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1

The analysis of breeding performance in five generations of Polish Landrace line 23

100%
Panek A., Buczynski J. T., Lucinski P.
Annals of Animal Science. Supplement
|
2005
|
nr 1
2

A comparison of breeding performance results of Polish Large White and Polish Landrace sows in the Lubuskie Province

86%
Buczynski J. T., Cwiek I., Panek A., Lucinski P., Szulc K.
Annals of Animal Science. Supplement
|
2003
|
nr 1
3

The effect of imported boars on breeding performance results in the Polish Landrace breed

86%
Buczynski J. T., Panek A., Szulc K.
Annals of Animal Science. Supplement
|
2001
|
nr 1
4

Level of macroelements in blood serum and breeding performance of LWP x PL sows on industrial farms

72%
Gajewczyk P., Akincza J.
Annals of Animal Science
|
2007
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tom 07
|
nr 1
5

The effect of mutation within RYR1 gene on breeding performance in sows of Polish Landrace line 23

72%
Panek A., Buczynski J. T., Lucinski P.
Annals of Animal Science. Supplement
|
2005
|
nr 1
6

Influence of habitat and nest-site quality on the breeding performance of Lanner Falcons Falco biarmicus

72%
Amato M., Ossino A., Brogna A., Cipriano M., D'Angelo R., Dipasquale G., Mannino V., Andreotti A., Leonardi G.
Acta Ornithologica
|
2014
|
tom 49
|
nr 1
Site quality may influence breeding performance especially in raptors showing strong territory fidelity as predicted by the site-dependent population regulation hypothesis. Thus, the occupancy of nest-sites is non-random, indicating a preference of certain territories, apparently of higher quality. During four breeding seasons (2003-2006), we recorded the occupancy rate and the number of young fledged from Lanner Falcon Falco biarmicus feldeggii nest-sites in eastern Sicily, Italy. Breeding sites with different occupancy rates showed significant differences in environmental attributes, mainly altitude. A generalised linear model revealed a significant effect of the slope of the nest-site on mean fledgling number per successful pair. In addition, the mean slope of the nest territory and the slope of the nest-site are the main predictors for differentiating the cliff selection by Lanners and by much more competitive Peregrine Falcons Falco peregrinus. Finally, our results suggest a crucial role of the high quality sites for the population viability. Occupancy rates were positively related to the mean number of young fledged per territorial pair and during the four years of the study period six high quality nest-sites raised 58% of young produced in the whole study area. We suggest that the annual production of young of the high quality territories should be preserved and that evaluation of the effective contribution of the low quality sites for the persistence of a viable population in Sicily should be performed.
7

Spatial distribution and breeding performance of Golden Eagles Aquila chrysaetos in Sicily: implications for conservation

72%
Di Vittorio M., Lopez-Lopez P.
Acta Ornithologica
|
2014
|
tom 49
|
nr 1
Understanding ecological requirements of animals is essential to improve habitat management and conservation strategies for endangered species. However, as most studies on Golden Eagle's habitat preferences and breeding ecology have been conducted in northern latitudes (e.g. USA, Scotland, Scandinavia and the European Alpine region), our knowledge of the species ecology in the Mediterranean basin is more limited. Currently, only 16 pairs still remain in Sicily (southern Italy) and in spite of this delicate status of conservation, there were no previous attempts to analyse ecological requirements of the species in the island. Therefore, we monitored Golden Eagles from 1990 to 2012, analyzed habitat characteristics of breeding territories and quantified habitat relationships with breeding performance. We used a case-control design through Generalized Linear Models to examine ecological descriptors at two different spatial scales: (i) "territory" defined as a plot of 4 km radius centered in the nesting area; and (ii) "landscape" by means of the 10 × 10 km Universal Transversal Mercator (UTM) cells where the species was present or absent. At the territory scale, the presence of Golden Eagle was positively related to the ruggedness of the terrain and to the extension of arable land, and negatively to the extension of forests. At the landscape scale the presence of the species was positively correlated with the range of slope and negatively to the aridity of the surrounding landscape and the extension of forest areas. The Golden Eagle has experienced a strong decline in breeding performance during the last two decades in Sicily, which negatively impacted population dynamics. The best model at the territory scale included the surface of sparsely vegetated areas (i.e. a surrogate of prey availability) as the best predictor of breeding output (i.e. number of young fledged). At the landscape scale, the best predictor of breeding output was the average annual temperature (positive effect) and surface of artificial lands (negative effect). Significant differences in environmental characteristics were found between occupied and unoccupied sampling units and between territories of high and low breeding performance. Our results highlight the importance of maintaining the structure of landscape arising from traditional forms of extensive agriculture in the Mediterranean basin, thereby favouring prey availability, and the importance of limiting human activities and changes in land use in rugged mountainous areas.
8

