Copulatory plug displacement and prolonged copulation in the Iberian rock lizard (Lacerta monticola)

Author(s):  
PedroL. Moreira ◽  
TimR. Birkhead
2019 ◽  
Vol 53 (5) ◽  
pp. 375-384
Author(s):  
M. Drohvalenko ◽  
A. Mykhailenko ◽  
M. Rekrotchuk ◽  
L. Shpak ◽  
V. Shuba ◽  
...  

Abstract A part of the COI mitochondrial barcoding gene was sequenced from seven species of different taxonomical groups: Ambystoma mexicanum (Amphibia, Ambystomatidae), Darevskia lindholmi, Lacerta agilis exigua (Reptilia, Lacertidae), Erinaceus roumanicus (Mammalia, Erinaceidae), Macrobiotus sp. 1 and 2 (Eutardigrada, Macrobiotidae) and Cameraria ohridella (Insecta, Gracillariidae). The sequences were compared with available sequences from databases and positioned on phylogenetic trees when the taxa had not yet been sequenced. The presence of Mexican axolotls in herpetoculture in Ukraine was confirmed. The partial COI genes of the Crimean rock lizard and an eastern sub-species of the sand lizard were sequenced. We demonstrated the presence of two tardigrade mitochondrial lineages of the Macrobiotus hufelandi group in the same sample from the Zeya Natural Reserve in the Far East: one was nearly identical to the Italian M. macrocalix, and the other one is similar to M. persimilis and M. vladimiri. We also confirmed the presence of the invasive haplotype “A” of the horse chestnut leaf miner in Ukraine, in line with the hypothesized route of invasion from Central Europe.


Author(s):  
Lough-Stevens Michael ◽  
Caleb Ghione ◽  
Matthew Urness ◽  
Adelaide Hobbs ◽  
Colleen Sweeney ◽  
...  

Abstract Among a wide diversity of sexually reproducing species, male ejaculates coagulate to form what has been termed a copulatory plug. A number of functions have been attributed to copulatory plugs, including, but not limited to, the inhibition of female remating and the promotion of ejaculate movement. Here we demonstrate that copulatory plugs also influence the likelihood of implantation, which occurs roughly four days after copulation in mice. Using a bead transfer method to control for differences in ejaculate retention and fertilization rates, we show that implantation rates significantly drop among females mated to genetically engineered males incapable of forming plugs (because they lack functional TGM4, the main enzyme responsible for its formation). Surprisingly, this result does not correlate with differences in circulating progesterone levels among females, an important hormone involved in implantation. In this paper we discuss three models that connect male-derived copulatory plugs to implantation success, including the hypothesis that plugs contribute to a threshold amount of stimulation required for females to become receptive to implantation.


2008 ◽  
Vol 60 (2) ◽  
pp. 279-288 ◽  
Author(s):  
Katarina Ljubisavljevic ◽  
Lidija Polovic ◽  
Ana Ivanovic

Sexual differences in size and shape of the Mosor rock lizard, Dinarolacerta mosorensis (Kolombatovic, 1886), from Lovcen Mountain (Montenegro) were examined on the basis of the intersex variation pattern of nine morphometric, eight pholidotic, and four qualitative traits. Sexual dimorphism was apparent for all morphometric characters except snout-vent length, while scalation and dorsal pattern exhibited small differences between sexes. The value of the sexual size difference (SSD) index based on snout-vent length was 1.028. The sex-specific allometric slopes for head dimensions and interlimb distance significantly diverged. Head dimensions, especially head height, showed strong positive allometry in males, while interlimb distance was the only character which showed positive allometry in females. Generally, males had significantly greater body size than females. This was true of all body measurements except interlimb distance. The influence of sexual and natural selection on the examined traits is discussed.


2016 ◽  
Vol 16 (3/4) ◽  
pp. 151-160
Author(s):  
A. Yu. Tsellarius ◽  
◽  
E. Yu. Tsellarius ◽  
E. A. Galoyan ◽  
◽  
...  
Keyword(s):  

2019 ◽  
Vol 9 (24) ◽  
pp. 14476-14488 ◽  
Author(s):  
Gergely Horváth ◽  
Gonzalo Rodríguez‐Ruiz ◽  
José Martín ◽  
Pilar López ◽  
Gábor Herczeg
Keyword(s):  

Heredity ◽  
2015 ◽  
Vol 115 (6) ◽  
pp. 496-502 ◽  
Author(s):  
R Mangels ◽  
B Young ◽  
S Keeble ◽  
R Ardekani ◽  
C Meslin ◽  
...  
Keyword(s):  

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