Leading Museums, Museum Leaders

Magnetic Is giant clam bleaching extends

Dr Robyn Cumming & Dr Rick Braley, Update on Magnetic Island’s Giant Clams, The Queensland Museum Network Blog, 20 March 2020

This is the 2nd installment of a blog monitoring a bleaching event currently occurring in reefs off Magnetic Island, 14kms from the coast of Townsville in North Queensland

Unfortunately by 7 March, approximately two weeks since the last inspection, the bleaching of the giant clams along the snorkel trails of Magnetic Island had worsened.

In just a few short weeks, the number of giant clams (Tridacna gigas) on the snorkel trails that were bleached white had increased from two to five.

Partially (N5) and fully (N4) bleached clams at Nelly Bay snorkel trail, 7 March 2020.

A further eight were pale and/or blotched, a less extreme form of bleaching (e.g. N5, N6 & N7).

Partially bleached clams (N6 & N7) at Nelly Bay snorkel trail, 7 March 2020.

Only one of the fourteen giant clams had normal colouration (G2).

Bleached (G1) and unbleached (G2) clams at Geoffrey Bay snorkel trail, 7 March 2020.

Scientist from Queensland Museum and Magnetic Island monitored the clams again on 15 March 2020 and little change had occurred.

More updates will follow from the team monitoring their progress.

Dr Rick Braley measuring giant clams (Tridacna gigas) at Lizard Island, Great Barrier Reef. Giant clams can reach more than a metre in length and weigh more than 100 kg.

Written and Compiled by Dr Robyn Cumming, Collection Manager (marine) and Bryozoan taxonomist, Biodiversity & Geosciences Program, Queensland Museum and Dr Rick Braley, Aquasearch, Magnetic Island.

See also: https://blog.qm.qld.gov.au/2020/03/11/north-queensland-giant-clams-under-stress/

Council of Australasian Museum Directors, c/o Ms Daryl Karp, Museum of Australian Democracy at Old Parliament House PO Box 3934 Manuka, Australian Capital Territory 2603 Australia, © CAMD 2020
Disclaimer: The content of this website is provided for information purposes only and is not intended as a substitute for professional advice. No claim is made as to the accuracy or authenticity of the content of the website. The Council of Australasian Museum Directors does not accept any liability to any person for the information or advice (or the use of such information or advice) which is provided on this website. The information on our website is provided on the basis that all persons accessing the site undertake responsibility for assessing the relevance and accuracy of its content. No responsibility is taken for any information or services which may appear on any linked web sites. Hostgator.
.