Influence of immune-relevant genotype on the reproductive success of a salmonid alternative mating strategy

2015 ◽  
Vol 86 (3) ◽  
pp. 871-881
Author(s):  
K. G. O'Malley ◽  
B. Perales ◽  
A. C. Whitcomb
Keyword(s):  
Reproductive Success ◽  
Mating Strategy ◽  
Alternative Mating Strategy

scholarly journals Polygyny and Extra-Pair Paternity in a Population of Southwestern Willow Flycatchers

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 571-578
Author(s):  
Talima Pearson ◽  
Mary J. Whitfield ◽  
Tad C. Theimer ◽  
Paul Keim
Keyword(s):  
Reproductive Success ◽  
Microsatellite Markers ◽  
Mating Strategy ◽  
Male Reproductive Success ◽  
Offspring Survival ◽  
Extra Pair Paternity ◽  
Study Population ◽  
Willow Flycatcher ◽  
Empidonax Traillii ◽  
Disproportionate Number

Abstract Although polygyny can potentially increase male reproductive success, the benefits of this strategy could be offset by losses to extra-pair paternity or reduced offspring survival. We developed microsatellite markers to assess the influence of extra-pair offspring (EPO) on reproductive success and paternity in monogamous and polygynous pairs of the facultatively polygynous Southwestern Willow Flycatcher (Empidonax traillii extimus). Based on genotypes of 140 offspring from 56 clutches over six years, 14% of nestlings in our study population were extra-pair offspring, with 23% of all successful nests containing at least one EPO. We found that polygynous males produced 2.11 ± 0.35 offspring per season, compared to 1.15 ± 0.18 for monogamous males. This increased reproductive success was due primarily to the increased number of nests of polygynous males, as the number of offspring per pair did not differ between monogamous and polygynous males. Twenty of the 140 genotyped nestlings were extra-pair offspring. Sires could be assigned to 16 of these; one polygynous male sired two EPO in one nest, two monogamous males sired eight EPO in two nests, and four nonterritorial males sired six EPO in four nests. Overall, these results indicate that in this population, females of polygynous males did not raise a disproportionate number of EPO as a result of the polygynous mating strategy of their mate, and that both territorial and nonterritorial males sired EPO.

Reproduction by Captive Unplumed Male Lesser Bird of ParadiseParadisaea minor: Evidence for an Alternative Mating Strategy?

1992 ◽  
Vol 92 (2) ◽  
pp. 108-111 ◽  
Author(s):  
Mark S. Laska ◽  
Michael Hutchins ◽  
Christine Sheppard ◽  
Wendy Worth ◽  
Kurt Hundgen ◽  
...  
Keyword(s):  
Mating Strategy ◽  
Alternative Mating Strategy

Intermolt Insemination, an Alternative Mating Strategy for the American Lobster (Homarus americanus)

1990 ◽  
Vol 47 (12) ◽  
pp. 2402-2406 ◽  
Author(s):  
S. L. Waddy ◽  
D. E. Aiken
Keyword(s):  
Reproductive Strategy ◽  
Carapace Length ◽  
Homarus Americanus ◽  
Mating Strategy ◽  
American Lobster ◽  
Male Aggression ◽  
Female Receptivity ◽  
Molt Stage ◽  
Alternative Mating Strategy ◽  
Ovarian Stage

American lobster (Homarus americanus) have a dual mating strategy. Although most females mate when they are newly molted, mating can occur at any molt stage if necessary, in the laboratory, virtually all uninseminated preovigerous females mate prior to spawning. Male aggression is a major factor in the success of intermolt mating and males can discriminate between immature and mature females, and between inseminated and uninseminated females. Female receptivity is affected by both ovarian stage and the presence of stored sperm, but not by molt stage. Most females become unreceptive after insemination, but their receptivity returns once the supply of stored sperm is exhausted. Intermolt mating occurs in smaller lobster that for some reason did not mate at molt, and it is an important part of the reproductive strategy of larger lobster. Lobster s[Formula: see text] carapace length frequently spawn twice without molting and often fail to store sufficient sperm to fertilize consecutive spawnings. Intermolt mating ensures these females will produce fertile second broods.

