Studies of sperm competition in two species of muroid rodents

Dewsbury, Donald A.; Baumgardner, Denis J.

doi:10.1007/bf00293583

Cited by 81 publications

(33 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The difference in MF, found in sperm-competition tests by Dewsbury and Baumgardner (1981), was not found in this study. The difference in Mill, found in the present study, was not found by Dewsbury and Baumgardner.…”

Section: Methodscontrasting

confidence: 86%

“…These events are organized into ejaculatory series, with each series beginning with an intromission and ending with an ejaculation. The following standard measures (see Dewsbury &Baumgardner, 1981, andGray &Dewsbury, 1973) were used: mount latency (ML), intromission latency (IL), ejaculation frequency (EF), ejaculation latency (EL), intromission frequency (IF), mount frequency (MF), thrust frequency (TF), ejaculatory thrust frequency (ET), thrusts per intromission (Til), mean intromission duration (MID), and mean interintromission interval (MIII). All temporal measures were in seconds; in cases in which a measure refers to a particular series, that series is designated (e.g., IF-2).…”

Section: Methodsmentioning

confidence: 99%

“…Prairie voles copulate reliably in the laboratory (Gray & Dewsbury, 1973), and a recessive albino mutant has been isolated (Richmond & Conaway, 1969). In a study of sperm competition in albino and wild-type voles, Dewsbury and Baumgardner (1981) found that albino males had significantly higher mount frequencies that wild-type males. In addition, the albinos had greater differential fertilizing capacity-the capacity to gain representation in litters resulting from multiple-male mating with a single female when such factors as the order, timing, and number of ejaculations by the two males are controlled.…”

Section: University Of Florida Gainesville Floridamentioning

confidence: 99%

See 2 more Smart Citations

Effects of albinism on copulatory behavior and sperm competition in prairie voles (Microtus ochrogaster)

Dewsbury

Ward

1985

Bull. Psychon. Soc.

Self Cite

View full text Add to dashboard Cite

Three studies of copulatory behavior and sperm competition in albino and wild-type prairie voles, Microtus ochrogaster, were completed. In Experiment 1, albino males had shorter interintromission intervals than wild-type males when mating with hormone-injected females. In Experiment 2, sperm competition was studied using a reconstituted albino line in which the albino gene was placed on a background of predominately wild type. There were no significant genotype effects on copulatory behavior, although there was an effect of mating order. The previously demonstrated advantages of albino males and of males mating last were replicated. In Experiment 3, the albino males' advantage could not be overcome even when the wild-type males were permitted two ejaculations to their one. Albinism in prairie voles appears to have a strong effect on fertilizing capacity but to have only weak effects on behavior.

show abstract

Section: Methodscontrasting

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Section: University Of Florida Gainesville Floridamentioning

confidence: 99%

See 1 more Smart Citation

Effects of albinism on copulatory behavior and sperm competition in prairie voles (Microtus ochrogaster)

Dewsbury

Ward

1985

Bull. Psychon. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Last-male advantages should be most conunon in species with substantial paternal investtnent; this pattern is not shown by meadow voles (McGuire & Novak, 1984). In this respect, meadow voles are similar to both laboratory rats (Lanier et al, 1979) and deer mice (e.g., Dewsbury & Baumgardner, 1981).…”

Section: Discussionmentioning

confidence: 96%

“…There is some cross-species consistency of effects of mating order on male copulatory behavior. It has generally been found that when mating with recently mated females, male deer mice also tend to-have shorter MLs and 1Ls, longer ELs, and higher IFs and MFs than when mating with unmated females (Dewsbury, , 1985Dewsbury & Baumgardner, 1981) . Male prairie voles tend to have higher MFs when mating with recently mated females (see Dewsbury & Baumgardner) .…”

Section: Discussionmentioning

confidence: 99%

Sperm competition and effects of mating order on copulatory behavior in meadow voles (Microtus pennsylvanicus)

Dewsbury

1993

Bull. Psychon. Soc.

Self Cite

View full text Add to dashboard Cite

The pattern of sperm competition and effects of mating order were examined in meadow voles (Microtus pennsylvanicus). When males were the second to mate with a given female during an estrus, they had shorter latencies to intromission, longer latencies to ejaculation, longer mount durations, longer intromission durations,ll,nd higher mount frequencies and intromission frequencies than when mating flrst. Although few litters were produced, there was no suggestion of an order effect on litter composition.Although animals generally copulate within a social context in nature, most laboratory studies of copulatory behavior have been conducted in single-pair situations. In the more natural situation, there are more complicated behavioral and physiological interactions that affect the reproductive success of individual males and females.

show abstract

Sexual dimorphism and hormone responsiveness in the spinal cord of the socially monogamous prairie vole (Microtus ochrogaster)

Holmes

Musa

Lonstein

et al. 2009

J of Comparative Neurology

View full text Add to dashboard Cite

Prairie voles (Microtus ochrogaster) are exceptional among rodents in that many aspects of their brain and behavior are not masculinized by exogenous aromatizable androgens. However, the sexually differentiated endpoints studied to date rely on estrogenic mechanisms in other mammals. We examined whether sexual differentiation of an androgen receptor-dependent sex difference would be similarly distinct in prairie voles. Male mammals have more and larger motoneurons projecting to perineal muscles than do females. This sex difference normally arises from males' perinatal androgen exposure and can be eliminated by treating developing females with androgens. Gross dissection revealed bulbospongiosus muscles in adult male, but not female, prairie voles. Retrograde tracing from males' bulbocavernosus muscles and the external anal sphincter from both sexes revealed sexually dimorphic populations of labeled motoneurons in the ventral horn of the lumbar spinal cord. Similar to other rodents, males had twice as many motoneurons as females, although no sex difference in motoneuron size was detected. Unexpectedly, prenatal or early postnatal exposure to testosterone propionate had no effect on adult females' motoneuron number or size. In adulthood, gonadectomy alone or followed by chronic testosterone treatment also had no effect on females' motoneuron size or number, although castration reduced motoneuron size in males. Comparing gonadally intact weanlings confirmed that the sex difference in motoneuron number exists before adulthood. As with some other sexually dimorphic traits, and perhaps related to their unique social organization, sexual differentiation of the prairie vole spinal cord differs from that found in most other laboratory rodents.

show abstract

Studies of sperm competition in two species of muroid rodents

Cited by 81 publications

References 51 publications

Effects of albinism on copulatory behavior and sperm competition in prairie voles (Microtus ochrogaster)

Effects of albinism on copulatory behavior and sperm competition in prairie voles (Microtus ochrogaster)

Sperm competition and effects of mating order on copulatory behavior in meadow voles (Microtus pennsylvanicus)

Sexual dimorphism and hormone responsiveness in the spinal cord of the socially monogamous prairie vole (Microtus ochrogaster)

Contact Info

Product

Resources

About