scholarly journals Estimating Survival Probabilities of Unmarked Dependent Young When Detection is Imperfect

The Condor ◽  
2004 ◽  
Vol 106 (4) ◽  
pp. 926-931 ◽  
Author(s):  
Paul M. Lukacs ◽  
Victoria J. Dreitz ◽  
Fritz L. Knopf ◽  
Kenneth P. Burnham
Keyword(s):  
Survival Probability ◽  
Bird Species ◽  
Adult Bird ◽  
Imperfect Detection ◽  
Survival Probabilities ◽  
Modeling Approach ◽  
Precocial Bird ◽  
Charadrius Montanus ◽  
Capture Recapture

Abstract We present a capture–recapture modeling approach to the estimation of survival probability of dependent chicks when only the attending adult bird is marked. The model requires that the bird's nest is found prior to hatching and that the number of eggs that hatch are counted. Subsequent data are sightings of the marked adult and a count of chicks with the adult. The model allows for imperfect detection of chicks, but the number of chicks can never exceed the number of eggs in the nest (i.e., adults cannot adopt chicks). We use data from radio-tagged adult Mountain Plovers (Charadrius montanus) and their unmarked chicks as an example. We present the model in terms of precocial bird species, but the method extends to many other taxa. Estimación de las Probabilidades de Supervivencia de Crías Dependientes no Marcadas cuando la Detección es Imperfecta Resumen. Presentamos un enfoque de captura y recaptura para modelar la estimación de la probabilidad de supervivencia de polluelos dependientes cuando sólo el adulto que atiende a los polluelos esta marcado. El modelo requiere que el nido sea encontrado antes de la eclosión y que se cuenten el número de huevos que eclosionan. Los datos subsecuentes necesarios son los avistamientos del adulto marcado y el conteo de los polluelos que se encuentran con el adulto. El modelo permite la detección imperfecta de los polluelos, pero el número de polluelos nunca puede exceder el número de huevos en el nido (i.e., los adultos no pueden adoptar polluelos). Como ejemplo, utilizamos datos de adultos marcados con radio transmisores de Charadrius montanus y de sus polluelos no marcados. Presentamos el modelo en términos de especies de aves precociales, pero el método también se extiende a muchas otras especies.

scholarly journals Using a capture-recapture approach for modelling the detectability and distribution of Houbara Bustard in southern Tunisia

2011 ◽  
Vol 22 (3) ◽  
pp. 288-298 ◽  
Author(s):  
M. CHAMMEM ◽  
S. SELMI ◽  
T. KHORCHANI ◽  
S. NOUIRA
Keyword(s):  
Regression Analyses ◽  
Species Occurrence ◽  
Imperfect Detection ◽  
Southern Tunisia ◽  
Species Of Conservation Concern ◽  
Habitat Factors ◽  
Houbara Bustard ◽  
Capture Recapture ◽  
Conservation Concern ◽  
Free Ranging

SummaryModelling the distribution of species of conservation concern is an important issue in population ecology. Classically, logistic regression analyses are conducted to estimate species’ distributions from detection/non-detection data in a sample of sites and to test for the significance of several environmental variables in predicting the probability of occurrence. These modelling approaches assume that species detection probability is constant and equals one in all sampled sites, which is critical, notably in the case of rare, shy and cryptic species. The capture-recapture-like approach developed by Mackenzie et al. (2002, 2003) provides a reliable tool that accounts for imperfect detection when estimating species occurrence, as well as for assessing the relevance of site features as predictors of species occurrence probability. The aim of this study was to explore the possibility of using this approach in the context of Houbara Bustard Chlamydotis undulata in southern Tunisia. Our results show once more the low detectability of this emblematic species and stress the need to take this factor into account when estimating Houbara spatial distribution. The distribution of Houbara in southern Tunisia is more likely to be shaped by human-related than by habitat factors. In particular, Houbara occurrence was positively associated with site remoteness and camel numbers. Houbara seemed to avoid areas with high human presence and shared the most remote and agriculture-free zones with free-ranging camels.

scholarly journals Effects of traffic noise exposure on corticosterone, glutathione and tonic immobility in chicks of a precocial bird

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Romina Flores ◽  
Mario Penna ◽  
John C Wingfield ◽  
Elfego Cuevas ◽  
Rodrigo A Vásquez ◽  
...  
Keyword(s):  
Stress Response ◽  
Stress Responses ◽  
Noise Exposure ◽  
Tonic Immobility ◽  
Traffic Noise ◽  
Bird Species ◽  
Urban Environments ◽  
Acoustic Environment ◽  
Precocial Bird ◽  
Baseline Levels

