考氏鳍竺鲷(Pterapogon kauderni)早期色素细胞发育和体色变化

doi:10.11978/2024143

Abstract

Abstract:

By microscopic observation and photography, the morphological characteristics and distribution of chromatophores during the early life history of Pterapogon kauderni were investigated, as well as the body color changes. The results showed that it took 15~22 days for a fertilized egg to hatch under (27±0.5) ℃. The embryo developed to the organ formation stage on the 4th day post fertilization (dpf). Melanin appeared in the eyeball at 6 dpf, xanthophore appeared at the somites at 7 dpf, reflecting platelets appeared in the eye at 8 dpf, and leucophores emerged on the second dorsal fin at 19 dpf. The formation of body color pattern of P. kauderni began with the appearance of melanocytes in the interorbital space at 12 dpf; the first pigment band in the snout became visible at 21 dpf; the yolk sac was completely absorbed and the four lateral pigment bands on the body and the Y-shaped pigment band at the tail were largely formed on the 1st day post hatching (dph). White spots started to appear between the third and fourth pigment bands in the middle of the body at 70 dph, and the body color was consistent with that of a 2-year-old adult fish at 220 dph. The research results can provide a theoretical basis for exploring the regulation mechanism of body color formation in P. kauderni and the development of ornamental fish evolution theory, as well as their genetic breeding.

Key words: Pterapogon kauderni, chromatophores, body color pattern, early development

CLC Number:

S917.4

YU Tianhong, FAN Yuxuan, LI Ling, CHEN Nan, WANG Shuhong. Early ontogeny of chromatophores and body color changes of the Banggai cardinalfish, Pterapogon kauderni[J].Journal of Tropical Oceanography, 2025, 44(3): 130-140.

Figures/Tables 5

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References 35

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发育时期	开始时间(孵化后)	全长/mm	体高/mm	主要特征
稚鱼期	1d	10.78±0.16	2.94±0.11	卵黄囊消失, 各鳍条逐渐形成, 色素带基本形成
幼鱼期	50d	20.37±1.40	5.34±0.42	鳍条分化完全, 鳞片形成, 白色斑点开始形成
成鱼期	220d	58.77±5.66	18.99±2.03	性腺发育成熟, 色彩图案稳定

Early ontogeny of chromatophores and body color changes of the Banggai cardinalfish, Pterapogon kauderni

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