Wyniki wyszukiwania

1

Fish egg size variability biological significance

100%

Bonislawska M., Formicki K., Korzelecka-Orkisz A., Winnicki A.

Electronic Journal of Polish Agricultural Universities. Series Fisheries

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2001

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tom 04

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nr 2

The results showed the eggs of various species to differ both in terms of their dimensions and volume, the differences being 5 and more than 70fold, respectively.

2

Within-clutch variation in egg dimensions of Loggerhead Shrike [Lanius ludovicianus] in South-Central Florida

75%

Yosef R., Zduniak P.

Biological Letters

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2004

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tom 41

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nr 2

155-162

3

Repeatability and within-cluth variation in egg dimensions in a Hooded Crow Corvus corone cornix population

75%

Zduniak P., Antczak M.

Biological Letters

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2003

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tom 40

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nr 1

4

Egg dimensions of the great Tit [Parus major L.] in Croatia

75%

Dolenec Z., Mrakovcic M., Delic A.

Polish Journal of Ecology

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2005

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tom 53

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nr 1

5

The effect of egg size on hatching rate in the Tree Sparrow Passer montanus [study in Central Poland]

75%

Pinowska B., Barkowska M., Pinowski J., Hahm K. H., Lebedeva N.

Acta Ornithologica

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2002

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tom 37

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nr 1

6

Intrapopulation variation of egg size in the White Stork [Ciconia ciconia] in Southern Poland

75%

Profus P., Tryjanowski P., Tworek S., Zduniak P.

Polish Journal of Ecology

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2004

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tom 52

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nr 1

White Stork (Ciconia ciconia) eggs were studied in Upper Silesia, Southern Poland. The measurements of eggs – their length, breadth, volume and elongation index were collected for 95 nests in years 1974–2002, and repeatability of these measurements was computed. Mean clutch size was 4.05 ± 0.82. Mean egg measurements were: 72.10 ± 2.18 mm, 52.19 ± 1.47 mm, 100.49 ± 6.92 cm³ and 1.38 ± 0.05, for length, breadth, volume and elongation index, respectively. Coefficients of variation for clutch means ranged from 1.68 (breadth) to 4.37 (volume). Mean repeatability estimates were 0.53, 0.68, 0.63, 0.58 for length, breadth, volume and elongation index, respectively. The results obtained suggest that one should expect relatively low or intermediate heritability of egg dimensions in population studied.

7

The effect of trends in ambient temperature on egg volume in the Tree Sparrow Passer montanus

75%

Barkowska M., Pinowski J., Pinowska B.

Acta Ornithologica

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2003

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tom 38

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nr 1

8

Repeatability of egg dimensions within the clutches of Bearded Tit Panurus biarmicus

75%

Surmacki A., Stepniewski J., Zduniak P.

Acta Ornithologica

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2003

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tom 38

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nr 2

The variation in size and shape of Bearded Tit eggs was investigated in the Wielkopolska Region of western Poland in 1988-1992 and 1997-2000. The mean clutch size was 5.47 (95% CL: 5.25-5.70, n = 99), and differed markedly from year to year. Coefficients of variations for the mean egg characteristics in a clutch ranged from 1.91 (breadth) to 4.90 (volume). No significant correlation between egg length and breadth was found. Repeatability estimates were 0.50, 0.48, 0.50, 0.47 for length, breadth, volume and elongation index, respectively. The results suggest a relatively low heritability of egg dimensions in the population studied.

9

Fecundity and egg size in sea trout (Salmo trutta m. trutta L.) in pond conditions

63%

Debowski P., Dobosz S., Grudniewska J., Kuzminski H.

Archives of Polish Fisheries

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2005

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tom 13

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nr 2

During a five-year period, the fecundity and egg size of individual Vistula sea trout marked with PIT tags were studied. The dependencies between fish length, age and the number of times the fish had spawned and its fecundity and egg size were analyzed. Both fecundity and egg size increased as fish length increased. However, after taking into consideration fish growth, fecundity decreased slightly with age while egg size increased. These two traits were mutually inversely correlated. After taking into consideration differences in length, fish that were spawning for the first time were less fecund than their peers at a similar egg size.

10

The effect of egg size on growth and survival of the Tree Sparrow Passer montanus nestlings

63%

Pinowska B., Barkowska M., Pinowski J., Bartha A., Hahm K.-H., Lebedeva N.

Acta Ornithologica

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2004

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tom 39

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nr 2

The paper analyses the effect of egg dimensions (volume, breadth, and length) on the growth and development of Tree Sparrow nestlings on successive days of life. Egg size did not influence nestling mortality. It was found that for most days of nestling life, the mean volume and breadth of eggs were positively correlated with the mean mass of nestlings in the nest. Similarly, the deviation of the volume and breadth of a particular egg from the mean egg volume and breadth in the clutch was positively correlated with the deviation of nestling mass from the mean nestling mass in the nest. Nestling growth and development in terms of asymptotic mass (g), maximum growth rate (g/day), tarsus length, and longest remex length were also positively correlated with egg size. The effect of egg size was particularly pronounced in the period of termination of intensive growth rate, development of thermoregulation, and feather development. It is possible that larger eggs contain more microelements, hormones, antioxidants, and vitamins.

