Allometric growth of a common Nassariidae (Gastropoda) in south-east Brazil

Abstract

The allometric growth of two groups of Nassarius vibex on beds of the bivalve Mytella charruana on the northern coast of the State of São Paulo, was evaluated between September 2006 and February 2007 in the bed on Camaroeiro Beach, and from March 2007 to June 2007 at Cidade Beach. The shells from Camaroeiro were longer and wider and had a smaller shell aperture than those from Cidade; a principal components analysis also confirmed different morphometric patterns between the areas. The allometric growth of the two groups showed great variation in the development of individuals. The increase of shell width and height in relation to shell length did not differ between the two areas. Shell aperture showed a contrasting growth pattern, with individuals from Camaroeiro having smaller apertures. The methodology based on Kullback–Leibler information theory and the multi-model inference showed, for N. vibex, that the classic linear allometric growth was not the most suitable explanation for the observed morphometric relationships. The patterns of relative growth observed in the two groups of N. vibex may be a consequence of different growth and variation rates, which modifies the development of the individuals. Other factors such as food resource availability and environmental parameters, which might also differ between the two areas, should also be considered.

Shell shape variation in the Nassariid Buccinanops globulosus in northern Patagonia

“…The size-related variation in shape observed, although small, means that growth in size is accompanied by changes in shell shape. This is the first report for the genus Buccinanops about the presence of an allometric growth pattern and the second in a nassariid species (Yokoyama and Amaral 2011). Allometric changes are usually related to the need of maintaining the functionality of the organisms not only for biomechanical reasons but also for facing the different ecological demands that vary over the individual lifespan (Zelditch et al 2004).…”

MORPHOMETRIC CHARACTER AND MORPHOLOGY OF ABALONE Haliotis squamata REEVE 1864 IN COASTAL SOUTHERN JAVA AND BALI

“…McShane et al (1994) reported that variations in the length shells of H. iris were influenced by habitats that were unprotected and protected by waves. Yokoyama and Amaral (2010) also reported that morphometric variations between populations could be influenced by several factors such as differences in shell size and age differences. The availability of food resources and environmental parameters play an important role in the growth rate of gastropods (Yokoyama and Amaral, 2010).…”

“…Yokoyama and Amaral (2010) also reported that morphometric variations between populations could be influenced by several factors such as differences in shell size and age differences. The availability of food resources and environmental parameters play an important role in the growth rate of gastropods (Yokoyama and Amaral, 2010). Burhanis et al (2018) reported that the topography of the waters had an effect on the distribution of the size of the type of yellowfin tuna in the waters of Simeulue.…”

Population dynamics of the harvested clam Anomalocardia brasiliana (Bivalvia: Veneridae) in Cidade Beach, south-east Brazil

“…m −2 ) than A. brasiliana in Caraguatatuba Bay. Moreover, throughout the study period, there were two beds of the filter-feeding mussel Mytella charruana a few metres away from the sampling sector (Yokoyama & Amaral, 2011). These mussel beds were about 24 m long × 15 m wide (Yokoyama & Amaral, 2011) and formed by approximately 2000 living and dead mussels per metre squared (Amaral pers.…”