• 한국수산과학회지
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• 제33권6호
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• pp.554-558
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• 2000

참서대 암컷의 생식소중량지수는 6월에 가장 높았다. 난모세포의 발달양식은 난군동시발달형이며, 초기 성장기 난모세포에서 난병과 난황핵이 관찰되었다. 생식주기는 성장기 (2${\~}$5월), 성숙기 (5${\~}$6월), 완숙 및 산란기 ($6{\~}8$월) 그리고 회복 및 휴지기 ($8{\~}2$월)로 구분된다 전장 $TL 28.1{\~}30.8 cm$의 개체당 절대포란수는 2,197 개였으며, 체중 g당 상대포란수는 10.0개였다.

• 한국수산과학회지
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• 제37권3호
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• pp.226-231
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• 2004

Maturation and spawning of Acentrogobius pflaumi were studied using samples collected from the Gwangyang Bay, Korea, from January to December, 1999. The gonadosomatic index (GSI) of the female was the highest in May. The spawning season lasted from May to June. There was a significant difference in the 1 : 0.59 sex ratio between males and females (p<0.01). The percentage of sexually mature females was over $50\%$ for the size group between 4.5 cm and 4.9 cm, and $100\%$ for the size group over 5.5 cm in body length. The size of eggs spawned was between 0.4 to 0.6 mm, and the spawning occured once a year. Fecundity varied between 3,600 and 9,700 eggs. The relationship between the fecundity and body length of the fish was expressed in the fecundity equation as; $F=0.294{\times}10^3\;BL^{1.899}.$ The first spawning length was 4 cm BL.

• Ocean and Polar Research
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• 제40권1호
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• pp.15-22
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• 2018

In the present study, we investigated temporal variation in the reproductive effort and biochemical contents in adult Manila clam Ruditapes philippinarum at Shi-Heung-Ri beach on the east coast of Jeju Island. Gonad-somatic index (GSI), a ratio of the egg mass to the total biomass determined using ELISA increased dramatically from late May to June (7.1% to 19.5%). In mid-July, GSI dropped to 15.1%, indicating spawning on a small scale during this period. GSI also declined dramatically from late August (15.5%) to September (4.3%), suggesting that massive spawning occurred during this period. A positive correlation was observed between clam size and potential fecundity, while potential fecundity ranged between 1.19-8.40 million eggs/clam. Total proteins and lipids in the tissue increased from late spring to mid-summer, coinciding with an increase in GSI. Protein, lipid and carbohydrate contents in the tissue were lowest in January, indicating that clams were suffering from poor nutritional circumstances, which may be associated with poor food supply from the environment. Monthly increase and/or decrease in the body weight were closely related to gonad maturation and subsequent spawning, which was also linked to temporal changes in the contents of protein, lipid and carbohydrates in the tissue.

• 생물환경조절학회지
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• 제13권1호
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• pp.56-60
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• 2004

진딧물 포식성 무당벌레의 성충을 대상으로 저온처리에 의한 생식적 휴면을 유도하였다. 성충의 인위적인 생식적 휴면의 유지는 $4^{\circ}C$에서 5개월 정도까지 가능하며 먹이의 공급이 필요하지 않아 경제적인 무당벌레의 저장법이라 할 수 있다. 하절기를 포함한 계절에 구분 없이 무당벌레의 성충의 저온저장이 가능하여 필요시 어느 때라도 진딧물 발생지에 무당벌레를 공급할 수 있게 되었다. 휴면 후 $25^{\circ}C$에서 수명과 산란력이 우수하며 생식호르몬인 juvenile hormone(JH)의 합성 유사체인 methoprene은 암컷의 초반기 생식력을 증진시키는 효과를 나타낸다.

• 한국동물학회지
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• 제30권2호
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• pp.99-106
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• 1987

