Characterization of the moult cycle in Neocaridina denticulata sinensis Kemp, 1918: the moulting frequency, moulting stages, and haemolymph ecdysteroid levels
In: CrustaceanaInstitute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Abstract
This study aims to elucidate the physical evidence of the moulting stages and the characteristics of ecdysteroid levels in the moulting cycle of Neocaridina denticulata sinensis. From hatching to the first complete pleopod development, N. denticulata sinensis moults 14 times at 25°C in the laboratory. The whole process was divided into four stages based on the moulting characteristics during the various intervals. Using the structural changes of the telson and Drach’s classification system, four moulting periods (postmoult, intermoult, premoult, and ecdysis) were recognized. In addition, based on the changes of the setal lumen, internal cone, and the epidermis, the premoult period was further divided into five substages (D0, D1, D2, D3, and D4). Despite similar fluctuation patterns in mature males and females, significant differences of haemolymph ecdysteroid titers were revealed in postmoult, intermoult, and premoult. These works will provide an important additional reference for the exploration of the moulting mechanism in crustaceans.
Résumé
Cette étude vise à élucider la caractéristique physique des stades de mue et les valeurs d’ecdystéroïdes au cours du cycle de mue de Neocaridina denticulata sinensis. De l’éclosion au développement complet du premier pléopode, N. denticulata sinensis mue 14 fois à 25°C au laboratoire. Le processus a été divisé en quatre stades basés sur les caractéristiques de la mue au cours des divers intervalles. A partir des modifications du telson et du système de classification de Drach, quatre périodes ont été reconnues (postmue, intermue, prémue et ecdysis). De plus, sur la base des changements de la lumière de la soie, du cône interne et de l’épiderme, la prémue a été encore divisée en cinq sous-stages (D0, D1, D2, D3, et D4). Malgré des fluctuations similaires entre mâles et femelles, des variations significatives des ecdystéroïdes de l’hémolymphe sont présentes en postmue, intermue et prémue. Ce travail fournira une référence supplémentaire pour l’exploration du mécanisme de la mue chez les Crustacés.
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Characterization of the moult cycle in Neocaridina denticulata sinensis Kemp, 1918: the moulting frequency, moulting stages, and haemolymph ecdysteroid levels
In: CrustaceanaInstitute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Institute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Institute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Institute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Institute of Life Science and Green Development, Hebei University, Baoding, Hebei Province, P.R. China
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Abstract
This study aims to elucidate the physical evidence of the moulting stages and the characteristics of ecdysteroid levels in the moulting cycle of Neocaridina denticulata sinensis. From hatching to the first complete pleopod development, N. denticulata sinensis moults 14 times at 25°C in the laboratory. The whole process was divided into four stages based on the moulting characteristics during the various intervals. Using the structural changes of the telson and Drach’s classification system, four moulting periods (postmoult, intermoult, premoult, and ecdysis) were recognized. In addition, based on the changes of the setal lumen, internal cone, and the epidermis, the premoult period was further divided into five substages (D0, D1, D2, D3, and D4). Despite similar fluctuation patterns in mature males and females, significant differences of haemolymph ecdysteroid titers were revealed in postmoult, intermoult, and premoult. These works will provide an important additional reference for the exploration of the moulting mechanism in crustaceans.
Résumé
Cette étude vise à élucider la caractéristique physique des stades de mue et les valeurs d’ecdystéroïdes au cours du cycle de mue de Neocaridina denticulata sinensis. De l’éclosion au développement complet du premier pléopode, N. denticulata sinensis mue 14 fois à 25°C au laboratoire. Le processus a été divisé en quatre stades basés sur les caractéristiques de la mue au cours des divers intervalles. A partir des modifications du telson et du système de classification de Drach, quatre périodes ont été reconnues (postmue, intermue, prémue et ecdysis). De plus, sur la base des changements de la lumière de la soie, du cône interne et de l’épiderme, la prémue a été encore divisée en cinq sous-stages (D0, D1, D2, D3, et D4). Malgré des fluctuations similaires entre mâles et femelles, des variations significatives des ecdystéroïdes de l’hémolymphe sont présentes en postmue, intermue et prémue. Ce travail fournira une référence supplémentaire pour l’exploration du mécanisme de la mue chez les Crustacés.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 521 | 180 | 24 |
| Full Text Views | 51 | 23 | 1 |
| PDF Views & Downloads | 58 | 29 | 3 |