Strategic larval decision-making in a bivoltine butterfly.
Strategic larval decision-making in a bivoltine butterfly.
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DOI：
10.1007/s00442-011-2238-z
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发表时间：
2012-07
期刊：
影响因子：
2.7
通讯作者：
Wiklund, Christer
中科院分区：
文献类型：
--
作者：
Friberg, Magne;Dahlerus, Josefin;Wiklund, Christer
关键词：
在温带地区，昆虫幼虫必须决定是进入冬季滞育还是直接发育并在同一季节繁殖。长日照和高温促进直接发育，这通常与更高的生长速率有关。在这项工作中，我们研究了幼虫的路径决定是否先于调整的增长率（国家独立），或路径决定是否是有条件的个人的增长率（国家依赖），在蝴蝶粉蝶。该物种通常在倒数第二龄进行路径决定。我们测量了两个日长下整个幼虫发育的生长速率：略短和略长于临界日长。结果表明，该途径的决定既可以是状态独立的，也可以是状态依赖的，在短日照条件下，大多数幼虫进入滞育，只有一小部分早龄期的幼虫选择直接发育;在长日照条件下，多数幼虫直接发育，滞育途径只由一小部分生长缓慢的个体选择。在其余的，路径的选择是独立的早期生长速度，进入滞育下的短日照下的幼虫生长一样快，或更快的直接开发下的长日照下的早期龄期，而直接开发的增长速度比滞育只有在最终的年龄。因此，在具有非常高或非常低的生长速率的子集中，路径决定是状态依赖的，而在大多数幼虫中，该决定是状态独立的，这使得生长速率调整在路径决定的下游。
In temperate areas, insect larvae must decide between entering winter diapause or developing directly and reproducing in the same season. Long daylength and high temperature promote direct development, which is generally associated with a higher growth rate. In this work, we investigated whether the larval pathway decision precedes the adjustment of growth rate (state-independent), or whether the pathway decision is conditional on the individual’s growth rate (state-dependent), in the butterfly Pieris napi. This species typically makes the pathway decision in the penultimate instar. We measured growth rate throughout larval development under two daylengths: slightly shorter and slightly longer than the critical daylength. Results indicate that the pathway decision can be both state-independent and state-dependent; under the shorter daylength condition, most larvae entered diapause, and direct development was chosen exclusively by a small subset of larvae showing the highest growth rates already in the early instars; under the longer daylength condition, most larvae developed directly, and the diapause pathway was chosen exclusively by a small subset of slow-growing individuals. Among the remainder, the choice of pathway was independent of the early growth rate; larvae entering diapause under the short daylength grew as fast as or faster than the direct developers under the longer daylength in the early instars, whereas the direct developers grew faster than the diapausers only in the ultimate instar. Hence, the pathway decision was state-dependent in a subset with a very high or very low growth rate, whereas the decision was state-independent in the majority of the larvae, which made the growth rate adjustment downstream from the pathway decision.
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影响因子：
2.2
作者：
Goehring, L;Oberhauser, KS
通讯作者：
Oberhauser, KS
影响因子：
2.2
作者：
EIZAGUIRRE, M;LOPEZ, C;ALBAJES, R
通讯作者：
ALBAJES, R
影响因子：
10.1
作者：
Gotthard, Karl
通讯作者：
Gotthard, Karl
影响因子：
4.8
作者：
Jones, CG;Lawton, JH;Shachak, M
通讯作者：
Shachak, M
影响因子：
3.4
作者：
Gotthard, K;Nylin, S;Wiklund, C
通讯作者：
Wiklund, C