What are three basic issues that life histories entail?
a) when reproduction begins, how often the organism breeds, and how many offspring are produced during each reproductive episode
b) whether or not reproduction is a conscious decision, level of parental care, and how many offspring are produced during each reproductive episode
c) when reproduction begins, how often the organism breeds, and how many offspring from each
reproductive episode survive to also reproduce
d) when reproduction begins, level of parental care, and how many offspring are produced during each reproductive episode
e) whether or not reproduction is a conscious decision, how often the organism breeds, and how many offspring are produced during each reproductive episode
x/n=s/N or, solving for population size, N=sn/x
Based on these initial data, the estimated population size of Hector's dolphins
at Banks Peninsula would be 180×447=1,131 individuals. Repeated sampling by Gormley and colleagues suggested a true population size closer to 1,100.
Suppose that none of the 44 dolphins encountered in the second sampling had been photographed before.
Would you be able to solve the equation for N? What might you conclude about population size in this case?
a) The equation cannot be solved, but you would conclude that the population size is very large.
b) The equation can be solved,
and you would conclude that the population size is very small.
c) The equation cannot be solved, so you would not be able to reach any conclusions about population size.
d) The equation can be solved, and you would conclude that the population size is close to 1,100.