Wyniki wyszukiwania

1

Ultrastructure of the egg capsules of the Ecuadoran stoneflies [Plecoptera]

100%

Rosciszewska E.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2000

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tom 42

|

nr 1

2

The ultrastructure and the formation of the egg capsule in Isohypsibius granulifer Thulin, 1928 (Tardigrada: Eutardigrada)

86%

Poprawa I., Lipowska A.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2008

|

tom 50

|

nr 1

3

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Late Cretaceous gastropod egg capsules from the Netherlands preserved by bioimmuration

86%

Zaton M., Taylor P. D., Jagt J. W. M.

Acta Palaeontologica Polonica

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2013

|

tom 58

|

nr 2

Clusters of gastropod egg capsules, inferred to be of neritoids and attached to the inner shell wall of the ultimate whorl of a large volutid gastropod, are here recorded from the upper Nekum Member (Maastricht Formation; late Maastrichtian) of the ENCI−Heidelberg Cement Group quarry, St Pietersberg (Maastricht, southeast Netherlands). Because the aragonitic shell of the volutid has dissolved, the outlines of the egg capsules are now revealed on the steinkern of indurated biocalcarenite, having been subsequently overgrown by cheilostome bryozoan colonies and preserved as mould bioimmurations. This represents the first example of gastropod eggs preserved through bioimmuration, as well as the first record of gastropod eggs from the Cretaceous.

4

Egg capsule structure of the stonefly Protonemura intricata [Ris 1902] [Plecoptera: Nemouridae]

86%

Rosciszewska E.

Acta Biologica Cracoviensia. Series Zoologia

|

1996

|

tom 38

5

Egg capsules organization in tropical stoneflies of the family Perlidae

72%

Rosciszewska E., Fenoglio S., Bohaczyk S., Domagala I., Bialowas M., Gaweda M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2008

|

tom 50

|

nr 1

6

Structure and ultrastructure of the egg capsule of Thermobia domestica [Packard] [Insecta, Zygentoma]

72%

Poprawa I., Rost M. M.

Folia Biologica

|

2004

|

tom 52

|

nr 3-4

7

Panceriella emiratensis sp. nov. (Eucestoda, Linstowiidae) from desert monitor lizard, Varanus griseus (Daudin, 1803) in the United Arab Emirates

58%

Schuster R. K.

Acta Parasitologica

|

2012

|

tom 57

|

nr 2

Two hundred and twenty seven cestodes of the genus Panceriella were detected in the small intestine of a desert monitor lizard, Varanus griseus in the Dubai Emirate of the United Arab Emirates. Panceriella emiratensis sp. nov. is considerably shorter than the type species P. varanii and can be easily distinguished by the presence of an unsegmented neck, smaller numbers and smaller diameter of testes. Gravid segments contain a distinctly lower number of egg capsules.

8

Catshark egg capsules from a Late Eocene deep-water methane-seep deposit in western Washington State, USA

58%

Kiel S., Peckmann J., Simon K.

Acta Palaeontologica Polonica

|

2013

|

tom 58

|

nr 1

Fossil catshark egg capsules, Scyliorhinotheca goederti gen. et sp. nov., are reported from a Late Eocene deep−water methane−seep calcareous deposit in western Washington State, USA. The capsules are preserved three−dimensionally and some show mineralized remnants of the ribbed capsule wall consisting of small globular crystals that are embedded in a microsparitic matrix. The globules are calcitic, but a strontium content of 2400–3000 ppm suggests that they were origi− nally aragonitic. The carbonate enclosing the egg capsules, and the capsule wall itself, show 13C values as low as −36.5‰, suggesting that formation was induced by the anaerobic oxidation of methane and hence in an anoxic environ− ment. We put forward the following scenario for the mineralization of the capsule wall: (i) the collagenous capsules expe− rienced a sudden change from oxic to anoxic conditions favouring an increase of alkalinity; (ii) this led to the precipitation of aragonitic globules within the collagenous capsule wall; (iii) subsequently the remaining capsule wall was mineralized by calcite or aragonite; (iv) finally the aragonitic parts of the wall recrystallized to calcite. The unusual globular habit of the early carbonate precipitates apparently represents a taphonomic feature, resulting from mineralization mediated by an organic matrix. Taphonomic processes, however, are at best contributed to an increase of alkalinity, which was mostly driven by methane oxidation at the ancient seep site.

9

Diversification of the follicular cells in the panoistic ovary of the stone fly Perlodes intricata [Pictet, 1841] [Plecoptera: Perlodidae] during choriogenesis

58%

Rosciszewska E.

