Inferred kinship patterns reveal low levels of extra-pair paternity in the endangered Neotropical Jabiru Stork (Jabiru mycteria, Aves: Ciconiiformes)

Lopes, Iara F.; Rocha, Cristiano Dosualdo; Oliveira, Dalci M. M.; Lama, Sílvia Nassif Del

doi:10.1007/s10709-013-9718-5

Cited by 12 publications

(10 citation statements)

References 44 publications

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“…The

{\overset{N}{true}}_{normalb} / {\overset{N}{true}}_{normala}

ratios (Table ) were below the mean of 0.225 reported in a previous quantitative survey (Palstra & Fraser, ), except those calculated using

{\overset{true^}{N}}_{b}

computed with the SA method for SG2 and the LD method overall. Nonetheless,

{\overset{N}{true}}_{normalb} / {\overset{N}{true}}_{normala}

ratios obtained in wood storks were often close to

{\overset{N}{true}}_{normale} / {\overset{N}{true}}_{normalc}

ratios reported for rare and endangered bird species (often <0.1) (e.g., Brekke, Bennett, Santure, & Ewen, ; Lopes, Miño, Rocha, Oliveira, & Del Lama, ; Ramstad, Colbourne, Robertson, Allendorf, & Daugherty, ).…”

Section: Discussionsupporting

confidence: 72%

“…Nonetheless, N b ∕N a ratios obtained in wood storks were often close to N e ∕N c ratios reported for rare and endangered bird species (often <0.1) (e.g., Brekke, Bennett, Santure, & Ewen, 2011;Lopes, Miño, Rocha, Oliveira, & Del Lama, 2013;Ramstad, Colbourne, Robertson, Allendorf, & Daugherty, 2013).…”

Section: Estimates Of N a And N B For Natural Populationssupporting

confidence: 72%

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Considerations for monitoring population trends of colonial waterbirds using the effective number of breeders and census estimates

Silva

Izbicki

Lama

2018

Ecology and Evolution

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Detecting trends in population size fluctuations is a major focus in ecology, evolution, and conservation biology. Populations of colonial waterbirds have been monitored using demographic approaches to determine annual census size (N a). We propose the addition of genetic estimates of the effective number of breeders (N b) as indirect measures of the risk of loss of genetic diversity to improve the evaluation of demographics and increase the accuracy of trend estimates in breeding colonies. Here, we investigated which methods of the estimation of N b are more precise under conditions of moderate genetic diversity, limited sample sizes and few microsatellite loci, as often occurs with natural populations. We used the wood stork as a model species and we offered a workflow that researchers can follow for monitoring bird breeding colonies. Our approach started with simulations using five estimators of N b and the theoretical results were validated with empirical data collected from breeding colonies settled in the Brazilian Pantanal wetland. In parallel, we estimated census size using a corrected method based on counting active nests. Both in simulations and in natural populations, the approximate Bayesian computation (ABC) and sibship assignment (SA) methods yielded more precise estimates than the linkage disequilibrium, heterozygosity excess, and molecular coancestry methods. In particular, the ABC method performed best with few loci and small sample sizes, while the other estimators required larger sample sizes and at least 13 loci to not underestimate N b. Moreover, according to our N b/N a estimates (values were often ≤0.1), the wood stork colonies evaluated could be facing the loss of genetic diversity. We demonstrate that the combination of genetic and census estimates is a useful approach for monitoring natural breeding bird populations. This methodology has been recommended for populations of rare species or with a known history of population decline to support conservation efforts.

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“…The

{\overset{N}{true}}_{normalb} / {\overset{N}{true}}_{normala}

ratios (Table ) were below the mean of 0.225 reported in a previous quantitative survey (Palstra & Fraser, ), except those calculated using

{\overset{true^}{N}}_{b}

computed with the SA method for SG2 and the LD method overall. Nonetheless,

{\overset{N}{true}}_{normalb} / {\overset{N}{true}}_{normala}

ratios obtained in wood storks were often close to

{\overset{N}{true}}_{normale} / {\overset{N}{true}}_{normalc}

Section: Discussionsupporting

confidence: 72%

Section: Estimates Of N a And N B For Natural Populationssupporting

confidence: 72%

Considerations for monitoring population trends of colonial waterbirds using the effective number of breeders and census estimates

Silva

Izbicki

Lama

2018

Ecology and Evolution

Self Cite

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“…; 0.09 in jabiru stork Jabiru mycteria , Lopes et al . ). Given this wide range in avian N e / N c ranges, we cannot determine whether the low ratio in P. cabanisi reflects its cooperative mating system in the study area, other mechanisms related to its threat status, or a combination of both.…”

