Pub Date : 2024-09-07DOI: 10.1177/17581559241281207
Melanie G. Kimball, Avery R. Grant, Keegan R. Stansberry, Ava D. Chrisler, Jessica L. Malisch
Resource mobilization and reallocation is a major endpoint of the physiological response to acute challenges. However, energy metabolites have not been the focus of most field studies. Here, we characterized the glycemic and free fatty acid (FFA) response to an acute-handling challenge in a breeding, free-living, population of Mountain Dark-eyed Juncos ( Junco hyemalis oreganus) in Mono County, CA. Juncos ( n = 12) were trapped in seed-baited potter traps at Tioga Pass Meadow, coinciding with territory establishment and early nesting period. Blood samples were collected at 0, 15, and 30 min post-capture, and analysis showed Juncos mobilized both glucose and FFA in response to an acute handling challenge. Blood glucose levels were significantly higher than baseline at 15 min (42.6% increase) and 30 min post-capture (66.7% increase). FFA levels were also significantly higher than baseline at 15 min (29.2% increase) and 30 min post-capture (22% increase). We also measured morphometrics (e.g., wing chord length, tarsus length, etc.), fat, and mass for each individual to investigate the effects of body size and fat storage on energy mobilization using linear models. We found no significant effects of body size or fat and mass on FFA mobilization. However, body size had a significant effect on glucose mobilization, with larger individuals displaying a higher percent increase in glucose from baseline to 15 min. Additionally, we found an effect of sex on glucose mobilization, with males showing a higher percent increase in glucose from baseline to 15 min. These results suggest that energy mobilization capacity is influenced by body size and male Juncos may increase energy mobilization relative to females during the breeding season.
{"title":"An acute handling challenge mobilizes glucose and free fatty acids in mountain Dark-eyed Juncos (Junco hyemalis oreganus)","authors":"Melanie G. Kimball, Avery R. Grant, Keegan R. Stansberry, Ava D. Chrisler, Jessica L. Malisch","doi":"10.1177/17581559241281207","DOIUrl":"https://doi.org/10.1177/17581559241281207","url":null,"abstract":"Resource mobilization and reallocation is a major endpoint of the physiological response to acute challenges. However, energy metabolites have not been the focus of most field studies. Here, we characterized the glycemic and free fatty acid (FFA) response to an acute-handling challenge in a breeding, free-living, population of Mountain Dark-eyed Juncos ( Junco hyemalis oreganus) in Mono County, CA. Juncos ( n = 12) were trapped in seed-baited potter traps at Tioga Pass Meadow, coinciding with territory establishment and early nesting period. Blood samples were collected at 0, 15, and 30 min post-capture, and analysis showed Juncos mobilized both glucose and FFA in response to an acute handling challenge. Blood glucose levels were significantly higher than baseline at 15 min (42.6% increase) and 30 min post-capture (66.7% increase). FFA levels were also significantly higher than baseline at 15 min (29.2% increase) and 30 min post-capture (22% increase). We also measured morphometrics (e.g., wing chord length, tarsus length, etc.), fat, and mass for each individual to investigate the effects of body size and fat storage on energy mobilization using linear models. We found no significant effects of body size or fat and mass on FFA mobilization. However, body size had a significant effect on glucose mobilization, with larger individuals displaying a higher percent increase in glucose from baseline to 15 min. Additionally, we found an effect of sex on glucose mobilization, with males showing a higher percent increase in glucose from baseline to 15 min. These results suggest that energy mobilization capacity is influenced by body size and male Juncos may increase energy mobilization relative to females during the breeding season.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"8 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-26DOI: 10.1177/17581559241268134
Gabriele Bortolotto Cunha, Erika Paola Pereira Silva, Jair Duarte da Costa Junior, Líria Queiroz Luz Hirano
Similar to most Psittaciformes, the blue-fronted parrot ( Amazona aestiva) lacks sexual dimorphism. In this way, sexing methods have been investigated to assist in the reproductive management and medical care of these birds. This study aimed to assess head and radiographic biometry for sex identification of blue-fronted parrots. Six head measurements and 23 radiographic measurements of 52 carcasses (24 males and 28 females) were taken. Males exhibited higher mean values than females for most of the measurements. For head biometry, the proposed discriminant equation containing rhinotheca length and head plus rhinotheca length allowed for correct sexing of 60% of males and 88% of females, while for radiographic biometry the discriminant equation containing head heigh and right alula length allowed the discrimination of 84.6% of males and 66.7% of females. This is the first study evaluating the use of radiographic biometry for sexing psittaciforms. Both biometric methods are suitable for sexing blue-fronted parrots when DNA sampling is not possible, since they are low-cost, provide immediate results, and are non-invasive techniques.
