Study

Can giant clam (Tridacna squamosa) populations be restored on Singapore's heavily impacted coral reefs?

  • Published source details Guest J.R., Todd P.A., Goh E., Sivalonganathan B.S. & Reddy K.P. (2008) Can giant clam (Tridacna squamosa) populations be restored on Singapore's heavily impacted coral reefs? Aquatic Conservation: Marine and Freshwater Ecosystems, 18, 570-579

Actions

This study is summarised as evidence for the following.

Action Category

Transplant/release captive-bred or hatchery-reared species - Transplant/release molluscs

Action Link
Subtidal Benthic Invertebrate Conservation
  1. Transplant/release captive-bred or hatchery-reared species - Transplant/release molluscs

    A replicated study in 2004 at four coral reef sites in the Singapore Strait (Guest et al. 2008) found that after being transplanted in the field aquarium-reared giant clams Tridacna squamosa had a high survival rate and grew over seven months. Of the 144 clams transplanted, 116 were recovered (80.6%), but survival rates differed amongst transplant sites (24–34 out of 36 transplanted clams per site). All recovered clams had increased in weight, shell length and shell height over the seven-month transplant, but rates differed amongst transplant sites (3.3–4.8 mm/month). In April 2004, a total of 144 aquarium-reared clams (eighteen-month old) were equally divided into 24 groups (6 clams/group) and transplanted into four sites (6 groups/site). Clams were released 50 cm above the seabed. Prior to transplant and after seven months, all clams were weighted, and their shell lengths and heights measured.

    (Summarised by: Anaëlle Lemasson & Laura Pettit)

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust