Population growth of a species is not related to which of the following parameters ?

Options

A. `N_(t+1)=N_t+[(B+1)-(D+E)]`
B. Out of the four basic processes effecting population growth , three leads to increase in population size
C. For a newly colonised hanitat immigration plays a major role than birth rate
D. Under normal coditions, natality and mortality are the most important factors

Answer

To determine which parameter is not related to the population growth of a species, we need to analyze the four main factors that influence population dynamics: natality, mortality, immigration, and emigration.

### Step-by-Step Solution:

1. **Understanding Natality**:
- Natality refers to the number of births in a population over a specific period. An increase in natality contributes positively to population growth.
- **Hint**: Think about how births affect the size of a population.

2. **Understanding Mortality**:
- Mortality is the number of deaths in a population over a specific period. An increase in mortality leads to a decrease in population size.
- **Hint**: Consider how deaths impact the overall number of individuals in a population.

3. **Understanding Immigration**:
- Immigration refers to the arrival of individuals from other areas into a population. This influx increases the population size.
- **Hint**: Reflect on how new individuals joining a population can lead to growth.

4. **Understanding Emigration**:
- Emigration is the departure of individuals from a population to other areas. This movement decreases the population size.
- **Hint**: Think about how leaving individuals can reduce the total number of organisms in a population.

5. **Analyzing the Options**:
- Now, we need to identify which of these factors does not contribute to population growth.
- Natality and immigration contribute positively to growth, while mortality and emigration reduce population size.

6. **Conclusion**:
- The parameter that does not relate to population growth is **mortality**. While it is a crucial factor in understanding population dynamics, it does not promote growth; rather, it hinders it.

### Final Answer:
Population growth of a species is not related to **mortality**.