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首页> 外文期刊>ICES Journal of Marine Science >Gonad maturation in Octopus vulgaris during ongrowing, under different conditions of sex ratio
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Gonad maturation in Octopus vulgaris during ongrowing, under different conditions of sex ratio

机译：不同性别比条件下八达通在生长过程中的性腺成熟

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摘要

Octopus vulgaris is a suitable candidate for aquaculture, but there are problems with breeding in captivity, such as aggressive behaviour among males and the frequent death of females after the eggs hatch. To avoid these problems and further understand the sexual maturation of common octopus in captivity, males and females were reared together and separately under similar culture conditions. In all trials, the initial rearing density was 10 kg m~(-3). Females (n = 15, sex ratio 0:1) and males (n = 11, sex ratio 1:0) were kept in circular tanks, and a mixed group (n = 209, sex ratio 4:1) in floating cages. Trials started in November 2008 and octopuses from each treatment were examined macroscopically and histologically in December and January to assess sexual maturation. All the males matured, regardless of the sex ratio during rearing, as did all females in the mixed group. In contrast, a large proportion of the females kept isolated from males was still immature in December and January. Although maturation was successful in floating cages, there was 76% mortality there, in contrast to the zero mortality in tanks. Moreover, most of the dead octopuses from the cages were in post-reproductive condition, with a low digestive gland index, suggesting that this was natural post-reproductive mortality. Therefore, sex segregation is deemed advantageous to avoiding early mortality.
机译：普通章鱼是适合水产养殖的候选物，但人工饲养中存在一些问题，例如雄性的侵略行为和卵孵化后雌性的频繁死亡。为避免这些问题并进一步了解圈养普通章鱼的性成熟，在相似的培养条件下将雄性和雌性分开饲养。在所有试验中，初始饲养密度为10 kg m〜（-3）。雌性（n = 15，性别比0：1）和雄性（n = 11，性别比1：0）被放置在圆形水箱中，混合组（n = 209，性别比4：1）被放置在浮笼中。试验于2008年11月开始，在12月和1月对每种疗法的章鱼进行了宏观和组织学检查，以评估性成熟情况。不论性别如何，所有雄性都成熟，混合组中的所有雌性也一样。相反，在12月和1月，与男性隔离的大部分女性仍未成熟。尽管在网箱中成熟是成功的，但在那里的死亡率为76％，而在水箱中死亡率为零。此外，笼中死去的章鱼多数处于生殖后状态，消化腺指数低，表明这是自然的生殖后死亡率。因此，性别隔离被认为有利于避免早期死亡。

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  • 来源
    《ICES Journal of Marine Science》 |2010年第7期|P.1487-1493|共7页
  • 作者

    Juan Estefanell; Juan Socorro; Francisco J. Roo; Rafael Guirao; Hipolito Femandez-Palacios; Marisol Izquierdo;

  • 作者单位

    Grupo de Investigacion en Acuicultura, Instituto Canario de Ciencias Marinas i Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, PO Box 56, E-35200 Telde Las Palmas de Gran Canaria, Spain;

    rnGrupo de Investigacion en Acuicultura, Instituto Canario de Ciencias Marinas i Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, PO Box 56, E-35200 Telde Las Palmas de Gran Canaria, Spain IBS Maritimo Pesquero de Las Palmas, Simon Bolivar 15, E-35007 Las Palmas de Gran Canaria, Spain;

    rnGrupo de Investigacion en Acuicultura, Instituto Canario de Ciencias Marinas i Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, PO Box 56, E-35200 Telde Las Palmas de Gran Canaria, Spain;

    rnCANEXMAR SL, Palangre s nave 1, Castillo del Romeral, San Bartolome de Tirajana, Las Palmas de Gran Canaria, Spain;

    rnGrupo de Investigacion en Acuicultura, Instituto Canario de Ciencias Marinas i Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, PO Box 56, E-35200 Telde Las Palmas de Gran Canaria, Spain;

    rnGrupo de Investigacion en Acuicultura, Instituto Canario de Ciencias Marinas i Instituto Universitario de Sanidad Animal y Seguridad Alimentaria, PO Box 56, E-35200 Telde Las Palmas de Gran Canaria, Spain;

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  • 关键词

    digestive gland; gonad maturation; mortality; Octopus vulgaris;

    机译：消化腺性腺成熟;死亡;八达通;

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