Copulation order, density cues and variance in fertilization success in a cestode
Authors: Andreou, D. and Benesh, D.P.
Journal: Parasitology
Volume: 141
Issue: 7
Pages: 934-939
eISSN: 1469-8161
ISSN: 0031-1820
DOI: 10.1017/S0031182014000043
Abstract:SUMMARY Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50-50 null expectation, sometimes considerably, implying there was a 'winner' in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment. © 2014 Cambridge University Press .
Source: Scopus
Copulation order, density cues and variance in fertilization success in a cestode.
Authors: Andreou, D. and Benesh, D.P.
Journal: Parasitology
Volume: 141
Issue: 7
Pages: 934-939
eISSN: 1469-8161
DOI: 10.1017/S0031182014000043
Abstract:Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50-50 null expectation, sometimes considerably, implying there was a 'winner' in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment.
Source: PubMed
Copulation order, density cues and variance in fertilization success in a cestode
Authors: Andreou, D. and Benesh, D.P.
Journal: PARASITOLOGY
Volume: 141
Issue: 7
Pages: 934-939
eISSN: 1469-8161
ISSN: 0031-1820
DOI: 10.1017/S0031182014000043
Source: Web of Science (Lite)
Copulation order, density cues and variance in fertilization success in a cestode
Authors: Andreou, D. and Benesh, D.
Journal: Parasitology (Cambridge)
Volume: 141
Issue: 7
Pages: 934-939
DOI: 10.1017/S0031182014000043
Abstract:Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50-50 null expectation, sometimes considerably, implying there was a 'winner' in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment.
Source: Manual
Preferred by: Demetra Andreou
Copulation order, density cues and variance in fertilization success in a cestode.
Authors: Andreou, D. and Benesh, D.P.
Journal: Parasitology
Volume: 141
Issue: 7
Pages: 934-939
eISSN: 1469-8161
ISSN: 0031-1820
DOI: 10.1017/s0031182014000043
Abstract:Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50-50 null expectation, sometimes considerably, implying there was a 'winner' in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment.
Source: Europe PubMed Central