• International Journal of Industrial Entomology and Biomaterials
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• 제15권1호
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• pp.69-73
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• 2007

To establish the indoor-rearing system of the emma field cricket, Teleogryllus emma, the effects of temperature on development and reproduction of the emma cricket have been studied. The influence of temperature on developmental periods of emma field cricket was investigated under the eight temperatures of 15, 18, 21, 25, 27, 29, 31 and $35^{\circ}C$, under $60{\pm}5%$ R.H. and 16L:8D photoperiod. The developmental periods of T. emma nymphs had a range of 124.8 days to 44.4 days at the temperature of $21^{\circ}C$ and $35^{\circ}C$, respectively. At $15^{\circ}C$ and $18^{\circ}C$, however, all tested individuals died before emergence. The highest survival rate was 90% at $25^{\circ}C$, but there were no statistically significant differences among the temperatures. The adult weight increased with increasing temperatures although the weight at $35^{\circ}C$ was decreased. In addition, the influence of temperature on reproduction of emma field cricket was investigated under three temperatures $22^{\circ}C,\;25^{\circ}C\;and\;28^{\circ}C$, under $60{\pm}5%$ R.H. and 16L:8D photoperiod. The longevity of female/male adults were 65.8/79.2 days, 68.5/67.8 days, 46.8/57.4 days at the temperature $22^{\circ}C,\;25^{\circ}C\;and\;28^{\circ}C$, respectively. The preoviposition periods were 32.5 days at $22^{\circ}C,\;22.9^{\circ}C$ days at $25^{\circ}C$ and 22.1 days at $28^{\circ}C$. The highest average fecundity per female was 737.3 at $25^{\circ}C$.

• International Journal of Industrial Entomology and Biomaterials
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• 제23권2호
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• pp.207-213
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• 2011

The diapause of $Telegryllus$ $emma$, the Emma field cricket, was investigated to study the ecological characteristics of the species. Changes in the volume, oxygen consumption, and water content of T. emma eggs were followed from oviposition. An increase in volume, oxygen consumption and water uptake occurred from 7 to 8 days following oviposition. The oxygen consumption of the eggs increased slowly for 7 days following oviposition, but then decreased until 15 days following oviposition. These results showed that a physiological change at diapause initiation affected the volume, water content, and oxygen consumption of the $T.$ $emma$ eggs. An experimental investigation of egg hatching showed that the eggs could be stocked at $10^{\circ}C$ for 40 days with a 14 day pre-period after laying and yield, 62.1% hatchability under these conditions. Maintaining the temperature at approximately $10^{\circ}C$ was favorable for hatching. Another experiment on egg hatching showed that the storage of eggs at $10^{\circ}C$ from 40 to 180 days would ensure satisfactory, hatching capacity.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2007년도 제48회 학술심포지움 및 추계국제학술대회
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• pp.127.1-127.1
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• 2007

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• Journal of Ecology and Environment
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• 제33권4호
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• pp.307-315
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• 2010

Males of the field cricket Teleogryllus emma produce calling songs that are attractive to receptive females. The calling songs of T. emma consist of two components, the long chirp that is composed of up to 12 single pulses, followed by a variable number of short chirps. Based on the analysis of coefficient of variation (CV), temporal characters of the long chirp were less variable than those of the short chirps in male calling songs. To test for phonotactic selectivity of females, we conducted a single-stimulus playback experiment in which five stimuli (standard, long chirp only, long chirp augmented, short chirps only, and short chirps augmented) were used. The standard stimulus included both long and short chirps whose characteristics were derived from the calling songs of field populations. Results of the playback experiment showed that female crickets oriented more frequently toward the stimuli that included the long chirp (standard, long chirp only, and long chirp augmented stimuli) than toward the stimuli lacking the long chirp (short chirps only and short chirps augmented stimuli), indicating that the long chirp in the calling songs was required to elicit positive phonotaxis in the female crickets. The result of CV analysis of the male calling songs and the findings of the female phonotaxis experiment suggested that the long chirp of calling songs may play a role in species recognition in T. emma.

