Ludwig Adam N, Walsh Patrick J
Division of Marine Biology and Fisheries, NIH NCRR National Resource for Aplysia, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA.
Biol Bull. 2008 Dec;215(3):265-71. doi: 10.2307/25470710.
Aplysia californica, a simultaneous hermaphrodite, has the ability to store and digest allosperm and frequently mates with multiple partners. Using controlled matings and behavioral observations, we characterized the mating behavior of multiply-mated A. californica. Regardless of their initial mating role, all animals mated a second time. Individuals acting as the initial sperm donor showed no preference for second mating role when paired with a "virgin" partner. However, individuals acting as the initial sperm recipient showed a highly significant preference for acting as the sperm donor in subsequent matings, when paired with a "virgin" partner. This preference disappeared when the initial sperm recipient spawned a fertilized egg mass prior to the second mating bout. On average, singly mated animals laid 2.85 +/- 0.39 (mean +/- SE, n = 13) egg masses before accepting sperm from a second donor. These results support the notion that depletion of stored allosperm plays a crucial role in the resolution of sexual conflict and the mating decisions of A. californica.
加州海兔是一种雌雄同体生物，能够储存和消化异体精子，并且经常与多个伴侣交配。通过控制交配和行为观察，我们对多次交配的加州海兔的交配行为进行了特征描述。无论其最初的交配角色如何，所有动物都会进行第二次交配。当与“未交配过的”伴侣配对时，最初作为精子供体的个体对第二次交配角色没有偏好。然而，最初作为精子受体的个体在与“未交配过的”伴侣配对时，在随后的交配中表现出非常显著的作为精子供体的偏好。当最初的精子受体在第二次交配回合之前产下受精卵团时，这种偏好就消失了。平均而言，单次交配的动物在接受第二个供体的精子之前产下了2.85±0.39（平均值±标准误，n = 13）个卵团。这些结果支持了这样一种观点，即储存的异体精子的消耗在解决性冲突和加州海兔的交配决策中起着至关重要的作用。
