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.
245
datasets available to search
ShareScore release 0.9.0
Dataset results
245 results for “Cannibalization”
Fig. 42. Natalina quekettiana dracomontana subsp. n in Revision of the larger cannibal snails (Natalina s. l.) of southern Africa - Natalina s. s., Afrorhytida and Capitina (Mollusca: Gastropoda: Rhytididae)
Fig. 42. Natalina quekettiana dracomontana subsp. n., radula, holotype (NMSA V7992/T2451): (A) rachidian and lateral teeth, scale bar = 0.5 mm; (B) vestigial marginal teeth, scale bar = 100 µm.
Low incidence of sibling cannibalism among brood parasitic cuckoo catfish embryos
Open the record for dataset details and reuse information.
Early filial cannibalism revisited
Open the record for dataset details and reuse information.
Genetic diversity and efficacy of natural selection in spiders with pre-copulatory sexual cannibalism
Open the record for dataset details and reuse information.
Preferential cannibalism as a key stabilizing mechanism of intraguild predation systems with trophic polymorphic predators
Open the record for dataset details and reuse information.
Data from: Direct and indirect effect of cannibalism and intraguild predation in the two sibling Harmonia ladybird beetles
<p>In this study, we focused on the direct (i.e. predation) and indirect (i.e. potential threat from coexisting with a larger individual) effects of cannibalism and intraguild predation (IGP) during larval stages of two sibling ladybird beetles. These effects play an important role in the coexistence of the generalist–common Harmonia axyridis and specialist–rare H. yedoensis (Coleoptera: Coccinellidae). Direct predation effect of cannibalism and IGP were asymmetric in the two sibling ladybird beetles; the fourth instar larvae of H. axyridis were better intraguild predators than cannibals, while the reverse was true in the larvae of H. yedoensis. Neither cannibalism nor IGP significantly affected female body weight in either species. Larval H. axyridis surviving exposure to cannibalism or IGP had a reduced number of ovarioles as adults, whereas adult H. yedoensis ovarioles were not affected. For the indirect effects, longer developmental times in males and females and a lower total number of ovarioles in females were detected in H. axyridis. In H. yedoensis, shorter developmental time of males, lighter adult weight and fewer total ovarioles in females were observed. Olfactometer choice experiments clarified that the fourth instar larvae of H. axyridis avoided the first instar conspecific larvae, while those of H. yedoensis were attracted to the odours from H. axyridis and conspecifics. Thus, H. axyridis has an avoidance mechanism only for cannibalism but not for IGP, whereas H. yedoensis does not have any avoidance mechanism. These different behaviours in the direct and indirect effects of cannibalism and IGP observed in the laboratory may play important roles in the coexistence of generalist–common H. axyridis and specialist–rare H. yedoensis in natural conditions, compensating for the large handicap of H. yedoensis at reproductive interference from H. axyridis.</p>
Data from: Tradeoffs affect the adaptive value of plasticity: Stronger cannibal-induced defenses incur greater costs in toad larvae
<p>Adaptive developmental plasticity allows individuals to match their phenotype with their environment, which can increase fitness where threats are inconsistently present. Because adaptive traits are not ubiquitously nor infinitely plastic, tradeoffs between benefits and costs or limits are theoretically necessary to constrain plastic responses. Systems in which extreme risk can be reliably detected are ideal for investigating mechanisms that constrain plasticity, as even costly responses may be adaptive where risk is severe. Cane toads (<em>Rhinella marina</em>) are abundant in Australia and produce large clutches (frequently >10,000 eggs), but asynchronous breeding and rapid development result in variable larval densities within breeding pools. In the field, we found that cannibalism by older cohorts often reduces the survival of conspecific eggs and newly hatched pre-feeding larvae ("hatchlings") by >99%, as feeding larvae ("tadpoles") use chemical cues from the relatively immobile hatchlings to locate and consume them. After hatchlings become free-swimming, however, they are safe from cannibalism. Hatchlings can reduce this period of vulnerability by accelerating development when they detect conspecific tadpole cues. However, this developmental acceleration decreases initial tadpole mass, reduces subsequent survival, growth, and development, affects behavior, and compromises feeding structures. Reaction norms differ among clutches, and greater developmental acceleration is followed by greater impairment of larval function in plastic clutches, whereas nonresponsive clutches are unaffected by exposure to cannibal cues. More plastic clutches ultimately exhibit both poorer performance and greater variation among siblings in exposed and (to a lesser degree) control treatments. Variation among clutches in tadpole viability is driven by differences in plasticity rather than phenotype; fitness reductions are linked to developmental acceleration, not rapid development <em>per se</em>. Clutches with intrinsically slow pre-feeding developmental rates exhibit stronger acceleration (i.e., steeper reaction norms), but clutches with intrinsically rapid development reach invulnerable stages more quickly than those that accelerate development. As a result, high cannibalism risk may favor canalized rapid development rather than facultative developmental acceleration. Cannibalism plays an important role in the recruitment of this invasive species, and hatchling defenses against this threat demonstrate how the limits and tradeoffs associated with an inducible defense can favor canalized defenses over phenotypic plasticity.</p>
