Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
4,157
datasets available to search
ShareScore release 0.9.0
Dataset results
4,157 results for “Survival.”
Data from: Divergent estimates of herd-wide caribou calf survival: ecological factors and methodological biases
Population monitoring is a critical part of effective wildlife management, but methods are prone to biases that can hinder our ability to accurately track changes in populations through time. Calf survival plays an important role in ungulate population dynamics and can be monitored using telemetry and herd composition surveys. These methods, however, are susceptible to unrepresentative sampling and violations of the assumption of equal detectability, respectively. Here we capitalized on 55 herd-wide estimates of woodland caribou (Rangifer tarandus caribou) calf survival in Newfoundland, Canada using telemetry (n = 1,175 calves) and 252 herd-wide estimates of calf:cow ratios (C:C) using herd composition surveys to investigate these potential biases. These data included 17 herd-wide estimates replicated from both methods concurrently (n = 448 calves and n =17 surveys) which we used to understand which processes and sampling biases contributed to disagreement between estimates of herd-wide calf survival. We used Cox proportional hazards models to determine if estimates of calf mortality risk were biased by the date a calf was collared. We also used linear mixed effects models to determine if estimates of C:C ratios were biased by survey date and herd size. We found that calves collared later in the calving season had a higher mortality risk and that C:C tended to be higher for surveys conducted later in the autumn. When we used these relationships to modify estimates of herd-wide calf survival derived from telemetry and herd composition surveys concurrently, we found that formerly disparate estimates of woodland caribou calf survival now overlapped (within a 95% confidence interval) in a majority of cases. Our case study highlights the potential of under-appreciated biases to impact our understanding of population dynamics and suggests ways that managers can limit the influence of these biases in the two widely applied methods for estimating herd-wide survival.
Data from: Survival strategy of the endangered tree Acer catalpifolium Rehd., based on 13C fractionation
<p>We conducted a field investigation and evaluation of 13C natural abundance to determine the growth habit and propagation strategy of Acer catalpifolium Rehd., a tree species native to China that is highly endangered. The results showed that A. catalpifolium is a K-selected strategist and pioneer species. Its narrow ecological range limits its geographical distribution, and poor fecundity limits its population size. The analysis of 13C natural abundance showed that A. catalpifolium does not use organic matter for reproduction when its stand volume is less than 1.08×106 cm3 or it is less than 18.6 m tall, but it does use this strategy when it has a sufficient 1.08×106 cm3 stand volume or more or is taller than 18.6 m. If environmental conditions are not conducive (e.g., severe human disturbance, cliff edges, or fierce interspecific competition) to the continued growth of the tree, A. catalpifolium may allocate organic matter for reproduction. Human disturbance seems to promote the population expansion of A. catalpifolium. We provide our suggestions for the promotion and protection of A. catalpifolium as a species.</p>
Data from: Long-term and interactive effects of different mammalian consumers on growth, survival and recruitment of dominant tree species
<p>Throughout the world, numerous tree species are reported to be in decline, either due to increased mortality of established trees or reduced recruitment. The situation appears especially acute for oaks, which are dominant features of many landscapes in the northern hemisphere. Although numerous factors have been hypothesized to explain reductions in tree performance, vertebrate herbivores and granivores may serve as important drivers of these changes. Here, using data from 8- and 14-year-old exclosure experiments, we evaluated the individual and interactive effects of large and small mammalian herbivores on the performance of three widespread oak species in California – coast live oak (<i>Quercus agrifolia</i>), California black oak (<i>Q. kelloggii</i>) and Oregon white oak (<i>Q. garryana</i>). Although impacts varied somewhat by species and experiment, herbivory by black-tailed deer (<i>Odocoileus hemionus columbianus</i>) reduced the height and survival of juvenile coast live oaks and altered their architecture, as well as reduced the abundance of black oak seedlings, the richness of woody species and the cover of non-oak woody species. Small mammals (<i>Microtus californicus</i> and <i>Peromyscus maniculatus</i>) had even more widespread