Common dolphinfish, Coryphaena hippurus, spawn at their easternmost Atlantic range adjacent to the Mediterranean Sea.

We provide sound evidence of common dolphinfish (Coryphaena hippurus) spawning activity in the Gulf of Cadiz (SW Spain) during summer months. Along with waters off Ivory Coast, this area adjacent to the Mediterranean Sea is the easternmost Atlantic spawning ground documented for the species. All the fish analysed (5 males and 15 females) were at spawning stage, except the smallest female (61.5 cm in fork length), which might not have yet reached sexual maturation. The oceanographic conditions during the samplings were similar to those occurring during the peak spawning season in the Gulf of Mexico. Our results are consistent with recent genetic studies indicating differentiation between Mediterranean and Atlantic dolphinfish populations, the Strait of Gibraltar representing a boundary between two distinct reproductive units. The present results may contribute to improve the understanding of dolphinfish population dynamics and the management of eastern Atlantic and Mediterranean stocks. This article is protected by copyright. All rights reserved.

[1]  F. Andaloro,et al.  Historical separation and present-day structure of common dolphinfish (Coryphaena hippurus) populations in the Atlantic Ocean and Mediterranean Sea , 2018, ICES Journal of Marine Science.

[2]  B. Mourre,et al.  Pelagic habitat and offspring survival in the eastern stock of Atlantic bluefin tuna , 2018, ICES Journal of Marine Science.

[3]  K. M. Koya,et al.  Reproductive biology and feeding habits of the common dolphinfish Coryphaena hippurus (Linnaeus, 1758) off Saurashtra coast, India , 2018, Indian Journal of Fisheries.

[4]  M. Grosell,et al.  Capture, transport, prophylaxis, acclimation, and continuous spawning of mahi-mahi (Coryphaena hippurus) in captivity. , 2017 .

[5]  K. N’da,et al.  Étude de quelques paramètres de la reproduction de Coryphaena hippurus ( Linnaeus , 1758) de la ZEE ivoirienne (Côte d’Ivoire) , 2017 .

[6]  S. Huh,et al.  Larval distribution of the common dolphinfish Coryphaena hippurus Linnaeus, 1758 (Coryphaenidae) in the East Sea/Sea of Japan , 2017 .

[7]  M. Vinodkumar,et al.  Observations on the food preferences, growth parameters and biological aspects of Coryphaena hippurus Linnaeus, 1758 exploited through the longline survey operations along the West coast of India , 2017 .

[8]  Sabrina Lo Brutto,et al.  The Mediterranean Sea hosts endemic haplotypes and a distinct population of the dolphinfish Coryphaena hippurus Linnaeus, 1758 (Perciformes, Coryphaenidae) , 2017 .

[9]  Vinod Kumar.  Observations on the food preferences, growth parameters and biological aspects of Coryphaena hippurus Linnaeus, 1758 exploited through the longline survey operations along the West coast of India , 2017 .

[10]  E. M. Abdussamad,et al.  Fishery, diet composition and reproductive biology of the dolphinfish Coryphaena hippurus (Linnaeus, 1758) off Karnataka, south-west coast of India , 2016 .

[11]  L. Bargelloni,et al.  RAD SNP markers as a tool for conservation of dolphinfish Coryphaena hippurus in the Mediterranean Sea: Identification of subtle genetic structure and assessment of populations sex-ratios. , 2016, Marine genomics.

[12]  P. Schembri,et al.  Age, Growth and Reproduction of Coryphaena hippurus (Linnaeus, 1758) in Maltese Waters, Central Mediterranean , 2015 .

[13]  S. Cailleau,et al.  The MyOcean IBI Ocean Forecast and Reanalysis Systems: operational products and roadmap to the future Copernicus Service , 2015 .

[14]  J. Rooker,et al.  Habitat associations of dolphinfish larvae in the Gulf of Mexico , 2014 .

[15]  F. Hazin,et al.  Reproductive biology of dolphinfish, Coryphaena hippurus (Actinopterygii: Coryphaenidae), in Saint Peter and Saint Paul Archipelago, Brazil , 2014 .

[16]  A. Boustany,et al.  Dolphinfish (Coryphaena hippurus) distribution in relation to biophysical ocean conditions in the northwest Atlantic , 2014 .

