Directions: Use the information provided and your knowledge of Life Science to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Life Science to answer the following questions. Show all work where necessary.
Meerkats (
This group behavior significantly increases the survival of individual meerkats. When a sentinel detects a predator, it emits a loud alarm call. In response, the group instantly takes cover in nearby burrows or vegetation. Studies show that meerkat groups with consistent sentinel behavior experience fewer successful predator attacks compared to groups that rely primarily on individual vigilance. The increased detection distance provided by a sentinel gives foraging individuals enough time to react, reducing mortality risk.
Sentinel behavior also influences reproductive success. Meerkats raise pups cooperatively, with several individuals helping to feed, guard, and teach young. When adults spend less time scanning for predators and more time feeding, overall body condition improves, which enhances breeding opportunities. Likewise, pups in groups with more sentinels have higher survival rates because adults can devote more energy to provisioning rather than constantly monitoring for danger.
Mathematically, researchers measure the relationship between sentinel frequency and survival using metrics such as predator attack rates, time spent foraging, distance from cover, and pup survival percentages. Data consistently show a positive correlation between higher sentinel activity and increased individual survival as well as greater reproductive success. When predator density rises, meerkats often increase sentinel rotation frequency, demonstrating adaptive refinement of group behavior.
This example illustrates HS-LS2-8 because it shows how group behavior improves chances of survival and reproduction at both the individual and species level. Without coordinated vigilance, meerkats would have to forage more cautiously, reducing feeding efficiency and pup care. Group behavior creates an evolutionary advantage that enhances overall population stability, making sentinel systems a key social adaptation.
Diagram 1.
Table 1.
Sentinel Events per Hour | Predator Attacks Observed | Successful Attacks |
|---|---|---|
2 | 14 | 6 |
5 | 13 | 3 |
8 | 12 | 1 |
11 | 10 | 0 |
Graph of Information - Figure 1.
Diagram 2.
Table 2.
Group ID | Avg Sentinel Events per Hour | Pup Survival % | Adult Foraging Time % |
|---|---|---|---|
A | 3 | 42 | 58 |
B | 6 | 63 | 71 |
C | 9 | 78 | 76 |
D | 12 | 91 | 82 |
Graph of Information - Figure 2.
According to Table 1, at which sentinel frequency are successful predator attacks the lowest?
Using Table 1 and Figure 1, describe the mathematical relationship between sentinel events per hour and successful predator attacks.
Using Diagram 1 and the reading, explain how group vigilance acts as a limiting factor that increases the carrying capacity of meerkat groups in predator-rich environments.
Based on Table 2, which group shows the highest pup survival percentage?
Using Table 2 and Figure 2, describe how increasing sentinel frequency affects both pup survival and adult foraging time. Include one mathematical comparison.
Evaluate the evidence for the claim that meerkat sentinel behavior, an example of coordinated group vigilance, improves both individual survival and reproductive success.
Write a claim, evidence, and reasoning (CER).