effects, reducing the abundance of black oak seedlings and the height and cover of all three oak species. We also detected numerous interactions between small mammals and deer, with one herbivore having positive or negative effects on oak abundance and cover when the other herbivore was either present or absent. For example, deer often had negative effects on seedling abundance only when, or even more so when, small mammals were present. In summary, mammalian consumers play crucial roles in limiting oak recruitment by reducing seedling abundance, maintaining trees in stunted states and preventing them from reaching sapling stages and becoming reproductive. Interactions between large and small mammals can also alter the intensity and direction of their effects on trees.</p>
Behavioural change during dispersal and its relationship to survival and reproduction in a cooperative breeder
<p>(1) The ability of dispersing individuals to adjust their behaviour to changing conditions is instrumental in overcoming challenges and reducing dispersal costs, consequently increasing overall dispersal success. Understanding how dispersers' behaviour and physiology change during the dispersal process, and how they differ from resident individuals, can shed light on the mechanisms by which dispersers increase survival and maximise reproduction. (2) By analysing individual behaviour and concentrations of faecal glucocorticoid metabolites (fGCM), a stress-associated biomarker, we sought to identify the proximate causes behind differences in survival and reproduction between dispersing and resident meerkats (Suricata suricatta). (3) We used data collected on 67 dispersing and 108 resident females to investigate (i) which individual, social, and environmental factors are correlated to foraging and vigilance, and whether the role of such factors differs among dispersal phases, and between dispersers and residents; (ii) how time allocated to either foraging or vigilance correlated to survival in dispersers and residents; and (iii) the link between aggression and change in fGCM concentration, and their relationship with reproductive rates in dispersing groups and resident groups with either long-established or newly established dominant females. (4) Time allocated to foraging increased across dispersal phases, while time allocated to vigilance decreased. Time allocated to foraging and vigilance correlated positively, and negatively respectively, with dispersers' group size. We did not find a group size effect for residents. High proportions of time allocated to foraging correlated with high survival, and more so in dispersers, suggesting that maintaining good physical condition may reduce mortality during dispersal. Further, while subordinate individuals rarely reproduced in resident groups, the conception rate of subordinates in newly formed dispersing groups was equal to that of their dominant individuals. Mirroring conception rates, in resident groups, fGCM concentrations were lower in subordinates than in dominants, whereas in disperser groups, fGCM concentrations did not differ between subordinates and dominants. (5) Our results, which highlight the relationship between behavioural and physiological factors and demographic rates, provide insights into some of the mechanisms that individuals of a cooperative species can use to increase overall dispersal success.</p>
Figure 14 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 14. Thalamocyclops soqotraensis (Mirabdullayev et al., 2002) comb. nov. (a) Female urosome, dorsal; (b) female abdominal somites, ventral; (c) male urosome, ventral (illustrations from type series, RBINSc COP 4492–4495).
Figure 15 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 15. Thalamocyclops soqotraensis (Mirabdullayev et al., 2002) comb. nov. (a) Antenna, caudal; (b) female antennules; (c) mandible; (d) maxilla; (e) maxillule; (f) maxilliped, caudal; (g) proximal maxillipedal segment, frontal (illustrations from type series, RBINSc COP 4492–4495).
Figure 16 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 16. Thalamocyclops soqotraensis (Mirabdullayev et al., 2002) comb. nov. (a) Male antennule; (b), leg 3 endopodite of female, frontal; (c) leg 3 endopodite of male, caudal; (d) leg 4 endopodite of female, frontal; (e) leg 4 endopodite of male, caudal (illustrations from types, RBINSc COP 4492–4495).
Figure 10 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 10. Thalamocyclops pachypes gen. nov., sp. nov. (a) Antennule in copepodid stage III; (b) idem, in copepodid stage IV (female); (c) idem, in copepodid stage V (female).
Figure 9 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 9. Thalamocyclops pachypes gen. nov., sp. nov. (a) Antenna in copepodid stage I, caudal; (b) idem, in copepodid stage II; (c) idem, in copepodid stage III; (d) antennule in copepodid stage I; (e) idem, in copepodid stage II.
