文章基本信息

标题：Small fish eat smaller fish: A model of interaction strength in early life stages of two tuna species
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作者：Daniel Ottmann ; Patricia Reglero ; Francisco Alemany 等
期刊名称：Limnology and Oceanography Letters
电子版ISSN：2378-2242
出版年度：2022
卷号：7
期号：3
页码：227-234
DOI：10.1002/lol2.10241
语种：English
出版社：Wiley
摘要：Abstract Fish larvae are rarely a major driver of fish mortality, but tunas can produce large batches of larvae that rapidly develop the capacity to kill other fish. We combine a model for the killing potential from Atlantic bluefin tuna (BFT) larvae on larval albacore (ALB) with field observations at a major spawning ground. Both species spawn from June to August, but BFT has a narrow spawning peak at the beginning of the season that results in priority effects. Our model shows that, following a recent stock recovery, BFT larvae have increased their killing pressure, leaving areas of up to 1000 km2 with < 1% chance of ALB daily survival. Such increase in killing pressure suggests larval ALB has reduced chances to survive; yet in large areas with few BFT, other drivers of early survival prevail over BFT predation. This shows that strong predatory interactions can occur during larval stages in some fishes.