Zoologica Poloniae

|

1996

|

tom 41

|

nr 1-4

10

Ultrastructural studies on the formation of egg envelopes in fulgoromorphans [Insecta, Hemiptera, Fulgoromorpha: Dictyopharidae]

58%

Pyka-Fosciak G., Jankowska W., Szklarzewicz T.

Folia Biologica

|

2003

|

tom 51

|

nr 3-4

11

Egg number-female body weight relationship in freshwater snail [Viviparus viviparus L.] population in a reservoir

58%

Jakubik B.

Polish Journal of Ecology

|

2007

|

tom 55

|

nr 2

Studies on the fecundity of V. viviparus were carried out in the years 1990– 1994 in selected littoral sites of the Zegrzyński Reservoir (Central Poland) (60 km long, mean depth ca. 3.5 m, maximum depth at the dam up to 9 m, mean retention time from 1 to 15 days) and in outflow stretches of its tributaries. All sites were dominated by fertile females (i.e. having embryos) that lived in aggregations. Mean numbers of females ranged between 30 and 250 ind. m⁻². Females of III (shells 12.1 – 20.0 mm wide and 12.1 – 25.0 m high) and IV (20.1 – 25.0 mm width and 25.1 – 35.0 mm height) size class dominated. The embryos were noticed in females of II (8.1 – 12.0 mm width and height of the shell), III and IV size class and mean number of embryos per female was from 0.9 to 6.7, from 1.1 to 9.6 and from 2.0 to 9.1 for II, III and IV class respectively. Analysis of embryonic development revealed the presence of three growth stages in oviducts of females: the oval, transparent egg capsules (called the youngest embryos), egg capsules with visible contour of a shell (called medium embryos) and snails with a shell (the oldest embryos). Embryos in a form of oval, transparent egg capsules and snails with developed shell dominated in particular size classes in analysed sites. Analysis of the correlation coefficient showed significant positive relationship between the mean sum of embryos and shell height and width, and dry weight of female’s body and shell weight. Most significant correlation was found between dry body weight and mean number of embryos. The number of embryos in particular growth stages was also related to biometric indices as shown by the analysis of correlation coefficients. The number of oldest embryos (fully developed snails with a shell) increased with the increase of shell height and width. Female’s dry body weight, on the other hand, was best correlated with the youngest growth stage of embryos (oval, transparent egg capsules). Described relationships indicate the importance of the size of V. viviparus females for reproductive success and for survival and “condition” of young snails.

12

The structure and the formation of egg shells in the parthenogenetic species Dactylobiotus dispar Murray, 1907 [Tardigrada: Eutardigrada]

58%

Poprawa I.

Folia Biologica

|

2005

|

tom 53

|

nr 3-4

13

Structure of ovaries and formation of egg envelopes in the stonefly, Leuctra autumnalis Aubert, 1948 [Plecoptera: Leuctridae]. Ultrastructural studies

58%

Poprawa I., Baran A., Rosciszewska E.

Folia Biologica

|

2002

|

tom 50

|

nr 1-2

Ograniczanie wyników

Ultrastructure of the egg capsules of the Ecuadoran stoneflies [Plecoptera]

The ultrastructure and the formation of the egg capsule in Isohypsibius granulifer Thulin, 1928 (Tardigrada: Eutardigrada)

Late Cretaceous gastropod egg capsules from the Netherlands preserved by bioimmuration

Egg capsule structure of the stonefly Protonemura intricata [Ris 1902] [Plecoptera: Nemouridae]

Egg capsules organization in tropical stoneflies of the family Perlidae

Structure and ultrastructure of the egg capsule of Thermobia domestica [Packard] [Insecta, Zygentoma]

Panceriella emiratensis sp. nov. (Eucestoda, Linstowiidae) from desert monitor lizard, Varanus griseus (Daudin, 1803) in the United Arab Emirates

Catshark egg capsules from a Late Eocene deep-water methane-seep deposit in western Washington State, USA

Diversification of the follicular cells in the panoistic ovary of the stone fly Perlodes intricata [Pictet, 1841] [Plecoptera: Perlodidae] during choriogenesis

Ultrastructural studies on the formation of egg envelopes in fulgoromorphans [Insecta, Hemiptera, Fulgoromorpha: Dictyopharidae]

Egg number-female body weight relationship in freshwater snail [Viviparus viviparus L.] population in a reservoir

The structure and the formation of egg shells in the parthenogenetic species Dactylobiotus dispar Murray, 1907 [Tardigrada: Eutardigrada]

Structure of ovaries and formation of egg envelopes in the stonefly, Leuctra autumnalis Aubert, 1948 [Plecoptera: Leuctridae]. Ultrastructural studies