Pubblicazione scientifica

Large-scale climatic effects on traditional Hawaiian fishpond aquaculture

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e raccolta
trasformazione e commercializzazione

RIASSUNTO

Aquaculture accounts for almost one-half of global fish consumption. Understanding the regional impact of climate fluctuations on aquaculture production thus is critical for the sustainability of this crucial food resource. The objective of this work was to understand the role of climate fluctuations and climate change in subtropical coastal estuarine environments within the context of aquaculture practices in Heʻeia Fishpond, Oʻahu Island, Hawaiʻi. To the best of our knowledge, this was the first study of climate effects on traditional aquaculture systems in the Hawaiian Islands. Data from adjacent weather stations were analyzed together with in situ water quality instrument deployments spanning a 12-year period (November 2004 –November 2016). We found correlations between two periods with extremely high fish mortality at Heʻeia Fishpond (May and October 2009) and slackening trade winds in the week preceding each mortality event, as well as surface water temperatures elevated 2–3°C higher than the background periods (March-December 2009). We posit that the lack of trade wind-driven surface water mixing enhanced surface heating and stratification of the water column, leading to hypoxic conditions and stress on fish populations, which had limited ability to move within net pen enclosures. Elevated water temperature and interruption of trade winds previously have been linked to the onset of El Niño in Hawaiʻi. Our results provide empirical evidence regarding El Niño effects on the coastal ocean, which can inform resource management efforts about potential impact of climate variation on aquaculture production. Finally, we provide recommendations for reducing the impact of warming events on fishponds, as these events are predicted to increase in magnitude and frequency as a consequence of global warming.

DATA

Data di pubblicazione: 16/11/2017

AUTORI

MCCOY DANIEL
MCMANUS MARGARET A
KOTUBETEY KELIʻIAHONUI
KAWELO ANGELA HIʻILEI
YOUNG CHARLES
D’ANDREA BRANDON
RUTTENBERG KATHLEEN C
ALEGADO ROSANNA ʻANOLANI

ENTE DI AFFERENZA

Department of Oceanography University of Hawaiʻi Mānoa Honolulu Hawaiʻi United States of America
Paepae o Heʻeia Kāneʻohe Hawaiʻi United States of America
Department of Geology and Geophysics University of Hawaiʻi Mānoa Honolulu Hawaiʻi United States of America
Sea Grant College Program University of Hawaiʻi Mānoa Honolulu Hawaiʻi United States of America
CTR INVESTIGACION CIENTIFICA Y DE EDUCACION SUPERIOR DE ENSENADA DIVISION DE FISICA APLICADA MEXICO

RIVISTA

PLoS ONE, 12(11), e0187951

IMPACT FACTOR

2,870

indietro