Sexual dimorphism of Latham's Snipe (<i>Gallinago hardwickii</i>)

Ura, Tatsuya; Azuma, Noriko; Hayama, Seiji; Higashi, Seigo

doi:10.1071/mu04019

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…At least in the Latham’s Snipe Gallinago hardwickii , the number differs between sexes (Ura et al . 2005). In the Common Snipe and Wilson's Snipe, males seemed to have relatively more rectrices compared with females in multivariate analysis but the number of rectrices alone did not differ between sexes (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Phenotypic divergence in two sibling species of shorebird: Common Snipe and Wilson’s Snipe (Charadriiformes: Scolopacidae)

Rodrigues

Miller²,

Drovetski

et al. 2020

Ibis

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Section: Discussionmentioning

confidence: 99%

Phenotypic divergence in two sibling species of shorebird: Common Snipe and Wilson’s Snipe (Charadriiformes: Scolopacidae)

Rodrigues

Miller²,

Drovetski

et al. 2020

Ibis

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“…DNA concentration was confirmed using Nanodrop One Microvolume UV–Vis Spectrophotometers (Thermo Fisher Scientific, MA, USA) and adjusted to a final concentration of 50 ng/μl. For Swinhoe's snipes and Latham's snipes, molecular sexing was done using a previously-described polymerase chain reaction (PCR) protocol targeting the chromo-helicase DNA ( CHD ) 1 gene ( Fridolfsson and Ellegren, 1999 ; Ura et al, 2005 ). Using the primers 2550 F and 2718 R, a PCR reaction was carried out.…”

Section: Methodsmentioning

confidence: 99%

“…Juveniles were excluded because adults and juveniles are known to have varying biometrics ( Prater et al, 2007 ). Because sexual dimorphism is known in these species ( Frith et al, 1977 ; Prater et al, 2007 ; Ura et al, 2005 ), males and females were individually tested. Additionally, because seasonal variations in metabolic rates are known in many species ( Bairlein, 2002 ; Frith et al, 1977 ; Jenni-Eiermann et al, 2002 ; Kvist and Lindström, 2001 ), fat score and body mass were evaluated separately for autumn and spring.…”

Section: Methodsmentioning

confidence: 99%

“…In these energy-demanding behaviors, maintaining good physical conditions is crucial to win partners. Additionally, during display flights, snipes use their tail feathers to create characteristic buzzing sounds ( Byrkjedal, 1990 ; Morozov, 2004 ; Nakamura and Shigemori, 1990 ), and it is suggested that the tail length and number of feathers may have impacts on mating success ( Ura et al, 2005 ). If such negative effects are present in infected snipes, they may indirectly affect reproductive success.…”

Section: Introductionmentioning

confidence: 99%

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First records of prevalence and diversity of avian haemosporidia in snipe species (genus Gallinago) of Japan

Inumaru

Odaya

Sato

et al. 2021

International Journal for Parasitology: Parasites and Wildlife

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Migratory birds are important carriers of pathogens such as viruses, bacteria and protozoa. Avian haemosporidia have been detected from many wild birds of Japan, but the infection status of migratory birds and transmission area are still largely unknown. Gallinago snipes are long-distance migratory shorebirds, and five species migrate to or through Japan, including Latham's snipe which is near threatened. Haemosporidian parasites in four snipe species were investigated to understand the role of migratory birds in the transmission of avian haemosporidia. Namely, this study aimed: i) to investigate differences in parasite prevalence and related factors explaining infection likelihood among these migratory species, ii) to explore the diversity in haemosporidian lineages and possible transmission areas, and iii) to assess the possibility of morphological effects of infection. Blood samples were collected from snipes caught in central and southwest Japan during migration. Parasites cyt b gene DNA were detected via PCR-based testing, and detected lineages were phylogenetically analyzed. Additionally, factors related to prevalence and morphological effects of infection were statistically tested. 383 birds from four Gallinago snipe species were caught, showing higher overall prevalence of avian haemosporidia (17.8 %) than reported in other wader species in previous studies. This high infection rate is presumably due to increased contact with vector insects, resultant of environmental preferences. The prevalence of Plasmodium spp. Was higher in Swinhoe's snipes, while Haemoproteus spp. Was higher in Latham's snipes. These differences are thought to be related to ecological factors including habitat use, distribution and migratory route. Six lineages detected from juveniles indicate transmission between the breeding and sampling area. Contrary to expectations, a direct link between morphological features and haemosporidian parasite infection were not detected. These findings provide valuable information for conservation of this endangered migratory bird group. Further studies linking biological and parasitological research are anticipated to contribute to conservational actions.

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“…We collected the following body measurements: tarsus length, wing chord length, tail and head-bill length. These measurements were selected as they are considered to be repeatable measures in the field, and have been successfully used in studies examining body condition and sexual dimorphism across a range of species (e.g., Iko et al 2004;Shephard et al 2004;Jakubas and Jakubas 2011;Ura et al 2016).…”

Section: Study Areas and Sample Sourcesmentioning

confidence: 99%

Morphometric and physiological development confirm skull ossification level as a reliable indicator of age in a passerine bird, the Noisy Miner

2022

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In birds, several physiological characters have been proposed and tested as possible criteria of age. Among them, skull development is likely to provide a valuable reflection of other physiological developments, however the relationship between skull ossification and other physiological and morphometric traits has rarely been quantified within species. Here, we investigated suitability of skull ossification as an indicator of age in Noisy Miners (Manorina melanocephala), an Australian passerine bird. We compared skull ossification with other age indicators including the bursa of Fabricius, gonadal development, and a range of commonly used body size measures that included wing length and tarsus length. We carried out morphological measurements on 1251 individual Noisy Miner carcasses that had been collected during a culling experiment in November, December and May 2015–2016 from north-eastern NSW, Australia. The probability of a bursa of Fabricius being present in an individual bird changed with skull ossification level, with a significant reduction in the size of the bursa of Fabricius correlating with the degree of skull ossification. In male Noisy Miners, birds that were at a later stage of skull ossification had significantly larger testis size than those with a lower stages of skull ossification. In females, ovary size increased significantly as skull ossification progressed. In both sexes, skull ossification level was also correlated with body mass and skeletal measures. Given this, the level of skull ossification in Noisy Miners accurately correlates with other age indicators, and can justifiably be used as a non-invasive aging method in the field for live birds.

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Sexual dimorphism of Latham's Snipe (Gallinago hardwickii)

Cited by 6 publications

References 8 publications

Phenotypic divergence in two sibling species of shorebird: Common Snipe and Wilson’s Snipe (Charadriiformes: Scolopacidae)

Phenotypic divergence in two sibling species of shorebird: Common Snipe and Wilson’s Snipe (Charadriiformes: Scolopacidae)

First records of prevalence and diversity of avian haemosporidia in snipe species (genus Gallinago) of Japan

Morphometric and physiological development confirm skull ossification level as a reliable indicator of age in a passerine bird, the Noisy Miner

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