Species identification of later larval stages in three amphidromous shrimp species (Atyidae)
2007
Nakahara, Y.(Seibu Environmental Research Co. Ltd., Sasebo, Nagasaki (Japan)) | Hagiwara, A. | Miya, Y. | Hirayama, K.
Despite of the significance of three species of amphidromous atyd shrimp, Caridina typus, C. serratirostris, and C. leucosticta in coastal ecosystem in southwest Japan, their morphological characteristics in early life history have not been clarified. It has been known that the distribution pattern of chromatophores differs in zoeal I and II stages of the above species. However, morphological features of later zoeal stages for species identification have not been unidentified. We compared the morphological features of the above species based on the larval specific under laboratory culture. Among the characters examined, only the shape of carapace is distinct and useful for species identification, and this can be used to identify larval insters after Zoea III. The zoeal instars were easily identified by the shape of pereopod, pleopod and tail. The larval developmental patterns of C. typus and C. serratirostris were almost the same. The number of zoeal instars and duration of C. leucosticta were smaller and shorter than the two other species.
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