11

Female biometrical characteristics and egg dimensions of the Starling [Sturnus vulgaris L.] in Croatia

63%

Dolenec Z., Kralj J., Mustafic P., Dolenec P.

Polish Journal of Ecology

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2008

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tom 56

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nr 3

545-547

Female biometrical characteristics play an important role in the breeding and contribute to breeding success. The size and shape of Starling (Sturnus vulgaris) eggs in relation to female characteristics were examined. The material was collected in northwestern Croatia (Mokrice region) in 2007. Only first clutches were analysed. Egg length averaged 29.7 mm, egg breadth – 21.2 mm, egg volume – 6810 mm³ and egg shape index – 1.41. The inter-clutch CV amounted 6% for length, 3% for breadth, 10% for volume and 6% for egg shape index. The mean female body mass was equal to 81.8 g, wing length – 128.6 mm and female condition – 0.64. No significant correlation was found between the female biometrical parameters like body mass, wing length, female condition and egg dimensions (like egg length, egg breadth, egg volume) or egg shape. Egg length was marginally correlated with egg breadth. Female body mass was significantly correlated with wing length.

12

Multigenerational and transgenerational side-effects of an insecticide on eggs of Folsomia candida (Collembola)

63%

Szabo B., Bakonyi G.

Polish Journal of Ecology

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2017

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tom 65

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nr 1

Environmental toxicants such as insecticides are able to provoke epigenetic alterations which can be inherited to future generations. The aim of the current study was to assess whether the insecticide Trebon 10F (containing the active ingredient etofenprox) causes multigenerational and/or transgenerational effects on the egg traits of the collembolan Folsomia candida. The parent generation was kept in soil treated with three concentrations of the insecticide. The hatched offspring from each treatment were divided into two groups and were treated in the same manner as their parents (multigenerational effect), or remained untreated (transgenerational effect). The parents reacted with smaller eggs to the insecticide in a concentration dependent manner. Both multigenerational and transgenerational effects were detected in the offspring generations. While neither the number of eggs nor the ratios of the egg diameters (shortest/longest diameter) changed, the egg size increased as the Trebon 10F concentration increased. This is an indication that parents living under insecticide stress transmit this information to their offspring, who react with higher quality egg production. Such alterations in egg traits may have important consequences on the F. candida population dynamic.

13

Fecundity of ninespine stickleback [Pungitius pungitius L.,1758] in the Puck Bay

63%

Sokolowska E., Skora K. E.

Acta Ichthyologica et Piscatoria

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2001

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tom 31

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nr 1

Ninespine stickleback is abundant in the brackish waters of the Puck Bay and its catchment area. The species is common in the overgrown littoral zone. Spawning in the bay is extended, lasting from March to August, the eggs are laid in batches. The fecundity of these fish is relatively low, as with others which show parental care. Sticklebacks lay up to 199 eggs, this being higher than the fecundity of sticklebacks from North America and Eastern Europe and lower than in one of the Japanese forms. The relation between absolute fecundity and body length, and body weight is described by the equations: F = 1.8052ּ10-3ּL2.71 and F = 103.77551ּW0.99, respectively. The fecundity of a fish depends primarily on its weight. The body size and fecundity had no effect on egg size.

14

Size of eggs and duration of embryogenesis in fishes

63%

Bonislawska M., Formicki K., Winnicki A.

Acta Ichthyologica et Piscatoria

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2000

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tom 30

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nr 1

Studies were undertaken on the relationship between egg size and duration of embryogenesis in four freshwater fish species (Salmo trutta L, Esox lucius L., Gasterosteus aculeatus L., Leucaspius delineatus Heck.). Analyses were carried out in a comparative sense (different taxa) as well as with respect to eggs of the same species, or even laid by the same female. In addition to understandable differences of egg size between particular species, considerable differences were observed as regards egg size in fish of the same species, and even originating from the same female. In extreme cases the differences in egg size of the same female reached up to 11 percentage points (linear size) and over 40 (volume)! A strict relationship was found between duration of embryonic development and egg size: the smaller the egg, the shorter its embryogenesis. Biological meaning of this phenomenon has been discussed.

15

Artificial spawning of carp [Cyprinus carpio L.]; the relationship of egg size to weight and age of females

63%

Brzuska E.

Polskie Archiwum Hydrobiologii

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1997

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tom 44

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nr 1-2

16

Duration embryonic development and S-V [surface-volume] coefficient in fish eggs

63%

Bonislawska M., Winnicki A.

Archives of Polish Fisheries

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2000

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tom 08

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nr 2

17

Egg size variation in the Collared Flycatcher Ficedula albicollis in the Bialowieza Forest [NE Poland]

63%

Mitrus C., Rogala B.

