한국수산과학회

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  • pISSN : 2234-8395
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  • eISSN : 2234-1757

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kfas, vol. 53, no. 1, pp.83-89, February, 2020
DOI. https://doi.org/10.5657/KFAS.2020.0083

Comparative Early Life History of Two Pipefish, Urocampus nanus
and Syngnathus schlegeli (Syngnathidae) in Laboratory Culture from
Korea
실험실 사육에 의한 한국산 실고기과(Syngnathidae) 2종, 풀해마(Urocampus
nanus)와 실고기(Syngnathus schlegeli)의 초기생활사 비교

이재환ㆍ김진구*
부경대학교 자원생물학과

This study provides a detailed morphological description of larvae obtained from Urocampus nanus and Syngnathus
schlegeli male brood fish over 20 days of culture in the laboratory. In both species, mating takes place when several
males each spread their brood pouch like a wing to attract a female's attention. When the female begins to swim upward,
the males follow her and receive her eggs in their brood pouches. Newborn larvae of U. nanus and S. schlegeli
had already completed formation of dorsal and caudal fin rays, but not of pectoral fin rays. Pectoral fin rays were
completely formed 15 days after release in S. schlegeli and 20 days after release in U. nanus. The ratio of caudal fin
length to standard length increased until 8 days and decreased thereafter in S. schlegeli, while in U. nanus this ratio
declined continuously after hatching. The larvae of the two species were very similar in external morphology, but
well distinguished by the number of dorsal fin rays (15-16 in U. nanus vs. 39-43 in S. schlegeli), the presence of a
membrane under the tail (absent in U. nanus vs. present in S. schlegeli), and the presence of melanophores in the
dorsal fin (present in U. nanus vs. absent in S. schlegeli). Based on this study, U. nanus appears to be evolutionally
more similar to pipefish than to seahorse.

Keyword : Early life history, Urocampus nanus, Syngnathus schlegeli, Syngnathidae, Korea

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