GROWTH AND EARLY SEXUAL-MATURATION IN BALTIC SALMON (SALMO-SALAR) PARR
GROWTH AND EARLY SEXUAL-MATURATION IN BALTIC SALMON (SALMO-SALAR) PARR
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DOI：
10.1139/z92-032
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发表时间：
1992-02-01
期刊：
影响因子：
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通讯作者：
BERGLUND, I
中科院分区：
文献类型：
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作者：
BERGLUND, I
在瑞典北方的乌梅河（Umealven）的孵化场中研究了波罗的海鲑鱼（萨尔莫salar）parr的性成熟和生长之间的关系。雄性幼仔在1岁以上时性成熟的概率与其在0岁以上实验开始时的大小呈正相关。成熟和未成熟雄性的特定生长速率和条件因子相似，直到性腺生长开始时，成熟雄性的生长速率下降。在性腺发育开始前的3周内，未成熟幼仔的同胞组被喂食不同的口粮。在不同投喂率期间，不同投喂率组的性成熟率与生长速度呈线性相关。这项研究表明，在1岁的大小，导致在第一个夏天的增长速度，并在性腺生长的发病前的一段时间内的增长机会影响成熟的发病率在男性parr的年龄1 +。
The relationship between sexual maturation and growth in Baltic salmon (Salmo salar) parr was studied in hatchery stock originating from the Umealven (Ume River) in northern Sweden. The probability that a male parr would mature sexually at age 1 + was positively related to its size at the start of the experiment at age 0 +. The specific growth rate and condition factor of maturing and nonmaturing males were similar until the onset of gonadal growth, when the growth rate of maturing males decreased. Sibling groups of immature parr were fed different rations during the 3 weeks prior to the start of gonadal development. The incidence of sexual maturation in the groups given different rations was linearly related to the growth rate during the period of different feeding rates. This study suggests that both the size at age 1, resulting from the growth rate during the first summer, and the opportunity for growth during the period preceding the onset of gonadal growth affect the incidence of maturation in male parr of age 1 +.