Mongolian Journal of Biological Sciences

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Mongolian Journal of Biological Sciences (MJBS) publishes original articles, review-type articles, notes from the field, short communications, anniversary notes, book reviews and reports of scientific meetings.

Dear Readers,The next article, entitled "Lacking Sexual Size Dimorphism in Some Rodent Species (Rodentia) in Semi-desert...
29/06/2024

Dear Readers,
The next article, entitled "Lacking Sexual Size Dimorphism in Some Rodent Species (Rodentia) in Semi-desert Region of Mongolia", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2024.22.03

Abstract
Body size differences between males and females of the same species are known as s*xual size dimorphisms (SSD). The male-biased and female-biased SSD have been reported simultaneously across numerous clades of mammals. In this study, we used long term monitoring measurement data of five species rodents to test for the existence of SSD in Ikh Nart Nature Reserve, Mongolia. We collected body measurements of Allactaga sibirica, Dipus sagitta, Meriones meridianus, Meriones ungiculatus, and Phodopus roborovskii between 2007 and 2022. We found both significant male-biased and female-biased SSDs in P. roborovskii (N = 661, t = 5.33; df = 602.70; P < 0.001), and D. sagitta (N = 243, t = 2.14; df = 192.9; P < 0.001), respectively. In addition, a small level of male-biased SSD (non-significant SSD) was obtained species from genus Meriones. The non-significant SSD of both s*xes could be related to other important secondary s*xual displays (e.g., olfaction, ornamentation), which play important roles in s*xual selection. Eventually, effective s*xual dimorphism in rodents could be determined by interactions between morphology, body size, ornamentation, behavior, olfaction, and social status.

Dear Readers,The next article, entitled "Composition of Vespid Wasps (Hymenoptera, Vespidae) in the Baitag Bogd Mountain...
29/06/2024

Dear Readers,
The next article, entitled "Composition of Vespid Wasps (Hymenoptera, Vespidae) in the Baitag Bogd Mountains with a First Record of Symmorphus murarius (Linnaeus 1758) in Mongolia", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2024.22.02

Abstract
Fourteen vespid wasp species are listed from the Baitag Bogd Mountains, representing three subfamilies and nine genera. Of these, 13 species are new for the region and one species, Symmorphus murarius (Linnaeus, 1758), is new for Mongolia. The data include specimen information (number, s*x, location, habitat if available, date and collector), previous records in Mongolia (by province), and distribution ranges of the species.

Dear Readers,The next article, entitled "A Newly Recorded Species of the Genus Hedysarum L. (Fabaceae) from Mongolia", h...
29/06/2024

Dear Readers,
The next article, entitled "A Newly Recorded Species of the Genus Hedysarum L. (Fabaceae) from Mongolia", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2024.22.01

Abstract
The family Fabaceae, one of the largest angiosperm families globally, encompasses diverse ecosystems worldwide, notably in Mongolia where it stands as the second largest family. Within this family, Hedysarum L. emerges as the largest genus in the Hedysareae tribe, exhibiting adaptability across Eurasia’s temperate zones. Our study marks the first recorded occurrence of Hedysarum tarbagataicum in Mongolia. Field surveys conducted in the Jargalant Khairkhan Mountain revealed its presence, enriching our understanding through detailed observations, photographs, and specimen collection. This species thrives in arid habitats, notably dry stream beds and stony slopes, often coexisting with various flora. Distinguishing characteristics, like drooping flowers and smooth beans, differentiate it from closely related species. Our findings significantly extend the geographical range of H. tarbagataicum, underscoring its rarity and hinting at potential expansions in Central Asia. However, conclusive assertions demand further floristic exploration in the region. This discovery underscores the significance of continued research and investigating specimen collection for a comprehensive understanding of this species’ distribution.

