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Fig. 4. A–E in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 4. A–E. SEM micrographs of isoetalean masses from Isoetites sp. (MPZ 2010/919) from the uppermost Albian of northeastern Spain. In situ microspores showing distal face (A), distal face with characteristic tuberculate ornamentation (B), and proximal face with the laesura extending the whole length of the grain and psilate ornamentation (C–E). F, G. Dispersed isoetalean microspores of the genus Peromonolites from Estercuel deposits similar to herein described in situ ones.
Fig. 3 in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 3. In situ masses of microspores of isoetalean microsporophyll (MPZ 2010/919) from Estercuel locality, latest Albian. A. Detail of the microsporangium with six masses of microspores, some of them showing a false "trilete" mark (arrows) probably due to a post-sedimentary compression process. B, D. Masses of hundreds of microspores, the false "trilete" mark due to compaction within adjacent polygonal bodies inside microsporophyll (arrow). C. Detail of microspores presumably grouped in tetrads (arrows) showing both proximal and distal faces. B–D, SEM micrographs. Scale bars: A, 5 mm; B, D, 100 μm; C, 20 μm.
Fig. 2 in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores
Fig. 2. Isoetalean microsporophyll with in situ masses of microspores, from the Boundary Marls unit (uppermost Albian) of Estercuel (Teruel, Spain). A. Explanatory drawing of the microsporophyll in B. Black arrows and the irregular lines indicate the impressions of trabeculae in leaf section. B. MPZ 2010/919. Microsporophyll with the sporangium at base containing masses of microspores (B 1). Detail of the microsporophyll lamina with impressions of trabeculae indicated by white arrows (B 2). Detail of the base of the microsporophyll leaf showing the impression of ligule (B 3). Microsporangium containing masses of microspores (B ). Scale bars: A, B , B , 5 mm; B , B , 1 mm.
Fig. 1 in "Migratory beekeeping and its influence on the prevalence and dispersal of pathogens to managed and wild bees"
Fig. 1. Flow chart of the process of the systematic review on the different impacts of migratory beekeeping (MB), including the number of studies analysed at each step of the review process. Detailed data in Supplementary Table 1.
Fig. 2 in "Migratory beekeeping and its influence on the prevalence and dispersal of pathogens to managed and wild bees"
Fig. 2. Cumulative number of publications examining in general the impact of migratory beekeeping (blue dots) and in particular the prevalence of pathogens (orange dots) from 1990 to 2022. Exponential trend lines are represented by dashed lines. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
FIGURE 7 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 7 | Correlation between total length and number of rays with hooks in males of Brycon orbignyanus. X axis: total length in cm. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 4 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 4 | Anal fin of Brycon orbignyanus with hooks. b: base of the hook. fr: first ray. lr: last ray. s: hooks. sg: rays segment. sr: second ray. st: hook cusp. Scales: A and B. 1.0 cm; C and D. 200 µm; E. 100 µm.
FIGURE 5 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 5 | Phases of testes maturation in Brycon orbignyanus. A. Immature. B. Immature intersex. C. Regressing. D. Regenerating. E. Spawning Capable (primary male). F. Spawning Capable (secondary male). bv: blood vessels. cy: germ cell cysts. dge: discontinuous germinal epithelium. in: interstice. pg: primary growing oocyte. sg: spermatogonia. s: Sertoli cell. sz: sperm. tw: testis wall. va: vacuoles. Scales: A, C, D, E. 20 µm; B, F. 50 µm. Staining: Hematoxylin and Eosin.
FIGURE 3 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 3 | Anal fin of Brycon orbignyanus without hooks. ca: callosity. fb: first fork. fr: first ray. sg: rays segment. sr: second ray. tb: terminal bifurcation. Scales: A. 0.5 cm; B. 200 µm; C. 100 µm.
FIGURE 6 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 6 | Correlation between stages of the reproductive cycle and the number of rays with hooks in males of Brycon orbignyanus. X axis: Stages of the reproductive cycle, being, 0 – Immature specimens, 1 – Regressing, 2 – Regenerating specimens, 3 – Developing specimens, 4 – Spawning Capable specimens. Y axis: number (n°) of anal fin rays that developed hooks.
FIGURE 1 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 1 | Anal fins in Brycon orbignyanus. A. Specimen of B. orbignyanus. B. Anal fin regions. C. Rays (r). D. Anal fin rays. af: anal fin. bi: bifurcation of rays. ca: caudal region. cr: cranial region. fr: first ray. im: interradial membrane. me: medial region. sg: radius segment. Scales: A. 5 cm; B and D. 1 cm; C. 200 µm.
FIGURE 2 in Dispersion of hooks on the anal fins of primary and secondary males in Brycon orbignyanus (Characiformes: Bryconidae): a secondary sexual trait for breeder selection
FIGURE 2 | Details regarding the fins of Brycon orbignyanus. A, C and E. Rays without hooks. B, D and F. Rays with hooks. b: base. fb: first fork. r: rays. rs: rays with hooks. s: hooks. sg: rays segment. st: hooks cusp. tb: terminal bifurcation. Scales: A and B. 1 cm; C and D. 200 µm; E. 100 µm; F. 50 µm.
Dispersion curves for average and individual cratons used in Davison et al, 2024
<p>A collection of surface-wave dispersion curves, Rayleigh and Love, used for modelling cratonic regions in Davison et al, 2024. These regions are:</p> <p> </p> <p>-A global average across all cratons, as described in Civiero et al. (2024);</p> <p>-Interstation measurements for the Baltic, Guyana, Congo and Western Australian cratons, as described in Lebedev et al. (2009);</p> <p>-Regional measurements for the Southwest Kaapvaal, Central Kaapvaal, Northern Kaapvaal and Limpopo Belt, as described in Ravenna et al. (2018).</p>
Figure 7. Energy dispersive X in Morphological updates and molecular description of Heterosentis holospinus Amin, Heckmann, & Ha, 2011 (Acanthocephala, Arhythmacanthidae) in the Pacific Ocean off Vietnam
Figure 7. Energy dispersive X-ray spectrum of the basal arch of a Gallium cut hook of a Heterosentis holospinus specimen showing high levels of calcium and phosphorus similar to those of the hook base (Table 2). The X-ray data are the elemental analysis of the hook arch (see bolded figures in Table 2). Insert: SEM of a longitudinal Gallium cut hook.
Linked collectors and determiners for: Systematics of the enigmatic South American Streblopus Van Lansberge, 1874 dung beetles and their transatlantic origin: a case study on the role of dispersal events in the biogeographical history of the Scarabaeinae (Coleoptera: Scarabaeidae).
Natural history specimen data linked to collectors and determiners held within, "Systematics of the enigmatic South American Streblopus Van Lansberge, 1874 dung beetles and their transatlantic origin: a case study on the role of dispersal events in the biogeographical history of the Scarabaeinae (Coleoptera: Scarabaeidae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/1668be17-f285-47ef-98b6-c9d90b8cbd6e">https://bionomia.net/dataset/1668be17-f285-47ef-98b6-c9d90b8cbd6e</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/1668be17-f285-47ef-98b6-c9d90b8cbd6e">https://gbif.org/dataset/1668be17-f285-47ef-98b6-c9d90b8cbd6e</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: Morphological and molecular data reveal the cryptic diversity among populations of Aegla paulensis (Decapoda, Anomura, Aeglidae), with descriptions of four new species and comments on dispersal routes and conservation status.
Natural history specimen data linked to collectors and determiners held within, "Morphological and molecular data reveal the cryptic diversity among populations of Aegla paulensis (Decapoda, Anomura, Aeglidae), with descriptions of four new species and comments on dispersal routes and conservation status". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/53780a8e-66fa-4263-8542-ff9c540ab37d">https://bionomia.net/dataset/53780a8e-66fa-4263-8542-ff9c540ab37d</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/53780a8e-66fa-4263-8542-ff9c540ab37d">https://gbif.org/dataset/53780a8e-66fa-4263-8542-ff9c540ab37d</a>. Formatted as a Frictionless Data package.
Linked collectors and determiners for: The montane trees of the Cameroon Highlands, West-Central Africa, with Deinbollia onanae sp. nov. (Sapindaceae), a new primate-dispersed, Endangered species.
Natural history specimen data linked to collectors and determiners held within, "The montane trees of the Cameroon Highlands, West-Central Africa, with Deinbollia onanae sp. nov. (Sapindaceae), a new primate-dispersed, Endangered species". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe">https://bionomia.net/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe">https://gbif.org/dataset/ceb40045-70f8-4933-91a1-a696aea66ebe</a>. Formatted as a Frictionless Data package.
Data from: Dispersal in a house sparrow metapopulation: an integrative case study of genetic assignment calibrated with ecological data and pedigree information
<p class="western">Dispersal has a crucial role determining eco-evolutionary dynamics through both gene flow and population size regulation. However, to study dispersal and its consequences, one must distinguish immigrants from residents. Dispersers can be identified using telemetry, capture-mark-recapture (CMR) methods, or genetic assignment methods. All of these methods have disadvantages, such as, high costs and substantial field efforts needed for telemetry and CMR surveys, and adequate genetic distance required in genetic assignment. In this study, we used genome-wide 200K Single Nucleotide Polymorphism data and two different genetic assignment approaches (GSI_SIM, Bayesian framework; BONE, network-based estimation) to identify the dispersers in a house sparrow (<i>Passer domesticus</i>) metapopulation sampled over 16 years. Our results showed higher assignment accuracy with BONE. Hence, we proceeded to diagnose potential sources of errors in the assignment results from the BONE method due to variation in levels of inter-population genetic differentiation, intra-population genetic variation and sample size. We show that assignment accuracy is high even at low levels of genetic differentiation and that it increases with the proportion of a population that has been sampled. Finally, we highlight that dispersal studies integrating both ecological and genetic data provide robust assessments of the dispersal patterns in natural populations.</p>
Supplementary material to "Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba)"
<p><strong>Abstract</strong></p> <p>Natal dispersal affects many processes such as population dynamics. So far, most studies have examined the intrinsic and extrinsic factors that determine the distance between the place of birth and of first breeding. In contrast, few researchers followed the first steps of dispersal soon after fledging. To study this gap, we radio-tracked 95 barn owl nestlings (<em>Tyto alba</em>) to locate their diurnal roost sites from the fledging stage until December. This was used to test whether the age of nest departure, post-fledging movements and dispersal distance were related to melanin-based coloration, which is correlated to fitness-related traits, as well as to corticosterone, a hormone that mediates a number of life history trade-offs and the physiological and behavioural responses to stressful situations. We found that the artificial administration of corticosterone delayed the age when juveniles left their parental home-range in females but not in males. During the first few months after fledging, longer dispersal distances were reached by females compared to males, by individuals marked with larger black feather spots compared to individuals with smaller spots, by larger individuals and by those experimentally treated with corticosterone. We conclude that the onset and magnitude of dispersal is sensitive to the stress hormone corticosterone, melanin-based coloration and body size. </p>
Figure 3 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 3. Percentages of survival of two cohorts of seedlings of Protium tovarense monitored during 9 and 14 years.
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