{"title":"Sex determination in blue-fronted parrot (Amazona aestiva) using head and radiographic biometry","authors":"Gabriele Bortolotto Cunha, Erika Paola Pereira Silva, Jair Duarte da Costa Junior, Líria Queiroz Luz Hirano","doi":"10.1177/17581559241268134","DOIUrl":"https://doi.org/10.1177/17581559241268134","url":null,"abstract":"Similar to most Psittaciformes, the blue-fronted parrot ( Amazona aestiva) lacks sexual dimorphism. In this way, sexing methods have been investigated to assist in the reproductive management and medical care of these birds. This study aimed to assess head and radiographic biometry for sex identification of blue-fronted parrots. Six head measurements and 23 radiographic measurements of 52 carcasses (24 males and 28 females) were taken. Males exhibited higher mean values than females for most of the measurements. For head biometry, the proposed discriminant equation containing rhinotheca length and head plus rhinotheca length allowed for correct sexing of 60% of males and 88% of females, while for radiographic biometry the discriminant equation containing head heigh and right alula length allowed the discrimination of 84.6% of males and 66.7% of females. This is the first study evaluating the use of radiographic biometry for sexing psittaciforms. Both biometric methods are suitable for sexing blue-fronted parrots when DNA sampling is not possible, since they are low-cost, provide immediate results, and are non-invasive techniques.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"62 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141779537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-19DOI: 10.1177/17581559241265581
Adara DeNiro, Kyle D Kittelberger, Atoosa M Samani, Çağan Hakkı Şekercioğlu
Solar eclipses present rare celestial events that can elicit unique behavioral responses in animals, yet comprehensive studies on these phenomena, particularly concerning bird behavior, remain limited. This study, conducted at the Red Butte Canyon Research Natural Area in Utah during the annular solar eclipse on October 14, 2023, aimed to document and analyze avian activity using bird banding data. Leveraging 11 years of banding records, we observed a surprising positive peak in bird captures, indicating increased activity during the eclipse, challenging conventional expectations of decreased activity during peak totality. The unexpected, record-breaking captures on the eclipse day at this location, which also surpassed the average trend in captures over time for 18 other banding days in mid-October, highlights the complexity of bird behavior during celestial events. This study marks the first known published effort to conduct bird banding during a solar eclipse. Quantitative analyses, including species composition and capture trends, contribute to a nuanced understanding of avian responses to the eclipse. This study underscores the importance of empirical research in unraveling the intricacies of how birds navigate and adapt to unique environmental conditions created by solar eclipses.
