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The life cycle of the Atlantic Beach-Cricket, Pseudomogoplistes vicentae Gorochov, 1996
Journal of Insect Conservation ( IF 1.9 ) Pub Date : 2019-11-05 , DOI: 10.1007/s10841-019-00187-1
Karim Vahed

The Atlantic Beach-Cricket, Pseudomogoplistes vicentae, inhabits shingle beaches, with a range that extends from the UK to the Canary Islands. Little is known about the natural history of this species, which is listed by the IUCN as Vulnerable. In the present study, a combination of field sampling (by pitfall trapping and direct searching) in spring, summer, autumn and late winter at two different sites in the UK, together with culturing eggs and nymphs in captivity, was used to determine the life cycle. Eggs laid in August in captivity showed no visible embryonic development until May and hatched the following July. There was no difference in the time taken to hatch between eggs maintained over winter at either 4 or 11 °C. Nymphal instars present in the field indicated that the majority of eggs hatch from June to early August. From October to February in the field, the majority of nymphs were estimated to be at the 7th instar. Development appeared to resume by April and nymphs reached adulthood by July to August in the field, two years after the eggs from which they hatched were likely to have been laid. The number of nymphal instars ranged from 10 to 11 (mode: 11) in males and 11 to 13 (mode: 12) in females. In captivity, most adult males died by the end of November, while 35% of females survived until March. Females preferred to oviposit in driftwood rather than in sand in the laboratory. This fact, together with the early embryonic diapause, suggests that the species might be able to disperse by rafting at the egg stage.

中文翻译:

大西洋海滩蟋蟀的生命周期,Pseudomogoplistes vicentae Gorochov,1996

大西洋海滩蟋蟀(Pseudomogoplistes vicentae)栖息在鹅卵石海滩,范围从英国延伸到加那利群岛。人们对该物种的自然历史知之甚少,它被 IUCN 列为易危物种。在本研究中,结合在英国两个不同地点春季、夏季、秋季和晚冬的实地采样(通过陷阱捕获和直接搜索),以及人工养殖的​​卵和若虫,被用来确定生活循环。8 月圈养产下的卵直到 5 月才显示出可见的胚胎发育,并于次年 7 月孵化。在 4°C 或 11°C 温度下过冬的鸡蛋孵化时间没有差异。田间若虫龄表明大部分卵在 6 月至 8 月初孵化。从10月到2月在田间,估计大多数若虫在7龄。发育似乎在 4 月恢复,若虫在 7 月至 8 月在田间成年,这是它们孵化的卵可能已经产下两年后。若虫龄雄性为10~11(众数:11),雌性为11~13(众数:12)。在圈养中,大多数成年雄性在 11 月底死亡,而 35% 的雌性存活到 3 月。女性更喜欢在浮木中而不是在实验室的沙子中排卵。这一事实,连同早期胚胎滞育,表明该物种可能能够通过在卵阶段漂流而分散。发育似乎在 4 月恢复,若虫在 7 月至 8 月在田间成年,这是它们孵化的卵可能已经产下两年后。若虫龄雄性为10~11(众数:11),雌性为11~13(众数:12)。在圈养中,大多数成年雄性在 11 月底死亡,而 35% 的雌性存活到 3 月。女性更喜欢在浮木中而不是在实验室的沙子中排卵。这一事实与早期胚胎滞育一起表明该物种可能能够通过在卵阶段漂流而分散。发育似乎在 4 月恢复,若虫在 7 月至 8 月在田间成年,这是它们孵化的卵可能已经产下两年后。若虫龄雄性为10~11(众数:11),雌性为11~13(众数:12)。在圈养中,大多数成年雄性在 11 月底死亡,而 35% 的雌性存活到 3 月。女性更喜欢在浮木中而不是在实验室的沙子中排卵。这一事实,连同早期胚胎滞育,表明该物种可能能够通过在卵阶段漂流而分散。大多数成年雄性在 11 月底死亡,而 35% 的雌性存活到 3 月。女性更喜欢在浮木中而不是在实验室的沙子中排卵。这一事实,连同早期胚胎滞育,表明该物种可能能够通过在卵阶段漂流而分散。大多数成年雄性在 11 月底死亡,而 35% 的雌性存活到 3 月。女性更喜欢在浮木中而不是在实验室的沙子中排卵。这一事实与早期胚胎滞育一起表明该物种可能能够通过在卵阶段漂流而分散。
更新日期:2019-11-05
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