Historical deposits of <i>Alexandrium catenella</i> resting cysts in the sediments of Queen Charlotte Sound, New Zealand

MacKenzie, A. Lincoln; Webber, S. M.; Watts, AM; Tonks, Aimee J.

doi:10.1080/00288330.2015.1110187

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…It is likely A. catenella is present in offshore waters of NZ, given the proximity to Tasmania, Australia. As is hypothesised in Australia, persistent ocean stratification driven by climate change, may well lead to the emergence of blooms of this species in NZ [ 25 ], as has been seen with A. pacificum with its spread to the top of the South Island [ 233 ]. The use of molecular methods for species detection and comprehensive monitoring programmes will ensure that such changes are identified promptly.…”

Section: Future Issuesmentioning

confidence: 99%

Effects of Harmful Algal Blooms on Fish and Shellfish Species: A Case Study of New Zealand in a Changing Environment

Rolton

Rhodes

Hutson

et al. 2022

Toxins

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Harmful algal blooms (HABs) have wide-ranging environmental impacts, including on aquatic species of social and commercial importance. In New Zealand (NZ), strategic growth of the aquaculture industry could be adversely affected by the occurrence of HABs. This review examines HAB species which are known to bloom both globally and in NZ and their effects on commercially important shellfish and fish species. Blooms of Karenia spp. have frequently been associated with mortalities of both fish and shellfish in NZ and the sub-lethal effects of other genera, notably Alexandrium spp., on shellfish (which includes paralysis, a lack of byssus production, and reduced growth) are also of concern. Climate change and anthropogenic impacts may alter HAB population structure and dynamics, as well as the physiological responses of fish and shellfish, potentially further compromising aquatic species. Those HAB species which have been detected in NZ and have the potential to bloom and harm marine life in the future are also discussed. The use of environmental DNA (eDNA) and relevant bioassays are practical tools which enable early detection of novel, problem HAB species and rapid toxin/HAB screening, and new data from HAB monitoring of aquaculture production sites using eDNA are presented. As aquaculture grows to supply a sizable proportion of the world’s protein, the effects of HABs in reducing productivity is of increasing significance. Research into the multiple stressor effects of climate change and HABs on cultured species and using local, recent, HAB strains is needed to accurately assess effects and inform stock management strategies.

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Section: Future Issuesmentioning

confidence: 99%