Temat: hatching success - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Offspring survival is negatively related to maternal response to sheep red blood cells in zebra finches
Autorzy:: Martyka, Rafał
Arct, Aneta
Cichoń, Mariusz
Rutkowska, Joanna
Opis:: The immune system is an important player in individual trade-offs, but what has rarely been explored is how different strategies of investment in immune response may affect reproductive decisions. We examined the relationship between the strength of maternal immune response and offspring viability and immune response in captive zebra finches Taeniopygia guttata. In three independent experiments, the females and subsequently their adult offspring were challenged with sheep red blood cells, and their responses were measured. There was no relationship between offspring immune response and that of their mothers. However, we found offspring survival until adulthood to be negatively related to maternal antibody titers. That effect was consistent among all experiments and apparent despite the fact that we partially cross-fostered newly hatched nestlings between nests of different females. This suggests that the observed effects of maternal immune response is not mediated by potentially altered female rearing abilities. To our knowledge, this is the first study showing the relationship between the strength of the immune response and between-generational fitness costs in birds.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 2.

Tytuł:: The effects of substrate temperature on the reproductive success of Caretta caretta on a volcanic beach in the Mediterranean Sea
Autorzy:: Vecchioni, Luca
Citarrella, Andrea
Cambera, Irene
Di Gangi, Antonella
D’Emanuele, Dario
Ventura, Lucia
Principato, Elena
Visconti, Giulia
Torri, Marco
Faraone, Francesco P.
Arculeo, Marco
Tematy:: conservation strategy
hatching success
loggerhead sea turtle
shade cloth cover
Sicily; Pokaż więcej
Wydawca:: Instytut Technologiczno-Przyrodniczy
Powiązania:: https://bibliotekanauki.pl/articles/58906939.pdf Link otwiera się w nowym oknie
Opis:: A five-year of monitoring (2018-2022) of the loggerhead sea turtle Caretta caretta nests in “Pozzolana di Ponente” beach on Linosa Island (Pelagie Archipelago, Italy) is here reported. To explore how temperatures affect the hatching success and the possible occurrence of any malformation in hatchlings, incubation temperature values were recorded using data loggers positioned at depths of 5 and 35 cm (for each nest) from the surface, approximately 0.5 m from the nest chamber. The obtained results highlighted important issues related to the success of hatching and the incidence of body anomalies. The temperatures recorded at different depths near the nests (5 and 35 cm) in some periods of incubation of the eggs were above optimal development temperature (i.e., ~33°C), causing high mortality rates, especially during the first two years of the survey (2018-2019). In the next three years (2020-2022), the implementation of shading cover cloths of the nests increased the survival rate and decreased the incidence of malformed individuals. Furthermore, atmospheric temperature data were extrapolated from the “Copernicus Climate Change” web service and included in our analyses to assess any changes over the timeframe analysed. Over five years (2018-2022), the average atmospheric temperature increased slightly by 1.7°C. In light of global warming, the implementation of effective and low-cost mitigation activities, such as the use of shade cloth covers to protect the nests from overheating, should be considered a suitable conservation action.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The impact of Wolbachia : male age and mating history on cytoplasmic incompatibility and sperm transfer in Drosophila simulans
Autorzy:: Champion de Crespigny, F.
Awrahman, Zmnako
Wedell, N.
Opis:: Most insects harbour a variety of maternally inherited endosymbionts, the most widespread being Wolbachia pipientis that commonly induce cytoplasmic incompatibility (CI) and reduced hatching success in crosses between infected males and uninfected females. High temperature and increasing male age are known to reduce the level of CI in a variety of insects. In Drosophila simulans, infected males have been shown to mate at a higher rate than uninfected males. By examining the impact of mating rate independent of age, this study investigates whether a high mating rate confers an advantage to infected males through restoring their compatibility with uninfected females over and above the effect of age. The impact of Wolbachia infection, male mating rate and age on the number of sperm transferred to females during copulation and how it relates to CI expression was also assessed. As predicted, we found that reproductive compatibility was restored faster in males that mate at higher rate than that of low mating and virgin males, and that the effect of mating history was over and above the effect of male age. Nonvirgin infected males transferred fewer sperm than uninfected males during copulation, and mating at a high rate resulted in the transfer of fewer sperm per mating irrespective of infection status. These results indicate that the advantage to infected males of mating at a high rate is through restoration of reproductive compatibility with uninfected females, whereas uninfected males appear to trade off the number of sperm transferred per mating with female encounter rate and success in sperm competition. This study highlights the importance Wolbachia may play in sexual selection by affecting male reproductive strategies.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 4.

