Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 56.2, Problem 1CC
Figure 56.6 Idealized survivorship curves.
Which type of survivorship curve would you expect for (a) mussels and (b) turtles?
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1)The video discusses some of the factors that allowed lionfish to expand throughout the Atlantic region. Which of the following reasons were given for why the lionfish population has been able to expand so rapidly?
choose all that apply
a)Lionfish out-compete native fish for food
b)Atlantic predatory fish don't eat lionfish
c)Lionfish are able to breed more frequently than native fish
d)The Atlantic region has fewer parasites that attack lionfish
e)None of these
Number of survivors (log scale)
1,000
100
D) D
E) E
10
Figure 40.3
50) In Figure 40.3, which curve best describes survivorship in marine molluscs?
A) A
B) B
C) C
A
E
D) D
E) E
Relative age
51) Which curve best describes survivorship in elephants?
A)
B) B
C) C
Very few species on Earth are completely r-selected or K-selected. Many species in their natural habitats demonstrate a life strategy that ranges along a continuum between r- and K-selected strategies. Use this information to answer the 3 sub-parts.
a) Sea otters are marine mammals that live in northern Pacific coasts. Typical female sea otters reach sexual maturity around 3 or 4 years of age, and they reproduce once a year, producing a single pup.Only female sea otters are tasked with raising the offspring. Mothers constantly take care of their pups until they are 8 months old, but only 25% of the pups survive past the first year. Sea otter fur was highly sought after between the 18th century and the early 20th century. Through conservation efforts, the number of sea otters increased. The current world population is estimated to be between 1 000 and 2 000 individuals, and they are considered to be endangered. Their main food source is sea urchins, molluscs, and crustaceans. Sea…
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- As a hypothetical example, imagine that you were studying a population of Eastern Collared-Lizards (Crotaphytus collaris). The lizards laid 2000 eggs, of which 1000 were eaten by raccoons and skunks. Eight hundred of the surviving juveniles were eaten by foxes and cats. One hundred and eighty of the young adults died during their first hibernation period. What is the indispensable mortality for each stage? If you want to increase the numbers of reproducing adults, which stage should you focus on?arrow_forwardRed-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) neutralarrow_forwardYou are observing two different species of caterpillars feeding on green shrubs in the Sacramento Mountains. One has bright red and yellow stripes, the other is a nondescript greenish color. You hypothesize that the two species have adopted different antipredation strategies. 1) What would these two strategies be called? 2) Which species would you predict is noxious to potential predators and which species is palatable? 3) Which species would you predict would alter its behavior more in the presence of predators? Why?arrow_forward
- Which of the following charts correctly plots the survivorship curve of the Song Thrush? Survivorship 0.1 A) 0.01 0.001 2 4 8 10 12 14 Age (years) Survivorship 1,000 900 800 700 E 600 B) E 500 400 300 200 100 -1 1 5 Age (years) Survivorship 1,000 100 C) 10 -1 1 7 Age (years) Survivorship 1,000,000 100,000 10,000 1,000 D) 100 10 -1 3 9 Age (years) 1.00000 0.80000 0.60000 E) 50.40000 0.20000 0.00000 10 15 20 25 30 35 40 Age (years) Number of Survivors Survivorship Number of Survivorsarrow_forwardhttps://media.hhmi.org/biointeractive/click/lionfish-invasion/introduction.html Now you'll tie together what you've learned. Read over the information on what's happening with the study of lionfish (you can ignore the questions on this page). Answer the question here on Canvas. 18)Based on what you've learned about the invasive lionfish population in the Atlantic, and the various types of factors that may limit population growth, which ONE factor (intraspecific competition, interspecific predation, disease & parasites, social behavior) do you think would be the MOST limiting? Why?arrow_forwardif kelp population continues to decrease then how will sea otters, sea urchins, killer whales be affected ?arrow_forward
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