{"title":"Solar bird banding: Notes on changes in avian behavior while mist-netting during an eclipse","authors":"Adara DeNiro, Kyle D Kittelberger, Atoosa M Samani, Çağan Hakkı Şekercioğlu","doi":"10.1177/17581559241265581","DOIUrl":"https://doi.org/10.1177/17581559241265581","url":null,"abstract":"Solar eclipses present rare celestial events that can elicit unique behavioral responses in animals, yet comprehensive studies on these phenomena, particularly concerning bird behavior, remain limited. This study, conducted at the Red Butte Canyon Research Natural Area in Utah during the annular solar eclipse on October 14, 2023, aimed to document and analyze avian activity using bird banding data. Leveraging 11 years of banding records, we observed a surprising positive peak in bird captures, indicating increased activity during the eclipse, challenging conventional expectations of decreased activity during peak totality. The unexpected, record-breaking captures on the eclipse day at this location, which also surpassed the average trend in captures over time for 18 other banding days in mid-October, highlights the complexity of bird behavior during celestial events. This study marks the first known published effort to conduct bird banding during a solar eclipse. Quantitative analyses, including species composition and capture trends, contribute to a nuanced understanding of avian responses to the eclipse. This study underscores the importance of empirical research in unraveling the intricacies of how birds navigate and adapt to unique environmental conditions created by solar eclipses.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"61 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-19DOI: 10.1177/17581559241265582
Xiaogang Yao, Zhumei Li, Canchao Yang, Wei Liang, Anders Pape Møller
Many animals display numerous colors that can range from red, green, blue, and orange to ultraviolet, whereas others are dull or have a uniform coloration. The reason for this variation in coloration remains unknown. It has been hypothesized that different colors represent multiple signals that either reflect different components, redundant information, or simply no longer provide reliable information regarding body quality. Here, we analyzed the highly diverse coloration of male golden pheasants ( Chrysolophus pictus) using an avian visual model from the avian visual system and related the different components of coloration to several phenotypic traits of body quality. We found that different components of plumage color correlated with the length of the body, tail, spur, and beak, suggesting that the multiple colors in male golden pheasants signal different components of body quality. In particular, tail length was correlated with many aspects of coloration, especially the green and orange colors of neck plumage, which are particularly important because male golden pheasants spread their neck plumage and show it to females during their courtship display. Therefore, these findings reveal that the plumage colors of male golden pheasants encode multiple signals that reflect their body condition during courtship displays.
{"title":"Multiple plumage color signals associated with courtship displays may represent body quality in male golden pheasants (Chrysolophus pictus)","authors":"Xiaogang Yao, Zhumei Li, Canchao Yang, Wei Liang, Anders Pape Møller","doi":"10.1177/17581559241265582","DOIUrl":"https://doi.org/10.1177/17581559241265582","url":null,"abstract":"Many animals display numerous colors that can range from red, green, blue, and orange to ultraviolet, whereas others are dull or have a uniform coloration. The reason for this variation in coloration remains unknown. It has been hypothesized that different colors represent multiple signals that either reflect different components, redundant information, or simply no longer provide reliable information regarding body quality. Here, we analyzed the highly diverse coloration of male golden pheasants ( Chrysolophus pictus) using an avian visual model from the avian visual system and related the different components of coloration to several phenotypic traits of body quality. We found that different components of plumage color correlated with the length of the body, tail, spur, and beak, suggesting that the multiple colors in male golden pheasants signal different components of body quality. In particular, tail length was correlated with many aspects of coloration, especially the green and orange colors of neck plumage, which are particularly important because male golden pheasants spread their neck plumage and show it to females during their courtship display. Therefore, these findings reveal that the plumage colors of male golden pheasants encode multiple signals that reflect their body condition during courtship displays.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"77 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-02DOI: 10.1177/17581559241249053
Juan Camilo Gutierrez-Toro, Héctor Anibal Campos Mosos
Gene flow, the movement of genes between populations, profoundly influences genetic and phenotypic homogeneity among populations. This study investigates gene flow patterns in two migratory hummingbird species, Selasphorus platycercus and Calothorax lucifer, shedding light on the intricate interplay between migration, resource availability, and genetic diversity. Using previously published information on microsatellites, we examine the genetic makeup and the movement of genes within populations. Selasphorus platycercus displays distinct genetic groups which can be associated with its migratory behaviour. Gene flow analysis suggests a higher level of connectivity among populations sharing winter ranges. In contrast, Calothorax lucifer populations exhibit genetic divergence despite overlapping winter ranges, possibly due to environmental niche adaptation and limited reproductive opportunities for dispersing individuals. While geographical distance does not explain genetic differentiation in these species, environmental niche similarities appear to facilitate gene flow. This study underscores the significance of migratory routes, resource availability, and niche adaptation in shaping gene flow dynamics in hummingbirds. Understanding these dynamics is crucial for the conservation and management of these unique avian populations.
