Sperm precedence and sperm storage in multiply mated red flour beetles

1998 ◽  
Vol 43 (6) ◽  
pp. 365-369 ◽  
Author(s):  
Sara M. Lewis ◽  
Emily Jutkiewicz
PLoS ONE ◽  
2012 ◽  
Vol 7 (12) ◽  
pp. e53356 ◽  
Author(s):  
Andrew W. Ridley ◽  
Seymour Magabe ◽  
David I. Schlipalius ◽  
Michelle A. Rafter ◽  
Patrick J. Collins

Heredity ◽  
1994 ◽  
Vol 73 (2) ◽  
pp. 155-159 ◽  
Author(s):  
Theresa Robinson ◽  
Norman A Johnson ◽  
Michael J Wade

1990 ◽  
Vol 122 (6) ◽  
pp. 1187-1191 ◽  
Author(s):  
N.D.G. White ◽  
R.N. Sinha

AbstractExposure of adult rusty grain beetles, Cryptolestes ferrugineus (Stephens), saw-toothed grain beetles, Oryzaephilus surinamensis (L.), and red flour beetles, Tribolium castaneum (Herbst), to filter papers treated with the organophosphorus insecticides malathion or chlorpyrifos-methyl often affected offspring production in survivors. Groups of five male and five female survivors were placed on ground wheat at 30°C and C. ferrugineus and O. surinamensis adults produced fewer offspring with prolonged exposure to chlorpyrifos-methyl; malathion had no effect. Tribolium castaneum adults produced significantly more offspring with increasing exposure to both malathion and chlorpyrifos-methyl indicating stimulation of oviposition or a selection for increased fitness in survivors.


2018 ◽  
Vol 5 (3) ◽  
pp. 172195 ◽  
Author(s):  
Clelia Gasparini ◽  
Emma Daymond ◽  
Jonathan P. Evans

The storage of sperm by females across successive reproductive cycles is well documented in internal fertilizers, yet the fate of stored sperm when they compete with ‘new’ sperm to fertilize a female's eggs has rarely been considered. This gap in our understanding is likely due to the logistical difficulties of controlling behavioural interactions during or after mating, which in turn may influence how many sperm are inseminated and how stored sperm are ultimately used during successive bouts of sperm competition with freshly inseminated sperm. Here, we use artificial insemination (AI) in guppies ( Poecilia reticulata ), a polyandrous live-bearing poeciliid fish exhibiting prolonged sperm storage by females, to overcome these challenges. The use of AI enables us to control potential differential maternal effects (e.g. behaviourally mediated cryptic female choice) and specifically test for post-copulatory paternity biases that favour either stored or fresh sperm when they compete to fertilize eggs. Our paternity analyses revealed the almost complete dominance of freshly inseminated sperm over stored sperm, supporting previous studies reporting similar patterns following natural matings across successive brood cycles. However, our use of AI, which excluded behavioural interactions between males and females, most likely generated a far stronger pattern of fresh sperm precedence compared with those reported in previous studies, possibly implicating ‘cryptic' forms of selection by females that may sometimes bolster the success of stored sperm.


2014 ◽  
Vol 92 (1) ◽  
pp. 33-40 ◽  
Author(s):  
Christopher R. Friesen ◽  
Robert T. Mason ◽  
Stevan J. Arnold ◽  
Suzanne Estes

Long-term sperm storage may contribute to postcopulatory sexual selection because it enhances the commingling of sperm from different males within the female reproductive tract, which is the prerequisite for sperm competition. Long-term sperm storage and multiple paternity has been documented in snakes, but the identity of the last potential father is usually unknown in studies demonstrating multiple paternity. Here we present the first study in Red-sided Garter Snakes (Thamnophis sirtalis parietalis (Say in James, 1832)) to use experimental population crosses to assess stored sperm usage, mate-order effects, and the potential for interpopulational gametic isolation. We found a high rate of multiple paternity indicative of ubiquitous long-term sperm storage in this system, and observed last-male sperm precedence in all families (n = 66). Postzygotic isolation was absent, and we observed only a weak asymmetry in pattern of sperm precedence in our population crosses.


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