A Comparative Study on Effects of Normal Versus Elevated Temperatures During Preimaginal and Young Adult Period on Body Weight and Fat Body Content of MatureCoccinella septempunctataandHarmonia axyridis(Coleoptera: Coccinellidae)

The effect of elevated temperatures on food conversion efficiencies of Coccinella septempunctata and Harmonia axyridis young adults feeding on Sitobion avenae

“…A reason for these deviating results could be that the aphid species are unequally suited as prey for the two coccinellid species investigated. However, our experiments since 2006 have consistently shown higher feeding rates for C. septempunctata than for H. axyridis when feeding on S. avenae (Krengel et al 2012). Regarding the effect of elevated temperatures, other authors including Freier & Triltsch (1996), Hodek & Honek (1996) and Katsarou et al (2005) have also observed higher consumption rates of C. septempunctata at elevated temperatures.…”

“…Xue et al (2009) measured higher voracity in H. axyridis than in C. septempunctata feeding on A. glycinis (Homoptera: Aphididae) at a constant 26°C. Previous studies of native C. septempunctata and invasive H. axyridis feeding ad libitum on S. avenae indicated that aphid consumption by both species increases with elevated temperature (Krengel et al 2012), whereby we observed higher consumption rates of C. septempunctata than of H. axyridis. Shannag & Obeidat (2006) found a correlation between weight gain and consumed aphid biomass during larval development of C. septempunctata.…”

Insects as Food for Insectivores

“…cold-blooded); their body temperature depends to a large degree on the environmental temperature. Therefore, within a range of temperatures suitable for the specific species, their metabolic rate and growth rate should increase with higher temperatures (Akman Gündüz and Gülel, 2002;Ali and Ewiess, 1977;Ali et al, 2011;Angilletta et al, 2004;Krengel et al, 2012). A standard way of quantifying this is the relative difference when the temperature is increased by 10 °C (Q10).…”

“…For instance, in house crickets, the development time is halved with a 10 °C increase in temperature (Roe et al, 1980). Although growth rates are increased by higher temperatures, adult size generally seems to decrease; a colder environment results in larger animals (Akman Gündüz and Gülel, 2002;Angilletta et al, 2004;Krengel et al, 2012). Exceptions include both desert locusts (Schistocerca gregaria Forsskål) and migratory locusts, for which adult body weights are higher when reared at 30 °C and 31 °C respectively, than at 25 °C (Akman Gündüz and Gülel, 2002;.…”

Comparative Biology of Three Coccinellid Predators on Cowpea Aphid Aphis Craccivora

“…It was also observed that C. septempunctata laid more eggs; and more eggs were viable in the cooler months; eggs of C. septempunctata were more viable as compared to C. transveralis and C. sexmaculata Wang et al (2013). observed that egg hatchability and fecundity of C. sexmaculata are more at 30 o C in China Krengel et al (2012). on C. septempunctata feeding on the grain aphid Sitobion avenae found that compared Predaceous coccinellids observed in Bhubaneswar(September 2014-March 2015…”