Introduced and native Phlebobranch and Stolidobranch solitary ascidians (Tunicata: Ascidiacea) around Salvador, Bahia, Brazil

Rocha, Rosana M.; Bonnet, Nadia Y K; Baptista, Mariah S.; Beltramin, F. S.

doi:10.1590/s1984-46702012000100005

Cited by 21 publications

(14 citation statements)

References 29 publications

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“…Styela plicata is a cosmopolitan species, abundant in harbors of the Atlantic coastline. Juveniles grow rapidly and can attain its maximum size of 8 cm in 6 months [35, 36]. In Brazil, this species is found along the southeastern coastline, including the harbors of Rio de Janeiro, São Sebastião, and Santos [35].…”

Section: Methodsmentioning

confidence: 99%

Putative stem cells in the hemolymph and in the intestinal submucosa of the solitary ascidian Styela plicata

Jiménez-Merino¹,

Abreu²,

Hiebert³

et al. 2019

EvoDevo

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BackgroundIn various ascidian species, circulating stem cells have been documented to be involved in asexual reproduction and whole-body regeneration. Studies of these cell population(s) are mainly restricted to colonial species. Here, we investigate the occurrence of circulating stem cells in the solitary Styela plicata, a member of the Styelidae, a family with at least two independent origins of coloniality.ResultsUsing flow cytometry, we characterized a population of circulating putative stem cells (CPSCs) in S. plicata and determined two gates likely enriched with CPSCs based on morphology and aldehyde dehydrogenase (ALDH) activity. We found an ALDH + cell population with low granularity, suggesting a stem-like state. In an attempt to uncover putative CPSCs niches in S. plicata, we performed a histological survey for hemoblast-like cells, followed by immunohistochemistry with stem cell and proliferation markers. The intestinal submucosa (IS) showed high cellular proliferation levels and high frequency of undifferentiated cells and histological and ultrastructural analyses revealed the presence of hemoblast aggregations in the IS suggesting a possible niche. Finally, we document the first ontogenetic appearance of distinct metamorphic circulatory mesenchyme cells, which precedes the emergence of juvenile hemocytes.ConclusionsWe find CPSCs in the hemolymph of the solitary ascidian Styela plicata, presumably involved in the regenerative capacity of this species. The presence of proliferating and undifferentiated mesenchymal cells suggests IS as a possible niche.

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Section: Methodsmentioning

confidence: 99%

Putative stem cells in the hemolymph and in the intestinal submucosa of the solitary ascidian Styela plicata

Jiménez-Merino¹,

Abreu²,

Hiebert³

et al. 2019

EvoDevo

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“…Out of 33 ascidian species with introduction records in the Mediterranean (Coll et al, 2010), 7 alien ascidians have been reported from the coast of Israel (Shenkar and Loya, 2009), and only few studies have focused on their reproductive biology (Shenkar and Loya, 2008). The solitary ascidian Microcosmus exasperatus Heller 1878 (order: Stolidobranchia, family: Pyuridae, Figure 1A) has a wide global distribution and it very common in tropical and sub-tropical waters (VanName, 1945;Tokioka, 1967;Millar, 1977;Monniot, 1983Monniot, , 2002Goodbody, 1984;Kott, 1985;Rocha et al, 2012). Its presence has been reported since the 1960s in different FIGURE 1 | (A) Microcosmus exasperatus.…”

Section: Introductionmentioning

confidence: 99%

From Tropical to Sub-Tropical: Prolonged Reproductive Activity of the Invasive Ascidian Microcosmus exasperatus in the Eastern Mediterranean

Nagar

Shenkar

2016

Front. Ecol. Evol.

