scholarly journals Chromosomal Studies of the Hybrid between Female <i>Rhodeus ocellatus ocellatus</i> and Male <i>Rhodeus atremius fangi</i> in Bitterlings (Teleostei: Cypriniformes: Acheilognathinae)

2018 ◽  
Vol 09 (01) ◽  
pp. 17-22
Author(s):  
Takayoshi Ueda ◽  
Yukie Ueda
Keyword(s):  
Rhodeus Ocellatus

scholarly journals MALE DOMINANCE, FEMALE MATE CHOICE, AND INTERSEXUAL CONFLICT IN THE ROSE BITTERLING (RHODEUS OCELLATUS)

Evolution ◽  
2009 ◽  
Vol 63 (2) ◽  
pp. 366-376 ◽  
Author(s):  
Mara Casalini ◽  
Muna Agbali ◽  
Martin Reichard ◽  
Markéta Konečná ◽  
Anna Bryjová ◽  
...  
Keyword(s):  
Mate Choice ◽  
Female Mate Choice ◽  
Male Dominance ◽  
Female Mate ◽  
Intersexual Conflict ◽  
The Rose ◽  
Rhodeus Ocellatus

The effect of crowding and density on male mating behaviour in the rose bitterling (Rhodeus ocellatus)

Behaviour ◽  
2010 ◽  
Vol 147 (8) ◽  
pp. 1035-1050 ◽  
Author(s):  
Martin Reichard ◽  
Carl Smith ◽  
Mara Casalini
Keyword(s):  
Mating System ◽  
Mating Behaviour ◽  
Operational Sex Ratio ◽  
Male Mating ◽  
Sexual Competition ◽  
Male Density ◽  
Mating System Evolution ◽  
Theoretical Predictions ◽  
Key Variables ◽  
Rhodeus Ocellatus

AbstractFemale density and resource availability are two key variables that shape mating systems. Theory predicts that reproductive skew will amplify with increased male density and decreasing availability of resources, though limited empirical evidence suggests that this may not always be the case. Here we tested mean crowding, defined as the number of males per unit of resource, and density per se, defined as the number of individuals present per unit area, to investigate their effect on the mating system of Rhodeus ocellatus, a fish with a promiscuous, resource-based mating system. Males were exposed to combinations of high and low levels of crowding and density, while the operational sex ratio was held constant. High levels of crowding significantly affected the proportion of mussel spawning sites defended by males and the proportion of mussels into which sperm was released. In contrast to theoretical predictions, neither density nor crowding influenced overall male aggressive behaviours. Density, but not crowding, had a significant effect on male courtship rate, which arose as a possible trade-off between intra-sexual competition and inter-sexual behaviour. We discuss the results in the context of mating system evolution.

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