Effect of salinity on embryo-larval development of yellow clam Mesodesma mactroides (Reeve, 1854) in laboratory

Abstract

This study assessed the effect of salinity on embryonic development, larval growth and survival of the yellow clam Mesodesma mactroides in laboratory. Embryos and larvae of M. mactroides were submitted and maintained at four different salinities: 20, 25, 30 and 35 ppt, to determine optimal conditions for the species. Through descriptive analysis, the results showed that the embryos tolerate salinities between 25 -35 ppt, presenting fast metamorphoses at salinities 30 and 35 ppt, during experimental period of 27 hours. The same tolerance pattern was observed in larval stage (25 -35 ppt), showing a better development in salinity of 35 ppt. This result is verifi ed in biometric analyzes of height and length of the shells and survival rate, with higher averages in treatments with salinity 35 ppt. The experimental period of this stage lasted 27 days, when the larvae were able to settle. These results indicate that embryos and larvae of M. mactroides tolerate salinities between (25-35 ppt), with the best growth and survival on high salinities being recommended to better yields in laboratory.

Replacement of living microalgae with a dried alfalfa chloroplast product in diets for the Brown mussel (Perna perna), Yellow clam (Mesodesma mactroides) and Manila clam (Venerupis philippinarum)

“…Juveniles of M . mactroides were produced in the Laboratory of Marine Mollusks (LMM) of the Federal University of Santa Catarina, following the method of Santos, Bernardes, Ramirez, Gomes, et al (2020). The initial mean shell heights of the juvenile P .…”

“…Among new potential species for mollusc culture, the clam Mesodesma mactroides (Reeve, 1854; syn. Amarilladesma mactroides ), commonly called the Yellow clam, has received recent attention (Proverbio, 2017; Santos et al, 2020; Santos, Bernardes, Ramirez, Ramos, et al, 2020). Mesodesma mactroides is important in Brazil, Uruguay and Argentina as a historical recreational fishery with associated socio‐economic value (Brazeiro & Defeo, 1999; Defeo et al, 1992; Herrmann et al, 2011; Ihering, 1897; Shoeman et al, 2013).…”

“…Mesodesma mactroides is important in Brazil, Uruguay and Argentina as a historical recreational fishery with associated socio‐economic value (Brazeiro & Defeo, 1999; Defeo et al, 1992; Herrmann et al, 2011; Ihering, 1897; Shoeman et al, 2013). Preliminary studies on the potential aquaculture value of this species have shown promising results (Santos, Bernardes, Ramirez, Gomes, et al, 2020; Santos, Bernardes, Ramirez, Ramos, et al, 2020).…”

Effect of temperature on embryo‐larval development ofAmarilladesma mactroides(Reeve, 1854)

“…The species has been the subject of research for decades regarding its habitat (Coscarón, 1959), reproductive cycles in its natural environment (Herrmann et al, 2009), population dynamics (Bergonci & Thomé, 2008) and the reduction in natural stocks and outbreaks of mortalities that affect the species in areas of its distribution (Carvalho et al, 2013; Carvalho et al, 2013; Ortega et al, 2012; Santos et al, 2016). However, reproductive studies have only recently been carried out, reporting and describing processes that involve broodstock conditioning, spawning techniques and embryonic and complete larval development under different laboratory conditions (Santos, Bernardes, Ramírez, Ramos, et al, 2020; Santos, Bernardes, Ramírez, Gomes, et al, 2020), with the initial aim of contributing information for the cultivation of this species.…”

Presence of amyloid protein in the yellow clam Amarilladesma mactroides (Reeve, 1854), an emerging species for aquaculture

“…Mesodesma mactroides) is a native surf clam from southernmost Brazil, Uruguay and Argentina. This species has recently been the subject of studies (Santos et al 2016;Carvalho et al 2016;Santos et al 2020a;Santos et al 2020b) and stands out for its historical value as a significant fishing resource on the mentioned countries (Coscarón 1959).…”