Figure 3 in Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Figure 3. Breeding chronology (the number of amplectant pairs observed per day) of the frogs in relation to ambient temperature and rainfall during the 2007 breeding season.Published as part of Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao & Guo, Weibin, 2016, Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae), pp. 2769-2782 in Journal of Natural History 50 on page 2774, DOI: 10.1080/00222933.2016.1205155, http://zenodo.org/record/399460

Figure 4 in Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Figure 4. Plots of body size of males and females in amplexus found in early and late breeding season. SVL: snout-vent length.Published as part of Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao & Guo, Weibin, 2016, Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae), pp. 2769-2782 in Journal of Natural History 50 on page 2775, DOI: 10.1080/00222933.2016.1205155, http://zenodo.org/record/399460

Figure 5 in Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Figure 5. Relationship between clutch size and egg size.Published as part of <i>Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao & Guo, Weibin, 2016, Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae), pp. 2769-2782 in Journal of Natural History 50</i> on page 2777, DOI: 10.1080/00222933.2016.1205155, <a href="http://zenodo.org/record/3994601">http://zenodo.org/record/3994601</a&gt

Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao, Guo, Weibin (2016): Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae). Journal of Natural History 50: 2769-2782, DOI: 10.1080/00222933.2016.1205155, URL: http://dx.doi.org/10.1080/00222933.2016.120515

Figure 2 in Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Figure 2. Typical habitats used by the frogs, and spatial locations of the hibernation (closed circles) and spawning (open circles) ponds in the study plot (100 × 55 m). Sizes of the circles represent pond area.Published as part of Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao & Guo, Weibin, 2016, Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae), pp. 2769-2782 in Journal of Natural History 50 on page 2772, DOI: 10.1080/00222933.2016.1205155, http://zenodo.org/record/399460

Figure 1 in Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae)

Figure 1. Map showing the species distribution and study site.Published as part of Lu, Xin, Ma, Xiaoyan, Fan, Liqing, Hu, Yigang, Lang, Zedong, Li, Zhibin, Fang, Bohao & Guo, Weibin, 2016, Reproductive ecology of a Tibetan frog Nanorana parkeri (Anura: Ranidae), pp. 2769-2782 in Journal of Natural History 50 on page 2771, DOI: 10.1080/00222933.2016.1205155, http://zenodo.org/record/399460

Data from: How much do we know about the breeding biology of bird species in the world?

Knowledge on species’ breeding biology is the building blocks of avian life history theory. A review for the current status of the knowledge at a global scale is needed to highlight the priority for future research. We collected all available information on three critical nesting parameters (clutch size, incubation period and nestling period) for the close to 10 000 bird species in the world and identified taxonomic, geographic and habitat gaps in the distribution of knowledge on avian breeding biology. The results show that only one third of all extant species are well known regarding the three nesting parameters analyzed, while the rest are partly or poorly known. Most data deficient taxonomic groups are tropical forest nesters, particularly from the Amazon basin, southeast Asia, Equatorial Africa and Madagascar – the places that harbor the world's highest bird diversity. These knowledge gaps could be hampering our understanding of avian life histories. Ornithologists are encouraged to pay more efforts to explore the breeding biology of those poorly-known species

Anomalous polarization enhancement in a van der Waals ferroelectric material under pressure

Abstract CuInP2S6 with robust room-temperature ferroelectricity has recently attracted much attention due to the spatial instability of its Cu cations and the van der Waals (vdW) layered structure. Herein, we report a significant enhancement of its remanent polarization by more than 50% from 4.06 to 6.36 µC cm−2 under a small pressure between 0.26 to 1.40 GPa. Comprehensive analysis suggests that even though the hydrostatic pressure suppresses the crystal distortion, it initially forces Cu cations to largely occupy the interlayer sites, causing the spontaneous polarization to increase. Under intermediate pressure, the condensation of Cu cations to the ground state and the polarization increase due cell volume reduction compensate each other, resulting in a constant polarization. Under high pressure, the migration of Cu cations to the center of the S octahedron dominates the polarization decrease. These findings improve our understanding of this fascinating vdW ferroelectric material, and suggest new ways to improve its properties

The current status of the knowledge on avian breeding biology

Tables A1-3. The current status of the knowledge on avian breeding biology by different levels of taxonomy