有害甲藻 Karenia mikimotoi 对日本普通乌贼 Todarodes pacificus 的有害影响

IF 1.4 4区 农林科学 Q3 FISHERIES Fisheries Science Pub Date : 2024-08-02 DOI:10.1007/s12562-024-01805-x
Masafumi Natsuike, Jun Yamamoto, Tetsuya Konishi, Shunsuke Kimura, Masahiko Kitagawa, Kazuhiko Itaya
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引用次数: 0

摘要

日本普通鱿鱼Todarodes pacificus暴露于从函馆港赤潮事件中采集的引起赤潮的甲藻Karenia mikimotoi中24小时。暴露于最高 K. mikimotoi 细胞密度组的鱿鱼在暴露试验开始后 1 小时内开始沉入海底,该组出现异常(沉底或死亡)的频率明显高于其他组(经 Bonferroni 校正的 Wilcoxon 符号秩检验,P 值为 0.001)。鱿鱼死亡率的危险比受 K. mikimotoi 细胞密度的影响(Cox 比例危险模型;P 值为 0.01)。这些结果表明,K. mikimotoi 对日本普通鱿鱼有害,即使短期接触高密度的这种藻类也会导致衰弱和游泳能力丧失,从而导致死亡。K. mikimotoi 使日本普通鱿鱼衰弱和死亡,有可能导致其新鲜度下降和商业价值降低,赤潮事件期间就曾观察到这种情况。
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Detrimental effect of the harmful dinoflagellate Karenia mikimotoi on Japanese common squid Todarodes pacificus

Japanese common squid Todarodes pacificus was exposed to the red tide-causing dinoflagellate Karenia mikimotoi, collected from a red tide event in Hakodate Port, in seawater at four densities (0, 90, 320, and 1900 K. mikimotoicells mL−1) for 24 h. The number of squids that sunk to the bottom every hour and the survival of squids were recorded every 3 h. Squids in the group exposed to the highest cell density of K. mikimotoi began to sink to the bottom within 1 h of the start of the exposure test, and the frequency of anomalies (sinking or death) was significantly higher in this group than in the other groups (Wilcoxon signed-rank test with Bonferroni correction, P-values < 0.001). Hazard ratios for squid mortality were affected by K. mikimotoi cell density (Cox proportional hazards model; P-values < 0.01). These results suggest that K. mikimotoi is harmful to the Japanese common squid and that even short-term exposure to high densities of this alga causes debilitation and loss of swimming ability, leading to death. The debilitation and death of the Japanese common squid by K. mikimotoi has the potential to cause a loss of freshness and a decline in their commercial value, as has been observed during red tide events.

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来源期刊
Fisheries Science
Fisheries Science 农林科学-渔业
CiteScore
3.80
自引率
5.30%
发文量
0
审稿时长
12-24 weeks
期刊介绍: Fisheries Science is the official journal of the Japanese Society of Fisheries Science, which was established in 1932. Recognized as a leading journal in its field, Fisheries Science is respected internationally for the publication of basic and applied research articles in a broad range of subject areas relevant to fisheries science. All articles are peer-reviewed by at least two experts in the field of the submitted paper. Published six times per year, Fisheries Science includes about 120 articles per volume. It has a rich history of publishing quality papers in fisheries, biology, aquaculture, environment, chemistry and biochemistry, food science and technology, and Social Science.
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