Larviposition site selection mediated by volatile semiochemicals inGlossina palpalis gambiensis
Larviposition site selection mediated by volatile semiochemicals inGlossina palpalis gambiensis
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DOI：
10.1111/een.12962
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发表时间：
2020-10-16
影响因子：
2.2
通讯作者：
Bouyer, Jeremy
中科院分区：
文献类型：
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作者：
Geoffrey, Gimonneau;Ouedraogo, Romaric;Bouyer, Jeremy
1.采采蝇（双翅目：舌蝇科）是K-策略物种和存款一个单一的幼虫在10天的时间间隔在特定的网站。由于幼虫产卵地点的选择强烈影响生殖成功，幼虫产卵地点的选择不太可能是随机的，将受到强选择性的过程，可能介导的特定线索。2.本研究旨在评估触须组中是否存在聚集效应，并测试其潜在的化学性质（接触或挥发性化合物）。根据寄主中是否存在同种和异种幼虫（Morsitans类群），研究了大颚叶蝉Glossina palis gambiensis的产卵地选择。使用单独或分组的妊娠雌性动物进行三组实验，并使用或不使用物理接触基质。3.在单独的幼虫实验中，雌虫更倾向于选择埋有幼虫的托盘，而不是未经处理的沙子（分别为63.2%和36.8%;P < 0.05）。在有基质接触的分组实验中，雌虫在同种（40%）或异种（33%）幼虫埋置的托盘中产卵的可能性高于在无条件的沙子（22%）或空托盘（5%）中产卵的可能性（P < 0.05）。在无基质接触的情况下，结果相似，但更多的腐殖酸沉积在空托盘中（19%）。4.这些结果为幼虫在G. P. gambiensisand认为幼虫位置选择是由幼虫或蛹起源的挥发性化学信息素介导的。然而，这种幼虫聚集似乎并不具有物种特异性，因此为这些载体的行为操纵提供了新的选择。
1. Tsetse flies (Diptera: Glossinidae) are K-strategist species and deposit a single larva at 10-day intervals in specific sites. As larviposition site selection strongly impacts reproductive success, the selection of larviposition sites is unlikely to be random and will be subject to strong selective processes, probably mediated by specific cues. 2. This study was designed to assess the existence of an aggregation effect in the palpalis group and to test its potential chemical nature (contact or volatile compounds). The larviposition site selection ofGlossina palpalis gambiensiswas studied according to the presence of conspecific and heterospecific larvae (morsitans group) buried in substrates. Three sets of experiments were performed with either individual or grouped gravid females and with or without physical access to the substrate. 3. In individual larviposition experiments, females were more likely to select trays with buried larvae than unconditioned sand (63.2% and 36.8%, respectively;P < 0.05). In the grouped experiment with substrate contact, females were more likely to larviposit in trays with conspecific (40%) or heterospecific (33%) buried larvae than in unconditioned sand (22%) or empty trays (5%;P < 0.05). The results were similar without substrate contact, but more pupae were deposited in empty trays (19%). 4. These results provide the first evidence for larval aggregation inG. p. gambiensisand suggest that larviposition site selection is mediated by volatile semiochemicals of larval or pupal origin. However, this larval aggregation does not seem to be species specific and therefore offers new options for the behavioural manipulation of these vectors.