| DENG Yuewen,YU Ziniu,DU Xiaodong,WANG Qingheng,FU Shao. 2011. Growth performance and physiological parameters of the second generation selected and control groups of Pinctada martensii. Acta Oceanologica Sinica, (2):120－125 |
| Growth performance and physiological parameters of the second generation selected and control groups of Pinctada martensii |
| Growth performance and physiological parameters of the second generation selected and control groups of Pinctada martensii |
| Received:June 13, 2010 Revised:December 02, 2010 |
| DOI：10.1007/s13131-011-0112-9 |
| Key words:Pinctada martensii the second generation selected group growth genetic gains physiological parameters |
| 中文关键词: Pinctada martensii the second generation selected group growth genetic gains physiological parameters |
| 基金项目:The National Key Technology R&D Program in the 11th Five Year Plan of China under contract No. 2007BAD29B01-2; National Department Public Benefit Research Foundation under contract No. nyhyzx 07-048; Guangdong Marine and Fishery Bureau under contract Nos A200708C01, A200908A02 and A200908A05. |
| Author Name | Affiliation | E-mail | | DENG Yuewen | Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China | | | YU Ziniu | South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China | | | DU Xiaodong | Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China | duxd@gdou.edu.cn | | WANG Qingheng | Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China | | | FU Shao | Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China | |
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| Abstract: |
| In May of 2007, the second generation selected (SS) and control (SC) groups of pearl oyster Pinctada martensii were established by selecting 10% breeders with the largest and mean shell length, respectively, from the first generation selected group. Growth performance of the SS and SC groups were compared on the basis of measurement data at Days 8, 18, 60, 95, 195 and 365. On Day 365, 100 individuals (60.0-75.0 mm at shell length) were sampled from each group and then subjected to the experiment where physiological parameters such as filtrate rate, oxygen consumption and ammonia excretion were measured at 15, 20, 25 and 30 ℃. The results show that the SS group had significantly larger mean shell length and shell height than the SC group at Days 8, 18, 60, 95, 195 and 365 (P <0.05). The genetic gains at different ages varied from 6.0% to 17.0% for shell length and 5.7% to 14.6% for shell height, respectively. At 15, 20, 25 and 30 ℃, the SS groups had significantly larger filtrate rate than the SC group (P <0.05). At 15 and 25 ℃, the differences in oxygen consumption rate between the SS and SC groups were not significant (P >0.05). At 20 and 30 ℃, however, the oxygen consumption rate of the SS group was significantly larger than the SC group (P <0.05). At 15, 20, 25 and 30 ℃, there were no significant differences in am- monia excretion rate between the SS and SC groups (P >0.05). The present results indicate that there existed considerable genetic variability in the base population and a further selection could be likely fruitful. Mass selection for faster growth might produce animals that had higher intake of metabolizable energy by virtue of faster filtrating behavior. |
| 中文摘要: |
| In May of 2007, the second generation selected (SS) and control (SC) groups of pearl oyster Pinctada martensii were established by selecting 10% breeders with the largest and mean shell length, respectively, from the first generation selected group. Growth performance of the SS and SC groups were compared on the basis of measurement data at Days 8, 18, 60, 95, 195 and 365. On Day 365, 100 individuals (60.0-75.0 mm at shell length) were sampled from each group and then subjected to the experiment where physiological parameters such as filtrate rate, oxygen consumption and ammonia excretion were measured at 15, 20, 25 and 30 ℃. The results show that the SS group had significantly larger mean shell length and shell height than the SC group at Days 8, 18, 60, 95, 195 and 365 (P <0.05). The genetic gains at different ages varied from 6.0% to 17.0% for shell length and 5.7% to 14.6% for shell height, respectively. At 15, 20, 25 and 30 ℃, the SS groups had significantly larger filtrate rate than the SC group (P <0.05). At 15 and 25 ℃, the differences in oxygen consumption rate between the SS and SC groups were not significant (P >0.05). At 20 and 30 ℃, however, the oxygen consumption rate of the SS group was significantly larger than the SC group (P <0.05). At 15, 20, 25 and 30 ℃, there were no significant differences in am- monia excretion rate between the SS and SC groups (P >0.05). The present results indicate that there existed considerable genetic variability in the base population and a further selection could be likely fruitful. Mass selection for faster growth might produce animals that had higher intake of metabolizable energy by virtue of faster filtrating behavior. |
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