The first published study on rearing juvenile H. reidi (Olivotto et al., 2008) tested several variations of prey size and nature on growth and survival at 21 days. The feeding formula that gave the best results on both points consisted of nauplii of the harpacticoid copepod Tisbe spp. with rotifers 200+ μm long (to the 6th days of life) and copepodites/copepods and Artemia nauplii (from day 6). Under a 24L:00D photoperiod, seahorses reached about 25 mm TL (estimated from graph), which is roughly equivalent to the height we recorded (22.5 mm at 20 days) in the present study. However, final survival (intermediate values were not given) was much lower, 35% instead of 92.7% (at 20 days). One interpretation for the difference in mortality between the two H. reidi studies is that it resulted from feeding problems. This would fit with the observation that while lower quality food seems to invariably lead to higher mortality (e.g., Chang and Southgate, 2001; Job et al., 2002;Woods, 2003; Olivotto et al., 2008) it does not necessarily induce lower body growth in the survivors (e.g., Job et al., 2002). Feeding problems also furnish an explanation for the high death rates we observed at the beginning of the experiment between the introduction of Artemia nauplii and the withdrawal of natural zooplankton. While most of 100 μm-screened zooplankton could be too small at 6 days of age (as discussed earlier), Artemia nauplii may be relatively unsuitable at 3–5 days of age due to their large size. Brine shrimp nauplii are recognizable as being of low digestibility to seahorses (Payne and Rippingale, 2000), and a potential source of bacterial diseases even when decapsulated. Another anecdotal observation that may be related to elevated juvenile mortality is that a fraction among the younger (below 30 days of age) seahorses do not seem able to ingest whole mysids, either live or frozen, and appear to settle on the ingestion of a part of it (pers. obs.).
翻得差不多通顺就行 求帮忙啊!!
参考资料:强烈要求加分!
再翻一下呗 哈哈 是有点累的,差不多就行拉 都翻那么多了。。分都给你啦,再追加都行。