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Effect of Recombinant Bovine Somatotropin on Growth of Olive Flounder, Paralichthys of olivaceus
Rho, Sum-Rho,Kim, Pil-Youn,Lee, Young-Don,Choi, Kwang-Sik,Song, Choon-Bok The Korean Society of Fisheries and Aquatic Scienc 1999 韓國養殖學會誌 Vol.12 No.2
The recombinant bovine somatotropin (rBST) was administered to the oliver flounder, Paralichthys olivaceus, to know the effects and optimal administration frequency and dosage of the hormone. The experiment was conducted with three different treatment groups (A, B and C) designated based on the duration and administration frequency of rBST and one control (D) from April 14, 1996 to March 16, 1997. The fish of hormone treated groups grew 7.86 to 10.07% (47.45 to 60.75 g in weight) better than the control at the end of the experiment (P<0.05). No significant differences in their growth were detected among treatment groups. The distinct growth improvement was recognized four weeks after completion of the first four hormone administration. When considering water temperatures measured from the experimental tanks, the effect of rBST on the flounder was greater during the period showing relatively lower temperature. The survival rates were higher in treatment groups than in the control, revealing 98.3% (A), 98.4% (B), 97.7% (C) and 93.1% (D) during the first stage of culture; 92.7% (A), 91.3% (B), 86.7% (C) and 80.0% (D) during the second stage of culture.
盧暹 濟州大學校海洋硏究所 1991 해양과환경연구소 연구논문집 Vol.15 No.-
참전복, Haloitis discus hannai Ino, 浮游幻生의 빛에 대한 반응과 상층에 低鹽分濃度의 成層이 있을때 유생의 浮上에 미치는 영향을 밝히기위한 기초적인 시험을 해면과 실험실에서 실시한 결과는 다음과 같다. 참전복 trochophore 幻生과 孵化後 72시간내의 veliger 유생의 유리실험관속에서의 垂直分布는 빛의 조건과 關係없이 80-90%의 유생의 표층에 群集하였다. 참전복의 부유유생기의 負의 走地性은 유리관 내에서는 底양基로 移行하는 孵化後 72∼90시간부터 소실되기 시작하였다. 浮游幻生의 表層에 群集하려는 負의 走地性에 影響을 주는 上層部의 底 分海水濃度는 유생의 發生段階에 따라 차이가 나타났다. trochophore유생에서는 24.5‰, 孵化後 24-48시간사이의 veliger 유생에서는 30.01‰에서부터 성층을 경계로 兩分되는 경향을 보였으나 72시간째의 veliger 유생은 하층 高 分層의 表層경계면에 群集하는 傾向이 强해졌다. The effects of light and sea water of reduced salinity on vertical distribution of swimming larvae of an abalone, Haliotis discus hannai, were studied in sea and laboratory experiments. Trochophores and veligers were negative geotaxis, and most of them were swarming on the surface without showing phototactic reaction. Veligers lost negative geotactic behavior after 72-90 hours from hatching. Low salimity water on the suface retard surface swarming of the larve. Compared to veligers trochophores were more tolerable to the low salinity. The salinity with affects the geotactic behavior was 24.5‰ and 30.01‰in trochophore veligers respectively.
眞珠조개, Pinctada fucata의 稚貝生産 및 養殖에 關한 環境學的 硏究-(4) 種苗量産化에 關한 基礎的 硏究
盧暹,卞忠圭 濟州大學校海洋資源硏究所 1987 해양과환경연구소 연구논문집 Vol.11 No.-
진주조개 Princtada fucata의 種苗生産技術開發을 위하여 室內水槽에서 殼高 51.5∼95.0㎜되는 母貝 982尾를 使用하여 各種 産卵誘發刺戟을 實施하고 母貝 反應率, 産卵生態, 各 發生段階에 達하는 積算水溫과의 關係를 調査하였다. 幼生期의 먹이生態를 알기 위하여 먹이生物의 種類, 投飾密度에 따른 名 幼生期의 食量, 成長, 生殘率, 海水比重에 따른 幼生의 耐性, 採苗器의 種類와 設置方法에 따른 附着數의 差異를 比較하였다. 附着稚貝를 利用하여 120日 海中育成을 實施하고 中間育成에 適當한 稚貝의 크기와 채롱내의 適正收容密度에 대하여 調査한 結果를 要約하면 다음과 같다. 1. 産卵誘發刺戟中 40∼60分의 干出刺戟後 直射光線을 利用한 水溫上昇方法이 가장 效果的이였으며, 이때의 母貝 反應率은 12.35∼59.42%였다. 2. 08:00∼09:00시에 産卵誘發刺戟을 實施한 경우 반응시간은 干出刺戟後 1∼3時間後인 10:00∼12:00시 사이로서 反應個體의 77.12%가 이때에 집중적으로 産卵하였다. 3. 水溫 21.7∼29.3℃ 範圍에서 名 幼生期에 이르기까지 水溫(X)과 孵化時間 (Y:Tro-chophore, D狀幼生 : 分, 초기각정기 이후 幼生 : 日)과의 사이의 關係式은 다음과 같이 表示되었다. Trochophore 幼生 : Y =-21.0113 X + 876.7249(r= 0.9733), D狀幼生 : Y =-21.9782 X + 1719.5152(r=0.9303), 初期殼頂期幼生 : Y=-0.7163X + 25.3230(r=0.9752), 殼頂期幼生 : Y=-1.0108X + 37.5844(r=0.9586), 成熟仔貝期 : Y=-0.6569X + 31.6218(r=0.8523). 4. 먹이生物로서 P. lutheri + C. simplex를 混合하여 먹인 것과 P. lutheri, C. simplex, Chlorella sp.를 單一먹이로 飼育한 경우 孵化後經過日數(X)에 따른 殼長(Y)의 成長 關係式은 Y =7.050X + 56.0477 (r=0.9939), Y =6.6881X + 55.6323 (r=0.9911) Y =4.3864X + 58.1607 (r=0.9687), Y =0.5829X + 71.8874 (r=0.9801)로 表示되었다. 