{"title":"Seasonal migration directs and facilitates gene flow in the Broad-tailed and Lucifer Sheartail Hummingbirds","authors":"Juan Camilo Gutierrez-Toro, Héctor Anibal Campos Mosos","doi":"10.1177/17581559241249053","DOIUrl":"https://doi.org/10.1177/17581559241249053","url":null,"abstract":"Gene flow, the movement of genes between populations, profoundly influences genetic and phenotypic homogeneity among populations. This study investigates gene flow patterns in two migratory hummingbird species, Selasphorus platycercus and Calothorax lucifer, shedding light on the intricate interplay between migration, resource availability, and genetic diversity. Using previously published information on microsatellites, we examine the genetic makeup and the movement of genes within populations. Selasphorus platycercus displays distinct genetic groups which can be associated with its migratory behaviour. Gene flow analysis suggests a higher level of connectivity among populations sharing winter ranges. In contrast, Calothorax lucifer populations exhibit genetic divergence despite overlapping winter ranges, possibly due to environmental niche adaptation and limited reproductive opportunities for dispersing individuals. While geographical distance does not explain genetic differentiation in these species, environmental niche similarities appear to facilitate gene flow. This study underscores the significance of migratory routes, resource availability, and niche adaptation in shaping gene flow dynamics in hummingbirds. Understanding these dynamics is crucial for the conservation and management of these unique avian populations.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"55 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140837042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-17DOI: 10.1177/17581559231216907
Eyda A. Moreno-Mosquera, R. Drechsler, Silvia Rivera, J. S. Monrós
Understanding habitat selection patterns in congeneric species has raised special interest due to its importance when designing conservation strategies for the species. We analysed reproductive habitat selection of three coexisting warbler species in the eastern Iberian Peninsula. We detected the individuals by their vocalizations at 40 listening points in two study areas (Carcaixent and Alcoy). We used satellite images to identify different vegetation types and their availability. Reproductive habitat selection was analysed by the Ivlev selectivity index and a compositional analysis. In addition, we determined the effect of different habitat variables (dominant vegetation, vegetation height, cover and site) on the presence of the species fitting a binomial GLM with logistic linking function. We found that the Sardinian Warbler ( Curruca Melanocephala) selected scrub-dominated areas; while the Dartford Warbler ( C. undata) preferred areas with low (<50%) vegetation cover; and the Subalpine Warbler ( C. cantillans) was present in areas with scrubs and low (<50%) vegetation cover, avoiding crops. The compositional analysis showed that the species used different vegetation types, in relation to their availability and that the selection differed between species. The Sardinian Warbler was the only species which showed spatial variation in reproductive habitat selection. Our results evidence that the studied warbler species select and avoid different types of vegetation in relation to their specific requirements and the present habitat structure. This represents valuable information to understand the composition of local communities and the reproductive habitat selection of the studied species.
