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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Is temperature conditioning Octopus maya fitness?
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Is temperature conditioning Octopus maya fitness?

机译：温度调节章鱼玛雅健身吗？

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摘要

Temperature is a key factor that modulates Octopus maya reproduction. Evidence shows that wild females spawn when ambient natural temperatures are lower than 26 degrees C, caused by either the winter sea temperatures or the upwelling events. The upwelling determines the availability of cold and nutrient rich water during spring and summer in the northern side of the Yucatan Peninsula (YP). We determined the effects of ambient temperature on the reproductive performance of female Octopus maya maintained in thermal regimes that simulate (a) high summer temperature at the eastern side of the YP (31 degrees C), (b) winter temperature in all the YP (24 degrees C), and (c) a temperature decrease (TD) at a rate of 1 degrees C/5d from 31 to 24 degrees C. The number of spawns, eggs spawned by female, fertilization percentage, embryos development, and hatchlings survival after starvation were evaluated for each thermal regime. At 31 degrees C spawning of Octopus maya females is inhibited; only 13% spawned. The few fertilized eggs spawned died after two 2 weeks, indicating that high temperatures are deleterious to embryos. Females exposed to temperature changes of 1 degrees C/5 d spawned only after temperature reached below 27 degrees C, 87% of the females spawned. At the end TD treatment a mean value of 530 eggs per spawn was observed. Fertilization of spawns was around 50%. All the females maintained at 24 degrees C spawned a mean of 1208 eggs/spawn with a 70.5% fertilization rate. Embryonic development was interrupted early in TD treatments causing premature hatchlings by day 31. These premature juveniles showed smaller sizes and low survival (48%) after a 10-day fast. In contrast, embryos spawned at 24 degrees C exhibited larger development (45d), and hatchlings survival after a 10-day fast was 100%. Our results explain why Octopus maya spawns are limited to winter in the western side of the YP, when temperatures drop due to polar winds. Results also highlight the importance of the Yucatan upwelling for maintaining suitable conditions for spawning, embryo development, and hatchling survival along the year at Eastern border of the YP. We consider that this species could be negatively affected if climate change leads to an ocean warming scenario. (C) 2015 Elsevier B.V. All rights reserved.
机译：温度是调节章鱼玛雅繁殖的关键因素。有证据表明，由于冬季海水温度或上升流事件而导致周围自然温度低于26摄氏度时，野生雌性会产卵。上升流决定了春季和夏季尤卡坦半岛（YP）北部的冷水和营养丰富的水的可用性。我们确定了环境温度对维持在模拟（a）YP东侧（31摄氏度）的夏季高温（b）所有YP（ （24摄氏度），以及（c）以1摄氏度/ 5d的速度从31摄氏度降至24摄氏度。产卵数，雌性产卵数，受精率，胚胎发育和幼体存活饥饿后评估每种热疗方案。在摄氏31度，章鱼玛雅雌鸟的产卵受到抑制。仅产生了13％。产卵的少量受精卵在两两周后死亡，这表明高温对胚胎有害。仅在温度低于27摄氏度后才产卵于1 C / 5 d温度变化的雌性产卵，其中87％的雌性产卵。在TD处理结束时，观察到每个产卵530个卵的平均值。产卵的受精率约为50％。保持在24摄氏度的所有雌性平均产卵1208个卵/受精率达70.5％。在TD治疗的早期，胚胎发育被中断，导致第31天的早孵化。这些早熟的幼虫在禁食10天后表现出较小的体型和较低的存活率（48％）。相反，在24摄氏度产卵的胚胎表现出更大的发育（45d），在禁食10天后的孵化率达到100％。我们的结果解释了为什么八达通玛雅人的产卵仅限于YP西侧的冬季，因为极风导致温度下降。结果还突出显示了尤卡坦半岛上升流对于维持YP东部边界全年的产卵，胚胎发育和孵化存活条件的重要性。我们认为，如果气候变化导致海洋变暖，该物种可能受到不利影响。 （C）2015 Elsevier B.V.保留所有权利。

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    Juarez Oscar E.; Galindo-Sanchez Clara E.; Diaz Fernando; Re Denise; Sanchez-Garcia Ariadna M.; Camaal-Monsreal Claudia; Rosas Carlos;

  • 作者单位

    Ctr Invest Cient & Educ Super Ensenada, Dept Biotecnol Marina, Lab Genom Func Organismos Marinas, Ensenada, Baja California, Mexico;

    Ctr Invest Cient & Educ Super Ensenada, Dept Biotecnol Marina, Lab Genom Func Organismos Marinas, Ensenada, Baja California, Mexico;

    Ctr Invest Cient & Educ Super Ensenada, Dept Biotecnol Marina, Lab Ecofisiol Organismos Acuat, Ensenada, Baja California, Mexico;

    Ctr Invest Cient & Educ Super Ensenada, Dept Biotecnol Marina, Lab Ecofisiol Organismos Acuat, Ensenada, Baja California, Mexico;

    Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Ciencias Mar & Limnol, Sisal, Yucatan, Mexico;

    Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Yucatan, Mexico;

    Univ Nacl Autonoma Mexico, Fac Ciencias, Unidad Multidisciplinaria Docencia & Invest, Sisal, Yucatan, Mexico;

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  • 正文语种 eng
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  • 关键词

    Spawning; Reproductive success; Fitness; Temperature; Octopus maya;

    机译：产卵;生殖成功;健身;温度;章鱼玛雅;

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