提高环境富集的有效性：光照强度在岩鲷（Oplegnathus fasciatus）饲养中的作用

IF 2.2 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Applied Animal Behaviour Science Pub Date : 2024-11-07 DOI:10.1016/j.applanim.2024.106421

Zhe Li , Jingjing He , Shanshan Zhou , Jie Ying , Kaida Xu

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引用次数: 0

摘要

环境增殖是提高为保护目的放流的孵化鱼类的适应性和存活率的一种潜在方法。据推测，其有效性不仅取决于物理富集的生态相关特征，还取决于所应用的光照条件。尽管很重要，但很少有研究报道光照在增殖饲养中的作用。本研究试图通过调节光照强度来优化岩鳊（Oplegnathus fasciatus）幼鱼的强化饲养，尤其是在其生理和行为表现方面。研究人员将幼鱼饲养在标准鱼缸（无强化）或装有聚乙烯绳的强化鱼缸中，模拟在三种不同光照强度（400、800 或 1600 勒克斯）下漂流的藻类，为期 32 天。我们的研究结果表明，即使在有物理结构的情况下，鱼体的皮质醇水平也会随着光照强度的增加而增加。光照强度对生长没有明显影响。与标准鱼类相比，在所有光照强度下，富集饲养的鱼类尾鳍损伤和皮质醇水平都更高，表明慢性应激增加；此外，鱼类表现出更高的寻求庇护行为。这些结果凸显了保持低光照强度以减少鱼类慢性应激的重要性。此外，还建议调整富集饲养条件，以减轻对生理方面的不利影响，然后再在鱼种增殖计划中实际实施。

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Improving effectiveness of environmental enrichment: The role of light intensity in rock bream (Oplegnathus fasciatus) rearing

Environmental enrichment is a potential approach to enhance the fitness and survival of hatchery fish stocked for conservation purposes. Its effectiveness presumably depends not only on ecologically relevant features of physical enrichment but also on light condition applied. Despite the importance, few studies have reported on the role of light in enriched rearing. This study sought to optimize the enriched rearing of juvenile rock bream (Oplegnathus fasciatus) particularly regarding their physiological and behavioral performance by regulating light intensity. Juveniles were reared in either standard tanks (no enrichment) or enriched tanks with polyethylene ropes simulating drifting algae at three different light intensities (400, 800 or 1600 lux) for 32 days. Our findings revealed that cortisol levels of the fish increased with light intensity even in the presence of the physical structure. No significant effect of light intensity was detected on growth. Compared to standard fish, fish reared with enrichment showed higher levels of caudal fin damage and cortisol at all the light intensities, suggesting increased chronic stress; in addition, the fish displayed higher shelter-seeking behavior. These results highlight the importance of maintaining low light intensities to minimize chronic stress in the fish. Moreover, adjustments to the enriched rearing condition are recommended to mitigate adverse effects on physiological aspects before incorporated into practical implementation in stock enhancement programs.

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来源期刊

Applied Animal Behaviour Science 农林科学-行为科学

CiteScore

4.40

自引率

21.70%

发文量

191

审稿时长

18.1 weeks

期刊介绍： This journal publishes relevant information on the behaviour of domesticated and utilized animals. Topics covered include: -Behaviour of farm, zoo and laboratory animals in relation to animal management and welfare -Behaviour of companion animals in relation to behavioural problems, for example, in relation to the training of dogs for different purposes, in relation to behavioural problems -Studies of the behaviour of wild animals when these studies are relevant from an applied perspective, for example in relation to wildlife management, pest management or nature conservation -Methodological studies within relevant fields The principal subjects are farm, companion and laboratory animals, including, of course, poultry. The journal also deals with the following animal subjects: -Those involved in any farming system, e.g. deer, rabbits and fur-bearing animals -Those in ANY form of confinement, e.g. zoos, safari parks and other forms of display -Feral animals, and any animal species which impinge on farming operations, e.g. as causes of loss or damage -Species used for hunting, recreation etc. may also be considered as acceptable subjects in some instances -Laboratory animals, if the material relates to their behavioural requirements