A dataset encompassing length-at-age data of early and adult stages of geoduck clam Panopea globosa.

Individual growth is an important demographic component in population dynamics that indicates the contribution of biomass to the population, such as an increase in length and weight over time. In addition, the length-at-age provides information concerning mortality, reproduction rates, survival, and biological factors, which are essential for stock assessment and fishery management. Age and growth studies have focused on estimating average growth trajectories based on length-at-age data from only one developmental stage, assuming a constant growth throughout the life cycle. However, the individuals within a cohort grow at different rates and speeds. This causes uncertainty in the mathematical models fitted to the data, both in the growth parameters and in the mean length-at-age within a cohort. The datasets included in this article were collected from two sources: 1) Fishery-independent data of shell length frequency and age of individuals in early growth stages (0-68 days) obtained under rearing experimental conditions. 2) Fishery-dependent data of shell length-at-age of adult individuals aged 3-47 years collected from commercial landings. The straight-line distance of live specimens was measured between the anterior and posterior margin of the shell. Specimens were then dissected to extract the shells. Age was determined as the number of internal growth lines. The length and age (days) datasets comprised 797 records for larvae and juveniles, and 357 records for adult individuals. These data provide valuable information for researchers, decision makers, the government, and private and academic institutions. The dataset enables comparative analyses and further investigations. Its reuse potential extends to broader topics, such as stock assessment, population dynamics, and fishery management.