Section: Discussionmentioning

confidence: 97%

“…In contrast, rare and endangered species generally show much lower ratios, often below 0.1 (e.g. 0.03 in little spotted kiwi Apteryx owenii, Ramstad et al 2013; 0.09 in jabiru stork Jabiru mycteria, Lopes et al 2013). Given this wide range in avian N e /N c ranges, we cannot determine whether the low ratio in P. cabanisi reflects its cooperative mating system in the study area, other mechanisms related to its threat status, or a combination of both.…”

Section: N E To N C Ratiomentioning

confidence: 99%

Post‐fragmentation population structure in a cooperative breeding Afrotropical cloud forest bird: emergence of a source‐sink population network

et al. 2015

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The impact of demographic parameters on the genetic population structure and viability of organisms is a long-standing issue in the study of fragmented populations. Demographic and genetic tools are now readily available to estimate census and effective population sizes and migration and gene flow rates with increasing precision. Here we analysed the demography and genetic population structure over a recent 15-year time span in five remnant populations of Cabanis's greenbul (Phyllastrephus cabanisi), a cooperative breeding bird in a severely fragmented cloud forest habitat. Contrary to our expectation, genetic admixture and effective population sizes slightly increased, rather than decreased between our two sampling periods. In spite of small effective population sizes in tiny forest remnants, none of the populations showed evidence of a recent population bottleneck. Approximate Bayesian modelling, however, suggested that differentiation of the populations coincided at least partially with an episode of habitat fragmentation. The ratio of meta-Ne to meta-Nc was relatively low for birds, which is expected for cooperative breeding species, while Ne /Nc ratios strongly varied among local populations. While the overall trend of increasing population sizes and genetic admixture may suggest that Cabanis's greenbuls increasingly cope with fragmentation, the time period over which these trends were documented is rather short relative to the average longevity of tropical species. Furthermore, the critically low Nc in the small forest remnants keep the species prone to demographic and environmental stochasticity, and it remains open if, and to what extent, its cooperative breeding behaviour helps to buffer such effects.

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“…Genetic methods allow us to overcome the potential shortcomings of purely observational studies when determining a given species’ mating system81314. Despite the wide-spread occurrence of social monogamy across avian species, recent research has found strict genetic monogamy to be the exception rather than the rule (e.g 2356789151617181920…”

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confidence: 99%

Extra-pair paternity in the socially monogamous white stork (Ciconia ciconia) is fairly common and independent of local density

Turjeman

Centeno‐Cuadros

Eggers

et al. 2016

Sci Rep

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Although many birds are socially monogamous, most (>75%) studied species are not strictly genetically monogamous, especially under high breeding density. We used molecular tools to reevaluate the reproductive strategy of the socially monogamous white stork (Ciconia ciconia) and examined local density effects. DNA samples of nestlings (Germany, Spain) were genotyped and assigned relationships using a two-program maximum likelihood classification. Relationships were successfully classified in 79.2% of German (n = 120) and 84.8% of Spanish (n = 59) nests. For each population respectively, 76.8% (n = 73) and 66.0% (n = 33) of nests contained only full-siblings, 10.5% (n = 10) and 18.0% (n = 9) had half-siblings (at least one nestling with a different parent), 3.2% (n = 3) and 10.0% (n = 5) had unrelated nestlings (at least two nestlings, each with different parents), and 9.5% (n = 9) and 6.0% (n = 3) had “not full-siblings” (could not differentiate between latter two cases). These deviations from strict monogamy place the white stork in the 59th percentile for extra-pair paternity among studied bird species. Although high breeding density generally increases extra-pair paternity, we found no significant association with this species’ mating strategies. Thus although genetic monogamy is indeed prominent in the white stork, extra-pair paternity is fairly common compared to other bird species and cannot be explained by breeding density.

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Inferred kinship patterns reveal low levels of extra-pair paternity in the endangered Neotropical Jabiru Stork (Jabiru mycteria, Aves: Ciconiiformes)

Cited by 12 publications

References 44 publications

Considerations for monitoring population trends of colonial waterbirds using the effective number of breeders and census estimates

Considerations for monitoring population trends of colonial waterbirds using the effective number of breeders and census estimates

Post‐fragmentation population structure in a cooperative breeding Afrotropical cloud forest bird: emergence of a source‐sink population network

Extra-pair paternity in the socially monogamous white stork (Ciconia ciconia) is fairly common and independent of local density

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