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Article
Piotr Minias, Auteur ; Jesus Gomez, Auteur ; Tomasz Janiszewski, AuteurBirds have evolved an astonishing diversity of egg pigmentation and this variation is driven by a complex interplay of proximate and ultimate factors. In ecological research, egg pigmentation is often measured at randomly selected points or regi[...]
Article
Radosław Włodarczyk, Auteur ; Patrycja Podlaszczuk, Auteur ; Krzysztof Kaczmarek, Auteur ; Tomasz Janiszewski, Auteur ; Piotr Minias, AuteurThe relative ratio of the two main leukocyte types, heterophils (H) and lymphocytes (L), is known to change proportionally to the concentrations of stress hormones in the circulating blood. Thus, analysis of leukocyte profiles serves as a reliab[...]
Article
Kamila Gach, Auteur ; Tomasz Janiszewski, Auteur ; Radoslaw Wlodarczyk, Auteur ; Bartosz Lesner, Auteur ; Piotr Minias, AuteurThe aim of this study was to evaluate which factors determined immediate mortality of Common Tern (Sterna hirundo) chicks during a heavy rainfall. On 26 June 2013, a heavy rainfall event was recorded at an inland colony of Common Terns in centra[...]
Article
Piotr Minias, Auteur ; Adrian Surmacki, Auteur ; Karolina Kudelska, Auteur ; Patrycja Podlaszczuk, Auteur ; Maciej Kamiński, Auteur ; Krzysztof Kaczmarek, Auteur ; Radosław Włodarczyk, Auteur ; Tomasz Janiszewski, AuteurDans Ibis (160(1) 2018)There is increasing evidence that melanin-based plumage coloration correlates with different components of fitness and that it may act as a social or sexual signal of individual quality. We analysed variation in melanin pigmentation in the outer[...]
Article
Tomasz Janiszewski, Auteur ; Piotr Minias, Auteur ; Bartosz Lesner, Auteur ; Krzysztof Kaczmarek, AuteurBreeding performance of many vertebrate species is known to improve over the early stages of the life cycle, which has been commonly attributed to the progressive improvement in competences and increasing investment in reproduction. While there [...]
Article
Piotr Minias, Auteur ; Włodzimierz Meissner, Auteur ; Radosław Włodarczyk, Auteur ; Agnieszka Ożarowska, Auteur ; Anna Piasecka, Auteur ; Krzysztof Kaczmarek, Auteur ; Tomasz Janiszewski, AuteurMigration is an energetically expensive and hazardous stage of the annual cycle of non-resident avian species, and requires certain morphological adaptations. Wing shape is one of the morphological traits that is expected to be evolutionarily sh[...]
Article
Piotr Minias, Auteur ; Wlodzimierz Meissner, Auteur ; Radoslaw Wlodarczyk, Auteur ; Agnieszka Ożarowska, Auteur ; Anna Piasecka, Auteur ; Krzysztof Kaczmarek, Auteur ; Tomasz Janiszewski, AuteurMigration is an energetically expensive and hazardous stage of the annual cycle of non-resident avian species, and requires certain morphological adaptations. Wing shape is one of the morphological traits that is expected to be evolutionarily sh[...]
Article
Tomasz Janiszewski, Auteur ; Piotr Minias, Auteur ; Zbigniew Wojciechowski, AuteurThe process of transition from nesting on trees to electricity poles has been observed over the last decades in many European populations of the White Stork Ciconia ciconia, but the direct mechanisms behind this process have not been explicitly [...]
Article
Marcin Podlaszczuk, Auteur ; Zbigniew Wojciechowski, Auteur ; Patrycja Podlaszczuk, Auteur ; Piotr Minias, Auteur ; Tomasz Janiszewski, Auteur ; Agnieszka Wojciechowska, AuteurSeveral different selective pressures have been suggested to explain an intense competition for early return to breeding grounds in birds. In this study we hypothesized that shortening day length during summer months may constitute additional se[...]
Article
Tomasz Janiszewski, Auteur ; Piotr Minias, Auteur ; Zbigniew Wojciechowski, AuteurCapsuleThe phenology of arrival at the breeding grounds and reproductive output of White Storks were studied in central Poland between 2000 and 2011. Although, in general, there was a strong negative relationship between the number of fledglings[...]
Article
Piotr Minias, Auteur ; Bartosz Lesner, Auteur ; Tomasz Janiszewski, AuteurCapsule Body mass of Whiskered Tern chicks from the central parts of subcolonies grew at a higher rate in comparison to chicks hatched in the peripheral zones. Growth rates of both body mass and head length correlated positively with nest densit[...]
Article
RADOS\LAW W\LODARCZYK, Auteur ; Krzysztof Kaczmarek, Auteur ; Piotr Minias, Auteur ; Tomasz Janiszewski, Auteur
Article
Radoslaw Wlodarczyk, Auteur ; Plotr Minias, Auteur ; Krzysztof Kaumarek, Auteur ; Tomasz Janiszewski, Auteur ; Anna Kleszcz, AuteurWaders generally follow two alternative strategies. The "B-strategy" or "energy minimization" strategy is to initiate migration late in the season, start moulting at the breeding grounds and migrate slowly in small steps, whereas the "S-strategy[...]
Article
Piotr Minias, Auteur ; Krzysztof Kaczmarek, Auteur ; Radoslaw Wlodarczyk, Auteur ; Tomasz Janiszewski, Auteur ; Rafal Bargiel, Auteur
Article
Tomasz Janiszewski, Auteur ; Piotr Minias, Auteur ; Zbigniew Wojciechowski, Auteur ; Patrycja Podlaszczuk, Auteur
Article
Katarzyna Wojczulanis-Jakubas, Auteur ; Piotr Minias, Auteur ; Krzysztof Kaczmarek, Auteur ; Tomasz Janiszewski, AuteurWe examined the brood sex ratio and offspring body mass in relation to the timing of breeding and brood size in the Great Cormorant Phalacrocorax carbo sinensis. The brood sex ratio was not related to brood size but it was significantly related [...]
Article
Piotr Minias, Auteur ; Krzysztof Kaczmarek, Auteur ; Radoslaw Wlodarczyk, Auteur ; Tomasz Janiszewski, AuteurAdaptative significance of melanin-based coloration in birds remains poorly recognized. It has been suggested that genes responsible for melanin synthesis may have pleiotropic effect on several physiological and behavioural functions, including [...]
Article
Piotr Minias, Auteur ; Radoslaw Wlodarczyk, Auteur ; Wlodzimierz Meissner, Auteur ; Magdalena Remisiewicz, Auteur ; Krzysztof Kaczmarek, Auteur ; Andrzej Czapulak, Auteur ; Przemyslaw Chylarecki, Auteur ; Adam Wojciechowski, Auteur ; Tomasz Janiszewski, AuteurThe Common Snipe Gallinago gallinago migrates in large numbers through central Europe towards its wintering grounds in western Europe. Over the past 20 years more than 12 000 Common Snipes were ringed at seven ringing stations in Poland during t[...]
Article
Piotr Minias, Auteur ; Krzysztof Kaczmarek, Auteur ; Tomasz Janiszewski, Auteur ; Zbigniew Wojciechowski, Auteur
