Ascidians (Urochordata: Ascidiacea) from Arraial do Cabo, Rio de Janeiro, Brazil

Rocha, Rosana M.; Costa, Luciana V. G.

doi:10.1590/s0073-47212005000100009

Cited by 20 publications

(20 citation statements)

References 18 publications

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“…It formed ball-shaped colonies filled with a gelatinous tunic, with the zooids located only around the outer edge (Goodbody, 2003) (Figure 4a-d). It had similar characteristics as reported by Rocha and Costa (2005). The studied colonies of P. constellatum were encrusting and on the colony surface, they had dark green with white or beige stellate systems (Figure 4d).…”

Section: Taxonomic Remarkssupporting

confidence: 81%

“…Its abdomen was more or less 90° position in relation to the thorax. The post-abdomen was sac-like and the ovary of this species surrounded by male follicles (Rocha & Costa, 2005) (Figure 4e-i).…”

Section: Taxonomic Remarksmentioning

confidence: 90%

“…The circumtropical ascidian S. brakenhielmi is globally distributed in the Atlantic (Van Name, 1921;Monniot, 1983, Goodbody, 2003, Rocha et al 2005, Indian (Millar, 1954;Monniot & Monniot, 1997) and Pacific Oceans (Monniot & Monniot, 2001;Lambert 2003). It occurs in the Red Sea and the Suez Canal (Michaelsen, 1918) and according to Abdel Messeih (1994) it can be a Lessepsian migrant.…”

Section: Discussionmentioning

confidence: 99%

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Önen¹

2018

Turk. J. Fish. Aquat. Sci.

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The current study attempts to investigate the distribution of ascidian species collected from eight stations located along the eastern coasts of Aegean Sea, Turkey. For this purpose, field studies were conducted in July 2016. This study revealed the occurrence of ascidian species belonging to 7 families and 12 genera. The invasive species Polyclinum constellatum Savigny, 1816 is reported for the first time from Turkish waters and for the second time in the Mediterranean Sea. Furthermore, Symplegma brakenhielmi (Michaelsen, 1904) is found as a new record for the Turkish Aegean Sea fauna. Knowledge about the ascidian diversity of the Turkish Seas is still incomplete and large-scale surveys, additional taxonomic and molecular studies are needed.

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Section: Taxonomic Remarkssupporting

confidence: 81%

Section: Taxonomic Remarksmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

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Önen¹

2018

Turk. J. Fish. Aquat. Sci.

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“…This introduced species is also usually found on artificial substrates (ROCHA & KREMER 2005), but also may be found on natural substrates, as in Paranaguá Bay, in the state of Paraná (ROCHA & KREMER 2005) and at Arraial do Cabo, Rio de Janeiro (ROCHA & COSTA 2005). Here we report its first record for Angra dos Reis.…”

Section: Styelidae 1 X Xmentioning

confidence: 96%

“…Ascidia sydneiensis was first recorded in Brazil in the state of São Paulo (BJORNBERG 1956) and its distribution is restricted to the southern and southeastern coast (MILLAR 1958, RODRIGUES 1962, ROCHA & NASSER 1998, ROCHA & KREMER 2005, ROCHA & COSTA 2005. This introduced species is also usually found on artificial substrates (ROCHA & KREMER 2005), but also may be found on natural substrates, as in Paranaguá Bay, in the state of Paraná (ROCHA & KREMER 2005) and at Arraial do Cabo, Rio de Janeiro (ROCHA & COSTA 2005).…”

Section: Styelidae 1 X Xmentioning

confidence: 99%

Non indigenous ascidians in port and natural environments in a tropical Brazilian bay

Marins¹,

Novaes²,

Rocha³

et al. 2010

Zoologia (Curitiba, Impr.)

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Despite limited natural dispersal, some species of ascidians can be transported vast distances via oceanic petroleum platforms, ship hulls and ballast water and therefore may be good indicators of bioinvasion. Usually non indigenous species (NIS) are abundant in harbors. This is caused in part because of the higher propagule delivery rate in these areas. An alternative explanation of why invasion is enhanced in harbor and marinas is that environmental degradation commonly found in these habitats favors the establishment of NIS. Most surveys for introduced species were not comprehensive and targeted mainly ports and marinas. Angra dos Reis is an excellent system that provides an opportunity to compare the potential distribution of introduced and native species of Ascidiacea between port and natural environments. Here, we compared the colonization of experimental subtidal plates placed in harbors and marinas with the colonization of plates placed in nearby natural areas. With 27 taxa (15 identified to species), species richness was greater in port environments (25 versus 8). Six taxa were common to both environments while 19 taxa were exclusively found in ports. Among the identified species in ports, three were introduced, five were cryptogenic and only one was native. Only three species were found exclusively in the natural sites and all were cryptogenic. The presence of introduced species only in the port areas of Angra dos Reis reinforces the need for continued, periodic monitoring in the region for early detection of new, potentially invasive, species as well as for better understanding of abnormal population growth of the already known species. Management to reduce the transfer of exotics to natural habitats must be implemented

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Effects of color variation and physiological state on ascidian microbiomes

Morrison,

Erwin,

López‐Legentil

2024

MicrobiologyOpen

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Ascidians, known for their color variation, host species‐specific microbial symbiont communities. Some ascidians can also transition into a nonfiltering (resting) physiological state. Recent studies suggest that the microbial symbiont communities may vary across different physiological states and color morphs of the host. The colonial ascidian, Polyclinum constellatum, which exhibits several color morphs in the Caribbean Sea, periodically ceases its filtering activity. To investigate if color variation in P. constellatum is indicative of sibling speciation, we sequenced fragments of the ribosomal 18S rRNA and the mitochondrial cytochrome oxidase subunit I genes. Additionally, we sequenced a fragment of the 16S rRNA gene to characterize the microbial communities of two common color morphs (red and green) in colonies that were either actively filtering (active) or nonfiltering (resting). Phylogenetic analyses of both ascidian genes resulted in well‐supported monophyletic clades encompassing all color variants of P. constellatum. Interestingly, no significant differences were observed among the microbial communities of the green and red morphs, suggesting that color variation in this species is a result of intraspecific variation. However, the host's physiological state significantly influenced the microbial community structure. Nonfiltering (resting) colonies hosted higher relative abundances of Kiloniella (Alphaproteobacteria) and Fangia (Gammaproteobacteria), while filtering colonies hosted more Reugeria (Alphaproteobacteria) and Endozoicomonas (Gammaproteobacteria). This study demonstrates that microbial symbiont communities serve as reliable indicators of the taxonomic state of their host and are strongly influenced by the host's feeding condition.

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Ascidians (Urochordata: Ascidiacea) from Arraial do Cabo, Rio de Janeiro, Brazil

Cited by 20 publications

References 18 publications

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Non indigenous ascidians in port and natural environments in a tropical Brazilian bay

Effects of color variation and physiological state on ascidian microbiomes

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