Routes of water loss in South African abalone (Haliotis midae) during aerial exposure

Vosloo, André; Vosloo, Daléne

doi:10.1016/j.aquaculture.2006.06.015

Cited by 17 publications

(21 citation statements)

References 13 publications

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“…The mass loss during simulated export in this study is similar to the mass loss (15.06 ± 0.94%) in H. midae reported by Vosloo and Vosloo (2006). Those authors used radioactive tracer experiments to show that mass loss in H. midae was attributed to water loss and not tissue loss; water being lost through evaporation and mucus production in approximately equal amounts.…”

Section: Mass Loss (Simulated Export)supporting

confidence: 78%

“…Water content and body composition was determined by drying to a constant mass at 100 °C, as described by Vosloo and Vosloo (2006), and then weighing the shell. All results are reported per unit wet mass.…”

Section: Methodsmentioning

confidence: 99%

“…During the live export process abalone lose up to 15% of their body mass, mainly on account of loss of body water (Vosloo and Vosloo 2006), which can result in significant loss of foreign revenue.…”

Section: Introductionmentioning

confidence: 99%

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Exploring basic biochemical constituents in the body tissues of South African abaloneHaliotis midaereared in shore-based mariculture systems

Laas

Vosloo

2010

African Journal of Marine Science

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The study quantifies the effects of season, age and feeding regime on glucose, glycogen, proteins and lipids in abalone Haliotis midae tissues, and to assess water loss during simulated live export. Abalone of two age classes, younger (~30 months old) and older (~38 months old), were subjected to four dietary regimes: two single feeds, kelp and an artificial feed, and two rotational feeding regimes utilising kelp and the artificial feed in varying ratios. Total protein, free glucose, glycogen and total lipid content were determined in the digestive gland and foot/adductor muscle. One subset of older animals, from each feeding treatment, was subjected to water content analysis by drying. Subsets of older and younger animals were subjected to a simulated live export trial to determine mass loss. Digestive gland tissue proved to be of little value for routine monitoring. Muscle glucose, muscle lipid and muscle protein concentrations were affected by month and age. Muscle glycogen concentration was affected by month, age and feeding regime. During simulated export trials, animals lost on average 15% body mass, being significantly higher (p < 0.01) in younger compared to older animals. Feeding regime did not influence susceptibility to mass loss during export. Animal age influenced the biochemical composition and export performance of abalone.

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Section: Mass Loss (Simulated Export)supporting

confidence: 78%

Section: Methodsmentioning

confidence: 99%

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Exploring basic biochemical constituents in the body tissues of South African abaloneHaliotis midaereared in shore-based mariculture systems

Laas

Vosloo

2010

African Journal of Marine Science

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“…Metabolites in the tissue are further concentrated by water loss during air exposure. Water loss can range from 3% to 15% of total body weight and is mainly lost through evaporation and mucus production (James & Olley ; Vosloo & Vosloo ). Haemolymph volume also decreases by 30% which results from a redistribution of water to the tissues (Vosloo & Vosloo ).…”

Section: Physiological Response To Farmingmentioning

confidence: 99%

“…Water loss can range from 3% to 15% of total body weight and is mainly lost through evaporation and mucus production (James & Olley ; Vosloo & Vosloo ). Haemolymph volume also decreases by 30% which results from a redistribution of water to the tissues (Vosloo & Vosloo ). Most extended air exposures occur in adult abalone, but can also happen during larval transport from hatcheries to grow‐out facilities.…”

Section: Physiological Response To Farmingmentioning

confidence: 99%

Effects of environmental and farm stress on abalone physiology: perspectives for abalone aquaculture in the face of global climate change

Morash

Alter

2015

Reviews in Aquaculture

107

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Many abalone farms are reliant on coastal water inputs which are subject to fluctuations in environmental variables such as temperature, oxygen, CO 2 and salinity. Near future climate change scenarios predict that there will be more frequent extreme weather events which can exacerbate these fluctuations and potentially be deleterious to farmed abalone where these variables remain largely uncontrolled. In this review, we have taken an in depth examination of current literature on the effects of environmental stress on abalone physiology and metabolism and how this affects their health and growth. In conjunction, we have also reviewed the effects of farm-specific stressors such as ammonia, stocking density, handling, nutrition and disease and the synergistic effects of these and environmental stressors on abalone physiology. We have identified currents gaps in our knowledge of this under-studied species and have made predictions on the effects of climate change on future abalone production with suggestions for future research. In summary, it is expected that abalone will show reduced growth rates as more energy is invested in combating stresses rather than growth. Furthermore, disease outbreaks may become more frequent with greater fluctuations in temperature and salinity, both of which have large-scale effects on immunity. The current body of knowledge is mainly on whole animal effects of stresses, but we know very little of their mechanistic foundation. Research in this area as well as investments in infrastructure will be pivotal in identifying and implementing strategic interventions to maintain a sustainable abalone industry in Australia.

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Untargeted Metabolite Profiling of Abalone Using Gas Chromatography Mass Spectrometry

et al. 2015

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Routes of water loss in South African abalone (Haliotis midae) during aerial exposure

Cited by 17 publications

References 13 publications

Exploring basic biochemical constituents in the body tissues of South African abaloneHaliotis midaereared in shore-based mariculture systems

Exploring basic biochemical constituents in the body tissues of South African abaloneHaliotis midaereared in shore-based mariculture systems

Effects of environmental and farm stress on abalone physiology: perspectives for abalone aquaculture in the face of global climate change

Untargeted Metabolite Profiling of Abalone Using Gas Chromatography Mass Spectrometry

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