[17]  R. Appeldoorn,et al.  Movements of dolphinfish (Coryphaena hippurus) along the U.S. east coast as determined through mark and recapture data , 2014 .

[18]  T. Shiraishi,et al.  Age, growth, and reproductive characteristics of dolphinfish Coryphaena hippurus in the waters off west Kyushu, northern East China Sea , 2012, Fisheries Science.

[19]  D. Snodgrass,et al.  An indeterminate model to estimate egg production of the highly iteroparous and fecund fish, dolphinfish (Coryphaena hippurus) , 2012 .

[20]  S. Ortega‐García,et al.  Reproductive dynamics of the common dolphinfish Coryphaena hippurus in the southern Gulf of California , 2011 .

[21]  I. Salgado-Ugarte,et al.  Sex ratios, size at sexual maturity, and spawning seasonality of dolphinfish (Coryphaena hippurus) captured in the Gulf of Tehuantepec, Mexico , 2011 .

[22]  J. Durand,et al.  Global phylogeography of the dolphinfish (Coryphaena hippurus): the influence of large effective population size and recent dispersal on the divergence of a marine pelagic cosmopolitan species. , 2010, Molecular phylogenetics and evolution.

[23]  J. Buckel,et al.  Age, growth, and reproduction of dolphinfish (Coryphaena hippurus) caught off the coast of North Carolina , 2005 .

[24]  F. Abascal,et al.  Stereological assessment of the reproductive status of female Atlantic northern bluefin tuna during migration to Mediterranean spawning grounds through the Strait of Gibraltar , 2002 .

[25]  T. Kawasaki,et al.  Reproductive biology of the dolphin fish Corphaena hippurus on the east coast of Taiwan , 2001 .

[26]  J. Lasso,et al.  Fisheries and biology of Coryphaena hippurus (Pisces: Coryphaenidae) in the Pacific coast of Colombia and Panama , 1999 .

[27]  A. Potoschi,et al.  Sexual development, maturity and reproduction of dolphinfish ( Coryphaena hippurus ) in the western and central Mediterranean , 1999 .

[28]  F. Arocha,et al.  The fishery, demographic size structure and oocyte development of dolphinfish, Coryphaena hippurus, in Venezuela and adjacent waters* , 1999 .

[29]  B. Morales-Nin,et al.  Differences between the sagitta, lapillus and vertebra in estimating age and growth in juvenile Mediterranean dolphinfish ( Coryphaena hippurus ) , 1999 .

[30]  H. Oxenford.  Biology of the dolphinfish ( Coryphaena hippurus ) in the western central Atlantic: a review , 1999 .

[31]  E. Massutí,et al.  First record of larval stages of Coryphaena hippurus (Pisces: Coryphaenidae) in the Mediterranean Sea* , 1998 .

[32]  B. Morales-Nin,et al.  Reproductive biology of dolphin-fish (Coryphaena hippurus L.) off the island of Majorca (western Mediterranean) , 1997 .

[33]  B. Morales-Nin,et al.  Seasonality and reproduction of dolphin-fish (Coryphaena hippurus) in the Western Mediterranean , 1995 .

[34]  W. J. Richards,et al.  Synopsis of the biological data on Dolphin-Fishes, Coryphaena hippurus Linnaeus and Coryphaena equiselis Linnaeus , 1982 .

[35]  M. Soichi.  Spawning Behavior of the Dolphin, Coryphaena hippurus, in the Aquarium and Its Eggs and Larvae , 1978 .

[36]  J. V. Bannister.  The length‐weight relationship, condition factor and gut contents of the dolphin‐fish Coryphaena hippurus (L.) in the Mediterranean , 1976 .

[37]  W. W. Hassler,et al.  Food Habits and Sex Ratios of Dolphin Coryphaena hippurus Captured in the Western Atlantic Ocean off Hatteras, North Carolina , 1974 .

[38]  G. L. Beardsley.  Age, growth, and reproduction of the dolphin, Coryphaena hippurus, in the straits of Florida , 1967 .

[39]  B. Newell,et al.  Notes on the biology of the dorade or dolphin-fish (Coryphaena hippurus) in East African waters. , 1957 .