The comparison of boars on the basis of their breeding performance

72%
Buczynski J. T., Panek A., Szulc K., Cwiek I., Lucinski P., Skotarczak W.
Roczniki Naukowe Zootechniki. Suplement
|
2000
|
tom 10
9

A comparison of breeding performance of Polish Landrace sows in purebred and two-breed mating

72%
Buczynski J. T., Panek A.., Fajfer E.
Annals of Animal Science. Supplement
|
2001
|
nr 1
10

Effects of the breed of boar, fertilization method and sequence of litters on breeding performance parameters of crossbred sows [PLW x PL]

72%
Buczynski J. T., Panek A., Lucinski P.
Annals of Animal Science. Supplement
|
2001
|
nr 1
11

The breeding performance of the Common Buzzard Buteo buteo and Goshawk Accipiter gentilis in Central Poland

72%
Goszczynski J.
Acta Ornithologica
|
2001
|
tom 36
|
nr 2
Both the Buzzard and the Goshawk nested mainly in pines. The mean clutch size in the former was 2.8, in the latter 3.6 eggs per breeding pair. There were statistically significant differences in clutch sizes in the Buzzard in particular breeding seasons. The mean number of hatchlings was 2.3 in the Buzzard and 2.6 in the Goshawk. Brood losses were similar in both raptors —19% in the Goshawk and 24% in the Buzzard. The breeding success (the ratio of the number of fledglings to the clutch size) in the Buzzard was highest in clutches of 3 and 4 eggsy whereas in the Goshawk a similar level of success was achieved with smaller clutches (2 or 3 eggs). Only in the case of the Buzzard there were significant differences in clutch sizes and numbers of fledglings in the various years. In this species the mean number of fledglings was positively correlated with the rodent availability index in a given year. There was no such relationship between the abundance of prey items found in Goshawk nests and the number of fledglings. The correlation between the number of newly-fledged Buzzards and Goshawks in a given year could have been due to diet overlap between the two species.
12

Observation on larval deformity during induced spawning of walking catfish, Clarias batrachus (Actinopterygii: Siluriformes: Clariidae), at different combinations of human chorionic gonadotropin dose and latency period

58%
Sahoo S. K., Giri S. S., Chandra S., Sahu A. K.
Acta Ichthyologica et Piscatoria
|
2009
|
tom 39
|
nr 1
Five combinations of human chorionic gonadotropin (hCG) dose and five latency periods were evaluated to observe the pattern of deformed larvae among the hatchlings in walking catfish, Clarias batrachus (L.). A higher percentage (7%–12%) of deformed larvae were observed at 1000, 2000, and 5000 IU · kg-1 with 14–23 h latency combinations. The results of the study indicated that 3000 IU · kg-1 with 14–23 h and 4000 IU · kg-1 with 14–17 h latency combinations were preferable to reduce the deformed larvae (4%–6%) among the hatchlings during induced spawning of the catfish.
13

Are changes in predatory species composition and breeding performance responsible for the decline of Coots Fulica atra in Milicz Ponds Reserve (SW Poland)?

58%
Rek P.
Acta Ornithologica
|
2009
|
tom 44
|
nr 1
Both native and non-native predators should strongly affect resident fauna. Nevertheless, because of a lack of defensive mechanisms in potential prey, the influence of non-native predators should have longer-lasting and more deleterious repercussions. The breeding ecology of the Coot was studied in the Milicz Ponds reserve and compared with data from 20 years earlier. In the meantime, non-native, mammalian predators (American Mink Mustela vison, Raccoon Dog Nyctereutes procyonoides and Raccoon Procyon lotor) turned up in this area, while the numbers of Hooded Crow Corvus cornix, the main predator of Coot nests, decreased. Compared with 1980-1982, the number of Coots in 2002-2003 dropped by more than half and mean clutch size decreased. Breeding success and the number of hatchlings per pair remained unchanged; in the 1980s, however, Coots renested more frequently, there was greater nesting synchrony and breeding seasons were demonstrably shorter. Moreover, although predation still remained the main cause of losses, its numbers were decreasing. Coots nesting on islands were the most successful, which was due to the weaker predation on the part of Crows. In contrast, the mammalian (non-native) predators did not appear to play a significant role in the breeding success in 2002-2003. Nevertheless, taking into account the breeding parameters of the Coot population and the nature of the relationship between mammalian/bird predators and Coots, it does seem that the low density of Coots in 2002-2003 was a reaction to the pressure of mammalian predators.
14

Effects of chicken feed herbal additives on the breeding performance, slaughter yield and mechanical and morphometric parameters of chicken tibia bones

