Effects of extracellular environments on the motility of spermatozoa in several marine sculpins with internal gametic association |
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| Affiliation: | 1. Department of Biology, Faculty of Fisheries, Hokkaido University, Hakodate 041, Japan (Tel. 0138-41-0131; Fax 0138-43-5015);3. Sesoko Marine Science Center, University of the Ryukyus, Motobu-cho, Okinawa 095-02, Japan (Tel. 0980-47-2888; Fax 0980-47-4919);1. Lyon-Ortho-Clinic, Clinique de la Sauvegarde, Ramsay Santé, Lyon, France;2. ReSurg SA, Nyon, Switzerland;1. Tianjin Key Laboratory of Clean Energy and Pollutant Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China;2. National Supercomputer Center in Tianjin, Tianjin 300457, China;3. School of Chemistry and Chemical Engineering, National Engineering Research Center for Colloidal Materials, Shandong University, Jinan 250100, China;1. Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China;2. Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China;3. School of Engineering, Zhejiang Agricultural and Forestry University, Lin’an 311300, China;1. Department of Ocean Sciences (OSC), Memorial University, St. John׳s, Newfoundland and Labrador, Canada;2. Society for the Exploration & Valuing of the Environment (SEVE), St. Philips, Newfoundland and Labrador, Canada |
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| Abstract: | - 1.1. The motility of spermatozoa in several marine sculpins, which exhibit a special reproductive manner of the internal gametic association, was measured in various artificial solutions, ovarian fluid and seminal plasma.
- 2.2. In the elkhorn sculpin, Alcichthys alcicornis, spermatozoa showed high motility in solutions of 300 to 400 mOsm/kg, containing sodium ion, with pH higher than 7.5, which coincided with the nature of ovarian fluid of the fish.
- 3.3. Spermatozoa of sunrise sculpin, Pseudoblennius cottoides, and elegant sculpin, Bero elegans, were motile at osmolalities isotonic to the ovarian fluid but not at osmolalities higher than 500 and 800 mOsm/kg, respectively, indicating that the gametic association in these fish is carried out exclusively in their ovaries.
- 4.4. Spermatozoa of littledragon sculpin, Blepsias cirrhosus, were motile at osmolalities higher than 300 mOsm/kg, but not in sea water, suggesting an internal gametic association to occur in this species of sculpins.
- 5.5. The results indicate that spermatozoa of the marine sculpins with the internal gametic association show their motility in environmental conditions appropriate to respective reproductive modes.
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