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Etienne Danchin - One of the best experts on this subject based on the ideXlab platform.
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Behavioral and physiological responses to male handicap in chick-rearing black-legged kittiwakes
Behavioral Ecology, 2011Co-Authors: Sarah Leclaire, Fabrice Helfenstein, Vincent Bourret, Richard H. Wagner, Scott A. Hatch, Olivier Chastel, Etienne DanchinAbstract:Parental investment entails a trade-off between the benefits of effort in current offspring and the costs to future reproduction. Long-lived species are predicted to be reluctant to increase parental effort to avoid affecting their survival. We tested this hypothesis in black-legged kittiwakes Rissa tridactyla by clipping flight feathers of experimental males at the beginning of the chick-rearing period. We analyzed the consequences of this handicap on feeding and attendance behavior, body condition, integument coloration, and circulating levels of corticosterone and prolactin in handicapped males and their mates in comparison to unmanipulated controls. Chicks in both groups were compared in terms of aggressive behavior, growth, and mortality. Handicapped males lost more mass, had less bright integuments, and attended the nest less often than controls. Nevertheless, they fed their chicks at the same rate and had similar corticosterone and prolactin levels. Compared with control females, females mated with handicapped males showed a lower provisioning rate and higher nest attendance in the first days after manipulation. Their lower feeding rate probably triggered the increased sibling aggression and mortality observed in experimental broods. Our findings suggest that experimental females adaptively adjusted their effort to their mate's perceived quality or that their provisioning was constrained by their higher nest attendance. Overall, our results suggest that kittiwake males can decrease their condition for the sake of their chicks, which seems to contradict the hypothesis that kittiwakes should be reluctant to increase parental effort to avoid affecting their survival. Key words: body condition, cost of reproduction, feather clipping, parental effort, Rissa tridactyla.
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Polymorphic microsatellites in the black-legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla (Laridae). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae). Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species.
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Polymorphic microsatellites in the black‐legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla ( Laridae ). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae) . Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species .
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Measuring aggregation of parasites at different host population levels
Parasitology, 1996Co-Authors: Thierry Boulinier, A. R. Ives, Etienne DanchinAbstract:Parasites are generally found aggregated among hosts. In this paper we propose a method for measuring aggregation at different scales in the host population. We use the method to characterize the pattern of aggregation of the tick Ixodes uriae on chicks of its seabird host, the Kittiwake Rissa tridactyla . We found evidence of aggregation at the among-nest scale, but not among chicks within nests. This shows that the processes leading to aggregation occur at a higher scale than the nest. The methods we develop provide a way to compare parasite aggregation at different scales in a quantitative fashion and can be applied in a large number of epidemiological studies.
Fabrice Helfenstein - One of the best experts on this subject based on the ideXlab platform.
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Behavioral and physiological responses to male handicap in chick-rearing black-legged kittiwakes
Behavioral Ecology, 2011Co-Authors: Sarah Leclaire, Fabrice Helfenstein, Vincent Bourret, Richard H. Wagner, Scott A. Hatch, Olivier Chastel, Etienne DanchinAbstract:Parental investment entails a trade-off between the benefits of effort in current offspring and the costs to future reproduction. Long-lived species are predicted to be reluctant to increase parental effort to avoid affecting their survival. We tested this hypothesis in black-legged kittiwakes Rissa tridactyla by clipping flight feathers of experimental males at the beginning of the chick-rearing period. We analyzed the consequences of this handicap on feeding and attendance behavior, body condition, integument coloration, and circulating levels of corticosterone and prolactin in handicapped males and their mates in comparison to unmanipulated controls. Chicks in both groups were compared in terms of aggressive behavior, growth, and mortality. Handicapped males lost more mass, had less bright integuments, and attended the nest less often than controls. Nevertheless, they fed their chicks at the same rate and had similar corticosterone and prolactin levels. Compared with control females, females mated with handicapped males showed a lower provisioning rate and higher nest attendance in the first days after manipulation. Their lower feeding rate probably triggered the increased sibling aggression and mortality observed in experimental broods. Our findings suggest that experimental females adaptively adjusted their effort to their mate's perceived quality or that their provisioning was constrained by their higher nest attendance. Overall, our results suggest that kittiwake males can decrease their condition for the sake of their chicks, which seems to contradict the hypothesis that kittiwakes should be reluctant to increase parental effort to avoid affecting their survival. Key words: body condition, cost of reproduction, feather clipping, parental effort, Rissa tridactyla.
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Polymorphic microsatellites in the black‐legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla ( Laridae ). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae) . Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species .
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Polymorphic microsatellites in the black-legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla (Laridae). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae). Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species.
Claire Tirard - One of the best experts on this subject based on the ideXlab platform.
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Polymorphic microsatellites in the black‐legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla ( Laridae ). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae) . Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species .
