The sea anemone Bunodactis octoradiata (Anthozoa: Actiniaria) from southern Patagonia: morphological study and new records

Garese, Agustín; Longo, María Victoria; Martín, Juan Pablo; Acuña, Fabián H.

doi:10.1590/s1984-46702014000500007

Cited by 4 publications

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References 5 publications

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“…Finally, the actinopharynx possessed a unique type of basitrich and microbasic p-mastigophores. Sizes of all cnidocysts and p values of normality test for residuals of a linear normal model are listed together in Table 5, while images of each cnida type were previously published in Garese et al (2014). Normality was proved for two out of ten analyzed cnidocysts [Tentacles: spirocyst; Mesenterial filaments: microbasic p-mastigophore].…”

Section: Bunodactis Octoradiatamentioning

confidence: 99%

Biometry of sea anemone and corallimorpharian cnidae: statistical distribution and suitable tools for analysis

2016

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Many studies have dealt with data on the sizes of cnidae within different groups of anthozoans, such as Actiniaria, Corallimorpharia, and Zoantharia. Statistical treatments of these data have been variable, according to the evaluation of the normality and hence the use of parametric or nonparametric tests. The normality of cnidocyst size data was assumed or proved by some authors who used parametric tests to make comparisons. Other authors carried out nonparametric tests, or even proposed alternative analytical methods, such as the use of generalized linear models. Despite controversy about the statistical distribution of cnidae sizes, there has never been an attempt to study the normality of cnidocyst size data involving a significant volume of samples, using several specimens from various different species and using the same statistical approach. The objective of this paper is to evaluate statistical adjustment to a normal distribution of cnidocyst length from four sea anemone and one corallimorpharian species. The cnidoms of all species are detailed and the hypothesis of no intraspecific variation of cnidae sizes tested as a study case. Normality was accepted in 36.42 % (SD = 17.91) of all data sets of all cnidocyst types analyzed from all studied species, while for the rest it was rejected. The evidence suggests that both normal and non-normal data sets are possible, although non-normality is slightly more frequent. Intraspecific variation of cnidocyst sizes is shown in 96.82 % of the analyzed data sets. This paper provides a simple and detailed methodology to perform comparisons of cnidae size data.

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Section: Bunodactis Octoradiatamentioning

confidence: 99%

Biometry of sea anemone and corallimorpharian cnidae: statistical distribution and suitable tools for analysis

2016

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“…This funding has not been reported so far in the intertidal or subtidal natural hard substrates from the region. However, M. senile is currently a common species in hard substrate communities from the open sea around Bahía San Julián, along with other species of sea anemones, such as Antholoba achates and Bunodactis octoradiata (Garese et al 2014). This sea anemone forms aggregates in free lower intertidal substrates, usually in tidal pools and on horizontal and vertical walls, and to a lesser extent as an epibiont (Acuña et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Fouling community dominated by <em>Metridium senile</em> (Cnidaria: Anthozoa: Actiniaria) in Bahía San Julián (southern Patagonia, Argentina)

Martín¹,

Garese²,

Acuña³

2015

Sci. Mar.

