ABSTRACT
Ignoring immigration and emigration, stock production is a mixture of recruitment of new animals to the population and the growth of the individuals already in the population. This is one reason there is a huge literature on the growth of individuals in žsheries ecology. In addition, many aspects of a species’ life history characteristics tend to be re¥ected in how it grows. Thus, long-lived species tend to be relatively slow growing, while short-lived species tend to grow more quickly (though exceptions exist; Ziegler et al., 2007). In this chapter, we will ignore the biology of growth and focus instead on the mathematical description of growth.
