Does Morning as Opposed to Night-time Feeding Affect Growth in Juvenile Spiny Lobsters, Jasus edwardsh?

Abstract

Previous research on juvenile lobsters has shown that they display a nocturnal rhythm in their oxygen consumption and ammonia excretion, such that lobsters that are fed in the morning have shorter specific dynamic action (SDA) response than those lobsters that are fed at night. It was therefore suggested that juvenile lobsters should be fed in the morning to maximize energy utilization. This research tested the hypothesis that the growth of juvenile rock lobsters would be improved by feeding in the morning rather at night. Juvenile spiny lobsters Jasus edwardsii were fed a squid meal (5% body weight) either in the morning or at night over a period of 80 d. Lobsters fed in the morning had a 108% weight gain, an increase of 4.6 mm in carapace length and a growth rate (SGR) of 0.92%. These were significantly higher than the 78% weight gain, carapace length increase of 3.8 mm, and growth rate of 0.76% recorded for lobsters fed at night. Abdomen muscle protein and mid‐gut gland lipid and glycogen content were similar after 80 d. The digestive gland index (DGI) was the same in lobsters exposed to the different feeding regime but had decreased compared with control lobsters at the start of the experiment. Morning‐fed lobsters outperformed night‐fed lobsters in all aspects of growth and survival, and it is suggested that commercial farmers feed their lobsters in the morning rather than at night. Because these growth differences were predicted from specific dynamic action measurements, it is concluded here that this technique would be useful for the rapid evaluation of the effectiveness of natural and artificial diets on lobster growth.

Optimization of the stocking parameters for mud spiny lobsterPanulirus polyphagus(Herbst, 1793) capture-based aquaculture in tropical open sea floating net cages

“…Hence, we assume that feed type and feeding regime will not have significant effect on the present experiment. Radford and Marsden () reported that feeding lobsters at morning hours during culture practices maximizes their energy utilization thereby improving growth rates.…”

Working Hour Alllocation Strategy In Lobster Grow-Out Farming In Lombok Island

“…Unlimited demand endorsed lobster business as a profitable fishing enterprise. Increasing global demand, a high market value, and sustainability concern of wild stocks have created significant interest in spiny lobster aquaculture development (Radford & Marsden, 2005;Simon & James, 2007). Aquaculture and enhancement were come up as a commercially viable alternative to increase global supply of lobsters.…”

Effect of Water Salinity on Ovarian Maturation Stages and Embryonic Development of Mud Spiny Lobster, Panulirus polyphagus

“…Increasing global demand, a high market value and concern for the sustainability of wild stocks have created significant interest in the development of spiny lobster aquaculture (Radford and Marsden, 2007;Solanki et al, 2012). This high level of exploiting the breeding population may have an adverse effect on the recruitment of the juveniles, thus affecting the future of entire population.…”