caa a22 4500 606227830 CHVBK 20210128101200.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10641-014-0348-2 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0348-2 Relationship of egg and hatchling size to incubation temperature in the multiple-spawning fish Gnathopogon caerulescens (Honmoroko) [Elektronische Daten] [Takeshi Kikko, Takahiro Usuki, Daisuke Ishizaki, Yoshiaki Kai, Yasuhiro Fujioka] Egg size affects larval size, growth rate, survival and fecundity with maternal fitness being maximized by a trade-off between egg size and fecundity. Production of a small number of large eggs maximizes female fitness under poor food conditions, as does a large number of small eggs under rich food conditions. Gnathopogon caerulescens (Honmoroko) spawns over a wide range of water temperature from spring to summer. Thus, we determined whether or not egg size varied with water temperature and how egg size influenced hatchling size at different water temperature. Changes in egg size strongly correlated with seasonal changes in water temperature around the lake, regardless of time and area. An experiment using eggs from the lake indicated that hatchling size has a significant positive relationship with egg size in water temperatures of 24°C. On the other hand, a lower incubation temperature, similar to that likely to be encountered at the beginning of the spawning season, resulted in a smaller hatchling size, eggs requiring a longer time to hatch. At the beginning of the spawning season, therefore, egg size may have a lesser impact on hatching size in the natural environment of Honmoroko because of the relatively lower temperatures. Although fish larvae below a certain threshold of effective body size are generally not expected to have a high early survival rate due to, for example, a lower competitive ability or a high susceptibility to predation, seasonal egg size variation in Honmoroko may be adaptive so as to enhance the likehood of early survival by establishing an effective body size under changing water temperature conditions. Springer Science+Business Media Dordrecht, 2014 Egg size nationallicence Seasonal change nationallicence Hatchling size nationallicence Incubation temperature nationallicence Gnathopogon caerulescens nationallicence Kikko Takeshi Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut Usuki Takahiro Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut Ishizaki Daisuke Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut Kai Yoshiaki Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, 625-0086, Maizuru, Kyoto, Japan aut Fujioka Yasuhiro Lake Biwa Museum, 525-0001, Kusatsu, Shiga, Japan aut Environmental Biology of Fishes Springer Netherlands 98/4(2015-04-01), 1151-1161 0378-1909 98:4<1151 2015 98 10641 https://doi.org/10.1007/s10641-014-0348-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0348-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kikko Takeshi Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut NATIONALLICENCE 700 1- Usuki Takahiro Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut NATIONALLICENCE 700 1- Ishizaki Daisuke Shiga Prefectural Fisheries Experimental Station, 2138-3, Hassaka, 522-0057, Hikone, Shiga, Japan aut NATIONALLICENCE 700 1- Kai Yoshiaki Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, 625-0086, Maizuru, Kyoto, Japan aut NATIONALLICENCE 700 1- Fujioka Yasuhiro Lake Biwa Museum, 525-0001, Kusatsu, Shiga, Japan aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/4(2015-04-01), 1151-1161 0378-1909 98:4<1151 2015 98 10641