Abstract Repeated exposure to traffic noise may be perceived as a succession of stressors, and therefore, noisy urban environments could lead to a state of chronic stress. In developing animals, glucocorticoids can have organizational effects on the hypothalamic–pituitary–adrenal axis in addition to the classic activation effects, so evaluating the effect of traffic noise during development is urgently needed. To our knowledge, to date six studies have investigated the effects of traffic noise on baseline corticosterone (CORT) and/or the stress response in birds during development; however, these studies were performed in nestling (altricial species), where confounding factors (e.g. communication between nestlings and parents) could mask the real impact of traffic noise on stress. In this study, we evaluated the effect of traffic noise (traffic noise group vs. rural noise group) on baseline levels of CORT and stress responses in chicks of a precocial bird species, the Japanese quail (Coturnix japonica). Because CORT can also decrease glutathione (GSH) levels (antioxidant and neurotransmitter/modulator), secondly by means of path analysis we investigated whether the strength of the association between CORT levels, GSH levels and tonic immobility (TI) varied in relation to treatment. We observed (i) similar baseline levels of CORT in both groups, (ii) a trend toward higher stress response in the traffic noise group (P = 0.08), (iii) similar TI duration in both groups, (iv) higher GSH levels in the traffic noise group and (v) differences in the strength and sign of the associations in relation to the treatment (traffic vs. rural). We conclude that the acoustic environment perceived during development has implications for physiology and behaviour; as more research is done on this topic, the need for sustainable urban planning will become clearer.

scholarly journals Habitat Occupancy by Spruce Grouse (Canachites canadensis) in the south of its range, Québec, Canada

2021 ◽  
Author(s):  
Clara Casabona i Amat ◽  
Pierre Blanchette ◽  
André Desrochers
Keyword(s):  
Bird Species ◽  
Probability Of Detection ◽  
Coniferous Forests ◽  
Range Limit ◽  
Isolated Populations ◽  
Imperfect Detection ◽  
Occupancy Modelling ◽  
Habitat Occupancy ◽  
Management Measures ◽  
Temperate Deciduous Forests

Studying habitat occupancy at the margins of species’ distributions can be helpful in clarifying species’ requirements and planning management measures. Spruce grouse (Canachites canadensis Linnaeus, 1758), a bird species associated with northern short-needle coniferous forests in North America, has its southeastern range limit where coniferous forests are mixed with temperate deciduous forests and agricultural lands. Some isolated populations are found in these habitats. Using a single-season occupancy modelling approach, we investigated habitat use by spruce grouse, accounting for imperfect detection, in the lowlands of the St. Lawrence River in southern Québec, Canada. We conducted call-response spruce over three years at 279 sites (59 sites in 2007, 100 sites in 2008 and 120 sites in 2009). At the site level, the probability of occupancy was 21% (IC: 10.7% - 37.9%) and probability of detection was 54% (IC: 34.7% - 73.0%). Based on the covariates in the models, occurrence increased with higher cover of coniferous trees and low deciduous shrubs, and decreased with higher cover of deciduous trees. Finally, detection probability was highest at the beginning of the survey (50% in late April) and was influenced by year.

The Relationship Between Body Mass and Survival of Wintering Canvasbacks

The Auk ◽  
1986 ◽  
Vol 103 (3) ◽  
pp. 506-514 ◽  
Author(s):  
G. M. Haramis ◽  
J. D. Nichols ◽  
K. H. Pollock ◽  
J. E. Hines
Keyword(s):  
Body Mass ◽  
Survival Probability ◽  
Alternative Explanation ◽  
Small Sample Size ◽  
Small Sample ◽  
Cold Weather ◽  
Early Winter ◽  
Adult Males ◽  
Annual Survival ◽  
Survival Probabilities

Abstract Mass and recapture histories of 6,000 Canvasbacks (Aythya valisineria) banded in upper Chesapeake Bay were used to test two hypotheses: (1) early-winter body mass is associated with the probability of surviving the winter, and (2) early-winter body mass is associated with annual survival probability. Data were analyzed by a binary regression method that treated mass as a continuous variable and estimated parameters to describe a general relationship between body mass and survival probability. Results for adult males, which provided our largest data sets, presented strong evidence that birds with high relative early-winter masses had both greater overwinter and annual survival probabilities. Results of overwinter analyses necessarily are qualified by the alternative explanation of mass-dependent emigration, i.e. the possibility that lighter birds move south in response to cold weather and leave only heavy birds for recapture. Such a phenomenon remains to be documented. Results concerning annual survival probabilities are not vulnerable to this alternative explanation because of the strong fidelity of Canvasbacks at the banding site. Because of small sample size, data were inadequate to permit mass/survival inferences for adult females. Sample sizes were adequate for young Canvasbacks, but the results were less consistent than for adult males. Although early-winter body mass was associated positively with overwinter as well as annual survival for young Canvasbacks in some years, we suspect that the lack of established wintering patterns among these birds may underlie the less consistent result.

scholarly journals Probit models for capture–recapture data subject to imperfect detection, individual heterogeneity and misidentification

2014 ◽  
Vol 8 (4) ◽  
pp. 2461-2484 ◽  
Author(s):  
Brett T. McClintock ◽  
Larissa L. Bailey ◽  
Brian P. Dreher ◽  
William A. Link
Keyword(s):  
Individual Heterogeneity ◽  
Imperfect Detection ◽  
Probit Models ◽  
Capture Recapture ◽  
Data Subject

scholarly journals Multiscale effects of wetland availability and matrix composition on wetland breeding birds in Minnesota, USA

