Project description:Mothers may produce more of one sex to maximize their fitness if there are differences in the cost of producing each sex or there are differences in their relative reproductive value. Breeding date and clutch size are known to influence offspring sex ratios in birds through sex differences in dispersal, social behaviours, differential mortality, and available food resources. We tested if breeding date, clutch size and drought conditions influenced offspring sex ratios in a sexually size-monomorphic species, the Western Bluebird, by interrogating a 21-year dataset. After controlling for differential mortality, we found that hatch dates late in the breeding season were associated with the production of more females, suggesting that the value of producing males declines as the breeding season progresses. When clutch size was taken into account, small clutches yielded significantly more females late in the breeding season compared to the early and middle parts of the breeding season that produced significantly more males. Large clutches early in the season tended to produce more females, although this was not significant. Drought severity was not correlated with sex ratio adjustment. We propose and discuss several explanations for these patterns, including male offspring, but not female offspring, acting as helpers, increased female nestling provisioning late in the breeding season, differences in food abundance, and egg-laying order. Future work will help to uncover the mechanisms leading to these patterns. Identifying patterns and mechanisms of sex ratio skew from long-term datasets is important for informing predictions regarding life-history trade-offs in wildlife populations.

| S-EPMC9257600 | biostudies-literature

Transcript abundance comparison between BALB/c ears inoculated with Leishmania mexicana and Leishmania mexicana plus promastigote secretory gel (PSG)

Project description:To determine the modulation of gene expression of Leishmania mexicana(M379)-inoculated BALB/c ears in the presence of promastigote secretory gel (PSG) A genome-wide transcriptional analysis was performed by comparing the gene expression profiles of Leishmania mexicana- inoculated BALB/c ears and Leishmania mexicana plus PSG BALB/c ears. Leishmania mexicana amastigotes were purified from mouse cutaneous lesions and transformed in vitro in metacycic promastigotes (MT). After 6, 24 and 48 hours, ears were collected and processed for RNA extraction. Three Biological replicates per condition were run.

2013-12-17 | E-GEOD-52101 | biostudies-arrayexpress

Poecilia mexicana mexicana

Project description:Poecilia mexicana Reference Transcriptome

| PRJNA172116 | ENA

Transcript abundance comparison between BALB/c ears inoculated with Leishmania mexicana and Leishmania mexicana plus promastigote secretory gel (PSG)

Project description:To determine the modulation of gene expression of Leishmania mexicana(M379)-inoculated BALB/c ears in the presence of promastigote secretory gel (PSG)

2013-12-17 | GSE52101 | GEO

Argemone mexicana

Project description:Argemone mexicana

| PRJNA1356867 | ENA

Larentia mexicana

Project description:Larentia mexicana

| PRJNA1246512 | ENA

Tigridia mexicana

Project description:Tigridia mexicana

| PRJNA1256074 | ENA