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1

Przegląd wybranych zagadnień z badań etologicznych w pszczelarstwie

100%
Borsuk G.
Kosmos
|
2011
|
tom 60
|
nr 3-4
2

Influence of increased division of labour among worker bees on dead brood removal

100%
Borsuk G.
Journal of Apicultural Science
|
2009
|
tom 53
|
nr 2
3

Czy pszczoly Buckfast mozna uznac za rase?

100%
Borsuk G.
Przegląd Hodowlany
|
2010
|
tom 78
|
nr 04
27-28
4

The internaction of worker bees with have increased genotype variance. II . Cage tests of sugar syrup collecting and mortality

100%
Borsuk G.
Journal of Apicultural Science
|
2011
|
tom 55
|
nr 1
5

The internaction of worker bees with increased genotype variance. I . field tests of sugar syrup collection and storage

100%
Borsuk G.
Journal of Apicultural Science
|
2011
|
tom 55
|
nr 1
6
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Eksperymentalne kompozycje grup robotnic w rodzinie pszczelej a ich zachowania obronne i higieniczne

100%
Borsuk G.
Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
|
2006
|
tom 24
447-455
7

Behawioryzm indykow podyktowany czynnikami zywieniowymi

88%
Borsuk G.
Polskie Drobiarstwo
|
2000
|
tom 09
|
nr 03
3-4
8

Chow zwierzat gospodarskich w Laosie - relacja z pobytu

63%
Borsuk G., Gruszecki T. M.
Przegląd Hodowlany
|
2009
|
tom 77
|
nr 05
31-33
9

Morphometric traits of Buckfast and Caucasian bees

63%
Borsuk G., Olszewski K.
Journal of Apicultural Science
|
2010
|
tom 54
|
nr 1
10

A rare case of overdominance in defensive behaviour of workers in honey bee colonies

63%
Borsuk G., Paleolog J.
Journal of Apicultural Science
|
2005
|
tom 49
|
nr 1
11

Genotypic within-colony interactions and the colony defense in Apis mellifera

63%
Borsuk G., Paleolog J.
Electronic Journal of Polish Agricultural Universities. Series Biology
|
2005
|
tom 08
|
nr 3
The authors studied how genotypic variability within colonies affects their defensive response. Different genetic types of bees were used in the experiments. The influence of the artificially generated within-colony genotypic diversity on the colony defence was investigated. Common stinging assays were performed. Time to the first sting was (TFS) and the number of stings made to the leather target within 2 minutes (NS) were recorded. The contribution of both defensive and gentle workers in the defensive response of the colonies being a physical mix of two such worker types was also studied (film analysis of the bees attacking the target). It was concluded that the within-colony, inter-worker genotypic interactions influenced the colony defense response due to the fact that the quantified value of the colony was usually not the additive composite of diverse worker groups of which the colony was composed. Moreover, the inter-worker interactions were dependent both on the quantified characteristics, which were different for TFS and NS, and on the types of the combined bees. The film analysis revealed that the contribution of defensive/gentle bees to the colony defense only partly reflect the defensive : gentle worker ratio in the colonies composed of such worker types. The contribution also depended on the types of mixed workers.
12

Zimowy przeglad rodziny pszczelej

63%
Borsuk G.
Pasieka
|
2006
|
nr 5
18-19
13

Monitoring of nosemosis in the Lublin region and preliminary morphometric studies of Nosema spp. spores

51%
Ptaszynska A. A., Borsuk G., Mulenko W., Olszewski K.
Medycyna Weterynaryjna
|
2012
|
tom 68
|
nr 10
Nosemosis is serious and widespread bee disease connected with Collony Colapse Disorder (CCD). Monitoring of this disease is crucial to a better understanding of the effect of this disease on the health in both individual bees and at the whole colony level. There is little information about nosemosis in different parts of Poland, which have distinct beekeeping management and climate conditions. It is also important to have quick and easy methods of differentiation of the type of nosemosis (type A - caused by Nosema apis and C - by N. ceranae). Therefore the aims of the study was to determine the degree of Nosema spp. infection amount in the Lublin region during the course of 7 years and to find morphometric parameters which could help to distinguish the differences between spores of N. apis and N. ceranae. In the Lublin region the amount of nosemosis infection has risen from the year 2001 to 2008, with the highest infection scores in 2008. This decreasing number of healthy colonies probably provides evidence of the impact of the greater frequency of N. ceranae infection, which could be the one of the causes of CCD. Scanning Electron Microscopy (SEM) reveals that N. apis and N. ceranae spores differ in their surface structure. Generally, spores of N. ceranae seemed to be more sculptured with deeper ornamentation than those of N. apis. Therefore ornamentation of the spores cell walls with special reference to their area can be considered as a taxonomic criterion for separating these two Nosema taxa.
14

