Callipogon relictus, a natural monument, is an insect whose life cycle was assumed to take more than 5 years in nature. Winter is a very harsh season, but it is known to be a crucial condition for many insects’ growth. However, no information is known about the overwintering condition and its effects on C. relictus. To understand the overwintering effects on the growth of C. relictus, we investigated the growth patterns of its larvae in indoor conditions after chilling treatment. The larvae were induced to dormancy at low temperature (4°C) for two months, and put them into 10°C for two weeks to break dormancy. After awakening, the temperature was increased 15°C, 20°C to 25°C at a time, and the larvae were kept for two weeks at each temperature. The larvae were divided into 3 groups (3rd to 5th instar, 6th to 8th instar, 9th to last instar). Lastly, head width and weight of the larvae were measured every 30 days under 25°C condition, and mortality and deformity were counted as well. The mortality and deformity rates were the highest in the first group, and the rates decreased toward the last group. On the other hands, growth rate appeared opposite to mortality and deformity rate of each larval group.

Pantala flavescens is a dominant Odonata species in the rice fields in Korea. To determine the effects of different temperatures on its larval growth and emergence, field and laboratory experiments were conducted. Larval growth was also monitored in mono-cropping and double-cropping rice fields. The growth of larvae was monitored every week by measuring the head width. In the field experiment, no difference was found in larval growth and emergence between the control temperature and +1.9°C of the control temperature. The larval growth was greater at 23°C than at 20°C laboratory temperatures, and no emergence was recorded at either temperature after eight weeks of monitoring. There was a quadratic relationship between larval growth and temperature in an incubator at five temperature regimes of 15, 20, 25, 30, and 35°C. Midseason water drainage caused the extinction of the existing individuals and newly hatched larvae dominated after re-watering in the rice fields. Larval size was greater in double-cropping fields than in mono-cropping fields in late July but the tendency was reversed in early August. The results of this study suggest that temperature warming will directly promote the larval growth of P. flavescens and indirectly influence seasonal growth via changes in water management in rice fields.

The Korean rhinoceros beetle, Allomyrina dichotoma (Coleoptera: Scarabaeidae), has been traditionally used for the treatment of liverrelated diseases. Recently A. dichotoma was registered as a food ingredient in Korea. Given the increasing interest in this beetle, studies on the development of safe and nutritious feed sources for its commercial production are needed. In this study, we compared the effects of by-products on the growth of third instar larvae of A. dichotoma. An abundance of food by-products have been found to serve as an alternative energy source in animal feeds with the reduced cost. We fed third instar A. dichotoma larvae feeds consisting of fermented sawdust with nine different combinations of citrus peel, soybean curd cake, soybean oil meal, and brewers’ dried grain, and measured their effects on growth until the larvae pupated. The highest survival rate was in feed supplemented with 10% of brewers’ dried grain (66.7%). Especially, larvae fed on 10% of brewers’ dried grain were 26% heavier than the control (with no supplement). For the group of 10% brewers’ dried grain, the larval period of third instar was shortened by almost 28 days compared to the control group. Of the experimental and control groups, only the group of 10% brewers’ dried grain showed more than 90% of pupation rate. Therefore, brewers’ dried grain may be sufficiently useful as a source of feed for A. dichotoma.

Insects have been proposed as an alternative protein source that may contribute to global demands for food protein. As rising interest in edible insects, it is needed to develop the rearing techniques and nutritious feed sources for mass production. Diet mixing is believed to be advantageous for performance-related factors of edible insects such as survival and growth. In the current study, the effects of diet mixtures with wheat bran, dog feed, and pig feed were investigated on the growth performance of edible chafers, Protaetia brevitarsis and Allomyrina dichotoma. When fermented sawdust with adding 30% wheat bran was fed, larval survival rate and growth rate of both insects were significantly lower than those of the control. Fermented sawdust with high density of wheat bran was inappropriate for these insects. On the other hand, when fed with 2.5% dog feed and 2.5% pig feed, the survival rate and growth rate of the larvae were higher than those of the control. In addition, the larval period of both was shorter than that of the control by 40 days or more. Therefore, it was considered that animal feeds can be used as feed sources for those edible insects.

In general, the larvae of Protaetia brevitarsis is raised on fermented oakwood sawdust. Many attempts have been to changes components sawdust, such as using other tree instead of oakwood or adding another material. Like this some study exists, about 'component' of sawdust, however little is known of relation between larval growth and quality of sawdust. The phenomenon-big particle size sawdust flows up on excrement from the larvae-is occurring in used sawdust for raising the larvae. This study was conducted to observe the larvae and adult of Protaetia brevitarsis act according to each sawdust particle size. We conducted choice experiments with Protaetia brevitarsis, which were offered sawdust differing in particle size. Females preferred to lay their eggs on the fine particle sawdust. Also in the case of larvae, the more fine sawdust particle has the more high level of preference, and so is hatchability. Especially larvae tend to be slanted toward finer sawdust. Growth rate of the larvae was shown the highest level in the finest sawdust just as others do. These results show that fine sawdust particle size is advantage for larval development and oviposition.

