Patterns of microhabitat use and seed collection within populations of heteromyid rodents

1985 ◽  
Vol 63 (2) ◽  
pp. 325-330
Author(s):  
Robert T. M'Closkey
Keyword(s):  
Age Groups ◽  
Rodent Species ◽  
Microhabitat Use ◽  
Female Resident ◽  
Seed Collection ◽  
Heteromyid Rodents ◽  
Cheek Pouches ◽  
Number Of Seeds

Microhabitat use and seeds in cheek pouches were examined in four species of heteromyid rodent. Individuals of each species were classified as male or female, resident or transient, and adult or juvenile. The following question is addressed: are there any differences in microhabitat use and seed collection within rodent species and are these differences associated with the sex, residence, or age of individuals? For microhabitats, there were significant differences among individuals for each species analyzed. However, these differences could not be attributed to sex, residence, or age groups within populations. In addition, there were no differences within rodent species in the variety or number of seeds contained in individual cheek pouches. In spite of apparent differences in microhabitat use among heteromyid species, individual rodents are extremely variable in their use of microhabitats.

Microhabitat use of different age groups of snake-eyed skink and Eastern green lizard

2016 ◽  
Vol 37 (2) ◽  
pp. 191-198 ◽  
Author(s):  
Dániel Kovács ◽  
István Kiss
Keyword(s):  
Habitat Management ◽  
Age Groups ◽  
Carpathian Basin ◽  
Microhabitat Use ◽  
Forest Edges ◽  
Environmental Niche ◽  
The Balkans ◽  
Natural Grasslands ◽  
Lacerta Viridis ◽  
First Time

Although Ablepharus kitaibelii and its subspecies are wide-spread, being distributed from the Carpathian Basin through the Balkans to Iraq, their habitat and environmental niche is poorly known. Ablepharus kitaibelii fitzingeri is almost entirely limited to the Carpathian Basin, and is amongst the most strictly protected and least known reptiles of Central and Eastern Europe. The main aim of our study was to determine habitat use preferences of different age groups of A. kitaibelii fitzingeri and Lacerta viridis. The occurrence of green lizard was determined by the abundance of refugia rather than by the naturalness of grasslands. The snake-eyed skink prefers semi-natural grasslands with abundant tussock-forming grass or sedge species, avoiding densely shrubby places. For the first time, we show that woodland mosaics lacking shrubs and temporary grasslands next to forest edges are important for the species. Microhabitat use by snake-eyed skink varies with age group; adults preferring shady edge zones rich in leaf litter and shadier grassland spots provided by woodland mosaics, whereas juveniles were found in natural, more open grasslands far from forest edges and in woodland mosaics with dense shrubby understory. Our results contribute to a better understanding of the ecological needs of A. kitaibelii fitzingeri. Our methodology could be adapted to other species and subspecies of Ablepharus. Based on our results, it is important to reconsider habitat management activities, which should not be limited to shrub control: the main goal should be the development of a diverse habitat structure.

scholarly journals Use of microhabitat and activity patterns of two lizard species from a seasonal dry forest in northern Colombia

2020 ◽  
Vol 15 (2) ◽  
pp. 153-164
Author(s):  
Pedro Luis Atencia ◽  
Cristian José Castillo ◽  
Luis Fernando Montes
Keyword(s):  
Activity Patterns ◽  
Age Groups ◽  
Spatial Dimension ◽  
Forest Edge ◽  
Dry Forest ◽  
Physical Parameters ◽  
Microhabitat Use ◽  
Forest Fragment ◽  
Lizard Species ◽  
Sympatric Distribution

In this work, the microhabitat use and activity patterns of two lizard species with sympatric distribution were evaluated in a dry forest fragment within the department of Sucre, northern Colombia. Data was collected in May, June, September and October of 2017, using the active search method limited by time (7:00 and 19:00 hours). Substrates used, spatial distribution and time of capture were recorded for individuals of the species Loxopholis rugiceps (Cope 1869) and Lepidoblepharis sanctaemartae (Ruthven 1916). Complementarily, environmental and physical parameters were recorded, which allowed us to characterise the microhabitats of the species. A total of 276 lizards were recorded, 177 belonging to the species Loxopholis rugiceps and 99 to Lepidoblepharis sanctaemartae. The results showed similar resource use by the two species for the spatial dimension, with both exploiting different terrestrial elements mainly from the interior forest, followed by the riverbed stream and forest edge. Differences were found in the daily activity patterns between species, with individuals of L. sanctaemartae more frequently recorded in the morning hours and L. rugiceps in the afternoon hours. The activity patterns did not differ by age groups: juveniles and adults. Both species were more frequently found in the litter substrate within the forest, followed by rocks and bare ground. Our results indicate that both species are tolerant to matrix conditions, however, they require internal forest conditions to exploit food resources and refuge.

scholarly journals Evolution and diversity of bat and rodent Paramyxoviruses from North America

2021 ◽  
Author(s):  
Brendan B Larsen ◽  
Sophie Gryseels ◽  
Hans W Otto ◽  
Michael Worobey
Keyword(s):  
North America ◽  
De Novo ◽  
Rodent Species ◽  
Degenerate Primers ◽  
Mortality And Morbidity ◽  
Wild Mammals ◽  
Viral Attachment ◽  
Novel Host ◽  
Heteromyid Rodents ◽  
Single Well

