In arthropods, particularly insects, post-embryonic development is influenced by many factors, abiotic, such as temperature and humidity, and biotic factors, such as social environment. In this project we used a social insect, the Madagascar whistling cockroach (Gromphadorhina portentosa) to evaluate the effects of social environment on post-embryonic development, and in particular on size, growth rate, number of molts, and time interval between molts. Eight families of cockroaches were considered, where individuals belonging to the same family were collected at birth and raised in a controlled environment whose only difference consisted of one of the three different conditions of sociality: fully social, semi-social, and isolation. Individuals were followed through all developmental stages until sexual maturation so that development and survival could be monitored in the different treatments.
Negli artropodi, in particolare negli insetti, lo sviluppo post-embrionale è influenzato da molti fattori, abiotici, come per esempio temperatura e umidità, ma anche da fattori biotici, tra cui importante è l’ambiente sociale. In questo progetto abbiamo utilizzato un insetto sociale, la blatta fischiante del Madagascar (Gromphadorhina portentosa) per valutare gli effetti dell’ambiente sociale sullo sviluppo post-embrionale, ed in particolare sulle dimensioni, tasso di accrescimento, numero di mute e intervallo di tempo tra una muta e l’altra. Sono state prese in considerazione otto famiglie, dove individui appartenenti allo stesso nucleo famigliare sono stati prelevati alla nascita e cresciuti in un ambiente controllato la cui l’unica differenza consisteva nelle tre diverse condizioni di socialità: completamente sociale, semi sociale, isolamento. Gli individui sono stati seguiti in tutte le fasi dello sviluppo fino alla maturazione sessuale, così da poter monitorare lo sviluppo e sopravvivenza nei diversi trattamenti.
Studio sullo sviluppo post-embrionale di Gromphadorhina portentosa in diversi contesti di socialità
FAVARO, STEFANO
2022/2023
Abstract
In arthropods, particularly insects, post-embryonic development is influenced by many factors, abiotic, such as temperature and humidity, and biotic factors, such as social environment. In this project we used a social insect, the Madagascar whistling cockroach (Gromphadorhina portentosa) to evaluate the effects of social environment on post-embryonic development, and in particular on size, growth rate, number of molts, and time interval between molts. Eight families of cockroaches were considered, where individuals belonging to the same family were collected at birth and raised in a controlled environment whose only difference consisted of one of the three different conditions of sociality: fully social, semi-social, and isolation. Individuals were followed through all developmental stages until sexual maturation so that development and survival could be monitored in the different treatments.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/58456