본 연구는 포식압에 따라 서로 다르게 나타나는 성장률에 대하여 한국산 도롱뇽 유생을 대상으로 이루어졌다. 인왕산에서 채집해온 도롱뇽의 알(난괴)을 포식압 유, 무에 따라 두 그룹으로 나누었다. 포식자 cue로는 버들치의 체취를 이용하였고, 포식압이 존재하는 그룹은 하루 세 번 포식자의 cue에 노출되도록 하였다. 포식자 cue 처리는 알 채집일 다음 날부터 부화 후 1주일까지 하였고, 이후 각 유생의 snout-vent length를 버니어 캘리퍼를 이용하여 측정하였다. 부화 후 1주일부터 2주일 사이의 기간 동안 각 그룹의 유생에게 충분한 양의 실지렁이를 먹이로 제공하였고, 남은 먹이는 제거하였다. 부화 후 2주일이 되는 날 각 유생의 snout-vent length를 다시 한 번 측정 한 후, 각 개체의 성장률을 계산하여 데이터 분석을 하였다. 그 결과 포식자 cue처리를 한 그룹은 그렇지 않은 그룹보다 낮은 성장률을 보였으며, 사망률 또한 높은 것으로 나타났다.

실험실 내의 4개의 항온조건(10℃, 15℃, 20℃, and 25℃)에서 연못하루살이 (Cloeon dipterum)유충의 생존율, 생장률, 발달률, 성충 우화율을 연구하였다. 사육 시작 1주 동안 유충의 사망률이 상대적으로 높았으나, 그 이후 안정되는 경향을 보였다. 온도에 따른 생장률 및 발달률로부터 판단하여 볼 때, 유충 생장과 발달의 적정온도는 20℃와 25

대하(Fenneropenaeus chinensis) 종묘생산에 관한 초기성장의 자료를 얻기 위하여, 충청남도 태안군 안면읍 창기리 앞바다에서 1993년 5월에 자망으로 모하를 채집하여 실험에 사용하였다. 모하의 평균 전장은 23.6±0.71cm, 평균 두흉갑장은 5.1±0.63cm, 평균 체중은 61.3±5.12 g이었다. 자연수온보다 4℃ 높은 22℃, 염분은 33‰ 조건에서 산란유발을 실시하였으며, 산란 후 FRP 1톤 용량의 원형수조에서 수온 24

1963년부터 1966년 사이에 과원에서 채집된 갓노랑비단벌레 유충과 실내에서 사육한 일부 유충을 가지고 두건을 측정하며 영기를 판정함과 동시에 성장하는 비와 변이를 고찰하였다. (1) 유충의 두건의 변리곡선은 완전히 7개의 계곡으로 나타나는데, 이것은 6회의 탈피를 하여 7영을 지내는 것 같다. (2) 대체로 유충은 6-7영을 경과하는데, 6영으로 용화가 되는 것은 11월부터 목질부 내에 들어가 용화직전으로 월동하며, 형성층 부위에서 월동하였다가 만춘이나 초하에 용화가 되는 것은 7영으로 경과한 것 같다. (3) 두건의 표준편차는 1영과 6영 이외에는 영이 커짐에 따라 커졌으며, 변이계수는 영이 커짐에 따라 줄어지는 경향이었다. 그리고 성장비는 1-2영시는 크고 영이 높아짐에 따라 적어졌다. (4) 곤충의 유충의 두건 성장에 관해서 Dyar식보다 Games and Campbell식이 더욱 적합하였다. (5) 유충 영기의 활동상황으로 보아서 다음과 같이 추정된다. 당년에 부화된 유충은 2-3영으로 월동한 것 같고 이전의 것은 5-6영으로 월동 익년에 우화한 것 같다.

Much research on Black Soldier Fly (Hermetia illucens) is underway in the disposal of food waste. In addition to food waste treatment, it has received much attention in the industrial using of by-products such as feed, compost, and antibiotics. In this study, the treatment efficiency of organic wastes and larval growth were investigated according to the amount of input. The organic wastes used in this study were chicken carcasses and food waste. In case of carcass treatment, to the exclusion of bones and feathers, it was treated about 83 percent. Food waste was completely treated in 48 hours when 50 percent of the weight of the food was put into the larvae. The maximum larval growth was observed with 10 percent injected, from 0.076 g to 0.254 g. However, there was no difference in the growth of larvae when 30 percent or more was added.

Early growth, the rate of yolk sac absorption, and nucleus size in liver parenchymal cells were correlated with the nutritional status of first feeding larval haddock, Melanogrammus aeglefinus. Larvae that successfully began exogenous feeding maintained high growth rates, delayed yolk sac resorption, and had larger hepatocyte nuclear sizes than starved larvae. At 10 days post hatch (DPH) the cumulative mortality in the starved larval haddock group was 100%. The area of the hepatocyte nuclei in starved larvae gradually decreased, reaching its lowest value by 9 DPH. Our results support the current practice of providing the first food supply at 3 DPH. Hepatocyte nuclear size can be used to assess larval haddock nutrition status, and may be a good criterion for assessing the success of transition from endogenous to exogenous feeding.

본 연구의 목적은 부화 후 67일 동안 대서양산 Haddock, Melanogrammus aeglefinus 치어의 초기성장을 조사하여, 본 종의 발생생물학과 양식 측면에서의 정보 제공하고자 한다. 전장성장은 , TL은 전장이며, X는 부화 후 표본시일), 체중성장은 , BW는 체중이며, X는 부화 후 표본시일)로 각 성장들은 지속적인 성장을 보였다. 체고와 가슴지느러미 길이는 연속적인 성장을 보여 체고성장은 , BD는 체고이며, X는 부화 후 표본시일