I somehow had missed this paper. I am making a topic so I don't forget it! I see this question sometimes, so it might be useful if anyone searches.
Can giant clam (Tridacna squamosa) populations be restored on Singapore's heavily impacted coral reefs? - Guest - 2007 - Aquatic Conservation: Marine and Freshwater Ecosystems - Wiley Online Library
I think this is a pay to read, but I have access through work. Here are the highlights:
Clam growth experiment
An aquarium experiment was conducted to quantify clam growth under three light treatments: 50%
ambient (800 mmol s1m2) photosynthetically active radiation (PAR); 25% ambient PAR
(400 mmol s1m2); and 12% ambient PAR (180 mmol s1m2). Mean values from readings were
obtained on a clear sunny day with a Li-Cor Biosciences light meter. These conditions were achieved using
commercial nursery netting; tanks were supplied with flow-through filtered seawater and lightly aerated.
The T. squamosa used in this experiment and the subsequent field transplantation study were obtained from
the giant clam mariculture programme at the Bolinao Marine Laboratory of the Marine Science Institute,
University of the Philippines. The clams were quarantined prior to shipment (to reduce the possibility of
alien species introductions) before being transferred to the Tropical Marine Science Institute (TMSI) on
St John’s Island, Singapore. The clams were approximately 8 months old when the aquarium experiments
began in July 2003. In each treatment 30 clams (mean shell length among treatments ¼ 30:51 mm) were
maintained for 10 weeks. Maximum shell lengths (Vernier calipers, 0.01 mm) and wet weight (digital
scales, 0.01 g) were measured at the beginning and end of the experiment.
Clam growth was significantly different among the three light treatment tanks (df1 ¼ 4; df2 ¼ 171; Wilks’
lambda ¼ 0:62; Rao’s R ¼ 11:65; P50.001) and between all pairwise combinations (Tukey tests, P50.05),
with both length and wet weight of those maintained under 50% ambient PAR increasing over twice as
much as those experiencing just12%ambient PAR (Figure 2). Nevertheless, the clams maintained at12%
ambient PAR still grew an average of 3mmmonth1 during the 10 week period. The mean growth rate for
50% ambient PAR was 7.4mmmonth1 (SD ¼ 2:4mm), for 25% ambient PAR it was 5.9mmmonth1
(SD ¼ 2:6 mm) and for 12% ambient PAR it was 3.0mmmonth1 (SD ¼ 2:3mm). All clams survived and
no bleaching or other signs of stress were observed in clams subjected to any of the three treatments.
Can giant clam (Tridacna squamosa) populations be restored on Singapore's heavily impacted coral reefs? - Guest - 2007 - Aquatic Conservation: Marine and Freshwater Ecosystems - Wiley Online Library
I think this is a pay to read, but I have access through work. Here are the highlights:
Clam growth experiment
An aquarium experiment was conducted to quantify clam growth under three light treatments: 50%
ambient (800 mmol s1m2) photosynthetically active radiation (PAR); 25% ambient PAR
(400 mmol s1m2); and 12% ambient PAR (180 mmol s1m2). Mean values from readings were
obtained on a clear sunny day with a Li-Cor Biosciences light meter. These conditions were achieved using
commercial nursery netting; tanks were supplied with flow-through filtered seawater and lightly aerated.
The T. squamosa used in this experiment and the subsequent field transplantation study were obtained from
the giant clam mariculture programme at the Bolinao Marine Laboratory of the Marine Science Institute,
University of the Philippines. The clams were quarantined prior to shipment (to reduce the possibility of
alien species introductions) before being transferred to the Tropical Marine Science Institute (TMSI) on
St John’s Island, Singapore. The clams were approximately 8 months old when the aquarium experiments
began in July 2003. In each treatment 30 clams (mean shell length among treatments ¼ 30:51 mm) were
maintained for 10 weeks. Maximum shell lengths (Vernier calipers, 0.01 mm) and wet weight (digital
scales, 0.01 g) were measured at the beginning and end of the experiment.
Clam growth was significantly different among the three light treatment tanks (df1 ¼ 4; df2 ¼ 171; Wilks’
lambda ¼ 0:62; Rao’s R ¼ 11:65; P50.001) and between all pairwise combinations (Tukey tests, P50.05),
with both length and wet weight of those maintained under 50% ambient PAR increasing over twice as
much as those experiencing just12%ambient PAR (Figure 2). Nevertheless, the clams maintained at12%
ambient PAR still grew an average of 3mmmonth1 during the 10 week period. The mean growth rate for
50% ambient PAR was 7.4mmmonth1 (SD ¼ 2:4mm), for 25% ambient PAR it was 5.9mmmonth1
(SD ¼ 2:6 mm) and for 12% ambient PAR it was 3.0mmmonth1 (SD ¼ 2:3mm). All clams survived and
no bleaching or other signs of stress were observed in clams subjected to any of the three treatments.