It is the purpose to investigate the physiological toxity and mutagenicity by heavy metal compounds such as potasium dichromate, sodium arsenite and selenium dioxide on the development of Drosophila melanogaster. These chemical compounds were highly toxic at every developmental stage of Drosophila. The relative values of fecundity, viability and developmental time obtained on food media containing 5 different levels of potasium dichromate (500, 600, 700, 800, and 900 ppm), also 5 different levels of sodium arsenite and selenium dioxide (10, 15, 20, 25 and 30 ppm). Resulting in the relative values of fecundity and viability generally decreased, on the contrary developmental time generally reduced as the concentration of chemicals in the food increased. A significant reduction in the fecundity was observed between 800 and 900 ppm (p<0. 01) on the potasium dichromate media, between 15 and 20 ppm (p<0. 05) on the sodium arsenite media, between 20 and 25 ppm (p<0. 02) on the selenium dioxide media. A significant reduction in the viability was observed between 700 and 800 ppm (p<0. 01) on the potasium dioxide media, between 25 and 30 ppm (p<0. 01) on the sodium arsenite media, between 20 and 25 ppm (p<0. 01) on the selenium dioxide media. The developmental time was significantly reduced between 800 and 900 ppm (p<0. 001) on the potasium dioxide media, between 15 and 20 ppm (p<0. 001) on the sodium arsenite media, and between 25 and 30 ppm (p<0. 01) on the selenium dioxide media.

• 한국동물학회지
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• 제30권2호
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• pp.107-116
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• 1987

It is the purpose to investigate the physiological toxity and mutagenicity by heavy metal compounds such as potasium dichromate, sodium arsenite and selenium dioxide on the development of Drosophila melanogaster. These chemical compounds were highly toxic at every developmental stage of Drosophila. The relative values of fecundity, viability and developmental time obtained on food media containing 5 different levels of potasium dichromate (500, 600, 700, 800, and 900 ppm), also 5 different levels of sodium arsenite and selenium dioxide (10, 15, 20, 25 and 30 ppm). Resulting in the relative values of fecundity and viability generally decreased, on the contrary developmental time generally reduced as the concentration of chemicals in the food increased. A significant reduction in the fecundity was observed between 800 and 900 ppm (p<0. 01) on the potasium dichromate media, between 15 and 20 ppm (p<0. 05) on the sodium arsenite media, between 20 and 25 ppm (p<0. 02) on the selenium dioxide media. A significant reduction in the viability was observed between 700 and 800 ppm (p<0. 01) on the potasium dioxide media, between 25 and 30 ppm (p<0. 01) on the sodium arsenite media, between 20 and 25 ppm (p<0. 01) on the selenium dioxide media. The developmental time was significantly reduced between 800 and 900 ppm (p<0. 001) on the potasium dioxide media, between 15 and 20 ppm (p<0. 001) on the sodium arsenite media, and between 25 and 30 ppm (p<0. 01) on the selenium dioxide media.

• 한국수산과학회지
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• 제54권1호
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• pp.46-52
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• 2021

The maturation and spawning of Pacific cod Gadus macrocephalus were inversigated using 2,415 samples collected monthly from January 2017 to December 2019, in the Yellow Sea of Korea. We analyzed monthly changes in gonadosomatic index (GSI), maturity stage, egg diameter (mm), the relations fecundity and total length (cm). The spawning period was February to March. Fecundity varied between 334,836 and 2,099,600 eggs. The relationship between the fecundity and TL of fish was expressed in F=186.86TL2.0954 (R2=0.7359). The percentage of sexually mature females estimated from a logistic function was over 50%, 75% and 97.5% for the size (TL) 39.3, 44.8 and 57.7 cm.

• 한국응용곤충학회지
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• 제47권4호
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• pp.365-368
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• 2008

싸리수염진딧물(Aulacorthum solani Kaltenbach)의 성충 수명과 산자수를 $12.5{\sim}25^{\circ}C$, 상대습도 $60{\sim}70%$, 광주기 16L:8D 조건에서 조사하여 생명표를 작성하였다. 싸리수염진딧물 성충은 $12.5{\sim}25^{\circ}C$에서의 수명이 $34.3{\sim}10.5$일로 온도의 상승에 따라 성충기간이 짧아졌다. 산자수는 $15^{\circ}C$에서 74.1마리로 최고치를 보였으며, $15{\sim}25^{\circ}C$에서는 온도가 상승함에 따라 산자수가 감소하였으나, $12.5^{\circ}C$에서는 47.0마리로 온도가 낮아짐에 따라 산자수가 적어지는 경향을 보였다. 또한 싸리수염진딧물 성충의 일일 산자수는 $20^{\circ}C$에서 2.9마리였고, $12.5^{\circ}C$에서 1.4마리와 $30^{\circ}C$에서 1.3마리로 온도가 높거나 낮아지면 일일산자수가 적어졌다. 싸리수염진딧물 약충 발육시 사망률과 성충 수명, 산자수를 이용하여 생명표를 작성하였는데 싸리수염진딧물은 순증가율(Ro)이 $15^{\circ}C$에서 58.7, 내적자연증가율($r_m$)은 $20^{\circ}C$에서 0.27, 기간증가율(${\lambda}$)은 $20^{\circ}C$에서 1.32이었으며, 배수기간(Dt)은 $20^{\circ}C$에서 2.52, 세대기간(T)은 $22.5^{\circ}C$에서 10.99로 가장 짧았다.

• 한국응용곤충학회지
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• 제48권3호
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• pp.361-368
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• 2009

미끌애꽃노린재와 칠레이리응애를 온도 6, 8, 10, $12{\pm}1^{\circ}C$, 습도 $70{\pm}10%$, 광주기 24시간 암조건에 저장하여 생존을, 산란수 등을 조사하였다. 미끌애꽃노린재 성충의 70% 생존율이 가장 높은 온도는 줄알락명나방 알을 제공한 $10^{\circ}C$로 저장기간은 36일이었다. 피장기간별 산란수는 $10^{\circ}C$에 $10{\sim}50$일까지 저장한 결과, $37.1{\sim}120.5$개로 무저장 산란수 224.5개 대비 산란율은 $16.5{\sim}53.7%$로 감소하였다. 칠레이리응애 성충의 생존율이 가장 높은 온도는 $8^{\circ}C$이다. 저장기간별 산란수는 $8^{\circ}C$에 점박이응애 알을 먹이로 제공하여 $7{\sim}42$일 저장한 결과, 산란수는 $11.9{\sim}18.9$개로 무저장 산란수 26.4개 대비 산란율은 $45.1{\sim}71.6%$로 감소하였다.

• 대한수의학회지
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• 제31권1호
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• pp.11-18
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• 1991

The purpose of this study was designed to investigate the methods for the functional elevations of sperm-host (utero-vaginal, U-V) glands in domestic hens. The laying hens were assigned to five groups of low-, medium-, high- fecundity, gonadotrophin-, and caffeinetreated hen groups, these group hens were sacrified at interval after last artificial inseminations (AI). Number of U-V gland observed in tissue preparation of each hen U-V region were investigated, and also the appearance rates of spermatozoa-contained U-V glands were calculated. 1. In low-fecundity hen groups, the appearance rates of spermatozoa-contained U-V glands were found to be 13.5, 15.6, 11.8, 13.6, 2.3, 0, and 0% respectively at the hens of 1, 3, 7, 10, 13, 16, and 19 days after AI. 2. In medium-fecunditiy hen groups, the appearance rates of spermatozoa-contained U-V glands were found to be 21.7, 22.7, 13.4, 10.4, 10.0, 7.7 and 0% respectively at the hens of 1, 3, 7, 10, 13, 16, and 19 days after AI. 3. In high-fecundity hen groups, the appearance rates of spermatozoa-contained U-V glands were found to be 30.8, 31.8, 28.9, 13.0, 10.3, 10.8, and 0.9 respectively at the hen of 1, 3, 7, 10, 13, 16, and 19 days after AI. 4. In gonadotrophin-treated hen groups, the appearance rates of spermatozoa-contained U-V glands were found to be 31.8, 33.7, 32.3, 17.3, 12.0, 5.0, and 1.0% respectively at hens of 1, 3, 7, 10, 13, 16, and 19 days after AI. 5. In caffeine-treated hen groups, the appearance rates of spermatozoa-contained U-V glands were found to be 33.2, 29.2, 22.4, 17.8, 12.7, 0, and 1.1% respectively at hens of 1, 3, 7, 10, 13, 16, and 19 days after AI. 6. The appearance rates of completely filled U-V glands and partially filled U-V glands of spermatozoa-contained U-V glands were found to be 3.8:1. So we suggested as follows: The appearance rates of spermatozoa-contained glands tend to be high from 1 day after AI to 7 days and tend to declined rapidly from 10 days. Also higher fecundity hen groups tend to be higher in the appearance rates and longer in spermatozoa-contained duration in U-V glands than in lower fecundity hen groups. Gonadotrophin hormone tend to increase the appearance rates of spermatozoa-contained U-V glands than those in control group, whereas caffeine tend to increase those rates at 1 day and to declined more rapidly from 3 day than in control group.