A study of a population of Canarium (Canarium) urceus (Mollusca, Strombidae) from Nha Trang, Vietnam

Stephen J. Maxwell¹, Tasmin L. Rymer¹

¹ College of Science and Engineering, James Cook University, Cairns, QLD 4870, Australia.
² Centre for Tropical Environmental and Sustainability Sciences, James Cook University, Cairns Qld 4870, Australia.

The Molluscan family Strombidae Rafinesque, 1815 is taxonomically diverse, with a widespread global distribution. However, the population structure of many of these taxa remains enigmatic. There is a growing interest in exploring population structures within species across their distributions to understand factors affecting morphological diversity. In particular, there is an inherent focus on sexual-size dimorphism between females and males in both physiology and shell morphometrics, as well as sexual bias (Mutlu 2004; Maxwell et al. 2017, 2020a, 2021), in order to provide a basis from which models of sexual dimorphism in general might be generated. Furthermore, the expression of pseudohermaphroditism in stromboideans, which is linked to the environmental causal agent tributyltin (TBT), a marine pollutant, has also been the focus of recent studies, with varying findings in expression ranging from absent to 36 % within populations (Multu 2004; Maxwell et al. 2020a; Reed 1993a, 1993b; Ruaza 2019). In addition, another population dynamic that has received recent attention is the expression of colour phenotypes within and between populations (Maxwell et al. 2020a, 2021). Despite these recent studies and the development of a general model for sexual dimorphism (Maxwell et al. 2022), many stromboideans still remain unstudied in terms of morphological variability, sex-ratio bias and pseudohermaphroditism, particularly at the population level. (…)

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Cite as: Maxwell S.J. & Rymer T.L. (2022) A study of a population of Canarium (Canarium) urceus (Mollusca, Strombidae) from Nha Trang, Vietnam. Strombus 28(1–2): 1–5.

Publication date: 17 June 2022.