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The solitary ascidian Microcosmus exasperatus is globally distributed in tropical and sub-tropical waters. In the Mediterranean it is considered an invasive species introduced through the Suez Canal, with a restricted distribution in the eastern basin. In order to understand the potential of this species to establish sustainable communities at additional sites in the Mediterranean, we studied its reproduction cycle over a 2-year period in relation to seawater temperature and chlorophyll-a data. Although M. exasperatus reproduces seasonally, with significantly greater activity in summer and early fall, mature oocytes occur throughout the year, suggesting multiple spawning periods. We found that reproductive effort significantly correlated with seawater temperature, while chlorophyll-a showed a low and insignificant explanatory power. A combined regression model of both parameters yielded the highest explained variance, suggesting a synergic effect of these two factors. Such a prolonged reproductive activity period enables repeated recruitment events. In view of the anticipated rise in seawater temperature, we predict that this species will gradually expand its distribution further across the Mediterranean.

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“…United States (Van Name 1921, 1945), Bermudas (Berrill 1932; Monniot 1972), Jamaica (Heller 1878; Goodbody 2003), Belize (Goodbody 2000), Panamá (Collin et al 2005; Carman et al 2011), Curaçao (Van Name 1924; Millar 1962; Goodbody 1984), Venezuela (Rocha et al 2010; Carballo-Pérez and Díaz 2011), Tobago (Cole 2012), Martinique (Gravier 1955; Monniot 2018c), Antilles (Sluiter 1898; Van Name 1921, 1931), Guadeloupe (Monniot 1983), Brazil (Rodrigues 1962; Rodrigues et al 1998; Monniot and Monniot 2001; Rocha et al 2012; Rocha and Costa 2005; Rocha and Kremer 2005; Rocha et al 2005), Azores (Harant 1929), Cape Verde (Harant 1929), Mediterranean sea (Streftaris et al 2005; Turon et al 2007), Red Sea (Shenkar 2012), Philippine Sea (Van Name 1918), Mindoro (Tokioka 1970), Truuk Islands (Nishikawa 1984), Guam (Lambert 2003), Australia (Kott 1985; Monniot 1992).…”

Section: Resultsmentioning

confidence: 99%

Checklist of ascidians (Chordata, Tunicata) from the southern Gulf of Mexico

Palomino-Alvarez

Rocha

Simões

2019

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This study is the first inventory of ascidians from shallow waters (0–25 m) of coastal and reef habitats in the southern Gulf of Mexico where ascidian diversity is poorly known. Sampled environments in 14 locations (38 sites) with 134 samples collected from 2015 to 2017 included coral reefs, coastal lagoons, mangroves, seagrass, ports, and artificial platforms. The 31 identified species comprise 19 genera and 13 families. Ten species are newly reported in the Gulf of Mexico:AscidiapanamensisBonnet & Rocha, 2011;Ecteinascidiastyeloides(Traustedt, 1882);CystodytesroseolusHartmeyer, 1912; Eudistomaaff.amanitum Paiva & Rocha, 2018;EudistomarecifenseMillar, 1977;EuherdmaniafasciculataMonniot, 1983; Euherdmaniaaff.vitrea Millar, 1961;Polycarpacartilaginea(Sluiter, 1885);Botrylloidesmagnicoecum(Hartmeyer, 1912) andDidemnumgranulatumTokioka, 1954. Two new species will be described separately (Clavelinasp. andPyurasp.). This study provides the first records for 26 species ascidians for the region as well as describes increased distributions of ten Atlantic species. Thus, our data provide a starting point for future ecological, experimental and taxonomic studies of ascidians of the Gulf of Mexico.

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Introduced and native Phlebobranch and Stolidobranch solitary ascidians (Tunicata: Ascidiacea) around Salvador, Bahia, Brazil

Cited by 21 publications

References 29 publications

Putative stem cells in the hemolymph and in the intestinal submucosa of the solitary ascidian Styela plicata

Putative stem cells in the hemolymph and in the intestinal submucosa of the solitary ascidian Styela plicata

From Tropical to Sub-Tropical: Prolonged Reproductive Activity of the Invasive Ascidian Microcosmus exasperatus in the Eastern Mediterranean

Checklist of ascidians (Chordata, Tunicata) from the southern Gulf of Mexico

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