It’s about Her: Male Within-Season Movements Are Related to Mate Searching in a Songbird

The American Naturalist, Journal Year: 2024, Volume and Issue: 203(5), P. 562 - 575

Published: Jan. 11, 2024

AbstractIn species with resource-defense mating systems (such as most temperate-breeding songbirds), male dispersal is often considered to be limited in both frequency and spatial extent. When occurs within a breeding season, the favored explanation ecological resource tracking. In contrast, movements of birds associated temporary emigration, such polyterritoriality (i.e., defense an additional location after attracting female initial territory), are usually attributed mate searching. We suggest that functionally related searching may unifying hypothesis for predicting within-season songbirds. Here, we test three key predictions derived from this Wood Warblers (

Language: Английский

---

Male song diversity and its relation to breeding success in southern house wrensTroglodytes aedon chilensis

Journal of Avian Biology, Journal Year: 2018, Volume and Issue: 49(6)

Published: Feb. 2, 2018

Theory proposes an adaptive relationship between male song complexity, including large repertoires, and improved breeding success. Evidence supporting these relationships exists but is sometimes mixed or weak. Here we provide a first comprehensive study of the diversity success in non‐migratory, austral population house wrens Troglodytes aedon chilensis Mendoza, Argentina. During two‐year field study, measured for 62 males recorded more than 34 000 songs from subsample 26 males. For latter subsample, tested correlations six measures four canonical annual Males that sang with greater overall syllable type had larger repertories paired females bred earlier laid eggs over course season. However, also showed lower levels immediate diversity, as by Levenshtein distance successive songs. We discuss implications evolution complexity this exceptionally widespread species selective mechanisms might influence resident populations Neotropics compared to migratory northern hemisphere.

Language: Английский

---

Annual variation of adult survival of a south-temperate House Wren population in Argentina

Avian Research, Journal Year: 2024, Volume and Issue: 15, P. 100180 - 100180

Published: Jan. 1, 2024

Identifying factors affecting the survival of individuals is essential for understanding evolution life-history traits and population dynamics. Despite numerous studies on this subject in north-temperate environments, there a lack equivalent at similar latitudes south. Here, we used 14-year dataset capture, banding, resighting to estimate annual variation apparent adult probability south-temperate House Wrens (Troglodytes aedon bonariae). We evaluated temporal effect environmental (climatic) demographic variables (adult abundance, total number fledglings produced during each breeding season) estimators. found that decreased as abundance adults increased. This density-dependent could be related resident lifestyle southern Wrens, which determine an intense competition territories resources ultimately would affect their survival.

Language: Английский

---

Adult sex ratio in south temperate house wrens is explained by sexual differences in adult survival

Journal of Ornithology, Journal Year: 2023, Volume and Issue: 165(1), P. 115 - 125

Published: July 1, 2023

Language: Английский

---

Spatial and temporal variation in breeding parameters of two south‐temperate populations of House Wrens

Journal of Field Ornithology, Journal Year: 2020, Volume and Issue: 91(1), P. 13 - 30

Published: Jan. 24, 2020

Studies of variation in breeding parameters are often based on temporal analyses a single population. However, to differentiate between the effects regional and local factors, neighboring populations with limited interpopulational dispersal need be compared. We studied two nearby (< 5 km apart) House Wrens (Troglodytes aedon bonariae) at ranches (Los Zorzales, 10 years; La Esperanza, 13 years) south-temperate Argentina assess possible factors phenology. For each season, we recorded laying dates, clutch sizes, length estimated reproductive synchrony first second attempts. examined how these were affected by weather, population density, rates nest failure. With favorable temperatures during pre-reproductive period (September–October), wrens both initiated attempts earlier. ordinal dates also Los Zorzales initiating earlier than those Esperanza. found spatial correlation sizes for 2007–2012 seasons, but nesting showed low variability. Reproductive varied among years, suggesting an effect factors. detected no synchronization unable identify environmental variables that explained variation. Ordinal clutches strongly correlated clutches. seasons was longer when daily mortality lower. Although seemed affect decision start breeding, pairs successful more likely initiate nests, thus affecting season. The our study provide evidence marked plasticity their decisions allowed us related this Variación espacial y de los parámetros reproductivos dos poblaciones Troglodytes bonariae del sur templado estudios la variación se basan frecuentemente en el análisis una única población. Sin embargo, para diferenciar entre efectos factores regionales locales, necesitan comparar vecinas con limitada dispersión ellas. Nosotros estudiamos cercanas (separadas por < km) años; años) evaluar posibles locales sobre su fenología reproductiva. En cada estación reproductiva registramos las fechas puesta nidadas, tamaño largo temporada reproductiva, estimamos sincronía primeros segundos intentos reproductivos. Examinamos cómo esos fueron afectados clima, densidad poblacional tasa falla nidificación. Con temperaturas pre-reproductivas (septiembre-octubre) favorables, individuos ambas iniciaron puestas más temprano. nidadas afectadas iniciando sus tempranamente que aquellos Aunque encontramos correlación durante temporadas reproductivas 2007–2012, tamaños demostraron baja variabilidad. varió años, sugiriendo efecto regionales. detectamos sincronización pudimos identificar ambientales explicasen temporal. Las segundas estuvieron fuertemente correlacionadas primeras nidadas. Finalmente, fue corta cuando fallas nidificación frecuentes. Mientras parecen afectar decisión cuándo iniciar reproducción, éxito condiciona segunda nidada, afectando duración especial T. a. reveló existencia marcada plasticidad decisiones nos permitió relacionados esta variación. Table S1. Durbin-Watson tests used testing correlations response study. S2. Pearson coefficients demographic included into south temperate Wrens. S3. Southern different sites (LE LZ) 2003–2012 2005-2017 respectively. Please note: publisher is not responsible content or functionality any supporting information supplied authors. Any queries (other missing content) should directed corresponding author article.

