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Cardiorespiratory ontogeny and response to environmental hypoxia of larval spiny lobster, Sagmariasus verreauxi
Citation
Fitzgibbon, QP and Ruff, N and Battaglene, SC, Cardiorespiratory ontogeny and response to environmental hypoxia of larval spiny lobster, Sagmariasus verreauxi, Comparative Biochemistry and Physiology, Part A, 184 pp. 76-82. ISSN 1095-6433 (2015) [Refereed Article]
Copyright Statement
Copyright 2015 Elsevier Inc. All rights reserved
DOI: doi:10.1016/j.cbpa.2015.02.007
Abstract
Cardiorespiratory function is vital to an organism's ability to respond to environmental stress and analysis of cardiorespiratory
capacity of species or life stages can elucidate vulnerability to climate change. Spiny lobsters have
one of the most complex pelagic larval life cycles of any invertebrate and recently there has been an unexplained
decline in post-larval recruitment for a number of species. We conducted the first analysis of the larval ontogeny
of oxygen consumption, heart rate, maxilla 2 ventilation rate and oxyregulatory capacity of the spiny lobster,
Sagmariasus verreauxi, to gain insight into their vulnerability to ocean change and to investigate life stage specific
sensitivity to temperature-dependent oxygen limitation. In normoxia, heart and maxilla 2 ventilation rates increased
in early larval development before declining,which we hypothesise is related to the transition from myogenic
to neurogenic cardiac control. Maxilla 2 ventilation rate was sensitive to hypoxia at all larval stages, while
heart rate was only sensitive to hypoxia in the late phyllosoma stages. Oxygen consumption conformed to environmental
hypoxia at all larval stages. Spiny lobster larvae have limited respiratory control due to immature gas
exchange physiology, compounded by their exceptionally large size. The lack of oxyregulatory ability suggests
that all development stages are vulnerable to changes in sea temperature and oxygen availability. The synergetic
stressors of increased temperature and reduced dissolved oxygen in the marine environmentwill diminish spiny
lobster larval performance, increasing the challenge to achieve their extended larval life cycle, which may
contribute to declines in post-larval recruitment.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | lobster, physiology |
| Research Division: | Agricultural and Veterinary Sciences |
| Research Group: | Fisheries Sciences |
| Research Field: | Aquaculture |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - Aquaculture |
| Objective Field: | Fisheries - Aquaculture not elsewhere classified |
| Author: | Fitzgibbon, QP (Dr Quinn Fitzgibbon) |
| Author: | Ruff, N (Dr Nicole Ruff) |
| Author: | Battaglene, SC (Associate Professor Stephen Battaglene) |
| ID Code: | 98643 |
| Year Published: | 2015 |
| Funding Support: | Australian Research Council (IH120100032) |
| Deposited By: | Sustainable Marine Research Collaboration |
| Deposited On: | 2015-02-23 |
| Last Modified: | 2016-05-02 |
| Downloads: | 0 |
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