Restricting feed ration has more effect than diet type on the feeding behaviour of greenlip abalone<i>Haliotis laevigata</i>

Energy budgets were developed for greenlip abalone (Haliotis laevigata) under different feeding scenarios to predict growth, metabolic and waste outputs. The energy budgets of abalone fed live macroalgae (Ulva sp. or Gracilaria cliftonii) and an equal mix of those two macroalgae species with and without nutrient enrichment, or one of three control formulated commercial diets, at 22°C for 93 days were investigated. Among non‐enriched algal treatments, abalone fed G. cliftonii and mixed diet treatments had significantly higher ingested feed energy and absorbed energy than those fed Ulva sp. Abalone fed non‐enriched G. cliftonii invested significantly more energy into somatic growth than those fed Ulva sp. and the mixed diet treatment. For diets with nutrient enrichment, ingested feed energy and absorbed energy rate of abalone fed G. cliftonii and mixed diet treatments were significantly higher than those fed Ulva sp. Nutrient enrichment increased crude protein in live macroalgae, and ammonia excretion energy rate was higher for abalone fed enriched macroalgae compared to non‐enriched. Abalone fed the control commercial diets spent more energy in all components compared to those fed the live macroalgae treatments. The major component of the energy budgets in abalone fed the commercial diets and live macroalgae diets was somatic growth energy, ranging from 25.5% to 37.7% of ingested feed energy, except for abalone fed live Ulva sp. where the major component was respiration energy (38.5%). Overall, abalone fed the formulated diets or live non‐enriched G. cliftonii could increase ingested feed energy, absorbed energy and somatic growth energy.

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“…Feeding time and amount were established using information from Buss et al. (2015) and Stone et al. (2013).…”

Section: Methodsmentioning

confidence: 99%

‘Energy budgets for greenlip abalone ( Haliotis laevigata Donovan) fed live macroalgae compared to commercial formulated diets’

et al. 2020

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“…Haliotis sp. is real nocturnal animal though abalone also feeds actively at daylight (Buss et al 2015;Roussel et al 2020). In terms of farming management point of view, such H. squamata feeding response behavior is important for controlling feeding time and feed proportion, the feed proportion given in the evening is supposed to be more than in the morning period.…”

Section: Choice Feedingmentioning

confidence: 99%

Feeding preference and growth response of early adults abalone, Haliotis squamata on some macroalgae

et al. 2020

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Abstract. Yusup DS, Mahardika IG, Suarna IW, Giri INA. 2020. Feeding preference and growth response of early adults abalone, Haliotis squamata on some macroalgae. Biodiversitas 21: 4369-4375. Study on early adult Haliotis squamata fresh feed has evaluated some macroalgae, however, a study on Enteromorpha sp., Halymenia sp., and Hypnea sp. have not been carried out. This study was proposed to evaluate the feeding preference (feed response and feed intake) and the growth performance of early adult H. squamata on some macroalgae. Seven species of macroalgae were evaluated as unpair feeding choice and the experiment design employed was completely randomized design. The results showed that H. squamata responded variously to the seven macroalgae species and the food deprivation (fasting) data showed mounting response to all macroalgae. Ulva lactuca and Enteromorpha sp. were the most responded which up to four times higher compared to the least responded i.e. Halymenia sp. and Sargassum sp. The highest to the lowest palatable feed intake (FI) were Gracillaria sp, Eucheuma spinosum, Ulva lactuca, Halymenia sp., Enteromorpha sp., Sargassum sp. and Hypnea sp. respectively. The first four palatable macroalgae resulted in various growth responses of H. squamata. Except for Halymenia sp., the feed intake (FI) rate showed an opposite linear correlation to growth response and FCR. The daily growth rate (g/day) was Ulva lactuca (0.104), Enteropmorpha sp. (0.085), Gracillaria sp. (0.084), and Halymenia sp. (0.016).

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“…H. asinina is a relatively active species, which exhibits rapid escape responses following disturbances, resulting in a fast increase in metabolic rate reaching levels, which were approximately 5.5 times higher than values for resting abalone (Baldwin et al 2007). In addition, foraging behaviour can be metabolically costly due to increased muscle activity and secretion of protein-rich mucous (Allen et al 2006;Buss et al 2015). Greenlip abalone, H. laevigata, kept on a restricted ration, had higher locomotion activity in search for food than abalone on an unlimited food supply (Buss et al 2015), which suggests that sedentary behaviour in haliotids is a strategy to reduce energy expenditure.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, foraging behaviour can be metabolically costly due to increased muscle activity and secretion of protein-rich mucous (Allen et al 2006;Buss et al 2015). Greenlip abalone, H. laevigata, kept on a restricted ration, had higher locomotion activity in search for food than abalone on an unlimited food supply (Buss et al 2015), which suggests that sedentary behaviour in haliotids is a strategy to reduce energy expenditure.…”

Section: Introductionmentioning

confidence: 99%

Behavioural responses of farmed South African abalone Haliotis midae L. to disturbances caused by husbandry procedures

2016

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The South African abalone, Haliotis midae L., is an important mariculture species. In the natural environment, abalone move and migrate to new sites to escape from disturbances. This is the first study that tested the effect of disturbances on movement and feeding activity of farmed abalone for 6 days post-disturbance. Disturbances were (a) turning over the feeder plate, (b) moving and shaking the feeder plate and (c) briefly lifting the basket containing the abalone out of the water. Abalone in the control treatment were not subjected to disturbance. Activity levels of abalone were elevated in the first 1-2 nights post-disturbance with 2-3 times more abalone appearing on the walls of the baskets and larger numbers on the feeder plate than in the control treatment. Feed uptake was not influenced by treatment. Thus, even minor disturbances resulted in increased activity. As it takes at least 1 year to conduct growth experiments in this slow-growing mollusc, the results provide a motivation for studies of growth and metabolic rate in this species under a range of husbandry conditions, such as regular handling, sorting and moving of abalone.

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Restricting feed ration has more effect than diet type on the feeding behaviour of greenlip abaloneHaliotis laevigata

Cited by 26 publications

References 24 publications

‘Energy budgets for greenlip abalone ( Haliotis laevigata Donovan) fed live macroalgae compared to commercial formulated diets’

‘Energy budgets for greenlip abalone ( Haliotis laevigata Donovan) fed live macroalgae compared to commercial formulated diets’

Feeding preference and growth response of early adults abalone, Haliotis squamata on some macroalgae

Behavioural responses of farmed South African abalone Haliotis midae L. to disturbances caused by husbandry procedures

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