---

Neither sex appears to benefit from divorce within migratory Northern Flickers consistent with accidental loss and bet-hedging

Ornithology, Journal Year: 2021, Volume and Issue: 139(1)

Published: Sept. 24, 2021

Abstract Divorce is widespread among species of birds and may either be an adaptive strategy to secure a better mate or territory nonadaptive result failure maintain the pairbond. I examined causes consequences for divorce in Northern Flicker (Colaptes auratus), migratory woodpecker with high annual mortality rate. In long-term population study 1,793 breeding pairs over 17 years, within-season rate was 4.6% between-season 15.5%. Retained within season initiated their renest 5 days faster than divorced that had no greater fledgling production, suggesting making best bad job severe time constraints. Poor performance year prior not strongly associated divorce, analysis multiple stages revealed divorcing individuals subsequent later laying dates, smaller clutches, fewer fledglings retained but widowed individuals. Analyzing data separately by sex showed neither males nor females benefitted from divorce. Thus, there reproductive cost linked finding new partner per se, advantage New mates after were usually older (not higher quality) previous mates, so intrasexual competition probably driving partnership splits. The most plausible explanation seems “bet-hedging” hypothesis which re-pair rapidly spring if does quickly arrive during migration. Flickers appear future studies on arrival interactions will elucidate proximate constraints relocating partner.

Language: Английский

---

Alarm calls of southern house wrens, Troglodytes aedon bonariae, convey information about the level of risk

Ethology, Journal Year: 2021, Volume and Issue: 128(4), P. 293 - 302

Published: Dec. 7, 2021

Abstract Alarm calls are an antipredatory strategy widely used by animals. Some functionally referential, giving specific information about the perceived threat. In other cases, less although they may also provide level of threat or “urgency.” Here, we assess whether southern house wrens ( Troglodytes aedon bonariae ) risk when perceive a during nesting. We analysed call acoustic structure and repetition rate emitted breeding pair placed model predator at different distances from nest. The results showed that, there were no structural differences in alarm among treatments, individuals increased calling according to distance nest, reflecting Playback experiments reproduced rates that recruitment conspecific heterospecific with rate. These wren provides listeners respond accordingly.

Language: Английский

---

Social Mating System Divergence Between North and South Temperate Wrens

Springer eBooks, Journal Year: 2019, Volume and Issue: unknown, P. 1 - 20

Published: Jan. 1, 2019

Language: Английский

---

Contrasting patterns of natal dispersal of a south temperate House Wren population at local and regional scales

Journal of Ornithology, Journal Year: 2021, Volume and Issue: 162(3), P. 895 - 907

Published: April 17, 2021

Language: Английский

---

Density‐dependent natal philopatry in southern House Wrens

Ibis, Journal Year: 2022, Volume and Issue: 165(2), P. 436 - 447

Published: Oct. 31, 2022

Staying or leaving the natal site is a decision that not only affects individual but may have profound implications at population level. Many studies analysed philopatry in passerines, albeit mostly migratory species northern hemisphere. Here we explore potential ecological drivers of to remain leave southern hemisphere sedentary species, House Wren Troglodytes aedon bonariae . Using 14‐year database, assessed if juvenile local recruitment was affected by demographic and/or social factors. Average annual 18.4%, it varied between years (range 9.3–44%), and male higher than female recruitment. Juvenile negatively associated with adult breeding abundance hatching year, related variation sex ratio, year nesting success. Also, found no evidence inbreeding avoidance. The results seem support hypothesis rate regulated intraspecific competition for resources. Juveniles fledge when density adults low advantages obtaining territories mates early, benefiting from settling familiar areas reducing dispersal costs.

Language: Английский

---