细纹鳎早期个体发育过程中生长和摄食特征的变化

Changes in Growth and Feeding Characteristics during Early Ontogenesis in Threadsail Filefish, .

作者信息

Xu Wengang, Zeng Jun, Mei Weiping, Jiang Lianglong, Manabe Soichiro, Wu Yanqin, Liu Liming

机构信息

School of Ocean, Yantai University, Yantai 264005, China.

Guangxi Academy of Sciences, Nanning 530007, China.

出版信息

Animals (Basel). 2023 Nov 4;13(21):3420. doi: 10.3390/ani13213420.

DOI:10.3390/ani13213420

PMID:37958175

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10648021/

Abstract

BACKGROUND

We investigated the growth and feeding characteristics of threadsail filefish, , during early ontogenesis.

METHODS

The growth indices of hatchlings fed compound feed were measured from 0 to 50 days post hatching (dph). The absorption time of the yolk sac and oil globule, as well as the rate of first feeding were measured to characterise the early growth stage and determine the point-of-no-return (PNR). Feeding characteristics and rhythms were investigated under a light/dark cycle and under continuous light.

RESULTS

Growth indices increased significantly at 24, 28, 30, 40, 45, and 50 dph. The yolk sac and oil globules were completely absorbed before 4 dph, indicative of a short mixed-nutrition period at 3-4 dph. Under starvation conditions, the first feeding rate was highest (86%) at 0.5 dph and then decreased to 53.3% at 1.5 dph and 26.2% at 2 dph, suggesting that the PNR occurs at 1.5-2 dph. The feeding peak appeared at 15:00-18:00 and under light conditions, while the feeding trough appeared at 0:00-3:00.

CONCLUSIONS

Compound feed supplied adequate nutrition for early growth and development. The peaks and troughs of feeding times were indicative of daytime feeding behaviour. These results provide guidance for successful rearing of filefish seedlings and juveniles.

摘要

背景

我们研究了线纹单棘鲀在个体发育早期的生长和摄食特性。

方法

测量孵化后0至50天（dph）投喂配合饲料的仔鱼的生长指标。测量卵黄囊和油球的吸收时间以及初次摄食率，以表征早期生长阶段并确定不可逆点（PNR）。在光照/黑暗周期和持续光照条件下研究摄食特性和节律。

结果

生长指标在24、28、30、40、45和50 dph时显著增加。卵黄囊和油球在4 dph之前完全吸收，表明在3 - 4 dph时有一个短暂的混合营养期。在饥饿条件下，初次摄食率在0.5 dph时最高（86%），然后在1.5 dph时降至53.3%，在2 dph时降至26.2%，表明不可逆点出现在1.5 - 2 dph。摄食高峰出现在光照条件下的15:00 - 18:00，而摄食低谷出现在0:00 - 3:00。