Impacts of female body size on cannibalism and juvenile abundance in a dominant arctic spider
<p>1. Body size influences an individual's physiology and the nature of its intra- and interspecific interactions. Changes in this key functional trait can therefore have important implications for populations as well. For example, among invertebrates, there is typically a positive correlation between female body size and reproductive output. Increasing body size can consequently trigger changes in population density, population structure (e.g., adult to juvenile ratio), and the strength of intraspecific competition.</p> <p>2. Body size changes have been documented in several species in the Arctic, a region that is warming rapidly. In particular, wolf spiders, one of the most abundant arctic invertebrate predators, are becoming larger and therefore more fecund. Whether these changes are affecting their populations and role within food webs is currently unclear.</p> <p>3. We investigated the population structure and feeding ecology of the dominant wolf spider species (Pardosa lapponica) at two tundra sites where adult spiders naturally differ in mean body size. Additionally, we performed a mesocosm experiment to investigate how variation in wolf spider density, which is likely to change as a function of body size, influences feeding ecology and its sensitivity to warming.</p> <p>4. We found that juvenile abundance is negatively associated with female size and that wolf spiders occupied higher trophic positions where adult females were larger. Because female body size is positively related to fecundity in P. lapponica, the unexpected finding of fewer juveniles with larger females suggests an increase in density-dependent cannibalism as a result of increased intraspecific competition for resources. Higher rates of density-dependent cannibalism are further supported by the results from our mesocosm experiment, in which individuals occupied higher trophic positions in plots with higher wolf spider densities. We observed no changes in wolf spider feeding ecology in association with short-term experimental warming.</p> <p>5. Our results suggest that body size variation in wolf spiders is associated with variation in intraspecific competition, feeding ecology, and population structure. Given the widespread distribution of wolf spiders in arctic ecosystems, body size shifts in these predators as a result of climate change could have implications for lower trophic levels and for ecosystem functioning. </p>
Fig. 5 in Comparative Biology Of Cave-Dwelling Spitting Spiders (Araneae: Scytodidae): Parental Care, Cooperative Prey-Capture, Cannibalism, Natal Dispersal And Reproductive Behaviour
Fig. 5. Scytodes fusca female leaving her egg-sac aside to forage on the house fly.
Cannibal- Halloween lowpoly
The cannibalist on halloween festival 2021. Without rig animation. Use UV map with only 1 texture and lowpoly. Source: Objaverse 1.0 / Sketchfab
Experimental evolution of a more restrained clutch size when filial cannibalism is prevented in burying beetles Nicrophorus vespilloides
<p>The over-production of offspring is commonly associated with high hatching failure and a mechanism for dispensing with surplus young. We used experimental evolution of burying beetle populations Nicrophorus vespilloides to determine causality in these correlations. We asked: does eliminating the mechanism for killing 'spare' offspring cause the evolution of a more restrained clutch size, and consequently select for reduced hatching failure? N. vespilloides typically over-produces eggs but kills 1st instar larvae through partial filial cannibalism during brood care. We established replicate evolving populations that either could practice filial cannibalism (Full Care) or could not, by removing parents before their young hatched (No Care). After 20+ generations of experimental evolution, we measured clutch size and hatching success. We found that No Care females produced fewer eggs than Full Care females when allowed to breed on a small corpse, a finding not explained by differences in female quality. On larger corpses, females from both populations laid similar numbers of eggs. Furthermore, hatching success was greater in the No Care populations on small corpses. Our results suggest that the adaptive over-production of offspring depends on a mechanism for eliminating surplus young and that killing offspring, in turn, relaxes selection against hatching failure.</p>
Figure 2 in Brood cannibalism by Brettus cingulatus (Araneae: Salticidae: Spartaeini)
Figure 2 (continued from previous page). Selected sequential frames from a 23.98 fps video of a male approaching the nesting Brettus cingulatus to mate (5 June 2022, 11:15 IST). 13-15, The male continued to approach the female and to touch her with extended legs I. 16-24, After mounting the female, the male attempted to get her to rotate or raise her abdomen in preparation for mating on the left side.
