Reproductive Behaviors Related to Life History Forms in Male Masu Salmon, Oncorhynchus masou Breboort, in Lake Toya, Japan
Reproductive Behaviors Related to Life History Forms in Male Masu Salmon, Oncorhynchus masou Breboort, in Lake Toya, Japan
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日本洞爷湖雄性马苏鲑鱼 (Oncorhynchus masou Breboort) 与生活史形式相关的繁殖行为
DOI：
10.1080/02705060.2002.9663896
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发表时间：
2002
影响因子：
1.3
通讯作者：
K. Edo
中科院分区：
文献类型：
--
作者：
Toshiaki Yamamoto;K. Edo
摘要通过对雄性马苏鲑产卵行为的观察，探讨雄性马苏鲑的生活史类型与其繁殖策略之间的关系。标准雄性（平均值± SD = 43.0 ± 7.1厘米）迁移到湖中并返回纳塔尔小溪产卵，与其他雄性争夺生殖群体中的主导雄性。在生殖群体中占据主导地位的雄性会强烈攻击类似雌性的雄性，并保卫产卵雌性周围的区域免受其他雄性的侵害。幼年雄性（22.3 ± 6.3厘米），在湖中生长，成熟时保留着幼犬的标记，试图在从属群体中获得更高的等级地位，同时经常受到统治者的攻击。早熟雄性（成熟雄性幼仔，11.5 ± 3.3厘米），成熟后不迁移到湖中，有一种倾向，占据靠近雌性的位置，并试图使用偷偷摸摸的交配策略。这些雄性并没有被占统治地位的雄性攻击。这说明不同的生活史类型与不同的生殖策略有关。
ABSTRACT We observed the spawning behaviors of male masu salmon (Oncorhynchus masou) to examine whether the life history forms of males were related to the reproductive tactics. Standard males (mean ± SD = 43.0 ± 7.1 cm), which migrate into the lake and return to the natal creek for spawning, fought with other males to become the dominant male in the reproductive group. The male that became dominant in the reproductive group intensively attacked males of a similar sue and defended an area around a spawning female against other males. Puerile males (22.3 ± 6.3 cm), which grow in the lake and mature while retaining parr marks, attempted to gain a higher hierarchical position in the subordinate group, while being attacked frequently by the dominant male. Precocious males (mature male parr, 11.5 ± 3.3 cm), which mature without migrating to the lake, had a tendency to occupy positions near the females and attempted to use sneaking mating tactics. These males were not attacked by the dominant male. This indicates that the different life history forms of males are associated with different reproductive tactics.