You are studying how energy flows in a food web. The data in Table 1 shows the d

Question

You are studying how energy flows in a food web. The data in Table 1 shows the dietary composition of species in your study area (for species A–H). To read the data table, start at a species in column 1, read to the right across that row to find the number of individuals consumed, then read straight up to determine the species that it consumed. For example, species C consumed 15 individuals of species A. Use the data in the table to answer the following questions.

4. What is unusual about the dietary composition of species E? Give two possible reasons for this pattern.

Table 1 Species consumed Total individuals A B C D E F G H consumed 0 A 0 0 0 0 0 0 0 0 B 0 0 0 0 0 0 0 C 15 20 0 0 0 5 0 0 40 D 2 16 0 0 0 8 0 0 26 E 0 0 10 1 0 0 F 0 0 0 0 0 0 0 0 H 0 0 0 0 0

Explanation / Answer

The diertary composition of species E includes species E itself i.e. species E feeding on species E itself. This can be possible due to
1: Filial cannibalism: It is intraspecific interaction in which adults feed on their progenies. It is done so as to reduce the intraspecific competition for the offspring
2: Infanticide : The act of feeding on young animal by adult animals of same species.

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