Dear Readers,The next article, entitled "Autumn Migration Strategy of Asian Dowitchers (Limnodromus semipalmatus) from E...
27/12/2023

Dear Readers,

The next article, entitled "Autumn Migration Strategy of Asian Dowitchers (Limnodromus semipalmatus) from Eastern Mongolia", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2023.21.06

Abstract
The Asian dowitcher (Limnodromus semipalmatus) breeds in the wetlands of southeast Siberia, Mongolia, and northeast China. It is a Near Threatened shorebird species that only occurs in East Asian Australasian Flyway (EAAF) sites. It is reported that its wintering area extends from East India to South Asia, but its migration route remains unknown. Identifying specific migration routes and migratory stopovers is essential for conserving the declining Asian dowitcher populations. We deployed mobile based transmitters that provide information within the mobile network on eight Asian dowitchers from the eastern Mongolia. Based on this information, the migration route, distance, wintering area, time, and speed of migration of the Asian dowitcher were determined. Asian dowitchers passed through China’s Bohai Sea and Lianyungang coast to Indonesia, Malaysia, and Singapore for the winter. This species adopted a coastal migration strategy and traveled an average distance of 4,833 km to reach its wintering grounds. They recover their energy after a long rest and travel long distances in a short time. The duration of the autumn migration varied from individual to individual but averaged 47 days (min=14, max=90). Lianyungang, located on the east coast of China, is an important stopover site for the Asian dowitcher, and the tracked individuals landed and rested in this area. During autumn migration, eight Asian dowitchers used 14 stop over sites along the coast, of which two were nature reserves, three were provincial and local protected areas, three were protected areas near cities, and the remaining six were densely populated areas with no protection.

Dear Readers,The next article, entitled "New Species of the Genus Festuca L. (Poaceae) in Mongolia", has just been publi...
27/12/2023

Dear Readers,
The next article, entitled "New Species of the Genus Festuca L. (Poaceae) in Mongolia", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2023.21.07

Abstract
The article is devoted to the genus Festuca L. of Mongolia. We used 530 sheets of herbarium specimen in Botanic Garden and Research Institute (UBA), Mongolian Academy of Sciences, to revise species composition in the genus Festuca in Mongolia. Festuca vivipara has “squared stem” and viviparous flowers, abaxial sclerenchyma in continuous ring and scabrib surface of lemma of viviparous flowers. Festuca richardsonii Hook. has “dense hairy lemma” and 5-8 narrow discrete strands of abaxial sclerenchyma. Based on differences of morphology and leaf cross section characteristics, Festuca vivipara (L.) Sm. and Festuca richardsonii Hook. are record as new for the Mongolian flora.

Dear Readers,The next article, entitled "Distribution of Vascular Plants in Mongolia – III Part", has just been publishe...
27/12/2023

Dear Readers,
The next article, entitled "Distribution of Vascular Plants in Mongolia – III Part", has just been published.
The online first version of the article is available at the following DOI link: https://doi.org/10.22353/mjbs.2023.21.05

Abstract
In the third part of our series of papers, we selected 40 native taxa from 33 genera of 21 families, considering their high conservation relevance. The chosen 40 species included 19 threatened and four endemic species, and they belong to the following genera: Aconitum L., Adenophora Fisch., Androsace L., Anemonastrum Holub, Arctous Nied., Arnica L., Callianthemum C.A.Mey., Caragana Lam., Chelidonium L., Chrysanthemum L., Cistanche Hoffmanns. & Link., Comarum L., Corydalis DC., Cynomorium L., Dracocephalum L. Echinops L., Farinopsis Chrtek & Soják, Gentiana Tourn., Geranium Tourn., Gymnocarpos Forssk., Heliotropium Tourn., Hylotelephium H.Ohba, Iljinia Korovin ex Iljin, Impatiens Riv. ex L., Kaschgaria Poljakov, Phalacrachena Iljin, Pinguicula L., Plantago L., Potentilla L., Rhododendron L., Salix L., Saxifraga Tourn., Stenosolenium Turcz., and Thalictrum Tourn. Data on endemism, global and regional distribution, natural habitat, and conservation status are provided for each species.

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