Based on the data in the graph, which of the following best identifies the reproductive strategy of harbor seals?
A) K-selected
B) R-selected
C)Type 2 Survivorship
D) Type 3 Survivorship
The Correct Answer and Explanation is:
To determine the reproductive strategy of harbor seals, we need to analyze the graph’s data in the context of the four provided answer choices: K-selected, R-selected, Type 2 Survivorship, and Type 3 Survivorship. Since I can’t see the specific graph, I will give you a general analysis based on typical harbor seal reproductive behavior, and how it relates to these categories.
Answer: A) K-selected
Explanation:
K-selected species, such as harbor seals, tend to produce fewer offspring but invest heavily in their care and survival. These species are more likely to thrive in stable environments where resources are limited and competition is high. Harbor seals fit this description because they typically give birth to one pup at a time, which is cared for extensively until it can survive independently. They exhibit high parental investment, which is characteristic of K-selection.
R-selected species, on the other hand, reproduce in large numbers with minimal parental care. This strategy is typical of organisms that face unpredictable environments with high mortality rates, where it is advantageous to produce many offspring to increase the likelihood that some will survive. Harbor seals do not fit this description, as they have a relatively low reproductive output compared to R-selected species, such as insects or fish, which produce many offspring at once with little to no parental care.
In terms of survivorship curves, Type 2 Survivorship refers to species where the mortality rate is constant across all age groups, and Type 3 Survivorship indicates species with high juvenile mortality but high survival rates for the few who make it past the early stages. Harbor seals do not fit these curves precisely either. Harbor seals show characteristics more akin to Type 1 Survivorship, where the majority of individuals survive to adulthood, and mortality rates increase with age.
Thus, based on their reproductive strategy, harbor seals are best identified as K-selected species due to their low reproductive rate, high parental investment, and adaptation to stable environments.