scholarly journals Do rebel workers in the honeybee Apis mellifera avoid worker policing?

Apidologie ◽  
2019 ◽  
Vol 50 (6) ◽  
pp. 821-832
Author(s):  
Wiktoria Rojek ◽  
Karolina Kuszewska ◽  
Monika Ostap-Chęć ◽  
Michał Woyciechowski

AbstractA recent study showed that worker larvae fed in a queenless colony develop into another female polyphenic form—rebel workers. The rebel workers are more queen-like than normal workers because they have higher reproductive potential revealed by more ovarioles in their ovaries. However, it was unclear whether eggs laid by rebel workers avoided worker policing. Worker-laid eggs are normally eaten by other workers in a queenright colony. The aim of this study was to compare the survival of three classes of eggs, namely, those laid by normal workers, rebel workers, and the queen. All eggs were tested in queenright colonies. We expected that rebel workers would avoid policing by laying more queen-like eggs. Contrary to our expectations, eggs laid by rebel workers were eaten by other workers, as were eggs laid by normal workers, and only a few worker-laid eggs (both normal and rebel) survived for more than 3 h. Therefore, in a queenright colony, eggs laid by rebel workers do not avoid policing.

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3245
Author(s):  
Aneta Strachecka ◽  
Krzysztof Olszewski ◽  
Karolina Kuszewska ◽  
Jerzy Paleolog ◽  
Michał Woyciechowski

Rebel workers develop from eggs laid by the previous queen, before it went swarming and left the colony orphaned, until the emergence of a new queen. In contrast to normal workers developing in the queen’s presence, rebels are set to reproduce and avoid rearing of successive bee generations. They have more ovarioles in their ovaries, as well as more developed mandibular glands and underdeveloped hypopharyngeal glands, just like the queen. We posited that rebels are not only similar to queens in some anatomical features, but also develop in a shorter time in comparison to normal workers. Therefore, the aim of this study was to compare preimaginal development duration in rebel and normal workers. The results show that rebels, i.e., workers with a higher reproductive potential, had a significantly shorter preimaginal development period (mean ± SD, 19.24 ± 0.07 days) than normal workers (22.29 ± 0.32 days). Our result confirmed that workers who develop in a queen-less colony undergo a shorter preimaginal development than those in a queen-right colony.


2018 ◽  
Vol 74 (1) ◽  
pp. 6013-2018
Author(s):  
ANETA STRACHECKA ◽  
ALEKSANDRA ŁOŚ ◽  
JOANNA FILIPCZUK ◽  
MICHAŁ SCHULZ

Honey bees (Apis mellifera) are constantly exposed to contact with many types of pathogens. However, during evolution they developed a number of immune mechanisms. At the individual level, they comprise 1) resistance mechanisms associated with anatomical and physiological barriers of the body, 2) cell-mediated immunity involving hemocytes (including plasmocytes, lamellocytes, and granulocytes), 3a) congenital humoral resistance related to the activity of lysozyme (N-acetylmuramylhydrolase), the prophenylooxidase system (ProPO) and hemagglutinins (lectins), and 3b) induced humoral resistence based on the action of antimicrobial peptides: apidicines, hymenoptecin, and defensins. In addition to the individual resistance of each bee, there is also a defense mechanism activated at the colony level. Shared secretion resistance is connected with the presence of antipathogenic compounds in secreta and in bee products. Social immunity is associated with hygienic and nursing behaviors, as well as with age polyethism in the colony, swarming (and the emergence of rebel workers), and the changing behavior of sick individuals. Many aspects and interactions between different types of resistance and immunity still remain unexplored. However, current research trends revolve around clarifying uncertainties so as to strengthen the natural resistance of bees and fight against pathogens that threaten the insects..


2012 ◽  
Vol 60 (1) ◽  
pp. 65-73 ◽  
Author(s):  
J. Rangel ◽  
J. J. Keller ◽  
D. R. Tarpy

2004 ◽  
Vol 51 (2) ◽  
pp. 113-116 ◽  
Author(s):  
N. Ch�line ◽  
S. J. Martin ◽  
F. L. W. Ratnieks

2008 ◽  
Vol 99 (4) ◽  
pp. 376-381 ◽  
Author(s):  
L. A. Jordan ◽  
M. H. Allsopp ◽  
M. Beekman ◽  
T. C. Wossler ◽  
B. P. Oldroyd

2013 ◽  
Vol 100 (5) ◽  
pp. 473-477 ◽  
Author(s):  
Kevin J. Loope ◽  
Thomas D. Seeley ◽  
Heather R. Mattila

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Aneta Strachecka ◽  
Krzysztof Olszewski ◽  
Karolina Kuszewska ◽  
Jacek Chobotow ◽  
Łukasz Wójcik ◽  
...  

AbstractEvolution has created different castes of females in eusocial haplodiploids. The difference between them lies in their functions and vulnerability but above all in their reproductive potentials. Honeybee queens are highly fertile. On the other hand, the workers are facultatively sterile. However, rebel workers, i.e. workers that develop in a queenless colony, reproduce more often than normal workers. As a result, the fat body of these bees, which apart from acting as the energy reserve, is also the site of numerous metabolic processes, had to specialize in different functions perfected over millions of years of eusocial evolution. Assuming that the variety of functions manifests itself in the pleomorphic structure of the fat body cells, we predicted that also different parts of the fat body, e.g. from different segments of the abdomen, contain different sets of cells. Such differences could be expected between queens, rebels and normal workers, i.e. females with dramatically different reproductive potentials. We confirmed all these expectations. Although all bees had the same types of cells, their proportion and segmental character corresponded with the caste reproductive potential and physiological characteristics shaped in the evolutionary process. The females with an increased reproductive potential were characterized by the presence of oenocytes in the third tergite and high concentrations of compounds responsible for energy reserves, like glucose, glycogen and triglycerides. Queens had very large trophocytes, especially in the third tergite. Only in workers did we observe intercellular spaces in all the segments of the fat body, as well as high protein concentrations—especially in the sternite. As expected, the rebels combined many features of the queens and normal workers, what with other findings can help understand the ways that led to the origin of different castes in females of eusocial Hymenoptera.


Apidologie ◽  
2021 ◽  
Author(s):  
Karolina Kuszewska ◽  
Wiktoria Rojek

AbstractLearning ability, which allows individuals to adjust their behaviour to changing environmental conditions, has a considerable positive impact on individual fitness. However, in addition to benefits, learning also incurs a cost, which means that investment in learning and maintaining learned skills can lead to trade-offs impacting other biological functions. Here, we tested whether a trade-off exists between learning skills and reproductive potential in honeybee workers. For this purpose, we compared learning ability between two groups of workers that differed in reproductive potential—normal and rebel workers. The results showed that workers with high reproductive potential (rebels), measured according to the number of ovarioles in the ovary, learned faster than normal workers with low reproductive potential. Moreover, by performing separate regression analyses within the rebel and non-rebel worker groups, we found that the reproductive potential of workers was positively correlated with their learning ability. The results show that in honeybees, there is no trade-off in resource allocation between two costly biological functions, learning and reproduction.


Author(s):  
Karolina Kuszewska ◽  
Agnieszka Wącławska ◽  
Michal Woyciechowski
Keyword(s):  

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