Tytuł:: Acta Ornithologica, vol. 33, no. 3-4
Zmienność rozmiarów jaj dymówki
Egg size variation in the barn swallow Hirundo rustica
Autorzy:: Bańbura, Jerzy
Zieliński, Piotr
Współwytwórcy:: Polska Akademia Nauk. Muzeum i Instytut Zoologii
Wydawca:: Muzeum i Instytut Zoologii PAN
Powiązania:: Acta Ornithologica
Opis:: Bibliogr. p. 194-195
S. [191]-196 ; 27 cm
Bibliogr. s. 194-195
P. [191]-196 ; 27 cm
Abstract in Polish
Streszcz. pol.
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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Skocz do pozycji: 5.

Tytuł:: Black-headed gull and heavy metals
Heavy metals, resting metabolism rates and breeding parameters in two populations of black-headed gull Larus ridibundus from the industrially polluted areas of Upper Silesia, Poland
Acta Ornithologica, vol. 35, no. 2
Skażenie metalami ciężkimi, metabolizm tlenowy i parametry lęgowe dwóch populacji lęgowych mewy śmieszki na obszarach zanieczyszczonych przez przemysł (Górny Śląsk)
Autorzy:: Migula, Paweł
Szymczyk, Artur
Kowalczyk, Katarzyna
Augustyniak, Maria
Współwytwórcy:: Polska Akademia Nauk. Muzeum i Instytut Zoologii
Wydawca:: Muzeum i Instytut Zoologii PAN
Powiązania:: Acta Ornithologica
Opis:: Streszcz. pol. Nazwy taksonów także w jęz. łac.
Abstract in Polish. Taxa in Latin
Black-headed Gulls breeding in the central part of the Upper Silesian Industrial Region (Katowice-Szopienice) in Southern Poland were compared with the colony from the less polluted area (Świerklaniec) situated in a distance of 23 km. Heavy metals: Cd, Pb, Zn and Cu were determined in various organs of nestlings, fledglings and mature birds as well as egg yolks. Resting metabolism rates, hatching success and eggshell thickness were used as biomarkers of environmental exposure to industrial pollutants. The clutch size (2.97 versus 3.61) and hatching success (81.5% versus 87%) were lower in the colony from the more polluted site. Relatively high metal contents in yolks indicate only a partial protection of the offspring from toxic compounds. Gulls were able to regulate body contents of essential metals Zn and Cu, but Pb and Cd accumulated rapidly in the liver, kidneys, and lungs of developing birds. Cd also accumulated in the ovaries at the similar levels as in the kidneys. Cd and Pb may have affected earlier stages of development when parents were foraged in a close vicinity of heavily polluted area and once the young gulls had reached a maturity they then foraged in distant areas. During this period they were exposed to pollutants in a similar way as the gulls from a less polluted site. There was no growth impairment identified in gulls from the more polluted area, and their resting metabolism (RMR) calculated per unit of body weight was lower, indicating that energetic costs for detoxification were not as high.
P. [159]-172 : ill. ; 27 cm
Bibliogr. s. 169-171
S. [159]-172 : il. ; 27 cm
Bibliogr. p. 169-171
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

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