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Polymorphic microsatellites in the black-legged kittiwake Rissa tridactyla
Molecular Ecology Notes, 2002Co-Authors: Claire Tirard, Fabrice Helfenstein, Etienne DanchinAbstract:We isolated seven microsatellite sequences from a library of recombinant clones in Rissa tridactyla (Laridae). We investigated their polymorphism in one population from France. Preliminary results indicate that these markers should prove valuable tools for the study of mating systems, population genetic structure and dispersal abilities in this seabird species. We present the results of cross-species amplification for two seabird species: Uria aalge (Alcidae) and Stercorarius parasiticus (Stercorariidae). Some of the microsatellites isolated in R. tridactyla might be useful for studies on other seabird species.
Dita Rachmawati - One of the best experts on this subject based on the ideXlab platform.
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Analisis Kriteria Personal Branding Selebgram Non Selebriti (Studi Deskriptif Kualitatif Akun Instagram @lippielust)
Universitas Telkom, 2018Co-Authors: Dita RachmawatiAbstract:Media sosial saat ini telah menjadi sarana dalam melakukan pemasaran maupun promosi baik barang, jasa, maupun personal khususnya salah satunya adalah Instagram. Untuk menjadi seorang selebgram dibutuhkan Personal Branding yang kuat, memiliki kekhasan, perbedaan dari selebgram lainnnya agar mempunyai eksistensi yang bertahan lama dalam menjadi seorang selebgram pada media sosial Instagram. Rissa merupakan seorang selebgram yang bukan dari kalangan selebriti, yang disebut selebgram non selebriti. Personal Branding yang dilakukan Rissa menjadikannya endorser dan berhasil bekerja sama secara project professional dengan banyak brand dalam negeri maupun luar negeri. Rissa menjadi selebgram dengan fokus yang sangat spesifik yaitu beauty yang lebih mengarah kepada lipstick. Penelitian ini menganalisis tentang bagaimana kriteria Personal Branding selebgram non selebriti. Sedangkan untuk metode yang digunakan ialah deskriptif kualitatif dengan indikator 11 kriteria Authentic Personal Branding menurut Rampersad. Dalam penelitian ini menghasilkan bahwa Personal Branding yang dilakukan Rissa memiliki kepribadian yang memiliki karakter, nilai-nilai, visi yang sesuai dengan ambisi pribadi, kode moral dan perilaku, konsisten, berfokus pada satu bidang, diakui dan berpengalaman, unik, terhubung dengan khalayak, memiliki hubungan yang baik dengan partner pekerjaan dan selalu melakukan perbaikan diri dalam akun Instagram @lippielust
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Analisis Kriteria Personal Branding Selebgram Non Selebriti (Studi Deskriptif Kualitatif Akun Instagram @lippielust)
Jurnal Komunikasi, 2018Co-Authors: Dita RachmawatiAbstract:ABSTRACT Social media nowadays has become tool of marketing and promotion of goods, services, and personal like Instagram. Being a celebgram should have a strong Personal Branding, has uniqueness, the difference from other celebgram in order to have a long existence to be celebgram on social media Instagram. Rissa is a non-celebrity celebgram. Rissa’s known as an endorser for beauty project this leap how to work together on a project professional with many brands in the country and abroad. Rissa became a celebgram with a very specific focus that is more beauty that leads to lipstick. This study analyze about how Personal Branding criteria non celebrity celebgram. The method used is descriptive qualitative with indicator 11 Authentic Personal Branding criterion according to Rampersad. In this study, Rissa’s Personal Branding has a personality as which is character, values, vision that suits personal ambition, moral code and behavior, consistent, focused on one field, acknowledged and experienced, unique, connected to the audience, owns good relationship with partner work and always make self improvement in Instagram account @ lippielust. Keywords - Personal Branding, Social Media, Instagram, Celebgram, Rissa Stellar
U. C. Mohanty - One of the best experts on this subject based on the ideXlab platform.
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Excess and deficient summer monsoon rainfall over ORissa in relation to low pressure systems
2009Co-Authors: M. Mohapatra, U. C. MohantyAbstract:A study has been undertaken to find out different characteristics like frequency, intensity, movement, region of occurrence etc. of low pressure systems (LPS) including low, depression and cyclonic storm etc. developing over ORissa and neighbouring sea and land regions during excess and deficient monsoon rainfall months (June – September) over ORissa. The study is based on data of 20 years (1980-1999). The principal objective of this study is to find out the contribution of LPS to extreme monsoon rainfall activity over ORissa. The number of LPS days rather than frequency of formation of LPS over different regions better explain the excess and deficient rainfall over ORissa. The excess rainfall over ORissa during June is not significantly related with the number of LPS days. Significantly less than normal number of LPS days over northwest (NW) Bay of Bengal and Gangetic West Bengal (GWB) and higher number of LPS days over west central (WC) Bay off north coastal Andhra Pradesh (NCAP) cause deficient rainfall over ORissa during June. While significantly higher than normal number of LPS days over NW Bay and ORissa leads to excess rainfall during July, less than normal number of LPS days over WC Bay off NCAP is associated with excess rainfall during August. The less number of LPS days over ORissa due to less frequent movement of LPS across ORissa from the Bay of Bengal leads to deficient rainfall over ORissa during both July and August. Significantly higher/less than normal number of LPS days over NW Bay leads to excess/deficient rainfall over ORissa during September.
