Effects of habitat on reef fishes biodiversity and composition in rocky reefs

Xu, Zhaoyi; Tanaka, Kisei R.; Mazur, Mackenzie; Wang, Kai; Chen, Yong; Zhang, Shouyu

doi:10.3354/ab00731

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…The fish has also been found to associate with drifting algae at early juvenile stage and with rocky reefs at recruitment stage (Biswas et al, 2008; Xiao et al, 2019). Due to its vulnerability to overfishing and habitat degradation (Zeng et al, 2020), this species is anticipated to be at high risk of population decline. Stock enhancement programs to conserve this vulnerable species have been widely implemented in China in recent years.…”

Section: Introductionmentioning

confidence: 99%

Environmental enrichment improves behaviors rather than the growth and physiology of rock bream Oplegnathus fasciatus

Li,

Zhou,

et al. 2023

Journal of Fish Biology

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Environmental enrichment has the potential to improve the welfare and post‐release survival of hatchery fish stocked for conservation purposes. However, effectiveness of environmental enrichment is partly dependent on fish species, life stage and specific enrichment structure used. To enhance the effectiveness of environmental enrichment, it is crucial to focus on characteristic differences in enrichment structures, such as type and level. This study investigated how differences in enrichment type and level affected physiological and behavioural aspects of the welfare of pre‐release juvenile rock bream Oplegnathus fasciatus, by evaluating growth performance, basal and stressed cortisol levels, antioxidant enzyme activities and exploratory behaviours regarding anxiety and flexibility. Fish were reared for four weeks in different enrichment treatments: barren, low‐level cover structure (LC), high‐level cover structure (HC), low‐level interference structure (LI) and high‐level interference structure (HI). The results revealed that fish reared with the LI treatment showed less anxiety and greater flexibility with respect to exploratory behaviours, without oxidative damage detected. Despite exhibiting less anxiety as well, fish reared in the HI treatment had oxidative damage indicated by lower superoxide dismutase activity, compared to those in the barren treatment. In addition, none of these enrichment structures enhanced growth performance or mitigate chronic and acute stress responses. Overall, the low‐level interference structure may be more favourable in promoting behavioural welfare of the fish. Application of this type and level of enrichment may increase the survival of the hatchery fish after release, which is critical to stocking success.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Environmental enrichment improves behaviors rather than the growth and physiology of rock bream Oplegnathus fasciatus

Li,

Zhou,

et al. 2023

Journal of Fish Biology

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Assemblage structure and spatial diversity patterns of kelp forest-associated fishes in Southern Patagonia

et al. 2021

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Knowledge of the ecology of the fish fauna associated with kelp (primarily Macrocystis pyrifera) forests in Southern Patagonia is scarce, especially in how abiotic and biotic variables influence their structure, diversity, and distribution. This information is important for the management and conservation of this unique ecosystem, which has minimal anthropogenic impacts at present. We analyzed data from 122 quantitative underwater transects conducted within kelp forests at 61 stations from Chile’s southern Patagonian fjords to the Cape Horn and Diego Ramirez archipelagos and the southern tip of Argentina, including the Mitre Peninsula and Isla de los Estados. In total, 25 fish species belonging to 13 families were observed. Multivariate analysis indicated that there are significant differences in fish assemblage structure among locations and wave exposures, which was driven primarily by Patagonotothen sima and Paranotothenia magellanica, which occurred on exposed and semi-exposed stations. P. cornucola was mainly distributed across sheltered stations of the Kawésqar National Park. Temperature, salinity, depth, and kelp density influenced fish assemblage structure, with the highest diversity in areas with the lowest temperature and greater depth at Isla de los Estados. In contrast, species richness, diversity, abundance, and biomass were all lower in areas with high density of the understory kelp Lessonia spp., which might be driven by the absence of P. tessellata, P. squamiceps and P. cornucola, the most important species in terms of occurrence, abundance, and biomass. Our study provides the first broad-scale description of the fish assemblages associated with kelp forests along the southern cone of South America based on non-invasive visual transects, improving our knowledge of the distribution of fish assemblages across several environmental conditions in this vast and little-studied area.

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Effects of habitat on reef fishes biodiversity and composition in rocky reefs

Cited by 2 publications

References 46 publications

Environmental enrichment improves behaviors rather than the growth and physiology of rock bream Oplegnathus fasciatus

Environmental enrichment improves behaviors rather than the growth and physiology of rock bream Oplegnathus fasciatus

Assemblage structure and spatial diversity patterns of kelp forest-associated fishes in Southern Patagonia

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