1,720,985 research outputs found
PS_Longevity [Dataset]
No full textTable 1. Notation and biological meaning of data, latent states and parameters.1. The "data.Rdata" file contains the clean data of the study to run the model. -- 2. "Best_model_code.txt" file contains the best selected JAGS model. -- 3. "model_run.R" contains the script to run the model.Peer reviewe
Life span, growth, senescence and island syndrome: Accounting for imperfect detection and continuous growth
No full textSmall vertebrates on islands are expected to attain a larger body size, and a greater survival than their mainland counterparts. Comparative studies have questioned whether lizards exhibit this set of adaptations, referred to as the 'island syndrome'. We collected data on 730 individuals the endemic Lilford's lizard Podarcis lilfordi throughout a 10-year period on a small island of the Balearic archipelago (Spain). We coupled a growth function with a capture-mark-recapture model to simultaneously estimate size- and sex-dependent growth rate and survival. To put our results into a wider context, we conducted a systematic review of growth, life span and age at maturity in different Podarcis species comparing insular and mainland populations. We found a low average growth coefficient (0.56 and 0.41 year-1 for males and females to reach an asymptotic size of 72.3 and 65.6 mm respectively), a high annual survival probability of 0.81 and 0.79 in males and females, and a large variability between individuals in growth parameters. Survival probability decreased with body size in both sexes, indicating a senescence pattern typical of long-lived species or in populations with a low extrinsic mortality. Assuming a constant survival after sexual maturity, at about 2 years old, the average life span was 6.18 years in males and 8.99 in females. The oldest animal was a male last captured at an estimated age of ≥13 years and still alive at the end of the study. Our results agree with the predictions of the 'island syndrome' for survival, life span and growth parameters. A comparative analysis of these values across 29 populations of 16 different species of Podarcis indicated that insular lizards grow slower and live longer than their mainland counterparts. However, our data differed from other island populations of the same species, suggesting that island-specific characteristics play an additional role to isolation. Within this study we developed an analytical approach to study the body size-dependent survival of small reptiles. We discuss its applicability to contrast hypotheses on senescence in different sexes of this species, and provide the code used to integrate the growth and capture-mark-recapture models.The research was partially funded by the Government of the Balearic Islands (project number: PRD2018/25).Peer reviewe
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Data supporting the article "Temporal and spatial heterogeneity in dispersal and demography of a long-lived philopatric seabird"
No full text[Description of methods used for collection/generation of data]
- Monitoring of Storm Petrel nests in the Cap d Es Migdia cave.
- Capture recapture of adults using hand capture.
- Tick counts on chicks (2018 2020).
- Recording of breeding success, nest fidelity, and individual recaptures.[Methods for processing the data]
- Data cleaning and structuring in R.
- GLMMs fitted using the glmmTMB package.
- Multievent capture recapture models fitted in E-SURGE.
