Evidence that temperature change cues reproductive development in the spiny damselfish, Acanthochromis polyacanthus
Evidence that temperature change cues reproductive development in the spiny damselfish, Acanthochromis polyacanthus
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有证据表明温度变化会促进多棘雀鲷的生殖发育
DOI：
10.1023/a:1023601729203
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发表时间：
2003
影响因子：
1.4
通讯作者：
N. Pankhurst
中科院分区：
文献类型：
--
作者：
Mark Hilder;N. Pankhurst
温度在棘雀鲷（Acanthochromis polyacanthus）生殖发育中的作用是通过测量温度变化4°C时的排卵周期和血浆性腺激素水平的变化来评估的。这在性成熟、配对和未配对的鱼中进行了评估。还评估了育雏对繁殖活动的影响。温度变化对性成熟、繁殖活跃的雌鱼的产卵周期有显著影响，但对卵的存在没有显著影响。温度从24℃升高到28℃，排卵期从32天减少到21天。孵育温度显著影响卵群的成活率，在24℃条件下，13只卵群中只有1只存活到孵化，而在28℃条件下，51只卵群中有50只存活。配对鱼的性腺类固醇产量与温度升高呈正相关。雌性鱼血浆中17β-雌二醇和睾酮(T)的水平显著增加，而将成对的雄性鱼暴露在24°C至28°C的温度下，T和11-酮酮没有变化。在未配对的鱼类中，温度变化对血浆类固醇水平的影响不明确，这表明社会环境对温度刺激生殖发育是必要的。
The role of temperature in the reproductive development of the spiny damselfish,Acanthochromis polyacanthus, was assessed by measuring changes in ovulatory periodicity and plasma levels of gonadal steroids in response to temperature shifts of 4°C. This was assessed in sexually mature, paired and unpaired fish. The effect of brood presence on reproductive activity was also assessed. Temperature change but not brood presence significantly affected the spawning periodicity of sexually mature, reproductively active pairs. A temperature increase from 24°C to 28°C resulted in a decrease in the ovulatory period from 32 days to 21 days. Incubation temperature was found to dramatically affect survival of the egg clutches with only one of 13 egg clutches surviving to hatching at 24°C, compared with 50 of 51 egg clutches surviving at 28°C. Gonadal steroid production was positively correlated with temperature increase in paired fish. Plasma levels of 17β-estradiol and testosterone (T), increased significantly in female fish, whereas there was no change in T and 11-ketotestosterone, in paired male fish exposed to a temperature increase from 24°C to 28°C. In unpaired fish, temperature change had ambiguous affects on plasma steroid levels, suggesting that social context is necessary for stimulation of reproductive development by temperature.