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

scholarly journals Permanent female mimics in a lekking shorebird

2006 ◽  
Vol 2 (2) ◽  
pp. 161-164 ◽  
Author(s):  
Joop Jukema ◽  
Theunis Piersma
Keyword(s):  
Single Case ◽  
Mating Strategy ◽  
Mating Strategies ◽  
Alternative Mating Strategies ◽  
Alternative Mating Strategy ◽  
Care Giving ◽  
Philomachus Pugnax ◽  
In The Wild ◽  
Normal Males

Female mimics are known from many species, but permanent, non-conditional, alternative mating strategies are only known from an isopod, a fish, a lizard and a bird. The single bird example refers to lek-breeding ruffs Philomachus pugnax , a shorebird for which two strategies (independent and satellite) have been known for over 50 years. Ruffs also provided the single case of an animal with two, rather than three, permanent alternative mating strategies. Here, we describe a rare female-like morph of ruffs: the ‘missing’ third alternative mating strategy, which we have called ‘faeder’. Faeders are slightly larger than females and in late April have testes 2.5 time the size of testes of normal males. On leks in aviaries and in the wild they appear to combine feminine and masculine behaviours. Faeders may represent the ancestral, care-giving, male strategy, but their relatively large testes suggest that currently they behave as sneakers.

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