Bathymetric gradients of fecundity and egg size in fishes: A Mediterranean case study
MetadataShow full item record
AuthorsFernandez-Arcaya, U. (Ulla); Drazen, J.C. (Jeffrey C.); Murua, H. (Hilario); Ramirez-Llodra, E. (Eva); Bahamon, N. (Nixon); Recasens, L. (Laura); Rotllant, G. (Guiomar); Company, J.B. (Joan B.)
There is a general hypothesis that species inhabiting deep-sea waters have lower fecundity and larger eggs than shallower species. However, there are few comparative studies which explore this trend because of the complexity of sampling in deep waters, especially in fishes. We present here the first analysis of fecundity and egg size with depth along an isothermal environment. We calculate the relative fecundity and egg size of 11 species of demersal deep-sea fish from the western Mediterranean and included in our analyses published data for an additional 14 species from the same geographic area. The results show that the relative fecundity (eggs per g of individual) of the analyzed fishes slightly decreased along the bathymetric gradient, whereas egg size increased with depth. When the analysis was conducted including only species from the order Gadiformes, the most speciose group in the region and with the widest depth range of distribution (50–2000 m), there was no relationship between ...
The following license files are associated with this item: