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Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects

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Published on: April 21, 2018

Energy extraction efficiency in some chosen insects.

T J Pandian¹, M R Delvi¹

¹Department of Zoology, Madurai University, P.G. Centre, Sri Palaniandavar Arts College, Palni, Tamilnadu.

|March 18, 2017

Summary

The grasshopper Poecilocerus pictus extracts 15-27% of energy from its food plant. This energy extraction efficiency varies with temperature, unlike assimilation efficiency in other insects.

Area of Science:

Zoology
Ecology
Insect Physiology

Background:

Energy extraction efficiency and assimilation efficiency are key ecological concepts.
Insect feeding strategies and energy budgets are crucial for understanding ecosystem dynamics.
Variations in temperature and food composition can significantly impact insect metabolism and energy utilization.

Purpose of the Study:

To define and compare energy extraction efficiency and assimilation efficiency in insects.
To quantify the energy extraction efficiency of Poecilocerus pictus fed on Calotropis gigantea at different temperatures.
To investigate factors influencing energy extraction efficiency, such as temperature and food ash content.

Main Methods:

Defining energy extraction efficiency and assimilation efficiency.

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Feeding experiments with Poecilocerus pictus from hatching to death at controlled temperatures (26°C and 36°C).

Comparative analysis of energy extraction efficiency in Poecilocerus pictus with data from other insect species (Bombyx, Hyalophora, Pyrrhosoma, Hedriodiscus).

Main Results:

Poecilocerus pictus exhibited energy extraction efficiencies of 15% and 27% at 26°C and 36°C, respectively.
Other insect species showed lower energy extraction efficiencies (around 7%) but higher assimilation efficiencies (42-97%).
High ash content in food sources was identified as a factor affecting energy extraction efficiency in certain aquatic insects.

Conclusions:

Temperature significantly influences the energy extraction efficiency of Poecilocerus pictus.
Energy extraction efficiency can be distinct from assimilation efficiency, with variations observed across different insect groups and feeding strategies.
Food composition, particularly ash content, plays a role in the energy extraction efficiency of some insect herbivores and carnivores.