| 于晓,唐文乔,王磊.2014.长江口凤鲚繁殖群体卵巢发育过程中的体内脂肪转移.动物学杂志,49(6):867-874. |
| 长江口凤鲚繁殖群体卵巢发育过程中的体内脂肪转移 |
| Crude Lipid Transition in Tissues during Ovary Development of Coilia mystus Living in the Estuary of Yangtze River |
| 投稿时间：2014-03-14 修订日期：2014-08-21 |
| DOI：DOI: 10.13859/j.cjz.201406010 |
| 中文关键词: 凤鲚 繁殖群体 脂肪含量 能量转移 长江口 |
| 英文关键词:Osbeck |
| 基金项目:公益性行业(农业)科研专项(201203065),高等学校博士学科点专项科研基金(20123104110006)；*通讯作者, E-mail：wqtang@shou.edu.cn；第一作者介绍 于晓,女,硕士研究生；研究方向：鱼类学；E-mail：xiaoyu2795@126.com。 阶段分别下降了7.29％和3.65％,而IV期至V期的晚期发育阶段则分别下降了4.49％和8.63％。这可能预示着肌肉储存的能量首先供给了繁殖活动早期的洄游和代谢,而肝胰腺储存的营养则可能是完成最后产卵过程的助推器。 |
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| 中文摘要: |
| 凤鲚是西太平洋一种短距离江海洄游的重要经济鱼类。为探讨其在溯河产卵洄游过程中卵巢发育的能量来源,本文对长江口凤鲚繁殖群体的雌性个体的性腺发育、摄食状况以及肝胰腺、肌肉和卵巢等的粗脂肪含量作了分析。结果显示,(1)凤鲚雌性个体的卵巢发育并不同步。繁殖初期的5月下旬以III期和 IV期个体为主,两者合占雌性个体的87%；之后,成熟个体逐渐增多,至繁殖期结束前的8月,V期个体占44.27%。(2)77％和90％的III、IV期雌性个体,以及所有V、VI期雌性个体均为空胃,但有93％的II期雌性个体胃充塞度为1级和2级,表明凤鲚雌性个体在繁殖期并不摄食,但产卵不久即开始摄食。(3)III期雌性个体的肌肉粗脂肪含量仅1.92%(鲜重,氯仿-甲醇法),而卵巢却聚集了身体总脂量的62.43%。这种将有限能量集中于繁殖器官的现象,可能是小型鱼类难于作长距离溯河产卵洄游的原因之一。(4)自III期至VI期,雌性个体肌肉和肝胰腺的脂肪含量共下降了12.5％和14.35％,其中III期至IV期的早期发育阶段分别下降了7.29％和3.65％,而IV期至V期的晚期发育阶段则分别下降了4.49％和8.63％。这可能预示着肌肉储存的能量首先供给了繁殖活动早期的洄游和代谢,而肝胰腺储存的营养则可能是完成最后产卵过程的助推器。 |
| 英文摘要: |
| Osbeck"s grenadier anchovy(Coilia mystus),an important economic species, migrates with short distance between river and sea in the western Pacific Ocean．To understand the energy source during ovary development, the process of ovary development, feeding, and crude fat content in hepatopancreas, muscle and ovary of spawning groups of female Coilia mystus in the estuary of Yangtze River were analyzed. The results showed that：(1)Oogenesis in Coilia mystus was not synchronous. In the early period of reproduction(in late May),87% of the female individuals were in phase III and IV. The number of mature female individuals was gradually larger. By the end of the spawning period (in August), individuals of phase V accounted for 44.27%.(2)77% of phase III individuals, 90% of phase IV, and all phase V, VI had nothing food in the stomach and gut. In contrast, 93% of phase II individuals were at fullness of degree 1 and 2, indicating that Coilia mystus fed nothing in the spawning period and began to take food soon after spawning.(3)The muscle fat content of female individuals with phase III oogenesis was only 1.92% (wet weight, by chloroform-methanol extraction, although ovary gathered 62.43% of the total crude fat of the whole body. Thus, Coilia mystus allocated most energy to propagative organ, possibly this is why small fish is difficult to spawning migration for long distance.(4)In total, fat content in muscle and hepatopancreas decreased by 12.5% and 14.35% from phase III to VI respectively. Thereinto, fat content in muscle and hepatopancreas decreased by 7.29% and 3.65% from phase III to IV respectively, in comparison with decrease of 4.49% and 8.63% from phase IV to V respectively．This result suggests that the nutrition stored in the muscle mainly supplies for the migration and the early multiplication, while nutrition in hepatopancreas could boost energy supply for the subsequent spawning process. |
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