Visual and chemical stimuli from live prey affect feed intake, weight gain, and growth of juvenile Florida pompano (Trachinotus carolinus)

IF 2.2 3区农林科学 Q2 FISHERIES Aquaculture International Pub Date : 2024-07-17 DOI:10.1007/s10499-024-01626-w

Caio A. Miyai, Tânia M. Costa, Rodrigo E. Barreto, Fernanda P. Corrêa, Alex Squadrito, Michael H. Schwarz

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Abstract

This study investigated the influence of visual and chemical stimuli from live prey on juvenile Florida pompano (Trachinotus carolinus) growth. Twelve tanks within four independent recirculating systems housed fish of similar weight (obtained from a commercial fish farm) in groups of ten. Prior to their morning feeding (they were fed twice daily at 10 h and 16 h with commercial pellets), fish were exposed to one of four stimuli: visual and chemical cues from Artemia, mole crab, feed pellets (control for stimuli), or seawater (control for procedures). Key growth parameters were monitored weekly for seven weeks, including feed intake, weight gain, and specific growth rate (SGR). Fish exposed to Artemia and mole crab stimuli exhibited significantly higher feed intake (23.11 ± 1.37 and 23.45 ± 1.38 g/fish), weight gain (169.28 ± 7.59 and 172.75 ± 12.57%), and SGR (2.02 ± 0.05 and 2.04 ± 0.09% day⁻¹) compared to those exposed to feed pellets (stimuli control) and seawater (procedures control): feed intake (20.81 ± 0.684 and 19.30 ± 0.39 g/fish), weight gain (136.25 ± 4.51 and 140.23 ± 6.36%), and SGR (1.75 ± 0.03 and 1.78 ± 0.05%.day⁻¹). These findings highlight the importance of visual and chemical cues from live prey as feeding incitants and stimulants. By enhancing feeding motivation and intake, these stimuli promote growth and potentially improve the welfare of juvenile Florida pompano.

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活猎物的视觉和化学刺激影响佛罗里达鲳鱼（Trachinotus carolinus）幼鱼的摄食量、增重和生长

本研究调查了活猎物的视觉和化学刺激对佛罗里达鲳鱼（Trachinotus carolinus）幼鱼生长的影响。在四个独立的循环系统中的十二个水箱中饲养了体重相近的鱼（从商业养鱼场获得），每十条为一组。在早上喂食之前（每天 10 点和 16 点喂食两次商品颗粒饲料），鱼会受到四种刺激中的一种刺激：来自蒿草的视觉和化学线索、鼹鼠蟹、颗粒饲料（刺激对照）或海水（程序对照）。在为期七周的时间里，每周监测一次主要生长参数，包括摄食量、增重和特定生长率（SGR）。与暴露于黄颡鱼和蝼蛄刺激物的鱼类相比，暴露于黄颡鱼和蝼蛄刺激物的鱼类的摄食量（23.11 ± 1.37 和 23.45 ± 1.38 克/尾）、增重（169.28 ± 7.59 和 172.75 ± 12.57%）和 SGR（2.02 ± 0.05 和 2.04 ± 0.与暴露于颗粒饲料（刺激对照组）和海水（程序对照组）的鱼类相比，暴露于颗粒饲料（刺激对照组）和海水（程序对照组）的鱼类摄食量（20.81 ± 0.684 和 19.30 ± 0.39 克/尾）、增重（136.25 ± 4.51 和 140.23 ± 6.36%）和 SGR（1.75 ± 0.03 和 1.78 ± 0.05%.日-1）。这些发现凸显了来自活猎物的视觉和化学线索作为摄食诱因和刺激物的重要性。通过提高摄食动机和摄食量，这些刺激物可促进佛罗里达鲳鱼幼鱼的生长，并有可能改善其福利。

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来源期刊

Aquaculture International 农林科学-渔业

CiteScore

5.10

自引率

6.90%

发文量

204

审稿时长

1.0 months

期刊介绍： Aquaculture International is an international journal publishing original research papers, short communications, technical notes and review papers on all aspects of aquaculture. The Journal covers topics such as the biology, physiology, pathology and genetics of cultured fish, crustaceans, molluscs and plants, especially new species; water quality of supply systems, fluctuations in water quality within farms and the environmental impacts of aquacultural operations; nutrition, feeding and stocking practices, especially as they affect the health and growth rates of cultured species; sustainable production techniques; bioengineering studies on the design and management of offshore and land-based systems; the improvement of quality and marketing of farmed products; sociological and societal impacts of aquaculture, and more. This is the official Journal of the European Aquaculture Society.