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29 results for “sex and body size”
Paper data and code of manuscript: Intraspecific variation on heat tolerance in a model ectotherm: effects of body mass, cell size, oxygen and sex
<p>When using the data or code from this manuscript, please cite it as:</p><p><strong>Leiva FP</strong>, Santos M, Rezende E, & Verberk WCEP. 2021. Paper data and code of manuscript: Intraspecific variation on heat tolerance in a model ectotherm: effects of body mass, cell size, oxygen and sex. Zenodo. <a href="https://doi.org/10.5281/zenodo.5120028">https://doi.org/10.5281/zenodo.5120028</a>.</p>
Home range use in the West Australian seahorse Hippocampus subelongatus is influenced by sex and partner's home range but not by body size or paired status
<p><span>These data and scripts form the basis for </span>Kvarnemo C, Andersson SE, Elisson J, Moore GI and Jones AG (2021). Home range use in the West Australian seahorse <em>Hippocampus subelongatus</em> is influenced by sex and partner's home range but not by body size or paired status. Journal of Ethology 39: 235–248. https://doi.org/10.1007/s10164-021-00698-y. The abstract below is from this paper:</p> <p>Genetic monogamy is the rule for many species of seahorse, including the West Australian seahorse Hippocampus subelongatus. In this paper, we revisit mark-recapture and genetic data of H. subelongatus, allowing a detailed characterization of movement distances, home range sizes and home range overlaps for each individual of known sex, paired status (paired or unpaired) and body size. As predicted, we find that females have larger home ranges and move greater distances compared to males. We also confirm our prediction that the home ranges of pair-bonded individuals (members of a pair known to reproduce together) overlap more on average than home ranges of randomly chosen individuals of the opposite or same sex. Both sexes, regardless of paired status, had home ranges that overlapped with, on average, 6–10 opposite-sex individuals. The average overlap area among female home ranges was significantly larger than the overlap among male home ranges, probably reflecting females having larger home ranges combined with a female biased adult sex ratio. Despite a prediction that unpaired individuals would need to move around to find a mate, we find no evidence that unpaired members of either sex moved more than paired individuals of the same sex. We also find no effect of body size on home range size, distance moved or number of other individuals with which a home range overlapped. These patterns of movement and overlap in home ranges among individuals of both sexes suggest that low mate availability is not a likely explanation for the maintenance of monogamy in the West Australian seahorse.</p>
Data for: Wild microbiomes of striped plateau lizards vary with sex, body size, and reproductive season
<p><span><span>Long-term natural studies are valuable for examining the effects of host demographics and environmental factors on animal microbiomes, and how those effects interact and shift over time. We examined how the cloacal microbiome of Sceloporus virgatus (the striped plateau lizard) varies under natural conditions in southeastern Arizona, USA, in a multi-year study</span><span>. Cloacal swabs were collected from wild-caught lizards across their entire active season over three years. Analyses of 16S rRNA data generated on the Illumina platform revealed cloacal microbiomes of </span><span>S. virgatus </span><span>vary as a function of sex, season, size, and reproductive state, and do so independently of one another. Briefly, microbial diversity was higher in females than in males, increased with body size, was lowest in both sexes during the reproductive season, and was lowest in females when they were vitellogenic. It was not significantly affected by hibernation. This study highlights the importance of long term, wide scale microbiome studies for capturing accurate perspectives on microbiome diversity and composition in a given species. It also serves as a warning for comparisons of microbiomes across species, as each may be under a different suite of selective pressures from external or innate factors, which may differ in a species-specific manner.</span></span></p>
Sex, body size, and winter weather explain migration strategies in a partial migrant population of American Kestrels (Falco sparverius)
<p>Given increasing evidence that climate change affects the annual cycles of birds, it is important to understand the mechanisms underlying individual migration strategies and population-level patterns in partial migrants. In this study, we found that thermoregulation (body size and winter temperatures) was a key driver of American Kestrel (<em>Falco</em> <em>sparverius</em>) migration decisions. The annual proportion of migrants in the population, however, was not explained by winter weather and may be the result of differential survival. We measured stable hydrogen isotope values (δD) of talon tissues collected from 501 breeding and overwintering birds to distinguish migrant from resident kestrels in a partially migratory population of American Kestrels in southwestern Idaho in 2013–2021. We then evaluated drivers of migration decisions by assessing potential correlates of migration strategies, whether individuals switched migration strategies between years, and whether the proportion of migrants in the population changed over time or was correlated with winter weather. Male kestrels were 1.6 times more likely to migrate than females, and in colder than average winters, smaller birds of both sexes were more likely to migrate than larger birds. Only 27% of 26 recaptured individuals showed evidence of switching their migration strategies on an annual basis. There was no temporal trend in the proportion of migrants in the population, but proportions varied between years. Interestingly, there was no association between winter minimum temperature anomalies and annual migrant proportions in the population, suggesting that differential over-winter survival, or other stochastic processes, may play an important role in population composition. As winters continue to warm, fewer kestrels may migrate and more may remain resident on breeding grounds. However, it is unclear how changes in migration strategies might affect population-level patterns and resilience to climate change.</p>
Figure 2 in New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host
Figure 2 Larva of Gigantolaelaps wolffsohni from NP Chiloé, Chile. A. Full body of larvaeG. wolffsohni (10x). B. Zoom to gnathosoma of larvae G. wolffsohni (40x).
