Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis)

Wirtz, Andrea; Carter, Chris; Codabaccus, Basseer M.; Fitzgibbon, Quinn P.; Townsend, Ashley T.; Smith, Gregory G.

doi:10.1016/j.cbpa.2021.111121

Cited by 12 publications

(11 citation statements)

References 41 publications

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“…Thus particle size and rate of digestion are likely important for optimising feed intake capacity and appetite revival between meals 26 . In this sense, rate of digestion is independent of apparent digestibility coefficient (ADC), since ADC and gut transit rate can be inversely correlated, 28 indicating that slower rates of gut transit facilitate more complete digestion. Alternatively, water‐soluble ingredients such as hydrolysates and sodium caseinate are likely to facilitate rapid transfer of feed to the gastric gland, making them rapidly available for assimilation and growth and freeing up foregut space for further feed ingestion.…”

Section: Feed Ingestion and Digestionmentioning

confidence: 99%

Recent advances and future directions in practical diet formulation and adoption in tropical Palinurid lobster aquaculture

Nankervis

Jones

2022

Reviews in Aquaculture

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The spiny lobsters Panulirus ornatus and Panulirus homarus are important developing tropical aquaculture species, with high demand and limited supply.The established industry in Vietnam relies on wild-caught mixed seafood bycatch as feed, a practice linked to water quality degradation and potentially disease proliferation in lobster aquaculture, necessitating formulated feed development. The emerging Indonesian and Australian industries lack the crustacean and mollusc component of the seafood bycatch used in Vietnam, increasing the need for manufactured feeds. The development of such feeds is reliant on knowledge of nutrient requirements, ingredient quality, physical feed requirements, and the link between feeding behaviour and feeding methods.This review will elaborate on the development of these knowledge areas to date and outline the two main reference diet recipes that are available as the basis for future research. Research to date has focused on developing a feed recipe that will be consumed and supports adequate growth rather than steering commercial least-cost formulation practices. Future research is clearly needed to inform formulation, but equally an understanding of the disparate emerging lobster farming industries and their drivers for the adoption of formulated feeds is required to ensure that such research is applied. This will require engagement throughout the supply chain to ensure that research is implementable and to address farmer perception toward formulated feeds. Technical aspects of feed manufacture and scale-up of feed developments will be critical to the adoption of research results, while validation through semi-commercial benchmarks and demonstration farm models are expected to increase commercial uptake of developed feeds.

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Section: Feed Ingestion and Digestionmentioning

confidence: 99%

Recent advances and future directions in practical diet formulation and adoption in tropical Palinurid lobster aquaculture

Nankervis

Jones

2022

Reviews in Aquaculture

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“…Consequently, little is known regarding the nutritional requirements of the slipper lobster, T. australiensis . While recent studies have started to explore their nutritional requirements and physiology in more detail 28 , 30 , 32 , 33 , the present study is the first to examine the importance of dietary Chol. For several crustacean species other than the slipper lobsters, there are some evidence that dietary PhosL may spare Chol 3 .…”

Section: Discussionmentioning

confidence: 99%

Essentiality of dietary cholesterol and its interactions with phospholipid in juvenile slipper lobster (Thenus australiensis)

Landman,

Codabaccus,

Nichols

et al. 2024

Sci Rep

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This study was conducted to verify the essentiality of dietary cholesterol for early juvenile slipper lobster, Thenus australiensis (initial weight 4.50 ± 0.72 g, mean ± SD, CV = 0.16), and to explore the potential for interactions between dietary cholesterol and phospholipid. An 8-week experiment was conducted using six experimental feeds containing three supplemental cholesterol concentrations (0, 0.2 and 0.4% dry matter) at two supplemental phospholipid concentrations (0% and 1.0% dry matter). Dietary cholesterol concentrations of ≥ 0.2% resulted in up to threefold greater weight gain compared to 0% dietary cholesterol, but without any significant main or interactive dietary phospholipid effect. An interaction was observed for lobster survival with lowest survival (46%) recorded for combined 0% cholesterol and 0% phospholipid compared to every other treatment (71–100%). However, all surviving lobsters at 0% dietary cholesterol, regardless of dietary phospholipid level, were in poor nutritional condition. Apparent feed intake (AFI) was significantly higher at dietary cholesterol ≥ 0.2% but was lower for each corresponding dietary cholesterol level at 1% dietary phospholipid. This implied that the feed conversion ratio was improved with supplemental phospholipid. In conclusion, this study confirms the essential nature of dietary cholesterol and that dietary phospholipid can provide additional benefits.

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“…There is substantial information about the nutrient requirements and physiology of spiny lobsters 4 – 7 . However, information on the nutritional physiology of T. australiensis is limited 2 , 8 , 9 , although it is well known that in the wild, slipper lobsters are primarily carnivorous scavengers preferring small benthic invertebrates including molluscs, polychaetes and crustaceans 10 . To our knowledge, information on nitrogen flux and protein turnover is lacking, both of which are vital for successful aquafeed development.…”

Section: Introductionmentioning

confidence: 99%

Application of a stoichiometric bioenergetic approach and whole-body protein synthesis to the nutritional assessment of juvenile Thenus australiensis

Williamson,

Carter,

Basseer Codabaccus

et al. 2023

Sci Rep

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The present study successfully combined a stoichiometric bioenergetic approach with an endpoint stochastic model to simultaneously determine specific dynamic action, metabolic substrate use and whole-body protein synthesis in juvenile slipper lobster Thenus australiensis. Juvenile lobsters were fasted for 48 h to investigate routine metabolism before receiving a single meal of formulated feed containing 1% 15N-labeled Spirulina. Postprandial oxygen consumption rate, dissolved inorganic carbon, and total nitrogen excretion returned to the pre-feeding level within 24 h. The rate of whole-body protein synthesis was 0.76 ± 0.15 mg CP g−1 day−1, with a significant reduction from 24 to 48 h post-feeding. The postprandial increase in whole-body protein synthesis accounted for 13–19% of total oxygen uptake. Protein was the primary energy substrate for 48 h fasted (45% oxygen consumption) and post-feeding lobster (44%), suggesting that dietary protein was not efficiently used for growth. The secondary energy substrate differed between carbohydrates in 48 h fasted and lipids in post-feeding lobsters. The present study recommends integrating protein synthesis into protein requirement experiments of marine ectotherms to acquire a more comprehensive picture of protein and energy metabolism and nutritional physiology crucial for formulating cost-effective aquafeeds.

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Protein sources influence both apparent digestibility and gastrointestinal evacuation rate in juvenile slipper lobster (Thenus australiensis)

Cited by 12 publications

References 41 publications

Recent advances and future directions in practical diet formulation and adoption in tropical Palinurid lobster aquaculture

Recent advances and future directions in practical diet formulation and adoption in tropical Palinurid lobster aquaculture

Essentiality of dietary cholesterol and its interactions with phospholipid in juvenile slipper lobster (Thenus australiensis)

Application of a stoichiometric bioenergetic approach and whole-body protein synthesis to the nutritional assessment of juvenile Thenus australiensis

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