Environmental stress and fluctuating asymmetry in the grasshopper Chorthippus parallelus (Acrididae: Gomphocerinae) |
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Authors: | Jentzsch Anja Köhler Günther Schumacher Jens |
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Institution: | 2. Department Plant Biotechnology, School of Biotechnology, Madurai Kamaraj University, Madurai, India;1. Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50424, Republic of Korea;2. Entomology Division, Nepal Agricultural Research Council (NARC), Kathmandu, Post Box no. 976, Kathmandu, Nepal |
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Abstract: | We examined the effect of agrochemical pollution/fertilisation of the soil and climatic conditions at high altitudes on fluctuating asymmetry (FA) level in hindfemur and forewing lengths of the grasshopper Chorthippus parallelus (Zetterstedt). All traits and samples exhibited ideal FA. Forewings, which are less functionally significant in this species, generally exhibited greater FA than the more functionally significant femora. Forewing FA was also more affected by stress induced by climatic conditions at high altitudes than femur FA. The high altitude sample was the most asymmetric sample for both traits, followed by the two control samples. The two samples from agrochemically contaminated habitats showed the lowest asymmetry in femora and forewings of C. parallelus. These results suggest that high altitude imposes more stress on this grasshopper species than does agrochemical contamination although the stress response was more dramatic in the less functional trait. |
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Keywords: | agrochemical pollution fertilisation extreme climatic conditions marginal population trait functionality and FA |
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