58%
Kwiecien M., Winiarska-Mieczan A., Palyszka M., Kwiatkowska K.
Medycyna Weterynaryjna
|
2014
|
tom 70
|
nr 05
The analyses aimed at determining the effect of replacing the antibiotic in feed mixes with various herbal additives on the core chicken breeding parameters such as weight gain, FCR, mortality rate, EEI, selected carcass slaughter parameters and some strength and morphometric parameters of the tibia bone on broiler chickens. 400 one-day-old Ross 308 male chicks were split into 8 groups of 10 chicks each in 5 repetitions. The chicks were allocated at random to the control group (negative – without AGP), I – receiving AGP, and to groups given 2% herbal additives: hop – II, lime – III, lemon balm – IV, pansy – V, peppermint – VI and nettle – VII. The study involved herbs contained essential oils of: hop cones (0.42%), lemon balm leaves (0.077%), peppermint leaves (2.92%), as well as flavonoids: pansy herb (0.37%), and lime flower (0.78%). During the experiment chickens’ body weight was controlled on the 21st, 35th and 42nd days of breeding, set FCR, EEI and postslaughter evaluation were performed on 10 male chicks selected from each group. The right-leg tibia was sampled for analysis from chickens slaughtered on day 42. The bones were mechanically stripped of soft tissues, weighed (with 0.1 g accuracy), packed into labeled plastic bags and frozen (at a temperature of –25°C) until the beginning of analyses. An Instron Universal Testing Machine (Model 3369) was used to determine bone ultimate strength and maximum elastic strength and yielding deformation, bending point resistance and load-to-deformation ratio. The geometric properties of bones (cross-section area, second moment of interia, mean relative wall thickness) and cortical indexes (cortical layer, cortical index, cortical surface, cortical surface index) were estimated on the basis of measuring the external and internal horizontal and vertical axes in the cross section of the bones at the site of fracture. Bone mineralization was degreased and dried to a constant weight in a muffle furnace and mineral content was determined. On 21st day of life the body weight of chickens receiving an admixture of lemon balm and nettle was significantly higher (P < 0.01) compared to the body weight of birds fed with AGP, hop and lime and control groups. The highest slaughter weight was recorded in chickens fed on a mix with an addition of nettle (2435 g), while significantly lower body weight (P < 0.05) was revealed in the control group (2112 g) and the group receiving hops (2109 g). The addition of lime, lemon balm, pansy and nettle significantly (P < 0.05) increased the slaughter yield of chicks compared to the control group, the AGP group and the group receiving hops. The largest increase in bone elasticity occurred as a result of using additives such as hop, pansy and nettle in the mixes. The value of the dy in these groups compared to the control group and the group receiving an antibiotic were on average more than 20% higher. The value of the Wf in the group receiving pansy compared to the control group and the group receiving AGP were higher by 22.4% and 21.9% respectively (P < 0.05). Regardless of the species of herb added higher values were recorded for the following parametres: Ix, A, CS and Wy/dy. A 2% addition of hop, nettle and pansy increased the dy value, whereas an addition of hop, lemon balm and pansy contributed to increased Wy compared to bone properties measured in the control group and in the group receiving the antibiotic. The body weight of chicks in experimental groups (except for the group fed on nettle) on the 42nd day of breeding was similar to the body weight of control chicks and chicks fed on mixes with an antibiotic. Moreover, the conversion of feed per 1 kg of weight gain with the use of lime, lemon balm and/or nettle did not deviate from the conversion of feed by birds in the control group and the group receivig antantibiotic. The introduction of lime, lemon balm, pansy and nettle increased the slaughter yield and the addition of pansy, mint and nettle contributed to a reduction in the share of abdominal fat compared to the AGP group.
15

Breeding performance, apparent survival, nesting location and diet in a local population of the Tawny Owl Strix aluco in Central Lithuania over the long-term

58%
Grasyte G., Rumbutis S., Dagys M., Treinys R.
Acta Ornithologica
|
2016
|
tom 51
|
nr 2
In the present study, we used 37-year long dataset on Tawny Owls from the annual monitoring of nestboxes at a sample plot in Central Lithuania. We expected that Tawny Owls responded to changes in land use practices, stemming from a change in both political and economic system, which may affect prey abundance and composition, breeding performance and demography. To analyze temporal changes in monitored parameters, we divided the study period into three phases (1978-1989,1990-2001 and 2002-2014), corresponding to different socio-economic conditions. The number of nesting pairs of Tawny Owls decreased significantly in the last 13 years of the study, but the number of successful pairs fluctuated without any trend. The clutch size and number of nestlings varied without significant trends, but nesting success improved over the last 13 years. Annual apparent survival probability of the female Tawny Owls did not vary significantly over the study period (model averaged values between 0.71 and 0.73). Owls occupied nestboxes irrespective to the distance from the agricultural land during the first two study periods, but since early 2000s, owls tended to occupy nestboxes located deeper in the forest. Birds and small mammals were similarly important as prey items by biomass. Since the 1990s, the share of Microtus voles significantly decreased in the diet, while that of birds increased. In summary, changes in the diet, improved nesting success of the Tawny Owl and tendency of nesting in forest interior may indicate ongoing complex responses to the changes in environmental conditions.
16

Nestbox use and reproductive parameters of Tree Sparrows Passer montanus: are they affected by the presence of old nests?

