title: Reproductive parameters of common carp (Cyprinus carpio L) spawners during natural season and out-of-season spawning.
abstract: Common carp spawning characteristics were compared between season and out-of-season periods. There were no differences in the percentage of ovulation, spermatozoa motility and embryo survival to the eyed-egg-stage between the spawning periods. Fish spawned during the season produced oocytes of higher total weight than those spawned out-of-season. On the day exogenous feeding began, larvae obtained in out-of-season spawning were shorter than those obtained during the spawning season. However, the out-of-season larvae started feeding two days earlier than in-season larvae. As a result, seven days after fertilization, larvae obtained during out-of-season had the same length as larvae obtained during season. It appears to be possible to obtain common carp larvae half a year before the natural spawning period without decreasing the quality of gametes and larvae.
authors.affiliation: Department of Lake & River Fisheries, University of Warmia and Mazury in Olsztyn, 5 Oczapowskiego St., 10-718 Olsztyn-Kortowo, Poland. darekk@uwm.edu.pl
authors.forename: Dariusz
authors.initials: D
authors.lastname: Kucharczyk
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Targońska
authors.forename: Piotr
authors.initials: P
authors.lastname: Hliwa
authors.forename: Piotr
authors.initials: P
authors.lastname: Gomułka
authors.forename: Maciej
authors.initials: M
authors.lastname: Kwiatkowski
authors.forename: Sławomir
authors.initials: S
authors.lastname: Krejszeff
authors.forename: Jacek
authors.initials: J
authors.lastname: Perkowski
mesh_terms: D000818:Animals; D002347:Carps / Q000196:embryology / Q000502:physiology*; D005260:Female; D007814:Larva / Q000254:growth & development; D008297:Male; D010060:Ovulation / Q000502:physiology; D012098:Reproduction / Q000502:physiology*; D012621:Seasons; D013081:Sperm Motility / Q000502:physiology