Comparing five species of pipefish, egg size was significantly larger in species with brood pouches (Syngnathus typhle, Syngnathus acus and Syngnathus rostellatus) than in species without brood pouches (Entelurus aequoreus and Nerophis ophidion). Egg
size correlated positively with female body size in species with brood pouches, but was similar across female sizes in the species lacking pouches. These results may reflect differences in offspring competition as a consequence of variable offspring relatedness within a brood, due to the mating
systems adopted by the different species and the presence or absence of a brood pouch.
No Supplementary Data
Document Type: Editorial
Department of Ecology and Genetics/Animal Ecology, Uppsala University, Norbyvägen 18D, SE-75236 Uppsala, Sweden
Department of Zoology, University of Gothenburg, Box 463, SE-40530 Gothenburg, Sweden
Publication date: 2011-06-01