Figure 1 in Brood cannibalism by Brettus cingulatus (Araneae: Salticidae: Spartaeini)
Figure 1 (continued on next page). Sequential photographs taken at a Brettus cingulatus nest site. 1-4, Mating pair on the nest of a brooding female. The inflated tegulum (or bulb) of the left pedipalp of the male can be seen clearly. The eggs were recently deposited.
Figure 2 in Brood cannibalism by Brettus cingulatus (Araneae: Salticidae: Spartaeini)
Figure 2 (continued on next page). Selected sequential frames from a 23.98 fps video of a male approaching the nesting Brettus cingulatus to mate (5 June 2022, 11:15 IST). 1-3, The alert female guarding her brood. 4, Female turning to face the courting male. 5-9, Female in elevated position with extended legs I, turning to face the male. Note the separation and movement of the bright white pedipalps of this female. 10- 12, Male approaching female with outstretched legs I and separated pedipalps.
Figure 1 in Brood cannibalism by Brettus cingulatus (Araneae: Salticidae: Spartaeini)
Figure 1 (continued from previous page). Sequential photographs taken at a Brettus cingulatus nest site. 28-31, Second female feeding on a series of defenseless instar I spiderlings.
Figure 3. Consecutive frames from a 23.98 fps video showing a in Brood cannibalism by Brettus cingulatus (Araneae: Salticidae: Spartaeini)
Figure 3. Consecutive frames from a 23.98 fps video showing a female Brettus cingulatus capturing an instar I spiderling in the unattended brood (16 June 2022, 08:00 IST). 1-6, Approaching the intended victim. 7-8, Jump to capture the spiderling. 9-24, Slowly moving to the rear to feed on the captured spiderling.
TABLE 1 in First evidence of cannibalism in Crassimurex (s. s.) calcitrapa (Lamarck, 1803) (Gastropoda, Muricidae) from the Lutetian of the Paris Basin (France)
<p>TABLE 1. — Characteristics of the specimens of <i>C.</i> (<i>s. s.</i>) <i>calcitrapa</i> (Lamarck, 1803) bearing drill holes. The star (<b>*</b>) indicates the specimens bearing two drill holes.</p><table><thead><tr><th>Specimens number</th><th>Specimen lenght mm</th><th>Number of teleoconch whorls</th><th>Drilled whorl</th><th>Diameter of hole (in mm)</th><th>Complete or not</th><th>Location of the hole</th><th>Comment on the location of the holes</th></tr></thead><tbody><tr><th>MNHN.F.A91214</th><td>19.38</td><td>5 incomplete</td><td>Fifth</td><td>1.20</td><td>No</td><td>Abapertural side</td><td>On the shoulder, near the suture</td></tr><tr><th>MNHN.F.A91213</th><td>18.47</td><td>5 incomplete</td><td>Fifth</td><td>1.05</td><td>No</td><td>Apertural side</td><td>On the varix</td></tr><tr><th>MNHN.F.A91212</th><td>12.87*</td><td>4 incomplete</td><td>Third</td><td>0.8</td><td>Yes</td><td>Abapertural side</td><td>In an intervarice</td></tr><tr><th>MNHN.F.A91212</th><td>12.87*</td><td>4 incomplete</td><td>Fourth</td><td>0.6</td><td>No</td><td>Abapertural side</td><td>On the shoulder, in an intervarice</td></tr><tr><th>MNHN.F.A91211</th><td>10.69*</td><td>4 incomplete</td><td>Fourth</td><td>0.95</td><td>Yes</td><td>Abapertural side</td><td>On the shoulder, in an intervarice</td></tr><tr><th>MNHN.F.A91211</th><td>10.69*</td><td>4 incomplete</td><td>Third</td><td>1.00</td><td>No</td><td>Adapertural side</td><td>On the top of the whorl, in an intervarice</td></tr><tr><th>MNHN.F.A91210</th><td>7.06</td><td>3 incomplete</td><td>1-2th (suture)</td><td>1.20</td><td>Yes</td><td>Adapertural side</td><td>On the suture, in an intervarice, single hole with two opening</td></tr><tr><th>MNHN.F.A91209</th><td>4.45*</td><td>5</td><td>Fourth</td><td>0.4</td><td>Yes</td><td>Abapertural side</td><td>On the top of the whorl, in an intervarice</td></tr><tr><th>MNHN.F.A91209</th><td>4.45*</td><td>5</td><td>Third</td><td>0.25</td><td>Yes</td><td>Abapertural