{"title":"Breeding habitat selection of three sympatric species of Mediterranean warblers in eastern Spain","authors":"Eyda A. Moreno-Mosquera, R. Drechsler, Silvia Rivera, J. S. Monrós","doi":"10.1177/17581559231216907","DOIUrl":"https://doi.org/10.1177/17581559231216907","url":null,"abstract":"Understanding habitat selection patterns in congeneric species has raised special interest due to its importance when designing conservation strategies for the species. We analysed reproductive habitat selection of three coexisting warbler species in the eastern Iberian Peninsula. We detected the individuals by their vocalizations at 40 listening points in two study areas (Carcaixent and Alcoy). We used satellite images to identify different vegetation types and their availability. Reproductive habitat selection was analysed by the Ivlev selectivity index and a compositional analysis. In addition, we determined the effect of different habitat variables (dominant vegetation, vegetation height, cover and site) on the presence of the species fitting a binomial GLM with logistic linking function. We found that the Sardinian Warbler ( Curruca Melanocephala) selected scrub-dominated areas; while the Dartford Warbler ( C. undata) preferred areas with low (<50%) vegetation cover; and the Subalpine Warbler ( C. cantillans) was present in areas with scrubs and low (<50%) vegetation cover, avoiding crops. The compositional analysis showed that the species used different vegetation types, in relation to their availability and that the selection differed between species. The Sardinian Warbler was the only species which showed spatial variation in reproductive habitat selection. Our results evidence that the studied warbler species select and avoid different types of vegetation in relation to their specific requirements and the present habitat structure. This represents valuable information to understand the composition of local communities and the reproductive habitat selection of the studied species.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"27 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139263459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ground-dwelling birds are one of the most vulnerable taxa. These birds are also under-studied and therefore constitute the lesser-known group of aves. Understanding their patterns of resource selection and their relationship with the composites of their habitat is a prerequisite for ensuring the effectiveness of future conservation efforts. Hill partridge ( Arborophila torqueola) is distributed in a vast range throughout the Himalayas to South-East Asia but knowledge about its micro-habitat is provided by only a single short term study from China. Their sulking behavior and inconspicuous habitat type make it extremely challenging to study them closely. However, with the advent of camera traps, it was possible to observe them meticulously during this study. We attempted to discern the patterns of its habitat selection, and its relationship with various vegetative and non-vegetative components. This study revealed a complex pattern of habitat selection by hill partridge. They preferred habitat with a greater canopy and bamboo cover. It inhabited forests dominated by oak trees in combination with other trees. They were virtually absent from the sites that showed higher bare-ground percentages.
{"title":"Assessing Micro-habitat Preferences of Hill Partridge (<i>Arborophila torqueola</i>) in the Central Himalayan landscape of India","authors":"Avantika Thapa, Bheem Dutt Joshi, Mukesh Thakur, Lalit Kumar Sharma","doi":"10.1177/17581559231212109","DOIUrl":"https://doi.org/10.1177/17581559231212109","url":null,"abstract":"Ground-dwelling birds are one of the most vulnerable taxa. These birds are also under-studied and therefore constitute the lesser-known group of aves. Understanding their patterns of resource selection and their relationship with the composites of their habitat is a prerequisite for ensuring the effectiveness of future conservation efforts. Hill partridge ( Arborophila torqueola) is distributed in a vast range throughout the Himalayas to South-East Asia but knowledge about its micro-habitat is provided by only a single short term study from China. Their sulking behavior and inconspicuous habitat type make it extremely challenging to study them closely. However, with the advent of camera traps, it was possible to observe them meticulously during this study. We attempted to discern the patterns of its habitat selection, and its relationship with various vegetative and non-vegetative components. This study revealed a complex pattern of habitat selection by hill partridge. They preferred habitat with a greater canopy and bamboo cover. It inhabited forests dominated by oak trees in combination with other trees. They were virtually absent from the sites that showed higher bare-ground percentages.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"11 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136161107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Males of Indian Peafowl are known for their extravagant courtship display used to attract mates. The displays are seen in absence of potential mates as well. This study investigates various contexts in which display behaviours are shown by Indian peafowl. Upto 70% of displays were observed in absence of potential mates. High frequency of displays in presence of other males and longer display bouts during the month of May when mating rarely happens, indicated that display behaviours might have a role to play in male-male competition or territory defence in addition to the female mate choice. The males establish and maintain their courtship display territories throughout the breeding season. Earlier studies assume that the choice of location does not depend on any resources as the species has a lek mating system. How these display sites are chosen is still a question. In this study, we investigated factors that might be important for the selection of display sites in a free-ranging Indian Peafowl population. It was observed that display sites were more concentrated within a radius of 300 meters of the food provisioning site and/ or a water resource and the number decreased considerably beyond the 300 m radius of food and water resources. Overall, the selection of display sites is non-random and highlights the importance of resources in the choice of display territories. The spatial organisation of leks in our study indicate that the mating system in Indian peafowl may be resource-based lek.