Figure 13 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 13. Thalamocyclops pachypes gen. nov., sp. nov. (a, b) Copepodid stage III: (a) leg 3, frontal; (b) leg 4, frontal; (c, d) Copepodid stage IV: (c) leg 4, frontal (second endopodite segment detached); (d) leg 4 second endopodite segment; (e) female copepodid stage V: leg 4, caudal.
Figure 5 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 5. Thalamocyclops pachypes gen. nov., sp. nov. (a) Leg 1, frontal (medial spine of basis depicted separately and enlarged, not to scale); (b) leg 2, caudal (endopodite detached); (c) female leg 3, frontal (second exopodite segment depicted separately); (d) pair of male third legs, frontal (second endopodite segment of right ramus and second exopodite segment of left exopodite not illustrated); (e) second endopodite segment of male leg 3, frontal, enlarged.
Figure 1 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 1. Thalamocyclops pachypes gen. nov., sp. nov. (a) Habitus of ovigerous female in dorsal view; (b) idem, in lateral view; (c) habitus of adult male in dorsal view.
Figure 4 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 4. Thalamocyclops pachypes gen. nov., sp. nov. (a) Mandible; (b) mandibular biting edge, side view; (c) maxillule; (d) maxilliped, frontal; (e) maxilliped, caudal; (f) labrum; (g) maxillar endopodite, caudal; (h) maxillar basis, caudal; (i) maxillar distal endite, caudal; (j) maxillar syncoxa and basis, frontal.
Figure 12 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 12. Thalamocyclops pachypes gen. nov., sp. nov. (a, b) Copepodid stage I: (a) leg 1, caudal; (b) leg 2, caudal (endopodite illustrated separately); (c–e) Copepodid stage II: (c) leg 1, frontal; (d) leg 2, frontal; (e) leg 3, frontal.
Figure 3 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 3. Thalamocyclops pachypes gen. nov., sp. nov. (a) Antennary coxobasis and first endopodite segment, frontal; (b) antenna, caudal; (c) female antennule, dorsal; (d) male antennule, dorsal (last segments detached; aesthetascs broken, insertion sockets indicated with asterisk).
Figure 2 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 2. Thalamocyclops pachypes gen. nov., sp. nov. (a) Fifth leg bearing somite depicted from anterior to posterior; (b) idem, in dorsal view; (c) idem, in ventral view; (d) female abdomen, dorsal view; (e) idem, lateral view; (f) idem, ventral view.
Figure 6 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 6. Thalamocyclops pachypes gen. nov., sp. nov. (a) Pair of female fourth legs, frontal (endopodite of right leg not illustrated); (b) idem, caudal (exopodite of left leg not illustrated); (c) pair of male fourth legs, frontal (second segment of left endopodite and right exopodite not illustrated); (d) fifth and sixth leg bearing somites of male, ventral.
Figure 7 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 7. Thalamocyclops pachypes gen. nov., sp. nov. (a, b) Undefined naupliar stage, in dorsal and ventral view; (c–e) habitus of copepodid stages I to V, respectively, in dorsal view.
Figure 11 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 11. Thalamocyclops pachypes gen. nov., sp. nov. (a) Antennule in copepodid stage IV (male); (b) antennule in copepodid stage V (male); (c) postcephalic somites 4 and 5 in female copepodid stage V, lateral; (d) idem, in male copepodid stage V, lateral.
Figure 8 in Thalamocyclops pachypes gen. nov., sp. nov. (Copepoda: Cyclopoida: Cyclopidae), a crevicular cyclopine from Socotra Island (Yemen): tale of a remarkable survival drive
Figure 8. Thalamocyclops pachypes gen. nov., sp. nov. (a) Postcephalic somites 2–4 in copepodid stage I, ventral; (b) idem, lateral view; (c) postcephalic somites 3 to 5 in copepodid stage II, ventral; (d) postcephalic somites 3 and 4 in copepodid stage II, lateral; (e) postcephalic somites 4 and 5 in copepodid stage III, lateral; (f) postcephalic somites 4 and 5 in female copepodid stage IV, lateral.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.