eCite Digital Repository

Aerobic and anaerobic movement energetics of hybrid and pure parental abalone

Citation

Alter, K and Morash, AJ and Andrewartha, SJ and Andrew, S and Clark, TD and Elliott, NG and Frappell, PB, Aerobic and anaerobic movement energetics of hybrid and pure parental abalone, Journal of Comparative Physiology B, 191, (6) pp. 1111-1124. ISSN 0174-1578 (2021) [Refereed Article]


Preview
PDF
Pending copyright assessment - Request a copy
1Mb
  

DOI: doi:10.1007/s00360-021-01388-4

Abstract

The underlying mechanisms controlling growth heterosis in marine invertebrates remain poorly understood. We used pure blacklip (Haliotis rubra) and greenlip (Haliotis laevigata) abalone, as well as their hybrid, to test whether differences in movement and/or aerobic versus anaerobic energy use are linked to a purported increased growth rate in hybrids. Abalone were acclimated to control (16C) and typical summer temperatures (23C), each with oxygen treatments of 100% air saturation (O2sat) or 70% O2sat. The experiment then consisted of two phases. During the first phase (chronic exposure), movement and oxygen consumption rates (ṀO2) of abalone were measured during a 2day observation period at stable acclimation conditions. Additionaly, lactate dehydrogenase (LDH) and tauropine dehydrogenase (TDH) activities were measured. During phase two (acute exposure), O2sat was raised to 100% for abalone acclimated to 70% O2sat followed by an acute decrease in oxygen to anoxia for all acclimation groups during which movement and ṀO2 were determined again. During the chronic exposure, hybrids and H. laevigata moved shorter distances than H. rubra. Resting ṀO2, LDH and TDH activities, however, were similar between abalone types but were increased at 23C compared to 16C. During the acute exposure, the initial increase to 100% O2sat for individuals acclimated to 70% O2sat resulted in increased movement compared to individuals acclimated to 100% O2sat for hybrids and H. rubra when compared within type of abalone. Similarly, ṀO2 during spontaneous activity of all three types of abalone previously subjected to 70% O2sat increased above those at 100% O2sat. When oxygen levels had dropped below the critical oxygen level (Pcrit), movement in hybrids and H. laevigata increased up to 6.5-fold compared to movement above Pcrit. Differences in movement and energy use between hybrids and pure species were not marked enough to support the hypothesis that the purportedly higher growth in hybrids is due to an energetic advantage over pure species.

Item Details

Item Type:Refereed Article
Keywords:locomotion, anaerobic enzyme activity, hybrid vigour, gastropod
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal physiology - systems
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - aquaculture
Objective Field:Aquaculture molluscs (excl. oysters)
UTAS Author:Alter, K (Ms Katharina Alter)
UTAS Author:Morash, AJ (Dr Andrea Morash)
UTAS Author:Andrewartha, SJ (Dr Sarah Andrewartha)
UTAS Author:Clark, TD (Dr Timothy Clark)
UTAS Author:Elliott, NG (Dr Nick Elliott)
UTAS Author:Frappell, PB (Professor Peter Frappell)
ID Code:151318
Year Published:2021
Web of Science® Times Cited:2
Deposited By:Ecology and Biodiversity
Deposited On:2022-07-27
Last Modified:2022-07-27
Downloads:0

Repository Staff Only: item control page