Geographically and environmentally driven spawning distributions of tuna species in the western Mediterranean Sea Public Deposited

Downloadable Content

Download PDF


Attribute NameValues
  • The spawning habitats of many large marine pelagic predators are poorly known. This lack of knowledge hampers conservation efforts that are aimed at identifying critical habitats for the spawning of these species. We hypothesized that phylogenetically related species show different adaptations and respond differently to environmental and geographical cues for when and where to spawn. We tested this hypothesis on a 5 yr data set (2001 to 2005) from the Balearic Islands region (Mediterranean Sea), targeting the early larval stage of 3 abundant species of tuna: bluefin tuna Thunnus thynnus, a large migratory oceanic species; albacore T. alalunga, a smaller species; and bullet tuna Auxis rochei, often found closer to coastal areas. The spatial distribution of spawning locations at the regional scale differed for the 3 tuna species. Bluefin tuna relied heavily on environmental signals, and therefore their spawning habitats can vary depending on the environment. In contrast, the spawning habitat of albacore and bullet tuna was driven mostly by geography and was less variable over contrasting environmental conditions. These regional adaptations for spawning habitats among the 3 tuna species may play a critical role in offspring survival and species interactions, and should be taken into account when establishing conservation practices.
Resource Type
Date Available
Date Issued
  • Reglero P, Ciannelli L, Alvarez-Berastegui D, Balbín R, López-Jurado JL, Alemany F (2012) Geographically and environmentally driven spawning distributions of tuna species in the western Mediterranean Sea. Marine Ecology Progress Series 463:273-284
Journal Title
Journal Volume
  • 463
Academic Affiliation
Rights Statement
Funding Statement (additional comments about funding)
  • This study was funded by the Spanish Instituteof Oceanography, the Spanish Ministry of Science (BA -LEARES, 2009-07944 MAR), and the ICTS-SOCIB (Bluefinproject). A research stay of L.C. was supported by a UIBscholarship and ICTS-SOCIB. L.C. acknowledges furthersupport from NSF-CMG grant 0934961.
Peer Reviewed



This work has no parents.