DIFFERENTIAL ALLOCATION OF RESOURCES UNDERLIES THE DISPERSAL-REPRODUCTION TRADE-OFF IN THE WING-DIMORPHIC CRICKET, GRYLLUS-RUBENS
DIFFERENTIAL ALLOCATION OF RESOURCES UNDERLIES THE DISPERSAL-REPRODUCTION TRADE-OFF IN THE WING-DIMORPHIC CRICKET, GRYLLUS-RUBENS
复制标题
DOI：
10.1007/bf00321201
复制
发表时间：
1993-02-01
期刊：
影响因子：
2.7
通讯作者：
ZERA, AJ
中科院分区：
文献类型：
--
作者：
MOLE, S;ZERA, AJ
蟋蟀，Gryllus rubens（直翅目，蟋蟀科），存在于自然种群中，作为一个完全有翼（LW），飞行能力的变体或作为一个短翼（SW）的变体，不能飞。SW型比LW型多产。在这项研究中，我们报告的生理基础，这种权衡飞行能力和繁殖力。重量饲养试验结果表明，LW型和SW型在食物消耗和消化方面是相当的。然而，在成虫阶段，LW型在将同化的营养物质转化为生物量方面效率较低。这可能是由于在LW形态中维持功能性飞行肌肉而导致同化营养素的呼吸损失的结果。在这两种变体中，用于飞行肌肉的总生物量在成体生长的前14天期间没有显着变化，而在同一时期卵巢组织质量中有显着的生物量增加。SW型有残留的飞行肌，并且相对于LW型获得更多的卵巢质量。这些数据是一致的权衡之间的飞行肌肉的维护LW形态和卵巢生长的SW形式。这是第一个证据，生活史的权衡，有一个生理基础，这是有限的分配获得和同化的营养物质在有机体。
The cricket, Gryllus rubens (Orthoptera, Gryllidae), exists in natural populations as either a fully-winged (LW), flight-capable morph or as a short-winged (SW) morph that cannot fly. The SW morph is substantially more fecund than the LW morph. In this study we report on the physiological basis of this trade-off between flight capability and fecundity. Results from gravimetric feeding trials indicate that LW and SW morphs are equivalent in their consumption and digestion of food. However, during the adult stage, the LW morph is less efficient in converting assimilated nutrients into biomass. This may be a consequence of the respired loss of assimilated nutrients due to the maintenance of functional flight muscles in the LW morph. In both morphs the gross biomass devoted to flight muscles does not change significantly during the first 14 days of adult growth while there is a significant biomass gain in ovarian tissue mass during the same period. SW morphs have vestigial flight muscles and gain substantially more ovarian mass relative to the LW morphs. These data are consistent with a trade-off between flight muscle maintenance in the LW morph and ovarian growth in the SW form. This is the first evidence for a life-history trade-off that has a physiological basis which is limited to the allocation of acquired and assimilated nutrients within the organism.