Journal
LIMNOLOGY AND OCEANOGRAPHY LETTERS
Volume 7, Issue 3, Pages 227-234Publisher
WILEY
DOI: 10.1002/lol2.10241
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Funding
- F. de la Gandara
- European Union [773713]
- Spanish Ministry of Economy and Competitiveness [CTM2011-29525-C04-02, CTM-2015-68473-R]
- Balearic Government [PDR2020/78]
- Spanish Institute of Oceanography (TUNIBAL)
- Balearic Islands Coastal Observing and Forecasting System (SOCIB) (BLUEFIN)
- FPI Fellowship from Vicepresidencia i Conselleria d'Innovacio, Recerca i Turisme of the regional Government of the Balearic Islands [2014-2020]
- European Social Fund program
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Tuna larvae have the capacity to kill other fish, particularly during the peak spawning season. However, in areas with few tuna, other factors contribute more to the survival of larval fish.
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 km(2) 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.
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