Overlap between suitable nursery grounds for Japanese anchovy (Engraulis japonicus) and Japanese sardine (Sardinops melanostictus) larvae
Overlap between suitable nursery grounds for Japanese anchovy (Engraulis japonicus) and Japanese sardine (Sardinops melanostictus) larvae
复制标题
日本鳀鱼 (Engraulis japonicus) 和日本沙丁鱼 (Sardinops melanostictus) 幼虫的适宜苗圃地重叠
DOI：
10.1002/aff2.39
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Komatsu Kosei
中科院分区：
文献类型：
--
作者：
Nishikawa Haruka;Itoh Sachihiko;Yasuda Ichiro;Komatsu Kosei
日本凤尾鱼（Engraulis japonicus）和日本沙丁鱼（Sardinops melanostictus）的一些产卵和苗圃区域在空间和时间上都有重叠。沙丁鱼的产卵地重叠比大于凤尾鱼。许多沙丁鱼幼虫不可避免地与凤尾鱼幼虫共享栖息地。然而，种间相互作用只在沙丁鱼和凤尾鱼之间发现。重点是重叠合适的苗圃来解释这种单向的种间相互作用。适宜的苗圃是指幼虫生长较快的地方。如果一个同时有凤尾鱼和沙丁鱼的地区有一个只适合沙丁鱼生长的特定环境条件，那么在那里，沙丁鱼比凤尾鱼更容易生存。结合耳石分析和后向颗粒跟踪实验，估计了生长速率的适宜条件。考虑两种物种的理想生存条件，估算了两种物种和各物种的适宜生长面积。在重叠产卵期，凤尾鱼适宜苗圃的重叠比例高于沙丁鱼。基于这些结果，我们提出了以下假设。虽然凤尾鱼和沙丁鱼幼虫生长在同一地区，但该地区往往只适合沙丁鱼幼虫生长。在食物资源有限的情况下，快速生长有利于种间竞争。这一假说可以解释沙丁鱼与凤尾鱼之间的单向种间相互作用。
Some areas of the spawning and nursery grounds of Japanese anchovy (Engraulis japonicus) and Japanese sardine (Sardinops melanostictus) overlap both spatially and temporally. The sardine's spawning ground overlap ratio is greater than that of the anchovy. Many sardine larvae inevitably share their habitat with anchovy larvae. However, the interspecific interaction is found only from sardine to anchovy. The focus was on overlapping suitable nursery grounds to explain this unidirectional interspecific interaction. Suitable nursery grounds are defined as the areas where larvae grow faster. If an area with both anchovy and sardine has a specific environmental condition suitable only for sardine growth, sardine will survive there more easily than the anchovy. Suitable conditions based on growth rates were obtained from a combination of otolith analyses and backward particle tracking experiments were estimated. The sizes of suitable areas for each species and both species were estimated considering the ideal conditions for both species. The overlap ratio for suitable anchovy nursery grounds was higher than for sardine during the overlapping spawning period. Based on these results, the following hypotheses were proposed. Although anchovy and sardine larvae occur in the same area, the area is often suitable only for sardine larvae growth. Rapid growth works advantageously regarding interspecific competition as long as food resources are limited. This hypothesis can explain the one‐way interspecific interaction from sardine to anchovy.