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Periodicity in intraseasonal variation of summer monsoon rainfall over ORissa, India in relation to synoptic disturbances
Meteorology and Atmospheric Physics, 2008Co-Authors: M. Mohapatra, U. C. MohantyAbstract:The summer monsoon rainfall over ORissa, a state of eastern India, shows characteristic intraseasonal and interannual variability, due to interaction of basic westerly flow with orography and the synoptic scale monsoon disturbances including low-pressure systems and cyclonic circulations extending upto mid-tropospheric level (LPSC). These systems normally develop over the north Bay of Bengal and move west-northwestwards along the monsoon trough. The essence of this study is to find out the main features of the intraseasonal variability of daily monsoon rainfall over ORissa in relation to synoptic systems like LPSC and its implication on the interannual variation of rainfall. For this purpose, the actual and mean daily rainfall data of 31 uniformly distributed stations, six homogeneous regions and ORissa as a whole during monsoon season (June–September) over a period of 20 years (1980–1999) are subjected to auto-correlation and power spectrum analyses. The actual and average daily scores of significant EOFs and actual daily occurrence along with daily probability of occurrence of the LPSC influencing rainfall over ORissa during the same period are also subjected to auto-correlation and power spectrum analyses. The intraseasonal variation of monsoon rainfall over ORissa and different homogeneous regions is dominated by the synoptic mode (3–9 days) of variation due to the similar mode of variation in the occurrence of LPSC influencing the rainfall. The seasonal rainfall and hence the interannual variation depends on the intraseasonal variation of rainfall modulated with the synoptic mode of variation in the occurrence of the LPSC. The occurrence of LPSC over the northwest (NW) Bay/NW and adjoining northeast (NE) Bay and its subsequent movement and persistence over ORissa and east Madhya Pradesh & Chhattisgarh in synoptic mode (3–6 days) alongwith absence of similar mode in the occurrence of the LPSC over NE Bay, Gangetic West Bengal (GWB) in the north and west central (WC) Bay to the south leads to excess rainfall over different homogeneous regions and ORissa as a whole. The reverse is the case in deficient years over ORissa and all homogeneous regions except southwest ORissa. The occurrence of the LPSC over GWB in synoptic mode (about 5 days) alongwith absence of synoptic mode in the occurrence of the LPSC over NW Bay leads to deficient rainfall year over southwest ORissa.
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Spatio-temporal variability of summer monsoon rainfall over ORissa in relation to low pressure systems
Journal of Earth System Science, 2006Co-Authors: M. Mohapatra, U. C. MohantyAbstract:The summer monsoon rainfall over ORissa occurs mostly due to low pressure systems (LPS) developing over the Bay of Bengal and moving along the monsoon trough. A study is hence undertaken to find out characteristic features of the relationship between LPS over different regions and rain-fall over ORissa during the summer monsoon season (June-September). For this purpose, rainfall and rainy days over 31 selected stations in ORissa and LPS days over ORissa and adjoining land and sea regions during different monsoon months and the season as a whole over a period of 20 years (1980-1999) are analysed. The principal objective of this study is to find out the role of LPS on spatial and temporal variability of summer monsoon rainfall over ORissa.
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Some characteristics of low pressure systems and summer monsoon rainfall over ORissa
Current Science, 2004Co-Authors: M. Mohapatra, U. C. MohantyAbstract:The present study was undertaken to find out charac-teristic features like frequency, intensity, movement, region of formation, days of occurrence, etc. of syno p tic disturbances such as low, depression, cyclonic storm, etc. forming over ORissa and neighbouring sea and land regions during summer monsoon season (June–September). The study is based on the data of 20 years (1980 –1999). The principal objective of this study was to understand the contribution of the low pressure sy stems (LPS) including low, depression and cyclonic storm to interannual variability of summer monsoon rainfall over ORissa. Most of the LPS develop over northwest (NW) Bay of Bengal and move towards east Madhya Pradesh across Gangetic West Bangal (GWB) during June, July and across ORissa during August and Sep tember. The rainfall over ORissa is more related with the fre-quency o f LPS days over ORissa and adjoining land/sea regions than with the frequencies of LPS, cyclonic dis-turbances (CD) and CD days over those regions. The seasonal monsoon rainfall over ORissa is significantly higher with higher frequency of LPS days over NW B ay and ORissa. It is less with higher frequency of LPS days over Jharkhand followed by west central Bay off north coastal Andhra Pradesh and Bangl adesh. The frequencies of monsoon low days are higher over NW Bay and ORissa thus compensating the ad-verse impact of reduced CD and CD days on rainfall over ORissa in recent years. The monthly and seasonal monsoon rainfall over ORissa show no significant trends in recent years. It may be due to insignificant trends in those LPS days which are significantly cor-re lated with rainfall over ORissa. T