The Condor ◽  
2019 ◽  
Vol 121 (3) ◽  
Author(s):  
Sarah P Saunders ◽  
Kristin A L Hall ◽  
Nina Hill ◽  
Nicole L Michel
Keyword(s):  
Spatial Scale ◽  
Habitat Management ◽  
Spatial Scales ◽  
Bird Species ◽  
Matrix Composition ◽  
Bird Diversity ◽  
Bird Conservation ◽  
Prairie Pothole ◽  
Imperfect Detection ◽  
Matrix Habitat

Abstract The increasing intensity of wetland stressors in the Upper Midwestern United States hastens the need to understand how matrix composition influences wetland bird occurrence and abundance. The optimal spatial scale for assessing species–habitat relationships is not always apparent, but may affect inference about wetland use and suitability. We developed occupancy and abundance models, accounting for imperfect detection, for 9 wetland bird species breeding in Minnesota. We evaluated land cover associations at 3 spatial scales (12.6 ha, 50.3 ha, and 4,000 ha), quantified species-specific sensitivity to wetland availability and matrix habitat composition (agricultural and developed land covers), and assessed ecoregional variation in occupancy and abundance. Amount of wetland cover was positively associated with occupancy of 89% of species and with abundance of 67% of species, but the spatial scale of support differed among species. American Bittern (Botaurus lentiginosus), Pied-billed Grebe (Podilymbus podiceps), and Wilson’s Snipe (Gallinago delicata) in particular were negatively impacted by anthropogenic land uses within the surrounding matrix, indicating a need to shift wetland conservation planning from the site scale to the landscape scale to capture pertinent drivers of wetland bird habitat use. Mean expected occupancy across all species was greatest in the Prairie Pothole Region (PPR), suggesting that restoration efforts within this ecoregion are likely to maintain wetland bird diversity. However, given the minimal total wetland availability and predominantly agricultural matrix in the PPR, protecting wetlands and upland buffers in the Aspen Parklands or Boreal ecoregions may represent a better investment for agricultural-sensitive species such as American Bittern, Sandhill Crane (Antigone canadensis), and Wilson’s Snipe. Our modeling approach provides a multi-species framework for identifying habitat management priorities; future applications at broader spatial extents can continue to improve wetland bird conservation in a region with high rates of wetland loss and degradation.

scholarly journals Testing hypotheses in evolutionary ecology with imperfect detection: capture–recapture structural equation modeling

Ecology ◽  
2012 ◽  
Vol 93 (2) ◽  
pp. 248-255 ◽  
Author(s):  
Sarah Cubaynes ◽  
Claire Doutrelant ◽  
Arnaud Grégoire ◽  
Philippe Perret ◽  
Bruno Faivre ◽  
...  
Keyword(s):  
Structural Equation Modeling ◽  
Structural Equation ◽  
Evolutionary Ecology ◽  
Equation Modeling ◽  
Imperfect Detection ◽  
Testing Hypotheses ◽  
Capture Recapture

Local survival after fire in Mediterranean shrublands: combining capture-recapture data over several bird species

2003 ◽  
Vol 45 (3) ◽  
pp. 187-196 ◽  
Author(s):  
Pere Pons ◽  
Pierre-Yves Henry ◽  
Gabriel Gargallo ◽  
Roger Prodon ◽  
Jean-Dominique Lebreton
Keyword(s):  
Bird Species ◽  
Mediterranean Shrublands ◽  
Local Survival ◽  
Capture Recapture

Assessing tag loss and survival probabilities in green turtles (Chelonia mydas) nesting in Malaysia

2017 ◽  
Vol 98 (4) ◽  
pp. 961-972 ◽  
Author(s):  
Hideaki Nishizawa ◽  
Juanita Joseph ◽  
Vicki Yii-Ching Chew ◽  
Hock-Chark Liew ◽  
Eng-Heng Chan
Keyword(s):  
Confidence Interval ◽  
Survival Probability ◽  
Loss Rate ◽  
Chelonia Mydas ◽  
Loss Probability ◽  
Population Status ◽  
Mark Recapture ◽  
Survival Probabilities ◽  
Green Turtles ◽  
Tag Loss

The loss of external tags is one of the biggest problems in mark-recapture research. An evaluation of tag loss is therefore required to improve tagging methodology, select appropriate tag types, and accurately estimate population status and dynamics. We estimated tag loss probability of double-tagged green turtles (Chelonia mydas) nesting at Redang Island, Malaysia (05°49′ N 103°00′ E), from 1993–2014. For both titanium and Inconel tags, we found a tag loss pattern with a high initial tag loss rate that decreased to an asymptote near a constant value above zero. The initial tag loss probability for titanium tags was higher than for Inconel tags, and titanium tags were lost earlier than Inconel tags in more individuals when both types of tags were attached. In addition, comparison of the tag loss probability of Inconel tags attached during the period when tagging staff changed every year to that when senior tagging staff were not changed, indicated that lack of consistency in tagging staff affected the application of at least one of two Inconel tags. Estimated tag loss probability was incorporated into a recapture model, and annual survival probability was estimated to be 0.893 (95% confidence interval: 0.857–0.921).

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