Reproductive cycle of<i>Ophionereis reticulata</i>(Ophiuroidea, Echinodermata) on the southeast coast of Brazil

Yokoyama, Leonardo Q.; Duarte, Luiz Francisco Lembo; Amaral, A. Cecília Z.

doi:10.1080/07924259.2008.9652261

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…A Student T-test was used to analyze differences in the regeneration between sexes. In this particular case, only specimens from GB were used since they were also sectioned for a reproductive cycle study (YOKOYAMA & AMARAL, 2008a). Furthermore, the values of seawater temperature and salinity, measured daily in the Centro de Biologia Marinha, Universidade de São Paulo, were used to assess the possible influence on the regeneration of O. reticulata.…”

Section: Individuals Ofmentioning

confidence: 99%

“…Works were focused in the reproductive cycle (BYRNE, 1991;SELVAKUMARASWAMY & BYRNE, 1995;YOKOYAMA & AMARAL, 2008a), larval development (MEDEIROS-BERGEN & EBERT, 1995;SELVAKUMARASWAMY & BYRNE, 2000a,b), physiological aspects (DAVIS et al, 1985), feeding diet (YOKOYAMA & AMARAL, 2008b), and biological interactions (RODRIGUES & SHIMIZU, 1988). Besides that, the regeneration rates of ophiuroid populations from the South Hemisphere are still unknown and comparisons are difficult to access.…”

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confidence: 99%

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Ophionereis reticulata (Echinodermata, Ophiuroidea)

Yokoyama

Amaral

2010

Iheringia, Sér. Zool.

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ABSTRACT. This study compared the arm regeneration frequencies in two different populations of Ophionereis reticulata (Say, 1825) in São Sebastião, Southeast Brazil and observed arm regeneration between age classes (juvenile and adults) and sexes (male and female). From the 1,170 individuals sampled, 1,089 (92.2%) showed signs of arm regeneration. The relative frequencies of regenerating arms in the two areas were not different (Baleeiro Isthmus: 91.3% and Grande Beach: 99.5%). Both areas also presented similar values for the number of arms regenerating/individual and in the frequency of regenerating individuals. The major part of the regenerating scars was concentrated in the distal portion of the arm. Sub-lethal predation is most likely the cause to the high rates of arm regeneration in O. reticulata. There was no significant differences in the regeneration rates between females (3.57 ± 1.36 arms regenerating/individual) and males (3.47 ± 1.42). KEYWORDS.Ophiuroid, arm regeneration, sub-lethal predation, Brazil. RESUMO. Regeneração dos braços em duas populações deOphionereis reticulata (Echinodermata, Ophiuroidea). Este estudo comparou as frequências de regeneração dos braços de duas populações de Ophionereis reticulata (Say, 1825), de São Sebastião, sudeste do Brasil. Além disso, foram observadas diferenças nas frequências de regeneração entre classes etárias (juvenis e adultos) e entre machos e fêmeas. Dos 1.170 indivíduos coletados, 1.089 (92,2%) mostraram sinais de regeneração nos braços. A frequência relativa de braços em regeneração entre as duas áreas não diferiu significativamente (Istmo do Baleeiro: 91,3% e Praia Grande: 99,5%). Ambas as áreas apresentaram valores semelhantes no número de braços regenerando/indivíduo e na frequência de indivíduos em regeneração. A maior parte das marcas de regeneração concentraram-se na porção distal dos braços, o que indica a influência de predação subletal como a causa principal da regeneração em O. reticulata. Além disso, não houve diferença significativa nos índices de regeneração entre fêmeas (3,57 ± 1,36 braços regenerando/indivíduo) e machos (3,47 ± 1,42). PALAVRAS-CHAVE.Ofiuróide, regeneração braquial, predação subletal, Brasil.

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Section: Individuals Ofmentioning

confidence: 99%

mentioning

confidence: 99%

Ophionereis reticulata (Echinodermata, Ophiuroidea)

Yokoyama

Amaral

2010

Iheringia, Sér. Zool.

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“…In Brazil, O. reticulata spawns in the summer when the waters can reach average temperatures as high as 27°C. Yokoyama et al . (2008, 2011) concluded that the rise in water temperatures plays a major factor in the reproduction of this species.…”

Section: List Of Speciesmentioning

confidence: 99%

Untitled

2019

Zootaxa

1,524

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In more than 150 years of research in the waters surrounding the Azores, several publications on the fauna of echinoderms of the archipelago have been produced, in the form of papers, notes, reports, reviews, and monographs. This work attempts to summarize the present knowledge on this marine group in the Azorean exclusive economic zone (i.e., waters within 200 nautical miles of the archipelago’s shores). A short review of the history of the species’ taxonomy is given, with key references, geographical distribution, ecology, additional notes and, when possible, figures. We herein report 172 species of echinoderms (6 crinoids, 55 ophiuroids, 45 asteroids, 36 holothurians, and 30 echinoids) from the Azores Archipelago, most of them inhabiting deep waters (>200 m). Only 29 shallow-water species were recorded locally (≤50 m depth). In general, the echinoderm species present in the Azores are characterized by a wide geographical distribution in the Atlantic Ocean. Only nine taxa (all deep-water species, >840 m) appear to be restricted to the Azorean waters. Overall, the knowledge of the echinoderm fauna of the Azores is out-dated, with many species last collected in the archipelago over 100 years ago. A recent interest in the Azorean Mid-Atlantic waters has brought oceanographic cruises back to the archipelago, thus providing new opportunities for the renewal of 150 years of echinoderm studies in the area.

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