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Effects of temperature on somatic growth, otolith growth, and uncoupling in the otolith to fish size relationship of larval northern pike, Esox lucius L
Fisheries Research ( IF 2.4 ) Pub Date : 2020-12-26 , DOI: 10.1016/j.fishres.2020.105843
Dariusz P. Fey , Martyna Greszkiewicz

Verifying the link between somatic and otolith growth is crucial for a number of analyses that provide data on the ecology of early life stages of fish. In the current study, sagittal and lapillar otoliths were extracted from larval northern pike (n = 720) that were reared from eggs in RAS systems at three temperatures (10 °C, 15 °C, and 22 °C) for 28 days. The growth rate (SL at age) of larval northern pike was significantly dependent on rearing temperature with the highest rate observed at 22 °C (0.83 mm·d−1), a lower rate at 15 °C (0.48 mm·d−1), and the lowest at 10 °C (0.25 mm·d−1). The maximum value of growth observed for an individual larvae at a certain age was 1.28 mm·d−1. The higher somatic growth rate at higher temperatures was followed by faster lapillus and sagitta linear growth rates. Positive relationships between otolith growth and somatic growth were noted not only among temperatures but also within given temperatures. The sizes of lapilli and sagittae were strongly correlated with fish size, but both somatic growth and temperature had a statistically significant effect on those relationships. Magnitude of this phenomenon was however fish size dependent. We concluded that larval northern pike otoliths (both sagittae and lapilli) are a reliable source of information on somatic growth, and they can be used for increment trajectory width analysis and marginal otolith increment width analysis. However, if growth back-calculation is to be employed, it is recommended to consider the somatic growth and temperature effect on the fish size-otolith size relationship.



中文翻译:

温度对幼体北部梭子鱼Esox lucius L的体细胞生长,耳石生长以及耳石与鱼的大小关系的影响

验证体细胞和耳石生长之间的联系对于许多提供鱼类早期生命阶段生态数据的分析至关重要。在当前的研究中,从幼虫北部梭子鱼(n = 720)中提取矢状和幼虫耳石,并在三种温度(10°C,15°C和22°C)下将RAS系统中的卵饲养了28天。幼体北方斑鱼的生长速度(成年时的SL)明显取决于饲养温度,在22°C(0.83 mm·d -1)时观察到最高的生长速率,在15°C(0.48 mm·d -1时观察到较低的生长速度)),最低温度为10°C(0.25 mm·d -1)。在特定年龄观察到的单个幼虫的最大生长值为1.28 mm·d -1。在较高温度下较高的体细胞生长速率之后是更快的lapillus和矢状线虫线性生长速率。耳石生长与体细胞生长之间的正相关关系不仅在温度之间存在,而且在给定温度范围内也存在。lapilli和sagittae的大小与鱼的大小密切相关,但是体细胞的生长和温度对这些关系都有统计学意义的影响。但是,这种现象的严重程度取决于鱼的大小。我们得出的结论是,幼体北部长耳石耳石(既是射手虫又是青金石)是体细胞生长的可靠信息来源,它们可用于增量轨迹宽度分析和边缘耳石增量宽度分析。但是,如果要使用增长逆向计算,

更新日期:2020-12-26
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