Day Corey A, O'Meara George F, Pesko Kendra N, Nishimura Naoya, Byrd Brian D
Mosquito and Vector-Borne Infectious Disease Laboratory, College of Health and Human Sciences, Western Carolina University, Cullowhee, NC, 28723, U.S.A.
Florida Medical Entomology Laboratory, IFAS, University of Florida, Vero Beach, FL, 32962, U.S.A.
J Vector Ecol. 2020 Dec;45(2):197-203. doi: 10.1111/jvec.12390.
Mosquitoes have developed specialized oviposition strategies that allow them to develop in a wide variety of aquatic habitats. Environmentally cued hatching traits may also play an important role in the successful colonization of some larval habitats, but this subject has remained largely unexplored in Culicidae. Aedes atropalpus (Coquillett) is an autogenous rock pool specialist that may maintain unique adaptations for oviposition and egg hatching. We investigated the egg-laying strategies of Ae. atropalpus exposed to standard (non-diapausing) rearing conditions and diapause-inducing conditions and tested the impact of physical agitation on egg hatch rates by exposing floating and submerged eggs to physical agitation treatments. The results of the oviposition experiment indicate that Ae. atropalpus females primarily lay non-diapausing eggs directly onto the water surface and lay diapausing eggs directly on solid surfaces. The egg-hatching experiment demonstrated that physical agitation significantly increases Ae. atropalpus hatch rates. Floating and submerged eggs responded similarly to the agitation treatment. These data suggest that oviposition behaviors based on both egg diapause status and environmentally-cued hatching strategies may be important adaptations for Ae. atropalpus in riverine rock pools.
蚊子已经形成了专门的产卵策略，使它们能够在各种各样的水生栖息地中发育。环境诱导的孵化特性在一些幼虫栖息地的成功定殖中可能也起着重要作用，但在蚊科中，这个问题在很大程度上仍未得到探索。阿氏伊蚊（Coquillett）是一种自体产卵的岩石池专家，可能在产卵和卵孵化方面保持着独特的适应性。我们研究了暴露于标准（非滞育）饲养条件和诱导滞育条件下的阿氏伊蚊的产卵策略，并通过将漂浮和浸没的卵进行物理搅动处理，测试了物理搅动对卵孵化率的影响。产卵实验结果表明，阿氏伊蚊雌蚊主要将非滞育卵直接产在水面上，将滞育卵直接产在固体表面。卵孵化实验表明，物理搅动显著提高了阿氏伊蚊的孵化率。漂浮和浸没的卵对搅动处理的反应相似。这些数据表明，基于卵滞育状态和环境诱导孵化策略的产卵行为可能是阿氏伊蚊在河流岩石池中重要的适应性特征。
