whose males capture and present fluorescent pink “woodsprite” (a jellyfish-like flying invertebrate) to females during courtship. Scientists have made a few other observations about this system. (1) The woodsprite contains a microelement that is highly nutritious for the frogs. (2) The woodsprite are erratic flyers and only male frogs with the best hunting skills can capture them. (3) Female frogs live in dark caves and hunt cave-dwelling worms that are pink. (4) Females prefer males that present woodsprite during courtship. Given these observations, which of the following is likely an explanation for the female preference for the bright pink woodsprite? Direct benefit Sensory drive Indicator hypothesis All of the above Female balbasaur frogs typically mate multiply during a mating season. Females have multiple pouches for sperm storage and sperm from different males are stored in separate…If an insect that eats plant seeds containing 100 J ofenergy uses 30 J of that energy for respiration andexcretes 50 J in its feces, what is the insect’s net secondary production? What is its production efficiency?