caa a22 4500 477115551 CHVBK 20180405111621.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00005009 doi (NATIONALLICENCE)springer-10.1007/BF00005009 On the mechanism of sperm release in three gobiid fishes (Teleostei: Gobiidae) [Elektronische Daten] [Andrea Marconato, Maria Rasotto, Carlotta Mazzoldi] Synopsis: In fish, gamete release is commonly assumed to be synchronous in externally inseminating fishes. By collecting and counting the number of sperm and eggs released during separate matings in three demersal spawners, the mediterranean gobies, Zosterisessor ophiocephalus, Gobius niger, and Knipowitschia panizzae, we observed that gametes are released asynchronously. Males release sperm before females start laying their eggs. Sperm is released in the form of sperm trails laid on the nest surface; subsequently active spermatozoa leave the trails and move in the water for several minutes. Sperm trails consist of bands of viscous material in which sperm is embedded. In most cases eggs are not laid directly over the sperm trail, suggesting that sperm may contact the eggs after the latter are released in the water. Male sperm duct glands, seminal vesicles, known to secrete mucosubstances, are likely involved in the production of sperm trails. The possible influence of this mode of insemination on the mating style of marine gobies is discussed. Kluwer Academic Publishers, 1996 Fertilization nationallicence Insemination nationallicence Seminal vesicles nationallicence Reproductive behavior nationallicence Mediterranean nationallicence Marconato Andrea Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut Rasotto Maria Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut Mazzoldi Carlotta Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 321-327 0378-1909 46:3<321 1996 46 10641 https://doi.org/10.1007/BF00005009 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005009 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Marconato Andrea Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut NATIONALLICENCE 700 1- Rasotto Maria Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut NATIONALLICENCE 700 1- Mazzoldi Carlotta Dipartimento di Biologia, Università di Padova, 35100, Padova, Italy aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 321-327 0378-1909 46:3<321 1996 46 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer