中国水产科学Issue(3)：503-510,8.DOI:10.3724/SP.J.1118.2014.00503
斜带石斑鱼（♀）×鞍带石斑鱼（♂）杂交子代仔、稚鱼的异速生长
Allometric growth of hybrid grouper (Epinephelus coioides ♀×E. lanceolatus♂) larvae and juveniles
摘要
Abstract
We evaluated the pattern of allometric growth in hybrid Qinglong grouper [Epinephelus coioides (♀)×E. lanceolatus (♂)] during the larval and juvenile stages. We measured the total length, pre-anal length, trunk height, head length, eye diameter, mouth width, the second dorsal fin spine, pelvic fin spine, pectoral fin, anal fin, and tail fin of Qinglong grouper (from hatch to 28 d) and captured images of each individual using Q-Capture Pro 6. The average total length of newly hatched larvae was (1.62±0.26) mm. After 28 d, the total length of juveniles was (16.58±1.09) mm at a water temperature of (30±1)℃ and a salinity of 28±1. The growth in total length of Qinglong grouper was divided into three stages. The growth rate during the first, second, and third stages was 0.11 mm/d (from hatch to 7 d), 0.37 mm/d (from 8 to 21 d), and 1.51 mm/d(22 d afterwards), respectively. There was a significant difference in the growth rate between larval and juvenile stages (P<0.05). Some of the organs exhibited allometric growth in early ontogeny. Head length and trunk height were positively allometric up to the inflexion point, then switched to isometric and negatively allometric, respectively. Pre-anal length was characterized by isometric growth and had no inflexion point during the larval and juvenile stages. The growth in the head (inflexion point at 21-22 d) and sensory organs (inflexion point at 20-21 d) was positive up to the inflexion point, then became isometric and negatively allometric, respectively. The second dorsal fin spine and pelvic fin spine exhibited strong positive allometry at first, before becoming negatively al-lometric. The inflexion point of the second dorsal fin spine was between 20 and 21 d, whereas that of the pelvic fin spine was at 17 d. The second dorsal fin spine and pelvic fin spine reached a maximum at 24 d. From hatch to day 26, pectoral and tail fin growth was positively allometric, and their inflexion points were between 14 and 15 d, and 22 and 23 d, respectively. Anal fin growth was positively allometric and had no inflexion point. This pattern of growth results in rapid improvement in swimming ability, thereby allowing individuals to search for food and escape predators. Our results suggest that the organs involved in feeding, sensing, and swimming developed most rapidly during the early de-velopmental stages in Qinglong grouper. To increase the survival rate of Qinglong grouper during early life stages, it is critical to provide environmental conditions that account for the priority order of organ development.关键词
斜带石斑鱼/鞍带石斑鱼/杂交子代/仔鱼/稚鱼/异速生长Key words
Epinephelus coioides/Epinephelus lanceolatus/hybride/larva/juvenile/allometry分类
农业科技引用本文复制引用
吴水清,李加儿,区又君,吕国敏,刘江华..斜带石斑鱼（♀）×鞍带石斑鱼（♂）杂交子代仔、稚鱼的异速生长[J].中国水产科学,2014,(3):503-510,8.基金项目
广东省海洋渔业科技推广专项(B201101B04) （B201101B04）
中国水产科学研究院基本科研业务费专项(2012A0703) （2012A0703）
中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院南海水产研究所)资助项目(2012TS30,2012TS31) （中国水产科学研究院南海水产研究所）
