Foot injury survival in red abalone (Haliotis rufescens)

Loeher, Malina M.; Moore, James D.

doi:10.1016/j.aquaculture.2020.735734

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Digestive gland tubules were observed for evidence of atrophy and scored against a semi-quantitative digestive tubule atrophy scale modified from Weis et al (1993;Table 2), and categorised against images of digestive gland metaplasia (Couch 1985), and juvenile green abalone digestive gland (Serviere-Zaragoza et al 2016). The central pedal sole and side wall sections of the foot were examined for prevalence of histological alteration linked to potential loss of adhesion, including laceration injury, oedema, abscess, ulceration, epithelial erosion and cavitation of the pedal sole, lack of mucous cell secretion, vacuolation and necrosis of muscle fibres (Grenon & Walker 1978;Di et al 2012;Hooper et al 2014;Kang et al 2020;Loeher and Moore 2020;Li et al 2021).…”

Section: Sample Processing and Histological Analysismentioning

confidence: 99%

Size-dependent thermal limits in Australian hybrid abalone: implications for productivity shifts with ocean warming

Holland,

Smythe,

Clark

et al. 2023

Rev Fish Biol Fisheries

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Ocean warming and extreme heatwaves threaten marine species supporting commercial fisheries and aquaculture. Predicting the responses of these industries to chronic and acute warming depends on understanding which life stages are most vulnerable, the potential for stocks to adapt to changing thermal environments, and the availability of thermally adapted genotypes to help enhance stock resilience through strategic interventions. Here, we shed light on some of these knowledge gaps by quantifying the critical thermal maximum (CTmax) of ~ 10–210 g hybrid abalone (Haliotis rubra × H. laevigata) from two farms representing contrasting thermal environments from south-eastern Australia. CTmax was not dependent on body size or provenance (farm) when heating rates were rapid (1 °C per h), but a significant relationship between CTmax and body size was observed when heating rates were slower and more ecologically realistic (1 °C per 12 h). Histological analyses revealed a negative relationship between CTmax and the stage of gonadal development when abalone were exposed to chronic thermal stress conditions. These results suggest that marine heatwaves and ongoing ocean warming might favour smaller, less fecund animals in natural and farm settings. This could potentially impact future harvestable biomass, recruitment and population dynamics in wild-capture fisheries, and production of larger, high-value animals in farm settings. This study adds to a growing body of literature pointing to complex and often negative effects of climate change on commercial fisheries, and the potential need for interventions aimed at bolstering fisheries resilience against the effects of ocean warming.

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