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Summary:The objective of this study is to provide information about a harbour-fouling community dominated by Metri dium senile in southern Patagonia. Several steel tubes from the wharf of Puerto San Julián were extracted to perform repair tasks, allowing the attached benthic community to be studied. Sampling was conducted at three levels: lower intertidal, 3-4 m depth and 6-7 m depth. In the lower intertidal, M. senile had a relative abundance of 43%, the most abundant accompanying species being Perumytilus purpuratus, Mytilus edulis platensis and Aulacomya atra atra. At subtidal level, the anemone showed relative abundances of 64% and 65%, and was accompanied by Monocorophium insidiosum at 3-4 m depth and by polychaetes of families Sabellidae and Syllidae at 6-7 m at depth. In the lower intertidal, epibiosis was more frequent on P. purpuratus, A. atra atra and M. edulis platensis, while in the subtidal, the richness of substrate-organisms increased significantly and the anemone was fixed to A. atra atra, M. edulis platensis, Paramolgula gregaria, Crepipatella dilatata, Austromegabalanus psittacus, Hiatella arctica, Polyzoa opuntia, Pyura sp. and Sabellidae tubes. The ability of M. senile to settle on many different organisms, along with other strategies, makes it a colonizer able to displace other species that could compete with it for substratum. Given the cosmopolitan nature of M. senile, the fact that this species has not been previously reported in the coastal zone of the region, and the results of our study, we discuss the possibility that this sea anemone is an invasive alien species in southern Patagonia, or at least a cryptogenic species.Keywords: biofouling; benthic communities; Actiniaria; Metridiidae; epibiosis; exotic species; southern Patagonia. Resumen: El objetivo de este trabajo es aportar información sobre la comunidad incrustante de un puerto de la Patagonia austral dominada por Metridium senile. Varios pilotes de acero del muelle de Puerto San Julián fueron extraídos para efectuar tareas de reparación, permitiendo realizar un estudio de la comunidad bentónica adherida a ellos. El muestreo fue realizado en tres niveles: intermareal inferior, submareal a 3-4 m y submareal a 6-7 m de profundidad. En el intermareal inferior, M. senile presentó una abundancia relativa del 43%, encontrándose acompañada por Perumytilus purpuratus, Mytilus edulis platensis y Aulacomya atra atra entre las especies más abundantes. En los niveles submareales presentó abundancias de 63 y 65%, encontrándose acompañada por el anfípodo Monocorophium insidiosum en el nivel de 3-4 m y por poliquetos de las familias Syllidae y Sabellidae en el nivel de 6-7 m de profundidad. En el intermareal inferior, la epibiosis tuvo mayor frecuencia sobre P. purpuratus, A. atra atra y M. edulis platensis, mientras que en los niveles submareales la diversidad de organismos sustrato se incrementó significativamente, observándose fijación sobre A. atra atra, M. edulis platensis, Paramolgula grega ria, Crepipatella dilatata, Austromegabalanus p...

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“…The genus Bunodactis was synonymized with Aulactinia by Dunn et al (1980) and since that time several species assignable to Bunodactis were described under the generic name Aulactinia. The taxonomic and nomenclatural problems around these two genera were discussed recently by Sanamyan et al (2013), Spano et al (2013) and Garese et. al.…”

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Aulactinia vladimiri, a new species of sea anemone (Actiniaria: Actiniidae) from Kamchatka waters, North-West Pacific

Sanamyan

Бочарова³

2015

Invertzool

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Aulactinia vladimiri sp.n. is a small sea anemone described from shallow waters in vicinity of Petropavlovsk-Kamchatsky (Pacific coasts of Russia). The species has 48 (in fully developed specimens) tentacles which are usually bright pink. In contrast with internally brooding A. stella (Verrill, 1864), A. incubans Dunn, Chia et Levine, 1980 and A. vancouverensis Sanamyan, Sanamyan et McDaniel, 2013 (three species of the genus reported for North Pacific), the eggs of A. vladimiri sp.n. are incubated in an external brood chamber. The phylogenetic analysis for A. vladimiri sp.n. showed that A. stella is the closest related species with obtained sequences of mitochondrial genes 12S rRNA,16S rRNA and cytochrome oxidase III. How to cite this article:

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The sea anemone Bunodactis octoradiata (Anthozoa: Actiniaria) from southern Patagonia: morphological study and new records

Cited by 4 publications

References 5 publications

Biometry of sea anemone and corallimorpharian cnidae: statistical distribution and suitable tools for analysis

Biometry of sea anemone and corallimorpharian cnidae: statistical distribution and suitable tools for analysis

Fouling community dominated by <em>Metridium senile</em> (Cnidaria: Anthozoa: Actiniaria) in Bahía San Julián (southern Patagonia, Argentina)

Aulactinia vladimiri, a new species of sea anemone (Actiniaria: Actiniidae) from Kamchatka waters, North-West Pacific

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