Abstract
Choniomyzon inflatus Wakabayashi, Otake, Tanaka & Nagasawa, 2013 (Copepoda: Siphonostomatoida: Nicothoidae), an associate of the scyllarid lobster Ibacus novemdentatus Gibbes, was found to pass through at least four developmental stages: nauplius, copepodid I (CI), copepodid II or later (CII+) and adult. Free-living nauplii were observed hatching from the ovisacs of adult females. CI was found on the body surface of both female and male hosts, whereas CII+ and adult were obtained from the female host’s egg masses. The life-cycle of this copepod is presumed to be as follows: (i) nauplius develops into CI in the water column; (ii) infective CI settles on body surface of host; (iii) CI moults into the following stage, changing its microhabitat from host’s body surface to egg masses; (iv) CII+ develops on egg masses of host until adult stage; and (v) adult female and male mate on the host’s egg masses.
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Acknowledgements
We thank Professor Yumiko Yoshie-Stark, Department of Food Life Science, Toyo University, for her helpful assistance with SEM observation. We are also grateful to Hiroo Kitazawa, Shimane Prefecture Fisheries Technology Center, for his help with lobster sampling and to two anonymous reviewers for their constructive comments.
Funding
This study was partly supported by the Sasakawa Scientific Research Grant (No. 25–520) from the Japan Science Society to SO and the Japan Society for the Promotion of Science KAKENHI Grant number (No. 25·10983) to KW.
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Otake, S., Wakabayashi, K., Tanaka, Y. et al. Life-cycle of Choniomyzon inflatus Wakabayashi, Otake, Tanaka & Nagasawa, 2013 (Copepoda: Siphonostomatoida: Nicothoidae) with the morphological descriptions of the nauplius, copepodid and adult male. Syst Parasitol 93, 145–157 (2016). https://doi.org/10.1007/s11230-015-9612-x
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DOI: https://doi.org/10.1007/s11230-015-9612-x