Acta Ornithologica

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2001

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tom 36

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nr 1

445 eggs of the Collared Flycatcher from 82 clutches were measured during three breeding seasons (1997-1999). The mean length was 17.82 ± 0.80 mm, breadth — 3.45 ± 0.37 mm and volume — 1.65± 0,14 cm³. Egg dimensions were positively correlated. No significant differences in egg sizes during the three seasons were found. This suggests that the environmental conditions in the Białowieża Forest during the study period did not change or had no influence on egg size. Laying sequence had no influence on egg dimensions; only egg length depended on clutch size. Some characteristics of the females did affect the size of eggs: heavier birds and those with longer tarsi laid larger eggs. Older females did not lay significantly larger eggs than younger females. In conclusion, egg size in the Collared Flycatcher from the Białowieża Forest appears to be influenced more by the characteristics of the female than by environmental conditions..

18

Breeding biology of the Hooded Crow Corvus corone cornix in Warta River valley [W Poland]

63%

Zduniak P., Kuczynski L.

Acta Ornithologica

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2003

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tom 38

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nr 2

The study area (16 km2) in "Ujście Warty" National Park, W Poland — was the valley of a lowland river at its confluence with the River Odra, covered by a mosaic of grassy vegetation and willow scrub. 111 breeding attempts were recorded during 2000-2002. The mean nest density (3.2 nests/km2) was higher than that recorded by other authors in agricultural landscapes, but lower than in urban areas. The nest construction was adapted to fit young willow trees. The mean clutch size was similar to that recorded in other populations (4.43), but eggs were smaller (41.2 mm x 29.1 mm). The hatching success was lower (76%) in comparison with other studies, but the mean number of fledglings (2.15 per nest and 2.96 per nest in successful broods) was relatively high. The main reasons for losses were unhatched eggs, predators, starved nestlings and poor nest construction. We hypothesise that the smaller egg size and lower hatching success recorded in this population was due to unfavourable and unpredictable feeding conditions (floods) during the period of egg formation and egg laying. Later in the season, receding floodwaters laid bare areas suitable for foraging on invertebrates; waterfowl eggs also became readily available. Predation was low (lack of nonbreeding stock of Hooded Crow). As a result of good conditions during chick rearing, the overall reproductive output was relatively high in comparison with other populations.

19

Blowfly infestation at the nestling stage affects egg size in the Pied Flycatcher Ficedula hypoleuca

51%

Potti J.

Acta Ornithologica

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2008

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tom 43

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nr 1

76-82

The long-term effects on the egg size of breeding females that had suffered parasitism when they were nestlings are described for a wild population of Pied Flycatchers naturally parasitized by the blowfly Protocalliphora azurea larvae, a common nest-dwelling, blood-sucking ectoparasite of cavity-nesting birds in the Mediterranean region. As adults, females reared in blowfly-infested nests laid smaller eggs than their counterparts raised in nests not infested by blowflies. This relationship held irrespective of female size, condition and maternal egg size, and was random with respect to female quality and consistent across a female's lifetime. Except for egg size, no long-term effects on host longevity or other fitness components, such as lifetime reproductive success, were detected. Although the mechanisms causing long-term depression of host egg size remain unknown, the recent discovery that Protocalliphora blowflies transmit viruses to nestlings offers new avenues of research on this issue.

20

Inter-nest variability in the egg to hatchling mass ratio in the Common Pochard Aythya ferina: Does female body mass matter?

51%

Horak D., Albrecht T., Klvana P., Musil P.

Acta Ornithologica

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2007

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tom 42

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nr 1

33-38

Ograniczanie wyników

Fish egg size variability biological significance

Within-clutch variation in egg dimensions of Loggerhead Shrike [Lanius ludovicianus] in South-Central Florida

Repeatability and within-cluth variation in egg dimensions in a Hooded Crow Corvus corone cornix population

Egg dimensions of the great Tit [Parus major L.] in Croatia

The effect of egg size on hatching rate in the Tree Sparrow Passer montanus [study in Central Poland]

Intrapopulation variation of egg size in the White Stork [Ciconia ciconia] in Southern Poland

The effect of trends in ambient temperature on egg volume in the Tree Sparrow Passer montanus

Repeatability of egg dimensions within the clutches of Bearded Tit Panurus biarmicus

Fecundity and egg size in sea trout (Salmo trutta m. trutta L.) in pond conditions

The effect of egg size on growth and survival of the Tree Sparrow Passer montanus nestlings

Female biometrical characteristics and egg dimensions of the Starling [Sturnus vulgaris L.] in Croatia

Multigenerational and transgenerational side-effects of an insecticide on eggs of Folsomia candida (Collembola)

Fecundity of ninespine stickleback [Pungitius pungitius L.,1758] in the Puck Bay

Size of eggs and duration of embryogenesis in fishes

Artificial spawning of carp [Cyprinus carpio L.]; the relationship of egg size to weight and age of females

Duration embryonic development and S-V [surface-volume] coefficient in fish eggs

Egg size variation in the Collared Flycatcher Ficedula albicollis in the Bialowieza Forest [NE Poland]

Breeding biology of the Hooded Crow Corvus corone cornix in Warta River valley [W Poland]

Blowfly infestation at the nestling stage affects egg size in the Pied Flycatcher Ficedula hypoleuca

Inter-nest variability in the egg to hatchling mass ratio in the Common Pochard Aythya ferina: Does female body mass matter?