7.1 Adaptations, interdependence and competition

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Question 14
Medium

A group of marine biology students investigated the population size of glass shrimp (Palaemonetes pugio) in a salt marsh drainage channel community.

They used the following sampling method:

  1. Collect 1 dm3 of water from the drainage channel using a specialized sampler.
  2. Filter the water sample through a fine mesh and count the number of glass shrimp collected.
  3. Repeat the process to obtain five samples in total.

Table of Results

Sample numberNumber of glass shrimp in 1 dm3 of water
113
237
30
422
528
a.

Calculate the mean number of glass shrimp in 1 m3 of channel water. (Note: 1 m3=1000 dm31\text{ m}^3 = 1000\text{ dm}^31 m3=1000 dm3)

[2]
b.

The drainage channel is rectangular with the following measurements:

  • length=5.5 m\text{length} = 5.5\text{ m}length=5.5 m
  • width=2.0 m\text{width} = 2.0\text{ m}width=2.0 m
  • depth=0.6 m\text{depth} = 0.6\text{ m}depth=0.6 m

Calculate the estimated total number of glass shrimp in the drainage channel. Give your answer in standard form.

[3]

7.1 Adaptations, interdependence and competition Questions

  1. GCSE
  2. /Biology
  3. /7.1 Adaptations, interdependence and competition