G. childressi shell length and shell thickness growth after 21 months in culture, as deduced from calcein staining marks using a Leica M165 FC stereo microscope.
Gigantidas childressi (cultured from July 2014 to August 2016) were sampled after 23 months of culture. The conditions index was calculated as the ratio of ash-free dry weight (g) and mussel shell volume (mL).
Gigantidas childressi from three different nutritional treatments (cultured from August 2017 to November 2019) were sampled after 27 months of culture. The conditions index was calculated as the ratio of ash-free dry weight (g) and mussel shell volume (mL).
Mortality/survival of animals in nutrition treatments 'm' (methane), 'a+m' (algae and methane) and 'a' (algae), that were not sacrificed for other analyses (initial animal numbers: 9-10).