@article {53345, title = {The life cycle of a southern hemisphere cricket Bobilla poene (Orthoptera: Gryllidae) and variation in its size, sex ratio and egg production}, journal = {Austral Entomology}, year = {2018}, month = {Jun-11-2019}, abstract = {

Life cycles of southern hemisphere crickets are poorly studied compared with their northern hemisphere counterparts. The life cycle and associated traits of Bobilla poene Otte \& Alexander (1983) (Nemobiinae) were investigated based on pitfall trap samples collected monthly for 12 months at lowland (320 m) and montane (800 m) locations in Tasmania, the southernmost state of Australia (42\–43\°S). Unlike most other Gryllidae, B. poene has a semivoltine life cycle overwintering as an egg during its first winter followed by nymphs and then adults in subsequent winters. There was some evidence to suggest that a small proportion of the populations completed development from egg to adult within 1 year (i.e. univoltine). The proportion of adult females with eggs present was high (\>70\%) for all months except December when there was a greater proportion of adult females with no eggs present. Mean number of eggs per female was largest from mid-summer to early autumn. Spermatheca diameter increased in size from December to May. Aspects of B. poene life cycle differed between locations. At the lowland location, most crickets (92\%) overwintered as A3 instars and adults, whereas at the montane location, most crickets (87\%) overwintered as A3 and A4 instars. Head width, femur length, body length and spermatheca diameter were larger at the lowland location than at the montane location, but forewing and ovipositor lengths did not differ in size between locations. A small proportion (1.2\%) of montane adult crickets was long winged, and none were recorded at the lowland location. Sex ratios were generally similar at both locations and varied throughout the year. For most of the year, the sex ratios for the A2, A1 and adult stages were female biased. During spring and early summer, sex ratios were male biased or close to parity. This variation in sex ratios is consistent with the concepts of protandry and adaptive growth, with males maturing earlier than females and at a smaller size. The range of climates and altitudes available in Tasmania, where B. poene occurs widely, offers opportunities for further investigation of life cycle variation within this species.

}, keywords = {altitude, protandry, semivoltine, spermatheca, Tasmania}, doi = {10.1111/aen.12377}, url = {http://doi.wiley.com/10.1111/aen.12377}, author = {Driessen, Michael M} } @article {47792, title = {Bioacoustic studies on some cricket species (Insecta:Orthoptera: Gryllidae) from Romania}, journal = {Analele Ştiinţifice ale Universităţii {\quotedblbase}Al. I. Cuza{\textquotedblright} Iaşi, s. Biologie animală}, volume = {LIV}, year = {2008}, pages = {57-64}, chapter = {57}, abstract = {

There are 9 cricket species known from Romania belonging to the family Gryllidae. The ordinary stridulation of 7 species of those has been analyzed in this paper. The species belonging to the subfamily Gryllinae: Gryllus campestris, Acheta domestica, Melanogryllus desertus, Modicogryllus frontalis and Modicogryllus truncatus stridulate especially in the afternoon and in the evening, rarely during daytime, meanwhile the species Pteronemobius heydenii from the subfamily Nemobiinae stridulate only during daytime and especially by sunny weather, while the only species belonging to the subfamily Oecanthinae from our country fauna, Oecanthus pellucens, stridulate at night, very rarely during daytime (mostly in autumn). Details of the stridulatory vein and identification criteria for the studied cricket species are presented in this paper; also we have annalysed the spectrograms and the oscillograms for the ordinary stridulation of the 7 species. The species Modicogryllus truncatus, collected at Mărăşeşti, is a new report for Moldavia.

}, keywords = {bioacoustics, crickets, oscillogram, spectrogram}, author = {Ionut Stefan Iorgu and Gheorghe Mustata} } @article {43232, title = {The Seasonal Succession of Orthopteran Stridulation near Raleigh, North Carolina}, journal = {Journal of the Elisha Mitchell Scientific Society}, volume = {67}, year = {1951}, month = {June 1951}, pages = {87-95}, chapter = {87}, author = {B. B. Fulton} } @article {17168, title = {The song relationships of four species of ground crickets (Othoptera: Gryllidae: Nemobius)}, journal = {The Ohio Journal of Science}, volume = {57}, year = {1957}, pages = {153-163}, chapter = {153}, url = {https://kb.osu.edu/dspace/bitstream/handle/1811/4440/1/V57N03_153.pdf} }