• International Journal of Industrial Entomology and Biomaterials
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• 제15권2호
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• pp.157-160
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• 2007

Nymph of the emma field cricket, Teleogryllus emma, were reared on several types of artificial diets. The development period of nymphs were 55.4 days when only a single food, wheat bran, was provided, and it did not show a significant difference compared to the rearing results of the Danong diet and mixed diet. The supplying period of fish meal as the animal feed, the high emergence rates were obtained at 3rd instar with 90% and 4th instar with 100%. For the added amount test, when more than 40% of the diet was added, it confirmed that the insect weight increased. The characteristics of development according to each added amount of the vegetable food (dry bean-curd residue and corn powder) were investigated to minimize the dangers of the degeneration of diet when rearing with a single feed during the $1st{\sim}3rd$ instar period. First, as the added amount of bean-curd residue increased, nymphal development period became longer and the emergence rate became low. With corn powder as the single diet, all died before becoming adult. However, when corn powder was added up to 30%, no difference existed in the breeding results.

• 한국응용곤충학회지
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• 제44권1호
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• pp.61-65
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• 2005

왕귀뚜라미 대량 사육시 요구되는 실내 채란법 개발을 위하여 인공산란매트 선발과 알 저장조건을 조사하였다. 인공산란매트로서 수분 유지능력이 우수한 원예용 오아시스$^{\circledR}$가 천연의 매트인 흙에 비해 산란선호성이 월등히 우수하였다. 한편 인공산란매트로서 원예용 오아시스$^{\circledR}$는 흙에 비해 총산란수 및 부화율이 다소 저조하였으나 산란이 집중적으로 이루어지는 실용 산란기간(성충화 후 50일이내)의 산란수 및 부화율은 오히려 흙에 비해 우수하였다. 알의 저장조건은 산란 후 14일째, $10^{\circ}C$에 40일간 냉장한 구가 부화율 $62.1\%$로 세대단축 등을 고려할 때 단기저장으로 가장 적합한 것으로 판단되었으며, 산란 후 14일째, $7.5^{\circ}C$에 90일 냉장했을 때 부화율 $65.1\%$로 장기저장법으로 가장 적합한 것으로 나타났다.

• 생태와환경
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• 제46권1호
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• pp.67-74
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• 2013

본 연구는 외래종 쌍별귀뚜라미 (Gryllus bimaculatus, GB)의 도입에 따른 토착종 왕귀뚜라미 (Teleogryllus emma, TE)의 개체군 크기 감소 위협이 예상됨에 따라, 왕귀뚜라미 (TE)와 쌍별귀뚜라미 (GB)의 체장과 개체수 비율에 따른 생존 경쟁을 조사한 실험이다. 실험에 사용된 쌍별귀뚜라미 (GB)와 왕귀뚜라미 (TE) 공시충은 경북대학교 농업생명과학대학 곤충생태학연구실 내의 온실에서 대량 사육한 개체들을 사용하였다. 사육온도는 $28^{\circ}C{\sim}30^{\circ}C$이며, 장일 조건 (16L : 8D), 상대습도는 50%~60%로 유지하였다. 매일 두 종의 개체수를 계측하여 개체수 변화를 조사하였다. 본 실험에서는 더듬이를 제외한 체장 0.5 cm, 1 cm의 왕귀뚜라미 (TE)와 쌍별귀뚜라미 (GB)를 이용하여 왕귀뚜라미 (TE) : 쌍별귀뚜라미 (GB)의 개체수 비율을 1 : 2, 1 : 1, 2 : 1로 나눈 총 3가지의 조건으로 실험하였다. 그 결과, 개체가 작을 때에는 쌍별귀뚜라미 (GB)의 세력이 약하고, 시간이 지날수록 쌍별귀뚜라미(GB)의 세력이 왕귀뚜라미(TE)보다 강해지는 것을 알 수 있었다. 최종 생존종은 대부분 쌍별귀뚜라미 (GB)였으며, 쌍별귀뚜라미 (GB)의 노화가 예상됨에도 불구하고 생존력이 강한 경향을 보였다. 쌍별귀뚜라미 (GB)의 생존율은 큰 차이를 보이지 않았던 반면, 왕귀뚜라미 (TE)의 생존율이 큰 폭으로 감소하는 현상이 나타났다.