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Animals
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Current State of Knowledge on the Physiology and Reproduction of...
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Current State of Knowledge on the Physiology and Reproduction of Bees

A special issue of Animals (ISSN 2076-2615).

Deadline for manuscript submissions: closed (10 May 2024) | Viewed by 5304

Special Issue Editors

Dr. Oskar Wasielewski

E-Mail Website
Guest Editor
Department of Zoology, Poznan University of Life Sciences, Poznan, Poland
Interests: diapause control; insect physiology; neurohormonal regulation; reproduction; solitary bees
Dr. Karol Giejdasz

E-Mail Website
Guest Editor
Department of Zoology, Poznan University of Life Sciences, Poznan, Poland
Interests: bee pollinator management; crop pollination; diapause control of wild bees; life cycle and development of wild bees; solitary bee rearing

Special Issue Information

Dear Colleagues,

Insect pollination is fundamental for most agricultural crops, as well as for the health of the ecosystem. Worldwide insect-pollinated crops have traditionally depended on a single species, the honeybee (Apis mellifera). However, during the past decade the number of honeybee colonies has sharply declined, due to human pressure. Accordingly, there is an increased interest in agricultural exploitation of alternative pollinator species such as native (wild) bees.

In this regard, a deeper understanding of the physiological regulation, exact mating mechanism (including pheromones action) and aspects of reproduction is necessary. This also allows us to protect the bee population before the contamination of the environment by toxic substances, and keep the ecosystem in balance.

This Special Issue aims to improve our understanding of the regulation of metabolic processes, including bee mating and reproduction.

We invite submissions of original research articles and reviews. Research areas may include (but are not limited to) the following: bee physiology, mating behavior and reproduction.

We look forward to receiving your contributions.

Dr. Oskar Wasielewski
Dr. Karol Giejdasz
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • honeybee
  • hormonal regulation
  • insect physiology
  • mating behavior
  • reproduction
  • wild bees

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Published Papers (3 papers)

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Research

19 pages, 3744 KiB  
Article
Seasonal Changes in Hemolymph Protein Level and Hypopharyngeal Gland Size Depending on Age and In-Nest Location of Honeybee Workers
by Jan Musila and Antonín Přidal
Animals 2024, 14(3), 512; https://doi.org/10.3390/ani14030512 - 4 Feb 2024
Cited by 2 | Viewed by 1218
Abstract
A honeybee colony, as a super-organism, is regulated through age-polyethism. A honeybee worker’s age is considered by means of a chronological and biological approach. The biological age is estimated with physiologically related biological markers, e.g., total hemolymph protein content (THP) and hypopharyngeal gland [...] Read more.
A honeybee colony, as a super-organism, is regulated through age-polyethism. A honeybee worker’s age is considered by means of a chronological and biological approach. The biological age is estimated with physiologically related biological markers, e.g., total hemolymph protein content (THP) and hypopharyngeal gland size (HGs), which also vary seasonally. Contemporary insights into the age-related spatial workers’ distribution within the hive nest space regarding biological age are insufficiently clarified. This study aimed to monitor changes in selected physiological markers during the entire season in relation to worker age and their spatial position in the hive nest. THP content and HG size analysis was performed in nine colonies for the entire season to compare the physiological markers within and among the groups of the workers whose ages were known and sampled in different hive parts. Seasonal impact on the biomarkers’ development was confirmed in known-age workers. In the case of HGs, this impact was the most apparent in 4- and 5-week-old workers. For THP, the seasonal impact was the most obvious in 2-week-old workers. The highest THP was found in 1- and 2-week-old workers during the entire season. Biologically younger workers of the same age were located predominantly in upper hive parts consistently throughout the year and vice versa. These workers showed significantly higher THP in comparison with those sampled below. Regarding the chronological age, the downwards, spatially shifting mechanism of workers within the hive nest while they aged was characterized. We recommend storage of diluted hemolymph samples up to one month before performing an assay if necessary. The physiological context, relation to division of labor and benefits for beekeeping practices are discussed. Full article
(This article belongs to the Special Issue Current State of Knowledge on the Physiology and Reproduction of Bees)
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12 pages, 2209 KiB  
Article
Methoprene, a Juvenile Hormone Analog, Causes Winter Diapause Elimination in Univoltine Bee Species Osmia bicornis L.
by Karol Giejdasz, Monika Fliszkiewicz and Oskar Wasielewski
Animals 2023, 13(21), 3344; https://doi.org/10.3390/ani13213344 - 27 Oct 2023
Cited by 1 | Viewed by 1255
Abstract
Osmia bicornis syn. O. rufa is a univoltine bee species in which adults fly in spring and the offspring overwinter as cocooned imagoes. The flight period of solitary bees is short, so methods of control for development and emergence time are needed to [...] Read more.
Osmia bicornis syn. O. rufa is a univoltine bee species in which adults fly in spring and the offspring overwinter as cocooned imagoes. The flight period of solitary bees is short, so methods of control for development and emergence time are needed to synchronize the activity of managed pollinators with blooming. In our study, we tested the effectiveness of a juvenile hormone analog for the prevention of winter diapause. Bees developed in settled nests outdoors or in the laboratory (22 °C) until the end of the pre-pupa stage, then cocoons were removed from the nest cells and treated with a JH analog—methoprene—during the pupa and young imago stages. Then, bees were activated at 25 °C until the adults left the cocoons. Topical application of methoprene to the cocoon at the pupa or imago stage induced the emergence of some adult bees in the pre-diapause period, while no adults emerged when the bees were not treated with methoprene. Most adults emerged (about 50%) when treated with methoprene on 3-week-old cocooned imagoes. Bees treated in the pupal stage had a lower emergence rate (20–30%), but adult bees emerged earlier. The emergence time of adults for the laboratory group was, on average, from 70 to 91 days, and that for outdoor groups was from 57 to 72 days. Full article
(This article belongs to the Special Issue Current State of Knowledge on the Physiology and Reproduction of Bees)
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11 pages, 3987 KiB  
Article
Symptomatic Infection with Vairimorpha spp. Decreases Diapause Survival in a Wild Bumble Bee Species (Bombus griseocollis)
by Margarita Orlova, Monique Porter, Heather M. Hines and Etya Amsalem
Animals 2023, 13(10), 1656; https://doi.org/10.3390/ani13101656 - 17 May 2023
Cited by 2 | Viewed by 2285
Abstract
Vairimorpha, a microsporidian parasite (previously classified as Nosema), has been implicated in the decline of wild bumble bee species in North America. Previous studies examining its influence on colony performance have displayed variable results, from extremely detrimental effects to no observable [...] Read more.
Vairimorpha, a microsporidian parasite (previously classified as Nosema), has been implicated in the decline of wild bumble bee species in North America. Previous studies examining its influence on colony performance have displayed variable results, from extremely detrimental effects to no observable influence, and little is known about the effects it has on individuals during the winter diapause, a bottleneck for survival in many annual pollinators. Here, we examined the effect of Vairimorpha infection, body size, and mass on diapause survival in Bombus griseocollis gynes. We demonstrate that gyne survival length in diapause is negatively affected by symptomatic Vairimorpha infection of the maternal colony but does not correlate with individual pathogen load. Our findings further indicate that increased body mass offers a protective effect against mortality during diapause in infected, but not in healthy, gynes. This suggests that access to adequate nutritional resources prior to diapause might offset the harmful effect of Vairimorpha infection. Full article
(This article belongs to the Special Issue Current State of Knowledge on the Physiology and Reproduction of Bees)
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