Patrones de diversidad y estructura genética en especies antárticas y subantárticas de Nacella (Nacellidae)

Distribution and abundance patterns of echinoderms in the fjord and channel complex from a subantarctic north Patagonian Ice field, Magellan region

“…The authors hypothesized that the Antarctic Intermediate Water (AAIW), which stretches along the Chilean continental margin in 400 to 1200 m deep, transports these species to the northern latitudes. The widespread distribution patterns of many echinoderms in waters at the southern tip of South America agrees with the results of other specific studies such as those of Lancellotti & Vásquez (1999), Larraín, Mutschke, Riveros, & Solar, (1999), Penchaszadeh, Bigatti, & Miloslavich (2004), Ríos, Mutschke, Montiel, Gerdes, & Arntz, (2005), López-Gappa & Sueiro (2007, González-Wevar et al (2016), probably mirroring abilities of these invertebrates to cope with the environmental heterogeneity in this hydrographic and ecological complex fjord and channel system. Examples of these echinoderms are G. chilensis and A. agassizii, species that inhabit the Atlantic and Pacific coastlines of South America as well as in Antarctic waters (Hunter & Halanych, 2008).…”

Diversity of benthic marine mollusks of the Strait of Magellan, Chile (Polyplacophora, Gastropoda, Bivalvia): a historical review of natural history

“… References: a ( Aldea and Rosenfeld 2011 ); b ( Aldea et al 2011 ); c ( Allmon 1990 ); d ( Andrade and Brey 2014 ); e ( Andrade et al 2016 ); f ( Arntz and Gorny 1996 ); g ( Astorga et al 2007 ); h ( Brattström and Johanssen 1983 ); i ( Cañete et al 2014 ); j ( Cárdenas 2008 ); k ( Castellanos and Landoni 1988 ); l ( Castellanos and Landoni 1989 ); m ( Castellanos and Landoni 1990 ); n ( Castellanos et al 1993 ); o ( Castellanos 1970 ); p ( Castellanos 1988 ); q ( Castellanos 1992a ); r ( Castellanos 1992b ); s ( Cunningham 1871 ); t ( Dell 1964 ); u ( Dell 1971 ); v ( Dell 1990 ); w ( d’Orbigny 1835–1846 ); x ( González-Wevar et al 2010 ); y ( González-Wevar et al 2016a ); z ( González-Wevar et al 2016b ); aa ( González-Wevar et al 2017 a); ab ( Guarda 2015 ); ac ( Güller and Zelaya 2011 ); ad ( Güller and Zelaya 2016a ); ae ( Güller and Zelaya 2016b ); af ( Güller and Zelaya 2017 ); ag ( Güller and Zelaya 2013 ); ah ( Guzmán and Ríos 1987 ); ai ( Guzmán 1978 ); aj ( Holmes et al 2005 ); ak ( Hombron and Jacquinot 1854 ); al ( King and Broderip 1832 ); am ( Leloup 1956 ); an ( Mancilla 2010 ); ...…”

“…Between the year 2000 and the present there have been several studies that have provided more information about the diversity of mollusks in the Strait of Magellan (e.g., Ríos et al 2003;Ríos et al 2005;Ríos et al 2007;Thatje and Brown 2009;Rosenfeld et al 2013;Rosenfeld et al 2015), presenting new records of species. Several taxonomic revisions of specific groups have been published in recent years, where erroneous records, changes in nomenclature, synonymized species and descriptions of new species have been made (e.g., Sirenko 2006a;Zelaya and Geiger 2007;Aranzamendi et al 2009;Zelaya 2009;González-Wevar et al 2011;Güller et al 2016;Pastorino 2016;Güller and Zelaya 2017;Korshunova et al 2017). In order to have a comprehensive list of species in the most important channel of the Magellanic Province it is necessary to provide an updated list of records of the malacofauna of the Strait of Magellan.…”

A first look at the genetic diversity of Enteroctopus megalocyathus (Cephalopoda: Enteroctopodidae) captured by the king crab fishery in the south of Chile

“…an adult benthic lifestyle and an early planktonic stage; see below) show low levels of genetic diversity (de Aranzamendi et al ., 2011, 2014) (see Supplementary material, Table S5). These levels have been associated with a demographic expansion that occurred after the last glaciation, and to the major ocean currents that favour larval dispersal (de Aranzamendi et al ., 2011, 2014; González-Wevar et al ., 2016 a , 2016 b ; Pardo-Gandarillas et al ., 2018). These historical and ecological traits might also be responsible for the observed low genetic diversity of E. megalocyathus .…”

“…The population genetic pattern of E. dofleini observed in Alaska may be mirrored in E. megalocyathus as both species share several characteristics; both species are merobenthic, have a similar paralarval period and similar paralarva size at hatching (Uriarte & Farías, 2014). Nevertheless, studies about the genetic structure of other molluscs, fish and crustaceans in the Magellanic province have shown low genetic diversity and/or no genetic structure (molluscs, de Aranzamendi et al ., 2011, 2014; fishes, Ceballos et al ., 2012; crabs, Barrera-García, 2016; González-Wevar et al ., 2016a, 2016 b ). A lack of genetic structure in these groups is attributed to two types of factors: (1) historical, such as events that happened during the last glacial period (sea level regression, decrease in marine water temperature, ice sheet scouring and ice sheet calving); and (2) biological, such as larval dispersal, which is driven by currents.…”