side</td><td>On the suture, in an intervarice</td></tr><tr><th>MNHN.F.A91208</th><td>4.37</td><td>3.5</td><td>1.5th</td><td>0.10</td><td>Yes</td><td>Abapertural side</td><td>On the shoulder, in an intervarice</td></tr><tr><th>MNHN.F.A91207</th><td>3.15</td><td>3.5</td><td>Third</td><td>0.35</td><td>Yes</td><td>Abapertural side</td><td>On the top of the whorl, in an intervarice</td></tr><tr><th>MNHN.F.A91206</th><td>3.43</td><td>3</td><td>2-3th (suture)</td><td>0.10</td><td>Yes</td><td>Abapertural side</td><td>Near the shoulder, in an intervarice, single hole with two openings</td></tr><tr><th>MNHN.F.A91205</th><td>3.30</td><td>3.25</td><td>Third</td><td>0.50</td><td>Yes</td><td>Abapertural side</td><td>On the centre of the whorl, in an intervarice</td></tr><tr><th>MNHN.F.A91204</th><td>3.95</td><td>1.5</td><td>Second</td><td>0.85</td><td>Yes</td><td>Abapertural side</td><td>On the top of the whorl, in an intervarice, large hole</td></tr><tr><th>MNHN.F.A91203</th><td>3.25</td><td>2.5</td><td>Beginning of the first</td><td>0.60</td><td>Yes</td><td>Adapertural side</td><td>On the centre of the whorl, in an intervarice</td></tr><tr><th>MNHN.F.A91202</th><td>3.10</td><td>2.5</td><td>Protoconch/ first (suture)</td><td>0.70</td><td>Yes</td><td>Abapertural side</td><td>In an intervarice, single hole with two openings</td></tr><tr><th>MNHN.F.A91201</th><td>2.50</td><td>1.5</td><td>First</td><td>0.40</td><td>Yes</td><td>Apertural side</td><td>In an intervarice</td></tr></tbody></table>
Data and codes for "Habitat structural complexity increases age-class coexistence and population growth rate through relaxed cannibalism in medaka fish"
<p>The zip file contains readme files, as well as data and codes to reproduce results and figures from the paper.</p>
Data for: Linking behavioural type with cannibalism in Eurasian perch
<p>Behavioural data and prey selection data</p> <p>V3 includes corrected Fulton's K and date of behavioural trials </p>
Relatedness modulates density-dependent cannibalism rates in Drosophila
<p>1. Cannibalism is taxonomically widespread, and can have large impacts on individual fitness and population-level processes. As such, identifying how cannibalism rates vary in response to ecological cues is important for predicting species evolution and population dynamics.</p> <p>2. In this study, we aimed to identify several eco-evolutionary factors that affect cannibalism rate and measure how they interacted with one another.</p> <p>3. To do this, we conducted two experiments using complimentary methods to measure how cannibalism rates varied among larval Drosophila melanogaster and Drosophila simulans in response to changes in conspecific relatedness, social familiarity and density.</p> <p>4. We found that larvae were more likely to cannibalise non-related larval victims in both species, and that this effect increased at high densities in D. simulans. We found no evidence that Drosophila larvae use social familiarity to assess relatedness. Finally, in D. melanogaster, cannibalistic larvae prefer to cannibalise larvae that are being attacked by a greater number of conspecifics, implying that cues linked to conspecific abundance encourage cooperative cannibalism.</p> <p>5. By showing that cannibalism frequency in Drosophila spp. is sensitive to relatedness and several other factors, we reveal the complex relationship between cannibalism frequency and species ecology. Also, by showing that the effect of relatedness on cannibalism frequency is density-dependent, we advance the current understanding of how ecological variables interact to affect kin selection.</p> <p>ANALYSIS CODE IS WRITTEN IN R.</p>
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.