Figure 1 Localities where G in New records of Gigantolaelaps wolffsohni (Mesostigmata: Laelapidae) in Chile, an ectoparasite of Oligoryzomys longicaudatus (Rodentia: Cricetidae): ecological aspects and relation to body size and sex of their host
Figure 1 Localities where G. wolffsohni were found and ecoregions in Chile. 1. National Park (NP) Bosque Fray Jorge; 2. NP Las Chinchillas; 3. National Reserve (NR) Lago Peñuelas; 4. NP La Campana; 5. Sierras de Bellavista; 6. Termas del Flaco; 7. NR Altos de Lircay; 8. Parque Inglés; 9. Quilmo; 10. NP Nonguén; 11. Santa Elena; 12. NP Laguna del Laja; 13. NP Nahuelbuta; 14. Angol; 15. Bosque San Martín experimental station; 16. Gorbea; 17. Puyehue; 18. Hornopirén; 19. NP Chiloé; 20. NP Patagonia; 21. NP Tamango. All localities represent a new distributional record except the locality number 10 and 19. Yellow: Mediterranean ecoregion, green: Template Forest ecoregion, blue: Magellanic ecoregion.
Fig. 9 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 9 – Polynomial regression graph between elytra width of Nebria castanea females and the springtail abundance.
Fig. 7 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 7 – Boxplots of elytra width of Nebria castanea females as a function of landform. p-value of N. castanea morphometric analysis with Kruskal-Wallis test, that evaluate the presence of significant differences in body size between landforms with ice (active rock glacier) and without ice (fossil rock glacier and scree slope). Asterisk highlights significant values.
Fig. 3 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 3 – Boxplot of Nebria germarii body parameters as a function of sex (F=female; M=male). p-value of the Kruskal-Wallis tests for N. germarii body size as a function of sex. Asterisk highlights significant values.
Fig. 5 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 5 – PCA analysis graphs. Blue stars=active rock glacier specimens; Gold squares=fossil rock glacier specimens; Green dot=scree slope specimens.
Fig. 6 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 6 – Boxplot of head width of Nebria germarii females as a function of landform. p-value of N. germarii morphometric analysis with Kruskal-Wallis test, that evaluate the presence of significant differences in body size between landforms with ice (active rock glacier) and without ice (fossil rock glacier and scree slope). Asterisk highlights significant values.
Fig. 2 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 2 – Dorsal view of Nebria germarii and representation of the measured body parameters. For the meaning of the letters see the text (Photo by A. Carlin).
Fig. 4 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 4 – Boxplot of Nebria castanea body parameters as a function of sex (F=female; M=male). p-value of the Kruskal-Wallis tests for N. castanea body size as a function of sex. Asterisk highlights significant values.
Sex, body size, and winter weather explain migration strategies in a partial migrant population of American Kestrels (Falco sparverius)
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Data for: Wild microbiomes of striped plateau lizards vary with sex, body size, and reproductive season
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Home range use in the West Australian seahorse Hippocampus subelongatus is influenced by sex and partner’s home range but not by body size or paired status
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Fig. 8 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 8 – Linear regression graph between elytra width of Nebria castanea females and the soil pH.
Fig. 1 in Sex-ratio and body size plasticity in two cold-adapted ground beetles co-occurring in a periglacial area of the European Alps (Coleoptera: Carabidae)
Fig. 1 – Sampling plan: distribution of pitfall traps at the Lazaunkar site.
Data from: Sex, body size, and boldness shape the seasonal foraging habitat selection in southern elephant seals
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Data from: Thermal tolerance in the cellophane bee <em>Colletes inaequalis</em> reflects early spring adaptation and is independent of body size and sex
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.