micromys minutus
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Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2375
Author(s):  
Linas Balčiauskas ◽  
Raminta Skipitytė ◽  
Andrius Garbaras ◽  
Vitalijus Stirkė ◽  
Laima Balčiauskienė ◽  
...  

In agricultural habitats, diets and trophic positions of syntopic granivorous small mammals are not known sufficiently. Agroecosystems may be quite complex isotopically and the most complex situation concerns the nitrogen-15 isotope as δ15N values are influenced by many internal and external fluxes. We analysed the isotopic niches of striped field (Apodemus agrarius), yellow-necked (Apodemus flavicollis), and harvest (Micromys minutus) mice living sympatrically and syntopically in apple and plum orchards, raspberry and currant plantations, and nearby meadows that were used as control habitats. Carbon (δ13C) and nitrogen (δ15N) stable isotope ratios from hair samples were used as a proxy for their diet. As the main hypothesis, we expected differences in the isotopic niches of these three species, minimising interspecific competition. All species were fully separated according to δ15N values, presuming different amounts of food of animal origin in their diet. The separation of species according to δ13C was not expressed in all habitats. The core dietary niches of these species were fully separated in the apple orchards and raspberry plantations. Intraspecific differences of the isotopic niche were not present in any of the three species: that is, resources were equally used by males and females, adults, subadults, and juveniles.


2021 ◽  
Author(s):  
Fabrice Darinot ◽  
Quentin Le Petitcorps ◽  
Véronique Arnal ◽  
Aurélie Coulon ◽  
Claudine Montgelard

2021 ◽  
Vol 9 ◽  
Author(s):  
Paulina Kozina ◽  
Joanna N. Izdebska ◽  
Rafał Kowalczyk

Despite the widespread belief that an extensive body of knowledge exists for the sucking lice (Anoplura), some of their common, Eurasian or even cosmopolitan species still lack complete taxonomic descriptions, especially those for their nymphal stages. This applies especially to the most common rodent parasites: the lice of the genus Hoplopleura. In Europe, only two of the five most common Hoplopleura species have full taxonomic characteristics with a description of the nymphal stages. This study enriches the current state of knowledge for another species, Hoplopleura longula and presents the first description of its nymphal stages. The study includes five rare louse specimens (two nymphs I, one nymph II, two nymphs III) of H. longula collected from 63 Eurasian harvest mice Micromys minutus. The collected lice were fixed and preserved in 70% ethyl alcohol solution and then placed in polyvinyl-lactophenol to form total preparations. Only two of the five species found in Eurasia (H. acanthopus, H. affinis, H. captiosa, H. edentula and H. longula) have been given full taxonomic descriptions, including immature stages. This paper presents a description of the nymphal stages of H. longula (described for the first time).


Mammalia ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Francesca Occhiuto ◽  
Eman Mohallal ◽  
Geoffrey D. Gilfillan ◽  
Andrew Lowe ◽  
Tom Reader

Abstract The ecology of the harvest mouse (Micromys minutus) is poorly understood, partly because it is a difficult species to monitor. It is commonly associated with reedbeds, where evidence suggests that it experiences strong seasonal fluctuations in abundance. However, it is unknown whether these fluctuations are caused by real changes in population size, or by movement between habitats. This study investigated seasonal changes in population size and habitat use by harvest mice, and other small mammal species, by trapping the reedbed and three associated habitat types: woodland, pasture and arable land. A sampling effort of 9887 trap bouts across nine months, resulted in 70 captures of harvest mice, as well as wood mice (N = 1022), bank voles (N = 252), field voles (N = 9), common shrews (N = 86) and pygmy shrews (N = 7). The reedbed was the habitat with the most captures and highest diversity. Harvest mice were caught exclusively in the reedbed at the beginning of autumn. Wood mice and bank voles experienced fluctuations in population numbers and wood mice also showed seasonal variation in habitat use. Our study supports the idea that harvest mice undergo extreme seasonal fluctuations in abundance in reedbeds, but these do not appear to be related to changes in habitat use.


2021 ◽  
Vol 2020 (20) ◽  
pp. 29-38
Author(s):  
Oksana Markovska ◽  

The study of the species composition and biotope preferences of small mammals around Kolomak had been carried out for four years (2017–2020). During the study period, 9 species of mouse-like rodents and 3 species of insectivores were found. No Cricetulus migratorius, Terricola subterraneus or Microtus oeconomus were found from the theoretically expected species already known for this area. Around Kolomak, 11 biotopes were investigated, including maple-linden oak forest, agrocenoses, dry and flooded meadows, which are located along the banks of a pond and in a gully-ravine system. The first year of research was in a year of high abundance (2017), and then 9 species were immediately discovered, but species with small abundance, such as Crocidura suaveolens, Sorex minutus, and Micromys minutus, were found in years with a small relative abundance of small mammals. Myodes glareolus, Sylvaemus tauricus and Sylvaemus uralensis are dominant species in the captures. According to the trapping results, 2017 was the year of high relative abundance of small mammals, 2018 was the year of the lowest relative abundance, 2019 and 2020 were years with an average relative abundance. During the study period, 6 species were identified in forest biotopes (Apodemus agrarius, Sylvaemus tauricus, Sylvaemus uralensis, Myodes glareolus, Sorex araneus, and Dryomys nitedula). In ecotones with floodplain biotopes, 8 species were found (Apodemus agrarius, Sylvaemus sylvaticus, Sylvaemus uralensis, Mus musculus, Micromys minutus, Myodes glareolus, and Sorex araneus). Four species (Mus musculus, Sylvaemus sylvaticus, Sylvaemus uralensis, and Microtus levis) were discovered near human settlements. In general, biotopes with the greatest species diversity and number of caught individuals are ecotones of dry and floodplain meadows. In years of high abundance, both species diversity and the number of individuals caught in the oak forest and in ecotones near the pond increased. It should be noted that Myodes glareolus was caught in clear-cuts during the two years (2019-2020) only in the summer of 2020. Earlier, not a single specimen of this species was caught there, although there is a dense weed grass cover in this area and the shrub layer has also grown up in some places, and the clear-cut is surrounded by oak forest.


