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首页> 外文期刊>Journal of Fish Biology >Lifetime consequences of variable 0 year group length in riverine populations of chub Leuciscus cephalus (L.)
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Lifetime consequences of variable 0 year group length in riverine populations of chub Leuciscus cephalus (L.)

机译：0年组长的可变性对河生白头翁（L.）的河川种群的终生影响

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摘要

The fork length (L-F) of individual chub Leuciscus cephalus in English riverine populations at the end of their first growth season varied considerably, ranging from < 25 to > 70 mm. This had a significant influence on the subsequent growth of individuals over their lifetime. Chub of small L-F at age 1 year generally produced smaller annual growth increments throughout life than those of longer L-F at age 1 year, although they had the potential to attain greater ultimate L-F. This variability in L-F at age 1 year resulted, at least in part, from multiple spawning events over a protracted period, that caused variation in the growing seasons for 0 year group chub of the same year class. Since the adult population contained individuals that only attained L-F of < 25 mm at the end of their first growing season, it is possible that L-F at age 1 year may not be such a major precursor to strong chub recruitment as previously thought.
机译：英国河沿河种群在其第一个生长季节结束时的叉长（Leuciscus cephalus）叉长（L-F）变化很大，范围从<25到> 70 mm。这对个体在其一生中的后续成长具有重大影响。与1岁时较长L-F相比，1岁时较小L-F的Chub通常在整个生命中产生的年增长增量较小，尽管它们有可能获得更大的最终L-F。 1岁时L-F的这种变化至少部分是由于在一段较长的时间内发生了多个产卵事件，这些事件导致了同一年级的0年组突突的生长期变化。由于成年人群中只有一个人在其第一个生长季节结束时L-F小于25 mm，因此1岁时L-F可能不是像以前所认为的那样，是强突突招募的主要先兆。

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