- Population matrix modelling performed in R.1.Individuals make habitat selection decisions at different moments of their life and in heterogeneous habitats. Understanding the links between environmental changes and demographic patterns during the individuals’ life is therefore critical to predict long term eco-evolutionary dynamics and species persistence. However, fitness and persistence consequences of habitat selection are seldom addressed in demographic studies.2. We used long-term capture-recapture data of Mediterranean Storm Petrels to investigate how habitat-selection decisions are made at different spatial (i.e. among and within breeding zones) and temporal scales (i.e. natal and breeding fidelity) in a colony characterized by significant variation in habitat quality due to contrasting parasite infestation levels. Specifically, we evaluate whether birds hatched in and/or breeding at different zones experience different (1) fitness components (i.e., breeding success and survival) and (2) fidelity (i.e. natal and breeding fidelity). In addition, we (3) explore the causes, environmental cues and consequences of nest fidelity vs dispersal. Finally, we project (4) how these differences influence population dynamics and persistence (i.e. population growth rate).3. Our findings reveal that habitat selection decisions have synergistic fitness consequences on multiple temporal and spatial scales considered. Specifically, breeders in the lower quality habitat zone (i.e. high tick infestation) exhibited reduced breeding success, local survival and nest fidelity but remained within their zone. Breeding success of individuals exhibiting nest dispersal marginally increased. Moreover, natal fidelity was lowest at the zone where fitness was highest. Overall, population growth rate at the colony suggests an annual population decline between 6 and 10%. Individuals seem to base their dispersal decision, but not their habitat selection choices on public information. As a result, birds do not experience increased fitness, indicating the potential presence of an evolutionary trap.4. Understanding the interplay between synergistic and opposing habitat choices is central to understanding species eco-evolutionary dynamics. Further, our results highlight exciting avenues for future research, when aiming to understand the complex and fundamental roles played by heterogeneity in habitat quality in species demography and eco-evolutionary dynamics, with significant implications for species management and conservation strategies. Biodiversa+ European Biodiversity Partnership (BiodivMon 2022 2023 Joint Call), co-funded by the European Commission (GA 101052342) and Fundación Biodiversidad (Project SEAGHOSTS). Government of the Balearic Islands, Vicen Mut Postdoctoral Fellowship (PD0042022). Conselleria de Medi Ambient i Territori, Govern de les Illes Balears. IMeDEA (CSIC-UIB), María de Maeztu Excellence Unit (CEX2021-001198, MCIN/AEI).With funding from the Spanish government through the "Maria de Maeztu Centre of Excellence" accreditation (CEX2021-001198).File List: Tick infestation & chick survival: - 1.Chicks_ticks_Espartar_2018_2020_.rds - 2.Chick_fate_by_MaxNtick_Zone_.rds - 6.1.Nticks_by_zone_pred.rds - 6.2.Chick_fate_by_zone_pred.rds Reproduction & breeding success: - 3.1.BS_experience_2015_2022_.Rds - 6.3.BS_by_zone_pred.rds Nest fidelity & nest dispersal: - 4.Nest_change_storm_petrel_Espartar_2014_2022_.rds - 5.Causes_nest_change.rds - 5.Information_nest_change.rds - 7.Consequences_nest_change.rds - 6.4.Nest_fid_by_zone_pred.rds Demographic projections & population dynamics: - CensusData.rds - param.rds - param_scenario.rds - 6.5.Fig_vital_rates.rds - 6.6.Fig_Observed_lambda.rdsPeer reviewe
Individual capture histories of breeding Cory's shearwaters at Pantaleu islet, with information on wintering areas
No full text[Description of methods used for collection/generation of data] Individual capture histories were built from long-term individual capture-recapture monitoring of adult Scopoli’s shearwater Calonectris diomedea breeding in Pantaleu islet. Some of these individuals were also equipped with geolocators, that when recovered, may provide information of wintering movements and individual wintering areas. All the information about the deployment of geolocators devices and wintering areas visited are encoded in the individual capture histories. The file includes 23 annual encounter occasions, which translate into 45 coded encounter occasions, with the ‘inter’ encounter occasions encoding information about presence in the colony and migratory decisions, and the ‘intra’ occasions encoding information about whether a geolocator had been deployed or not at the end of the season.Long-term individual capture-recapture monitoring of adult Scopoli’s shearwater Calonectris diomedea breeding in Pantaleu islet has been carried out by: M Genovart, JM Igual, A Sanz-Aguilar, G Tavecchia, A Rotger & D Oro. Information from geolocators on wintering movement and wintering areas were analysed by R Ramos, T Militão, D Vicente-Sastre, B Garcia-Urdangarin & J González-Solís.Este fichero contiene información de las historias de captura individuales de Pardela cenicienta criando en el islote de Pantaleu, Mallorca, durante el período 2000-2022. En estas historias de captura anuales se ha incluido información de la colocación de dispositivos geolocalizadores en algunos de estos individuos, y la información que se obtuvo de las zonas de invernada visitadas por estos individuos.Peer reviewe
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Lifespan, senescence and island syndrome of an endemic lizard: accounting for imperfect detection and continuous growth
No full textCode to perform the analysi
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