58%
Garcia-Navas V., Arroyo L., Sanz J. J.
Acta Ornithologica
|
2008
|
tom 43
|
nr 1
32-42
There is a controversy over the effects of old nest reuse on the breeding biology of hole nesters. Some authors have shown that the presence of old nest material could increase ectoparasite pressure and/or reduce cavity size, whereas others argue that it could facilitate nest-building and serve as an informative cue for breeding birds. However, the possible functions of old nests may not be limited to the reproductive period in burds that perform autumnal courtship or use nest cavities as shelters during the winter season, as is the case with the Tree Sparrow. The importance of the presence of old nest material on nest box choice during the non-breeding period and its implications on the subsequent breeding performance of this multi-brood species are assessed. Occupancy rates and reproductive parameters (such as phenology, clutch size, nestling condition, breeding success) were compared between woodcrete and wooden nest boxes with and without old nest material inside. During the non-breeding period no effect of box type or its content on nest box selection was discovered, but in spring it was found that the strong preference of birds for breeding in woodcrete nest boxes was independent of the presence of old nests. In relation to this latter point, evidence was found that old nest reuse could negatively affect the reproductive output of Tree Sparrows: clutches were laid later, nestlings had longer wings (which presumably fledged earlier) and reproductive success was lower in nest boxes containing old nest material. The results of this study suggest that, taking the non-breeding and breeding seasons as a whole, the accumulation of old nest material seems to be detrimental rather than advantageous to this species.
17

Nest quality in relation to adult bird condition and its impact on reproduction in Great Tits Parus major

58%
Alvarez E., Barba E.
Acta Ornithologica
|
2008
|
tom 43
|
nr 1
3-9
Birds' nests are special structures built with reproductive aims. Size and structure of the nest can arise from evolutionary trade-offs between benefits such as the insulation from unfavourable conditions, maintenance of eggs or chicks, or security against predation, and costs such as energy spent in construction of the nest and the risk of predation in more visible nests. Therefore, building a good nest is beneficial in terms of reproductive output but expensive in terms of time and energy, so probably only "good" parents would be able to build "good" nests. Our objective was to study possible relationships between the quality of the parents and the quality of the nest, and between the quality of the nest and breeding performance in a Great Tit Parus major population. We found positive relationships between different components of the nest quality and components of breeding performance. However, we did not find any significant relationship between quality of the parents and that of the nest. A weak, though significant positive correlation was found between female size and breeding success rate.
18

Changes in breeding phenology and performance of Wood Warblers Phylloscopus sibilatrix in a primeval forest: a thirty-year perspective

58%
Wesolowski T., Maziarz M.
Acta Ornithologica
|
2009
|
tom 44
|
nr 1
The reproductive behaviour of Wood Warblers was studied in a primeval forest area in the Białowieża National Park (E Poland). Observations carried out during twelve seasons (1976-1979, 1985-1988, 2002-2005) in deciduous and coniferous old-growth habitats spanned a 30-year period. The present paper examines whether the birds advanced their breeding dates during that time and whether any long-term shifts in fecundity or productivity were detectable. Though temperatures in the settlement period (the second half of April) rose, neither males nor females significantly advanced their dates of arrival. Wood Warblers bred earlier in 2002-2005 than in the two previous periods — the combined effect of earlier female arrival and shortening of post settlement breaks. Clutch size declined with season, was smaller in the coniferous habitat and in rodent outbreak years, but no long-term trend was perceptible. Apart from two exceptionally successful years (2003 and 2004) breeding losses remained high during the whole study. Predation was responsible for 80-95% of them and was concentrated on the nestling stage. Overall Wood Warbler phenology and breeding performance in BNP have changed relatively little during the last 30 years. These findings support the results of other studies demonstrating the remarkable resilience of this primeval forest biota to environmental change.
19

Breeding performance of Blue Tits Cyanistes caeruleus ultramarinus in relation to habitat richness of oak forest patches in north-eastern Algeria

58%
Ziane N., Chabi Y., Lambrechts M. M.
Acta Ornithologica
|
2006
|
tom 41
|
nr 2
20

Clutch size and breeding performance of Marsh Tits Parus palustris in relation to hole size in a primeval forest

58%
Wesolowski T.
Acta Ornithologica
|
2003
|
tom 38
|
nr 1
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