How do dietary diatoms cause the sex reversal of the shrimp Hippolyte inermis Leach (Crustacea, Decapoda)

Zupo, Valerio; Messina, Patrizia

doi:10.1007/s00227-006-0524-9

Cited by 45 publications

(44 citation statements)

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“…This does not seem to occur in our H. inermis population (it did not occur in the French population analyzed by Veillet et al, 1963 either) and only a few intersex specimens have been cited by reverberi (1950), all of which were parasitized by bopyrids. The data presented in the this work suggest that H. inermis could have a highly plastic population structure, with a unique kind of partial protandry that involves primary females and males (following bauer, 2004), with sex determination occurring in the last larvae stages (zupo, 2000;zupo and Messina, 2007). in these life cycle strategies (Fig.…”

Section: Discussionmentioning

confidence: 76%

Structure and absolute growth of a population of Hippolyte inermis Leach 1815 (Decapoda: Caridea) from Zostera marina (L.) meadows (Malaga, southern Spain)

Manjón‐Cabeza

Cobos

2009

Sci. Mar.

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suMMary: The Hippolyte inermis Leach 1815 population from Zostera marina beds in southern spain showed two recruitment periods that occurred simultaneously for both sexes (from september to December and from april to june), in a size range between 1.67 and 1.90 mm carapace length, due to gonadal activity and eggs hatching in summer and winter. The estimated Von bertalanffy parameters were used to determine absolute growth and showed that males live for around 8 months and females for around 12 months; consequently, four cohorts for males and 7 to 8 for females can coexist throughout the cycle. The sex ratio favours females throughout the entire life cycle. Data published on the reproductive biology of H. inermis support the idea that this is a protandric hermaphrodite species, though recent studies have revealed that there is no histological proof of hermaphroditic sexuality in adult specimens of this species. The results obtained here indicate that the Cañuelo beach Hippolyte inermis population has a gonochoric structure. if H. inermis were to have hermaphroditic sexuality, the sex reversal of adult males would occur in a single moult in the size range between 2.42 and 3.22 mm. These new, secondary females would be incorporated into the primary female cohort at practically the same size, although they would be 0.12 to 5.20 months younger. our results, compared with those from other population studies, suggest that this species has a highly plastic population structure, which seems to be determined by external factors and which varies between the protandric and gonochoric condition, depending on the conditions of the habitat.Keywords: Hippolyte inermis, Caridea, growth, population dynamic, reproductive biology. rEsuMEn: Estructura y crecimiento absoluto de una población de Hippolyte inermis Leach 1815 (Decapoda: Caridea) de las praderas de Zostera marina (L.) (Málaga, Sur de España). -El estudio de una población de Hippolyte inermis Leach 1815 de fondos de Zostera marina del sur de España muestra dos periodos de reclutamiento simultáneo para ambos sexos, de septiembre a diciembre y de abril a junio, en un rango de talla de 1.67-1.90 mm como consecuencia de la maduración gonadal y la eclosión de la puesta en verano e invierno. El estudio de los parámetros de Von bertalanffy muestra que el modelo de crecimiento absoluto es de tipo indeterminado y que los machos viven alrededor de 8 meses, mientras que las hembras son más longevas (12 meses); consecuentemente durante el período de estudiado coexisten 4 cohortes para los machos y 7-8 para las hembras. El estudio de crecimiento poblacional revela que éste viene determinado por el de las hembras, ya que el sex-ratio siempre es a favor de estas últimas. Datos publicados sobre Hippolyte inermis apoyan que se trata de una especie hermafrodita proterándrica, aunque estudios histológicos en adultos no apoyan esta hipótesis. En el caso de la población estudiada, el conjunto de resultados obtenidos justifican sobradamente que se trata de una población gonocórica. si existier...

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Section: Discussionmentioning

confidence: 76%

Structure and absolute growth of a population of Hippolyte inermis Leach 1815 (Decapoda: Caridea) from Zostera marina (L.) meadows (Malaga, southern Spain)

Manjón‐Cabeza

Cobos

2009

Sci. Mar.

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“…scutellum diatoms, responsible for triggering apoptosis in the crustacean Hippolyte inermis' androgenic gland during its post larval development (Zupo & Messina, 2007), were investigated in order to establish whether they displayed apoptotic activity also on human tissues. The preliminary screening (unpublished data from the authors) revealed that BT20 is the most responsive cell line to C. scutellum (up to 26.1% of apoptotic cells at 2.5 ng/ml of diatoms).…”

Section: Resultsmentioning

confidence: 99%

“…The benthic diatom C. scutellum, responsible for triggering apoptosis in Hippolyte inermis' androgenic gland (Zupo, 2000;Zupo & Messina, 2007), was investigated in order to establish whether it displayed an apoptotic effect also on human tissues. Diatoms have been traditionally considered a key point in the marine food chain.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies showed that Cocconeis scutellum Ehrenberg (Bacillariophyceae) diatoms provoke specific apoptosis in the androgenic gland of the decapod Hippolyte inermis Leach (Decapoda) (Zupo & Messina, 2007), affecting the crustacean's sex reversal. Here we report the potential of C. scutellum diethyl ether extract and its fractions, and EPA to induce apoptosis in several human cell lines, and mainly in the breast carcinomaderived line BT20.…”

Section: Short Communicationmentioning

confidence: 99%

“…scutellum diatoms were isolated and cultivated in the Stazione Zoologica "A. Dohrn", Ischia, (Italy) as described in Zupo and Messina (2007).…”

Section: Diatom Cultivationmentioning

confidence: 99%

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How do dietary diatoms cause the sex reversal of the shrimp Hippolyte inermis Leach (Crustacea, Decapoda)

Cited by 45 publications

References 44 publications

Structure and absolute growth of a population of <em>Hippolyte inermis</em> Leach 1815 (Decapoda: Caridea) from <em>Zostera marina</em> (L.) meadows (Malaga, southern Spain)

Structure and absolute growth of a population of <em>Hippolyte inermis</em> Leach 1815 (Decapoda: Caridea) from <em>Zostera marina</em> (L.) meadows (Malaga, southern Spain)

Apoptotic activity of the marine diatomCocconeis scutellumand eicosapentaenoic acid in BT20 cells

Chemical War in Marine Animal Forests: Natural Products and Chemical Interactions

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