{"title":"Rethinking the functions of peacock’s display and lek organisation in native populations of Indian Peafowl <i>Pavo cristatus</i>","authors":"Dhanashree Ashok Paranjpe, Vedanti Rajiv Mahimkar, Priyanka Dange","doi":"10.1177/17581559231206733","DOIUrl":"https://doi.org/10.1177/17581559231206733","url":null,"abstract":"Males of Indian Peafowl are known for their extravagant courtship display used to attract mates. The displays are seen in absence of potential mates as well. This study investigates various contexts in which display behaviours are shown by Indian peafowl. Upto 70% of displays were observed in absence of potential mates. High frequency of displays in presence of other males and longer display bouts during the month of May when mating rarely happens, indicated that display behaviours might have a role to play in male-male competition or territory defence in addition to the female mate choice. The males establish and maintain their courtship display territories throughout the breeding season. Earlier studies assume that the choice of location does not depend on any resources as the species has a lek mating system. How these display sites are chosen is still a question. In this study, we investigated factors that might be important for the selection of display sites in a free-ranging Indian Peafowl population. It was observed that display sites were more concentrated within a radius of 300 meters of the food provisioning site and/ or a water resource and the number decreased considerably beyond the 300 m radius of food and water resources. Overall, the selection of display sites is non-random and highlights the importance of resources in the choice of display territories. The spatial organisation of leks in our study indicate that the mating system in Indian peafowl may be resource-based lek.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.1177/17581559231196433
Manuela S. Rodrigues, J. A. Alves, J. Ramos, P. Araújo
The Eurasian Spoonbill Platalea leucorodia is currently experiencing an increasing population trend in Western Europe and colonising areas in its breeding range. In this study we assessed the diet and trophic ecology of spoonbill chicks in Portuguese colonies (Ria Formosa and Tagus Estuary) occupied at different years during the population expansion in the country. We accomplished this by combining diet analysis with blood and feather stable isotopic analysis. Spoonbills from the Portuguese colonies relied mainly (but not exclusively) on crustaceans (Ria Formosa = 75%, Tagus Estuary = 72.5%) and fish (Ria Formosa = 17.11%, Tagus Estuary = 37.50%) to feed their chicks. Crustaceans seems to be the most important prey group. Nevertheless, chicks from Ria Formosa were fed with prey from a higher trophic level than chicks from Tagus Estuary. In both colonies chicks were fed with available in habitats near the colony, although in Tagus Estuary most prey originated from freshwater habitats. Diet of chicks remained constant through the development period and the proportions of crustaceans and fish consumed differed from other colonies elsewhere in Western Europe (Spain and the Netherlands). We conclude that in Portugal, spoonbills feed their chicks with prey commonly found in the vicinity of colonies. Prey originating from artificial habitats, particularly the invasive Louisiana crayfish Procambarus clarkii in the more recently occupied colony, were the most important items in the diet of chicks.