Influence of density and major histocompatibility genotype on sexual selection in a salmonid alternative mating strategy

2012 ◽  
Vol 69 (4) ◽  
pp. 670-680 ◽  
Author(s):  
Laura K. Weir ◽  
Jeffrey A. Hutchings ◽  
Daniel D. Heath
Keyword(s):  
Sexual Selection ◽  
Salmo Salar ◽  
Fertilization Success ◽  
Mating Strategy ◽  
Male Mating ◽  
Salmonid Fishes ◽  
Major Histocompatibility ◽  
Main Determinant ◽  
Alternative Mating Strategy

Various mechanisms of sexual selection can occur at both the whole organism and gamete levels. Fertilization success in salmonid fishes is largely determined by behavioural competition within and between “fighter” and “sneaker” male strategies, but is also influenced by interactions among gametes. We investigated the influence of density, fighter male presence, and major histocompatibility (MH) genotype on patterns of fertilization success in sneaker Atlantic salmon ( Salmo salar ). At low density and in the absence of fighter males, monopolization by single sneaker males occurred, suggesting that male–male competition was the main determinant of fertilization success. By contrast, at high density and (or) in the presence of fighter males, several sneakers succeeded in fertilizing eggs. Our study, the first to investigate the role of MH-mediated fertilization for a genetically based alternative male mating strategy, suggests that a larger proportion of eggs were fertilized by sneakers whose MH genotypes were more similar to those of the female than expected by chance. These findings highlight the importance of examining sexual selection under different competitive conditions.

The discovery of the ‘transient’ male Tibetan wild ass: alternative ‘sneaky’ mating tactics in a wild equid?

Behaviour ◽  
2017 ◽  
Vol 154 (1) ◽  
pp. 1-18
Author(s):  
Prameek M. Kannan ◽  
Michael H. Parsons ◽  
Pushpinder S. Jamwal ◽  
Pankaj S. Chandan ◽  
Faith E. Parsons ◽  
...  
Keyword(s):  
Social Class ◽  
Developmental Stage ◽  
Mating Strategy ◽  
Mating Tactics ◽  
The Third ◽  
Minimal Time ◽  
Alternative Mating Strategy ◽  
Urine Marking ◽  
Wild Ass ◽  
Social Behaviours

Male asses usually consist of two classes, social bachelors and solitary, territorial males. However, our observations of the Tibetan wild ass (Equus kiang) suggested a third class may exist. Unexpectedly, unidentified males were often found courting females within another male’s territory. To test our hypothesis that a new social class existed, we compared 12 social behaviours among three putative groups. The third male-type spent less time herding and demonstrating flehmen, while spending more time retreating, trotting and in proximity of females, where they were more likely to engage in courtship and urine-marking. Based on increased time spent among females within other territories, the most courtship events, and minimal time invested in each courtship, they appear to employ ‘sneaky’ mating tactics. We discuss whether these ‘transient’ males are demonstrating an adaptive alternative mating strategy, or whether these behaviours result from a discrete developmental stage of bachelors unready to challenge a rival.

scholarly journals Surface Mating as an Alternative Mating Strategy in the Fiddler Crab Uca lactea

2006 ◽  
Vol 29 (1) ◽  
pp. 49-53 ◽  
Author(s):  
Tae-Won Kim ◽  
Tae-Keun Kim ◽  
Sun-Kee Hong ◽  
Jae-Chun Choe
Keyword(s):  
Fiddler Crab ◽  
Mating Strategy ◽  
Alternative Mating Strategy ◽  
Uca Lactea
Sign in / Sign up

Export Citation Format

Share Document