2021 ◽  
Vol 2020 (20) ◽  
pp. 67-72
Author(s):  
Olga Shtyk ◽  
◽  
Zvenyslava Mamchur ◽  

We conducted an analysis of populations of muroid rodents of the Dnister Canyon National Nature Park on the example of the natural landmark “Chervone.” For the investigation of the muroid rodents, we applied the trap-line method using factory-made live traps. According to methodology, the traps were located within a homogeneous habitat and four different sites were studies. Field data collected during 2017 and 2018 (summer and autumn cenuses) in four different habitats were analysed. The species composition of muroid rodents was investigated in four different biotopes (habitats) near the Dzurynskiy waterfall: hornbeam forest, pine forest, floodplain of the Dzuryn river, and pasture. The studied habitats were identified according to the National Habitat Catalogue of Ukraine. During the research, 75 specimens of muroid rodents were caught in 800 trap-nights. We recorded six species of muroid rodents: Sylvaemus tauricus L., Sylvaemus sylvaticus L., Apodemus agrarius Pallas, Micromys minutus L., Myodes glareolus Schreber, and Microtus arvalis Pallas. The most numerous species was Sylvaemus tauricus — 23 individuals (31 %). The quantity of other species was as follows: Apodemus agrarius (28 %), Sylvaemus sylvaticus (17 %), Myodes glareolus (16 %), Microtus arvalis (7 %), and Micromys minutus (1 %). The abundance of rodents was lower during the summer period compared to autumn, which can be related to the anthropogenic pressure on the investigated area. In addition, we investigated the sex and age structure of muroid rodent populations. We discovered that 45 individuals out of 75 were males and 35 were females. Additionally, 63 individuals were adults (Ad.) and 12 were juveniles (juv.). To summarise the received data, we calculated the number of individuals per 100 trap-nights. The abundance of individuals fluctuated from near 3 ind./100 t.-n. (Sylvaemus tauricus) to 0.125 ind./100 t.-n. (Micromys minutus). The relatively low species diversity of muroid rodents in the Dnister Canyon National Nature Park could be the result of small areas of insular habitats (separated territories with relatively similar landscape) and strong fragmentation of the researched area.


Biologija ◽  
2020 ◽  
Vol 66 (4) ◽  
Author(s):  
Indrė Lipatova

The aim of this study was to present data on the distribution of Hystrichopsylla fleas collected from different animals in Lithuania. The study was done by analyzing collections of fleas from 2011 to 2017. A total of 96 fleas of the genus Hystrichopsylla were collected from nine mammalian species (Apodemus flavicollis, Apodemus agrarius, Micromys minutus, Myodes glareolus, Microtus oeconomus, Microtus arvalis, Sorex araneus, Neomys fodiens, and Glis glis). Morphological analysis showed that all fleas were of the species Hystrichopsylla orientalis Smit, 1956.


2020 ◽  
Vol 180 ◽  
pp. 122-127
Author(s):  
Lucia Minoli ◽  
Charles A Assenmacher ◽  
Brona N Ranieri ◽  
James C Tarrant ◽  
Molly E Church ◽  
...  

2020 ◽  
pp. 184-187
Author(s):  
Volodymyr Terletsky

Materials are collected and generalised on the overground nesting activity of 4 rodent species under conditions of the north Carpathian taiga: the red squirrel (Sciurus vulgaris), the edible dormouse (Glis glis), the hazel dormouse (Muscardinus avellanarius), and the harvest mouse (Micromys minutus). The locality is characterised by a combination various habitats. Common and unique variants of nests of these species are described, particularly the arrangement by the hazel dormouse of its own nests in nests of the Eurasian wren and song thrush, an unusual nest of the red squirrel, and the nesting of the edible dormouse in an abandoned dress.


Author(s):  
Oksana Markovska

Eight of the eleven expected rare and non-abundant species of small mammals were recorded in the studied territory: Crocidura suaveolens, Sorex minutus, Neomys fodiens, Dryomys nitedula, Cricetulus migratorius, Terricola subterraneus, Micromys minutus, and Mus spicilegus. Crocidura suaveolens was found in both dry meadows and floodplain biotopes, and it was also recorded nearby to field-protective plantations and human settlements. Sorex minutus was also more common in dry meadows and in floodplain biotopes. Neomys fodiens is a typical floodplain endemic. Dryomys nitedula was more common in oak forests and it is prone to synanthropy. Cricetulus migratorius was found in steppe areas and near fields of agricultural crops. Terricola subterraneus was recorded only in a dry maple-linden oak forest. Micromys minutus prefers floodplain biotopes. Mus spicilegus was found on agricultural crops and in steppe areas.


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