Wpływ fumagilinu na śmiertelność pszczół

51%
Ptaszynska A. A., Smiech R., Borsuk G., Demetraki-Paleolog J.
Pszczelarz Polski
|
2014
|
nr 04
15

Impact of ethanol on Nosema spp. infected bees

51%
Ptaszynska A. A., Borsuk G., Mulenko W., Olszewski K.
Medycyna Weterynaryjna
|
2013
|
tom 69
|
nr 12
Nosema spp. spores are extremely resistant to external stress factors and can survive several years without losing the ability for further infection within the insect body. For this reason, combating nosemosis is difficult. Some beekeepers add ethanol to the sucrose solution before the winter to prevent nosemosis infection and to cure already infected colonies. Others feed infected colonies with herbal ethanol extracts. Therefore the aim of this study was to evaluate the ethanol impact on bees infected with Nosema spp. Four groups of uninfected and Nosema spp. infected bees were fed with sugar-water syrup (1:1) supplemented with ethanol at the following concentrations: 10%, 5% and 2.5% and 0% as a control (only a sucrose syrup). Generally, bees consumed 10% EtOH solution in an amount even 50% lower than in other concentrations. The impact of EtOH on the increase of bees’ mortality was observed at a 10% EtOH concentration for healthy bees and even from 5% EtOH concentration for Nosema spp. infected bees. In our study the highest number of Nosema spp. infestation was noticed for bees fed with 5% EtOH and the lowest pH level was also measured for this group of bees. Therefore, a clear correlation was observed between the feeding bees with EtOH, which resulted in the acidification of bees, and the degree of Nosema spp. infestation. A synergistic effect of the ethanol and nosemosis on the rise of the mortality of bees has been observed. The addition of ethanol to sucrose syrup facilitates conditions for the development of nosemosis in honey bees. The strongest effect of ethanol on the level of Noseama spp. infection was observed for the 5% ethanol solutions. Moreover, ethanol at 10% concentration in sugar syrup exerts severe toxic effects even on healthy bees. All these factors induced immune-suppression in bees and enhanced the level of Nosema spp. infestation.
16

Laboratory assessment of the effect of nanosilver on longevity, sugar syrup ingestion, and infection of honeybees with Nosema spp.

51%
Borsuk G., Paleolog J., Olszewski K., Strachecka A.
Medycyna Weterynaryjna
|
2013
|
tom 69
|
nr 12
After the withdrawal of Fumagillin, there is no drug which is sufficiently effective against nosema disease. Therefore, intensive research is conducted in order to find new nosemacides. Microsporidia from the genus Nosema are regarded one of the causes of Colony Collapse Disorder (CCD). Hence, any new compound that may be useful in the nosemathosis treatment may be of great importance for veterinary practice. The aim of the study was to assess the effect of a nanosilver-supplemented diet on worker-bee longevity and on the level of worker-bee infection with Nosema spp. in honeybees in cage tests. The diet supplemented with 25 ppm of nanosilver decreased the number of nosema spores. Therefore the compound might be considered as useful in the nosemosis disease therapy. On the other hand, in experiment I, supplementation of the syrup with 25 ppm of nanosilver significantly shortened worker-bees’ lifespan. This, however, was not observed in experiment II. Honeybees fed with syrup supplemented with 25 ppm of nanosilver consumed the greatest amounts of the syrup. Moreover, bees fed with syrup supplemented with 12.5 and 25 ppm of nanosilver exhibited increasing contents of silver in their bodies.
17

