The Annual Gametogenesis of the Mussel, Mytilus unguiculatus (coruscus) (Valenciennes, 1858), Occurring in the Shallow Subtidal of Ulleungdo Island in Korea

Report on the Annual Gametogenesis and Tissue Biochemical Composition in the Gray mussel, Crenomytilus grayanus (Dunker 1853) in the Subtidal Rocky Bottom on the East Coast of Korea

“…Yang et al (2021) first reported the annual gametogenesis of the mussel M. coruscus occurring in the shallow subtidal in Ulleungdo Island off the east coast, which is somewhat comparable to the annual reproductive cycle of C. grayanus. According to Yang et al (2021), M. coruscus occurring on a shallow subtidal zone of Ulleungdo Island off the east coast commence their gametogenesis in September when the SST 24 °C and both the male and female spawn in April and May.…”

“…A limited number of studies have reported the annual gametogenesis of the mussels occurring on the coastal rocky intertidal and subtidal of the east coast of Korea, where several mussels species, including C. grayanus, M. galloprovincialis, M. trossulus, and M. coruscus have been reported (Min et al 2004;Lutaenko and Noseworthy 2019). Yang et al (2021) first reported the annual gametogenesis of the mussel M. coruscus occurring in the shallow subtidal in Ulleungdo Island off the east coast, which is somewhat comparable to the annual reproductive cycle of C. grayanus. According to Yang et al (2021), M. coruscus occurring on a shallow subtidal zone of Ulleungdo Island off the east coast commence their gametogenesis in September when the SST 24 °C and both the male and female spawn in April and May.…”

“…Table 2 summarizes the annual gametogenesis pattern of different species of mussels reported from the temperate region, including the Gray mussel investigated in the present study. It is noticeable that M. coruscus distributes on the south and east coast of Korea, as well as in the coastal East China Sea commence the oogenesis in late summer to fall and spawn and they spawn in spring as the SST ranges 10-13 °C (Wi et al 2003;Lee et al 2007;Zhu et al 2018;Yang et al 2021). Sprung (1983) also reported spawning of the blue mussel M. edulis in the North Sea in April and June when the SST ranged from 6 to 14 °C.…”

SNP genotyping revealed a hybrid zone between Mytilus chilensis and M. platensis in southern South America (the Strait of Magellan, Isla Grande de Tierra del Fuego and the Falkland Islands)

“…Nowadays it is widely recognised that three Mytilus taxa are naturally distributed in the southern hemisphere: M. chilensis, M. planulatus and M. platensis (Gardner et al., 2021). The other five are native to the northern hemisphere ( M. californianus , M. edulis , M. galloprovincialis , M. trossulus and M. unguiculatus ) (Gardner et al., 2021; Yang et al., 2021). However, M. galloprovincialis is also widespread around the world, being listed as a highly invasive species in regions such as California, South Africa, China, New Zealand, Australia, Chile, Argentina and Brazil (Braby & Somero, 2006; Branch & Steffani, 2004; Lins et al., 2021; Oyarzún et al., 2016; Pickett & David, 2018; Seo & Lee, 2009; Tarifeño et al., 2012; Zbawicka et al., 2018, 2022).…”

“…Nowadays it is widely recognised that three Mytilus taxa are naturally distributed in the southern hemisphere: M. chilensis, M. planulatus and M. platensis (Gardner et al, 2021). The other five are native to the northern hemisphere (M. californianus, M. edulis, M. galloprovincialis, M. trossulus and M. unguiculatus) (Gardner et al, 2021;Yang et al, 2021). However, M. galloprovincialis is also widespread around the world, being listed as a highly invasive species in regions such as California,…”