5. P. lutheri의 密度에 따른 名 段階別幼生의 攝食率과의 關係에서 求해진 最大攝食量(MF)과 이에 도달하기 위한 適正먹이密度(OF)는 孵化後 1∼5日 幼生은 MF=418.76±34.95 cells/ml OF=6692.31 cells/ml 孵化後 6∼10日 幼生은 MF=1237.60±42.53 cells/ml OF=12958.39 cells/ml 孵化後 11∼15日 幼生은 MF=4891.00±297.88 cells/ml OF=45269.02 cells/ml 孵化後 16∼20日 幼生 MF=17639.33±460.37 cells/ml OF=45269.02 cells/ml 孵化後 21∼25日 幼生 MF=40651.33±444.95 cells/ml OF=56183.25 cells/ml였다. 6. 굴貝殼, Nylon 그물, PVC 平板을 利用한 採苗器材質에 따른 附着幼生數의 差異는 보이지 않았으나 採苗器의 設置方法에서는 垂直方向보다 水槽底面에 水平으로 깔아둔 方法이 현저하게 많은 편이었다. 7. 海中 中間育成에 適合한 크기는 生殘率의 견지에서 5㎜以上의 크기가 바람직하였고, 殼長 10㎜以內의 크기인 120日間의 飼育에서 채롱(φ20×20cm)의 收容密度 1∼6 個體/㎠에서의 成長 및 生殘率은 類似하게 나타났다. In order to develop the technique for seed production of a pearl oyster, Pinctada fucata, the successive experiments including the spawning induction, larval development, feeding ecology and growth of larvae, spat collection in rearing tank and culture of young pearl oysters in the sea were carried. Results obtained by these experiments are summarized as follows. 1. Stimulation with water temperature raised by heat of sunshine after exposing adults in the air for 30 to 60 minutes was most effective in spawning induction of P.fucata. 12.35∼59.24% of adults tested were spawned by this method. 2. Adults reacted in 1 to 3 hours after receiveing the stimulation of exposure and 77.12% of them spawned. 3. In a range of temperature, 21.7℃ to 29.0℃, relationships between water temperature(X, ℃) and time required(Y, trochophore and D-shaped larvae in min., after early umbo larvae in day) for development of each larval stage were expressed by following formulae; Trochophore ; Y =-21.0113X + 876.7349 (r= 0.9733) D-shaped ; Y =-21.9782x + 1719.5152 (r=0.9303) Early umbo ; Y=-0.7163X + 25.3230 (r=0.9752) Umbo ; Y=-1.0108X + 37.5844 (r=0.9586) Fully grown : Y=-0.6569X + 31.6218 (r=0.8523) 4. When the larvae after hatching were fed with three species of food organism, relationships between feeding duration (X, days) and growth of shell length (Y, ㎛) were expressed by following formulae ; Pavlova lutheri ; Y =6.6881X + 55.6323 (r=0.9911) Chaetoceros simplex ; Y =4.3864X + 58.1607 (r=0.9687) P.lutheri+C. simplex ; Y =7.050 + 56.0477 (r=0.9939) Chlorella sp. ; Y =0.5829X + 71.8874 (r=0.9801)
한상윤,Sum Rho,노경언,김진구 한국수산과학회 2018 Fisheries and Aquatic Sciences Vol.21 No.2
Interspecific hybridization experiments were conducted between the common seahorse Hippocampus kuda (male) and the slender seahorse H. reidi (female) during artificial rearing to develop a new aquarium fish with unique polyandrous mating. Molecular analysis via mitochondrial DNA (mtDNA) cytochrome b and nuclear DNA (ncDNA) ribosomal protein S7 gene supported the hybridization between the two species, and the hybrid also showed morphological characteristics of both species. Juveniles of H. kuda have dense melanophores on the whole body or only on the trunk and tail, whereas juveniles of H. reidi have thin melanophores on the whole body or present in stripes only along their prominent trunk and tail rings. However, all the hybrid juveniles had dense melanophores only on the tail, with the striped trunk rings, thus showing an intermediate pattern, and these patterns were limited to the fairly early stage of development (1–10 days old). In contrast, the two eye spines in the hybrid were apparent after 9 days old, which were not inherited from H. kuda (one eye spine), but from H. reidi (two eye spines). According to LOESS (local regression) analysis, the growth rate increased between 20 and 25 days, and the hybrids grew faster than H. kuda when they entered the explosive second phase of growth between 25 and 45 days for all the seahorses. This study highlights the hybridization between H. kuda and H. reidi may contribute to the improved taxonomic information of young seahorses