Location of Nosema spp. spores within the body of the honey bee

51%
Ptaszynska A. A., Borsuk G., Anusiewicz M., Mulenko W.
Medycyna Weterynaryjna
|
2012
|
tom 68
|
nr 10
Nosemosis is a serious honeybee disease linked to Colony Collapse Disorder (CCD). It cause many changes at the individual bee level, which also affects the health of the entire bee colony. N. ceranae and N. apis are not tissue specific as was previously thought and besides the ventriculus epithelium their spore are also present in other tissue, such as Malpighian tubules, hypopharyngeal glands, salivary glands, and fat bodies. Emplacement of nosema infection in honeybee glands interferes with the production of the royal jelly, honey, bee bread. Moreover spores remaining in the honeybee glands are a potential reservoir of infection. The aim of the research was to determine the correlation among the number of Nosema spores in whole bees, as well as in their ventriculus and hypopharyngeal glands. Nosema-infected honey bees were collected in the spring, when there should be a comparable degree of Nosema infection level in all tissues. Three independent experiments were conducted. In these studies the number of spores in the hypopharyngeal glands was the lowest and the highest results were observed for ventriculus samples. A large number of spores in the hypopharyngeal glands was also observed. This can be the cause of a reduction or loss of these glands’ function; moreover, it may increase the horizontal transmission of the infection within a hive as well as to a queen bee.
18

Impact of nosemosis on the intestinal yeast flora of honey bees

51%
Borsuk G., Ptaszynska A. A., Olszewski K., Paleolog J.
Medycyna Weterynaryjna
|
2013
|
tom 69
|
nr 12
Intestinal microflora is a very important part of the digestive system in every animal, and plays a role in the synthesis of vitamins and the metabolism of many toxic chemical compounds. The indigenous intestinal flora of bees changes even as a result of changing their diet from natural to artificial or placing them in cages. Such factors have an impact on the health of bees and on the strength of whole colonies. In our study, intestinal fungi isolated from healthy bees and from bees infected with Nosema spp. belonged to two genera: Candida and Saccharomyces. The approximate numbers of yeast CFUs (colony forming units) obtained from healthy Apis mellifera carnica and Buckfast bees were, respectively, 2880-5180 and 1056-4120. Apis mellifera carnica and Buckfast bees were similarly sensitive to slight Nosema spp. infections, but heavy infestations had a greater impact on the intestinal microflora of A. m. carnica. The degree of Nosema spp. infestation had an impact on the quantitative composition of the intestinal microflora of bees. Slightly infected bees of Apis mellifera carnica had up to 44 915 yeast CFUs per bee, and Buckfast bees up to 28 705 yeast CFUs per bee. Surprisingly, a heavy infestation reduced the number of yeast CFUs to no more than 120 in A. m. carnica bees and to no more than 164 in Buckfast bees. Therefore, in studies in which the number of yeast CFUs is used as the main indicator of stress in bees, the potential presence and the degree of Nosema spp. infestation needs to be taken into account.
19

The use of RAPD-PCR analysis in genetic diversity estimation in Apis mellifera honeybee

51%
Borsuk G., Bus-Kicman M., Jezewska-Witkowska G., Paleolog J.
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
|
2009
|
tom 46
The use of RAPD-PCR analysis in genetic diversity estimation in Apis mellifera honeybee. The study was designed to determine the utilty of fi ve RAPD-PCR arbitrary primers 539, 514, 694, 691and 652 in estimation of genetic diversity in ree honeybee breeds: A. m. caucasica, A. m. carnica and Buckfast. Arbitrary primer 514 proved most useful, since it generated the biggest number of RAPD-PCR products and bands characteristic for two honeybee breeds. The examined bee breeds displayed a large genetic similarity ranging from 0,9356 to 0,9818.
20

Life span of worker honeybees reared in colonies kept on small-cell combs

51%
Olszewski K., Borsuk G., Paleolog J., Strachecka A.
Medycyna Weterynaryjna
|
2014
|
tom 70
|
nr 12
Between 2011 and 2013, in laboratory cage tests, we compared life spans of bees reared in colonies kept on small-cell combs (cell width of 4.93 mm) that were either treated or untreated against varroatosis, as well as life spans of bees reared in colonies kept on standard-cell combs (cell width of 5.56 mm), both treated and untreated against varroatosis. Maintaining colonies on small-cell combs, combined with the lack of strong parasitic pressure from V. destructor, extended the life span of these bees in comparison with that of bees from standard-cell combs. The keeping of colonies on small-cell combs increased the longevity of bees reared on them and heavily infested by the parasites. Intensive infestation by V. destructor mites shortened the life span of bees, regardless of comb cell width, as confirmed by significant correlation coefficients between the parameters defining the scale of infestation and the life span of bees, while the specifics of the interrelation between the worker life span and the scale of infestation depended on the cell width (small/standard). Hence, comb cell width affects the biology of both the parasite and the host, as well as the relationship between them. Therefore, analysing biological connections between A. mellifera colonies and V. destructor in the context of different comb cell widths seems a very promising direction for research.
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