{"title":"Exploring the variation in spoonbill chick diet and trophic niches between traditional and recently colonised sites in Portugal","authors":"Manuela S. Rodrigues, J. A. Alves, J. Ramos, P. Araújo","doi":"10.1177/17581559231196433","DOIUrl":"https://doi.org/10.1177/17581559231196433","url":null,"abstract":"The Eurasian Spoonbill Platalea leucorodia is currently experiencing an increasing population trend in Western Europe and colonising areas in its breeding range. In this study we assessed the diet and trophic ecology of spoonbill chicks in Portuguese colonies (Ria Formosa and Tagus Estuary) occupied at different years during the population expansion in the country. We accomplished this by combining diet analysis with blood and feather stable isotopic analysis. Spoonbills from the Portuguese colonies relied mainly (but not exclusively) on crustaceans (Ria Formosa = 75%, Tagus Estuary = 72.5%) and fish (Ria Formosa = 17.11%, Tagus Estuary = 37.50%) to feed their chicks. Crustaceans seems to be the most important prey group. Nevertheless, chicks from Ria Formosa were fed with prey from a higher trophic level than chicks from Tagus Estuary. In both colonies chicks were fed with available in habitats near the colony, although in Tagus Estuary most prey originated from freshwater habitats. Diet of chicks remained constant through the development period and the proportions of crustaceans and fish consumed differed from other colonies elsewhere in Western Europe (Spain and the Netherlands). We conclude that in Portugal, spoonbills feed their chicks with prey commonly found in the vicinity of colonies. Prey originating from artificial habitats, particularly the invasive Louisiana crayfish Procambarus clarkii in the more recently occupied colony, were the most important items in the diet of chicks.","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"16 1","pages":"83 - 91"},"PeriodicalIF":0.6,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43219013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-01DOI: 10.1177/17581559231198765
María Emilia Rebollo, F. López, Rocío Lapido, L. Bragagnolo, Pablo Díaz Peñalba, Marcos Matías Reyes, Paula Maiten Orozco Valor, M. Santillán, M. Galmes, Isabel María Luque Romero, M. Liébana, J. Grande
The monogamous mating system, where a male and a female constitute the reproductive unit and share the parental care, predominates among bird reproductive strategies. However, there are also other mating systems with diverse parental care roles which may have implications for population breeding success and be relevant for their management and conservation. We evaluated the family group structure of the Yellow Cardinal (Gubernatrix cristata) in La Pampa province of central Argentina. During the 2020–2021 breeding season we carried out 280 bird surveys to search for the presence of Yellow Cardinals. We registered 87 individuals (11 solitary individuals, 12 pairs, two males together, and 13 family groups). Most family groups corresponded to the typical monogamous structure, but two family groups (8%) were composed of two adult males, an adult female and at least a juvenile. We also explored 1646 Yellow Cardinal records at citizen science platforms and none of them included a family group with more than two adults. Even so, it would be feasible to release seized groups of two males together, to promote breeding success. Further studies are necessary to evaluate the causes of the presence of extra males and their incidence on the breeding performance of this globally endangered species. This may help to understand its natural history and for planning management and conservation actions. Graphical Abstract
{"title":"Family group structure of the endangered Yellow Cardinal (Gubernatrix cristata)","authors":"María Emilia Rebollo, F. López, Rocío Lapido, L. Bragagnolo, Pablo Díaz Peñalba, Marcos Matías Reyes, Paula Maiten Orozco Valor, M. Santillán, M. Galmes, Isabel María Luque Romero, M. Liébana, J. Grande","doi":"10.1177/17581559231198765","DOIUrl":"https://doi.org/10.1177/17581559231198765","url":null,"abstract":"The monogamous mating system, where a male and a female constitute the reproductive unit and share the parental care, predominates among bird reproductive strategies. However, there are also other mating systems with diverse parental care roles which may have implications for population breeding success and be relevant for their management and conservation. We evaluated the family group structure of the Yellow Cardinal (Gubernatrix cristata) in La Pampa province of central Argentina. During the 2020–2021 breeding season we carried out 280 bird surveys to search for the presence of Yellow Cardinals. We registered 87 individuals (11 solitary individuals, 12 pairs, two males together, and 13 family groups). Most family groups corresponded to the typical monogamous structure, but two family groups (8%) were composed of two adult males, an adult female and at least a juvenile. We also explored 1646 Yellow Cardinal records at citizen science platforms and none of them included a family group with more than two adults. Even so, it would be feasible to release seized groups of two males together, to promote breeding success. Further studies are necessary to evaluate the causes of the presence of extra males and their incidence on the breeding performance of this globally endangered species. This may help to understand its natural history and for planning management and conservation actions. Graphical Abstract","PeriodicalId":55408,"journal":{"name":"Avian Biology Research","volume":"16 1","pages":"92 - 96"},"PeriodicalIF":0.6,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42973666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：