Paramyxoviruses are a diverse group of negative-sense, single-stranded RNA viruses of which several species cause significant mortality and morbidity. In recent years the collection of paramyxoviruses sequences detected in wild mammals has substantially grown, however little is known about paramyxovirus diversity in North American mammals. To better understand natural paramyxovirus diversity, host range, and host specificity, we sought to comprehensively characterize paramyxoviruses across a range of diverse co-occurring wild small mammals in Southern Arizona. We used highly degenerate primers to screen fecal and urine samples and obtained a total of 55 paramyxovirus sequences from 12 rodent species and 6 bat species. We also performed illumina RNA-seq and de novo assembly on 14 of the positive samples to recover a total of 5 near full-length viral genomes. We show there are at least 2 well-supported clades of rodent-borne paramyxoviruses, while bat-associated paramyxoviruses formed a putative single well-supported clade. Using structural homology modeling of the viral attachment protein, we infer that three of the five novel viruses likely bind sialic acid in a manner similar to other Respiroviruses, while the other two viruses from Heteromyid rodents likely bind a novel host receptor. We find no evidence for cross-species transmission, even among closely related sympatric host species. Taken together, these data suggest paramyxoviruses are a common viral infection in some bat and rodent species present in North America, and illuminate the evolution of these viruses.

Microhabitat Use by Heteromyid Rodents: Effects of Artificial Seed Patches

Ecology ◽  
1985 ◽  
Vol 66 (1) ◽  
pp. 211-219 ◽  
Author(s):  
Mary V. Price ◽  
Nickolas M. Waser
Keyword(s):  
Microhabitat Use ◽  
Artificial Seed ◽  
Heteromyid Rodents

scholarly journals Divergent Behavior Amid Convergent Evolution: A Case of Four Desert Rodents Learning to Respond to Known and Novel Vipers

2018 ◽  
Author(s):  
Sonny S. Bleicher ◽  
Burt P. Kotler ◽  
Omri Shalev ◽  
Dixon Austin ◽  
Keren Embar ◽  
...  
Keyword(s):  
Perceived Risk ◽  
Convergent Evolution ◽  
Middle Eastern ◽  
The Novel ◽  
Kangaroo Rats ◽  
Desert Rodents ◽  
Giving Up Density ◽  
Heteromyid Rodents ◽  
Divergent Behavior ◽  
Cheek Pouches

ABSTRACTDesert communities word-wide are used as natural laboratories for the study of convergent evolution, yet inferences drawn from such studies are necessarily indirect. Here, we brought desert organisms together (rodents and vipers) from two deserts (Mojave and Negev). Both predators and prey in the Mojave have adaptations that give them competitive advantage compared to their middle-eastern counterparts. Heteromyid rodents, kangaroo rats and pocket mice, have fur-lined cheek pouches that allow the rodents to carry larger loads under predation risk compared to gerbilline rodents. Sidewinder rattlesnakes have heat-sensing pits, allowing them to hunt better on moonless nights when their Negev sidewinding counterpart, the Saharan horned vipers, are visually impaired. In behavioral-assays, we used giving-up density (GUD) to gage how each species of rodent perceived risk posed by known and novel snakes. We repeated this for the same set of rodents at first encounter and again two months later following intensive “natural” exposure to both snake species. Pre-exposure, all rodents identified their evolutionarily familiar snake as a greater risk than the novel one. However, post-exposure all identified the heat-sensing sidewinder rattlesnake as a greater risk. The heteromyids were more likely to avoid encounters with, and discern the behavioral difference among, snakes than their gerbilline counterparts.

scholarly journals Abundance and microhabitat use of rodent species in crop fields and bushland in Ethiopia

2020 ◽  
Vol 69 (2) ◽  
pp. 1 ◽  
Author(s):  
Kiros Welegerima ◽  
Yonas Meheretu ◽  
Tsegazeabe H. Haileselassie ◽  
Brhane Gebre ◽  
Dawit Kidane ◽  
...  
Keyword(s):  
Rodent Species ◽  
Microhabitat Use ◽  
Crop Fields

Microhabitat use by rodent species in a central Brazilian cerrado

2011 ◽  
Vol 76 (5) ◽  
pp. 651-653 ◽  
Author(s):  
Clarisse R. Rocha ◽  
Raquel Ribeiro ◽  
Frederico S.C. Takahashi ◽  
Jader Marinho-Filho
Keyword(s):  
Rodent Species ◽  
Microhabitat Use ◽  
Brazilian Cerrado

An Ultrastructural Study of the Proliferation Patterns of the Reserve Cells of the Human Cervix Uteri

1972 ◽  
Vol 30 ◽  
pp. 80-81
Author(s):  
Takanori Sohda ◽  
Hiroshi Saito ◽  
Goro Asano ◽  
Katsunari Fukushi ◽  
Katsuya Suzuki ◽  
...  
Keyword(s):  
Ultrastructural Study ◽  
Age Groups ◽  
Point Of View ◽  
University Hospital ◽  
Cervix Uteri ◽  
Morphological Aspect ◽  
Functional Aspect ◽  
Pathological Conditions ◽  
Human Cervix ◽  
Morphological Patterns

Recently, the functional aspect as well as morphological aspect of the reserve cells in the cervix uteri drew much attention in view of the carcinogenesis in squamocolumunar junction. In this communication, the authors elucidate the ultrastructural features of the reserve cells in patients of various age groups visiting our university hospital and affiliated hospital.From conventional light microscopic point of view, the reserve cells tend to be pronounced in various pathological conditions, such as the persisting inflammation, proliferative disorders and irritation of hormones. The morphological patterns of the reserve cells from various stage and degree of irritation were observed.

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