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PeerJ
2019 Jan 01;7:e7598. doi: 10.7717/peerj.7598.
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Transgenerational effects of UV-B radiation on egg size, fertilization, hatching and larval size of sea urchins Strongylocentrotus intermedius.
Ding J, Zhang L, Sun J, Shi D, Chi X, Yang M, Chang Y, Zhao C.
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Transgenerational effects are important for phenotypic plasticity and adaptation of marine invertebrates in the changing ocean. Ultraviolet-B (UV-B) radiation is an increasing threat to marine invertebrates. For the first time, we reported positive and negative transgenerational effects of UV-B radiation on egg size, fertilization, hatchability and larval size of a marine invertebrate. Strongylocentrotus intermedius exposed to UV-B radiation showed positive transgenerational effects and adaptation on egg size, hatching rate and post-oral arm length of larvae. Negative transgenerational effects were found in body length, stomach length and stomach width of larvae whose parents were exposed to UV-B radiation. Sires probably play important roles in transgenerational effects of UV-B. The present study provides valuable information into transgenerational effects of UV-B radiation on fitness related traits of sea urchins (at least Strongylocentrotus intermedius).
Figure 1. Conceptual diagram of larval size measurements.Letters a, b, c, d, e and f refer to larval length, larval width, stomach length, stomach width, postoral arm length and body rod length, respectively.
Figure 2. Egg diameter of Strongylocentrotus intermedius used for mating groups A (♀0 × ♂0 μW · cm−2), B (♀20 × ♂20 μW · cm−2) and C (♀20 × ♂0 μW · cm−2).Different letters above the bars represent significant difference (P < 0.05) among experimental groups.
Figure 6. Body rod length (A), post-oral arm length (B) and body rod length/post-oral arm length (C) of Strongylocentrotus intermedius larvae among mating groups.Different letters above the bars represent significant difference (P < 0.05) among experimental groups.
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