蓝环水母(Phyllorhiza sp.)无性繁殖过程及形态变化观察

doi:10.11978/2024062

Abstract

Abstract:

In this experiment, the conditions for amplifying polyp populations and strobilation of Phyllorhiza sp. were studied. The asexual reproductive process and the metamorphosis of ephyra into medusa were observed and described. Phyllorhiza sp. is characterized by two asexual reproduction modes: swimming buds and strobilation. Polyps can be permanently stored in laboratory. Both the producing swimming buds and strobilation can be observed at 20~25°C. It takes 10~12 days for metamorphosis to mature polyps after swimming buds attachment. It takes 2~3 days to produce swimming buds for polyp asexual reproduction. Monodisc is the strobilation mode of Phyllorhiza sp. and it takes 4~5 days before the ephyra gets rid of the residual polyp. The edge of the central disc of strobila keeps blue-purple from the formation of rhopalia to the disappearing of polyp tentacles. It takes 12 days for ephyra to develop into juvenile medusa under 25°C, 29‰~32‰ (salinity).

Key words: Phyllorhiza sp., polyp, ephyra, asexual reproduction, morphology

CLC Number:

Q953.3

HAO Yanxia, ZHAO Yuxuan, DENG Liqiu, ZHANG Ruixue, WANG Shuhong. Observation on the asexual reproduction of Phyllorhiza sp.[J].Journal of Tropical Oceanography, 2025, 44(1): 35-43.

Figures/Tables 9

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References 33

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发育过程	时间/d	长(胞芽或水螅体TBL)/(μm)	宽(胞芽或水螅体MDD/(μm)
刚附着的胞芽	0	350±29	232±29
8触手水螅体	1	550±119	315±35
10触手水螅体	1—2	650±158	359±35
12触手水螅体	2—4	746±231	363±38
14触手水螅体	3—6	821±169	379±44
16触手水螅体	4—8	1025±161	405±40
成熟水螅体	10—12	1925±279	674±89

发育过程	时间/d	TBD/mm
刚脱落的碟状体	0	3.69±0.42
循环系统最初环管形成	5—7	6.83±0.77
网状循环系统	8—10	9.47±1.08
形成8个口腕	11—13	10.88±1.14

Observation on the asexual reproduction of Phyllorhiza sp.

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