Relationships between sperm morphometry and sperm motility in the Atlantic salmon
Relationships between sperm morphometry and sperm motility in the Atlantic salmon
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DOI：
10.1111/j.1095-8649.2002.tb02495.x
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发表时间：
2002-12-01
影响因子：
2
通讯作者：
Parker, GA
中科院分区：
文献类型：
--
作者：
Gage, MJG;MacFarlane, C;Parker, GA
利用大西洋鲑萨尔莫精子性状的显著自然变异，研究了精子设计与游泳行为之间的关系。对86条大西洋鲑鱼进行了体外运动和受精试验，以测定精子在自然受精条件下的形态和功能。大西洋鲑鱼的精子性状表现出狭窄的个体内的差异，但样品之间的差异很大：平均精子长度从32.3到39.5妈妈，平均速度范围从18到127妈妈s（-1），和射精寿命从18到78秒不等。除了在精子形态之间的鱼，精子头部长度和鞭毛长度之间也发现了负相关。雄性之间精子形式和功能的这种自然变化是违反直觉的，因为测量来自单个大西洋鲑鱼种群，其中所有雄性都适应共同的受精环境。没有证据表明，较长的精子或具有较长鞭毛的精子获得更快的游泳速度。也没有证据表明平均精子速度和射精寿命之间存在权衡。然而，精子总数和鞭毛长度与射精寿命之间存在显着的负相关，因此精子较长的雄性配子寿命较短。这一发现以前曾在一项跨鱼类的研究中报道过，支持了一种理论，即较长的鞭毛产生的增加的静水压力可能会损害精子细胞的寿命。(C)2002年，不列颠群岛渔业协会。由爱思唯尔科技有限公司出版。保留所有权利。
Relationships between spermatozoal design and swimming behaviour were investigated using the significant natural variance in sperm traits in Atlantic salmon Salmo salar. In vitro motility and fertilization experiments were conducted with 86 Atlantic salmon to measure sperm form and function under natural fertilization conditions. Spermatozoal traits of Atlantic salmon showed narrow variance within individuals but differed extensively between samples: mean sperm length varied from 32.3 to 39.5 mum, mean velocity ranged from 18 to 127 mum s(-1), and ejaculate longevity varied from 18 to 78 s. In addition to variation in sperm morphometry between fish, a negative relationship was also found between sperm head length and flagellum length. This natural variation in sperm form and function between males is counter-intuitive since measures are from a single Atlantic salmon population where all males are adapted to a common fertilization environment. No evidence was found that longer sperm, or sperm with longer flagella, achieved faster swimming velocities. Also no evidence was found for a trade-off between mean sperm velocity and ejaculate longevity. There were significant negative associations, however, between sperm total and flagellum length and ejaculate longevity, so that males with longer sperm had shorter-lived gametes. This finding has previously been reported in a study across fish species, supporting the theory that increased hydrostatic forces generated by longer flagella may trade against sperm cell longevity. (C) 2002 The Fisheries Society of the British Isles. Published by Elsevier Science Ltd. All rights reserved.