ORCID Profile
0000-0002-7854-8135
Current Organisations
James Cook University
,
CSIRO
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Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.CBPB.2018.10.003
Abstract: Crustaceans are exposed to a range of environmental factors that can impact their condition, physiological function and growth. Condition indices are broadly defined as the extent to which stored nutrient reserves allow normal physiological function and growth, but can also represent more than nutrition alone. There is currently no reliable indicator to non-destructively measure shrimp physiological or nutritional condition. In this study, haemolymph and biochemical indices were benchmarked against a range of physiological status condition indicators, including haemolymph biochemistry parameters and carcass traits, in fed and unfed sub-adult black tiger shrimp (Penaeus monodon) and across the moult cycle. Results based on fluorescent marker injection and analysis of recovered amounts showed that haemolymph volume was elevated immediately after the moult, but decreased significantly within 2 days and remained stable for the remainder of the inter-moult period. Brix index (Brix) strongly correlated with haemolymph biochemical, shrimp condition and carcass composition indices. These included haemolymph volume, total protein and triglycerides, as well as gross energy, hepatosomatic index (HSI) and body weight gain per moult. Overall, results demonstrated that Brix was the simplest, fastest and most cost-effective indicator to accurately and non-destructively estimate physiological condition in P. monodon. Given the correlations with a broad range of indices, Brix may represent a more holistic estimate of condition, incorporating multifactorial aspects of shrimp condition including moult cycle and nutrition. Additionally, the baseline measurements of metabolites across the moult and under starvation conditions improves our fundamental understanding of overall condition in P. monodon.
Publisher: Elsevier BV
Date: 11-2017
DOI: 10.1016/J.JINSPHYS.2017.09.005
Abstract: Glowworms, members of the keroplatid fly genus, Arachnoc a, glow to attract prey. Here we describe substantial differences in the bioluminescence regulatory systems of two species one is a troglophile with populations both in caves and outside of caves in wet forest (Arachnoc a tasmaniensis) and the other has no known cave populations (Arachnoc a flava). We find that A. tasmaniensis is ready to initiate bioluminescence at any time darkness is encountered. In contrast, A. flava shows a homeostatic control of bioluminescence it is unlikely to initiate bioluminescence when exposed to dark pulses during the photophase and it does so with a long latency. Another difference between the two species is that A. tasmaniensis in iduals synchronize their bioluminescence in the dark zone of caves under the control of the circadian system and A. flava in iduals do not synchronize to each other, rather their circadian control system entrains to the light:dark cycle to promote nocturnal bioluminescence. Consequently, we produced a phase-response curve in response to photic entrainment under constant darkness for both species. The shape of the phase-response curves differs between the two species as does the overall sensitivity to the identical entrainment conditions. The phase-response curve of A. tasmaniensis facilitates synchronization whereas that of A. flava facilitates nocturnal glowing. The two-species comparison highlights possible pathways of ergence of circadian control of physiological functions that could be associated with the extreme ecological differences experienced in cave and surface habitats.
Publisher: Wiley
Date: 29-12-2022
DOI: 10.1111/RAQ.12780
Abstract: This review summarises the current knowledge of mineral nutrition for penaeid shrimp. It investigates how the aquatic environment and the lifecycle of shrimp affect requirements and the role that minerals play in shrimp health. Methods of supplying minerals via either water or to feed, and novel ways of supplementing minerals within feed, are discussed. The requirements for in idual minerals are summarised with recommendations for minimum levels of dietary inclusion for semi‐intensive and intensive commercial shrimp culture presented where data permits. Estimates of dietary requirement remain broad for most minerals for the main shrimp production species ( Penaeus vannamei , Penaeus monodon and Penaeus japonicus ), with some essential minerals remaining unstudied (Table 2 in Section 5.10). Mineral nutrition will become more important as intensification and ersification of production systems provide new challenges to shrimp aquaculture.
Location: Australia
No related grants have been discovered for Sarah Berry.