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8 results for “penduline tits”
Fig. 1 in The Influence Of Nest Size On Heat Loss Of Penduline Tit Eggs
Fig. 1. Changes in internal egg temperatures (mean °C) during trials with Penduline Tit nests (treatments: ambient temperature – clutch size)
Fig. 2 in The Influence Of Nest Size On Heat Loss Of Penduline Tit Eggs
Fig. 2. Effects of nest thickness on terminal temperatures in relation to ambient temperature and clutch size. Each symbol represents one nest (N= 20 nests, all nests were measured in all treatments). We used least-squares regression to estimate the best fit to each pair of treatments separately (regression equations, 25°C & 9 eggs: terminal temperature = 27.64 + 0.05 × nest thickness; 25°C & 3 eggs: terminal temperature = 27.56 + 0.01 × nest thickness; 10°C & 9 eggs: terminal temperature = 16.29 + 0.19 × nest thickness; 10°C & 3 eggs: terminal temperature = 15.66 + 0.08 × nest thickness)
Fig. 1. Residentmalependulinetitsreacttoplaybacksongandadummypendulinetit aroundtheirnest. Behaviouralresponsesincludedattacking, i.e in Acoustic Signalling In Eurasian Penduline Tits Remiz Pendulinus: Repertoire Size Signals Male Nest Defence
Fig. 1. Residentmalependulinetitsreacttoplaybacksongandadummypendulinetit aroundtheirnest. Behaviouralresponsesincludedattacking, i.e. peckingatthedummy, as
Fig. 2 in Acoustic Signalling In Eurasian Penduline Tits Remiz Pendulinus: Repertoire Size Signals Male Nest Defence
Fig. 2. SonogramsofsometypicalsyllabletypesofEurasianpendulinetits. Songbouts mayconsistofvarioussyllables (topandbottomsonograms) ormayincludemonotone
Fig. 3 in Acoustic Signalling In Eurasian Penduline Tits Remiz Pendulinus: Repertoire Size Signals Male Nest Defence
Fig. 3. Approachdistance (a) and % behaviouralresponses (b) towardsanintruderinre- lationtotheresidentmale'sownrepertoiresize. Behaviouralresponsesincludedcalling, singing, tailquiveringandattacking. Opencirclesindicateresponsesofchallengedresi- dentsonsmallrepertoireplayback, whereasfilledcirclesindicatethesamemales' respons- esonlargerepertoireplayback. Notethatpointsshownontheupperhalfregionof (a) represent males that were mostly present very close to their nest (15 m from the stimulus,
Fig. 1 in Male Signalling And Dominance In The Penduline Tit Remiz Pendulinus
Fig. 1. Schematic view of the apparatus used in dominance tests for male penduline tits. A female penduline tit was placed in the stimulus cage which was separated from the males by wire-mesh (dashed lines). In each trial two males were released in the arena. The arena was divided into six equal squares (three on the left side L1-L3 and three on the right side R1-R3) by pot reeds (rectangles). Trials were observed through a one-way window (W). Five distance categories were used to score the males' distances from stimulus female: M = mesh (0 cm), P = perch (12 cm), L1/R1 (45 cm), L2/R2 (135 cm), L3/R3 (225 cm). Dotted lines indicate wood sticks on the floor that assisted the allocation of distance categories. Food and water was provided during experimental trials in pots placed in the
Breeding biology of two populations of Chinese penduline tits
<p>The phenotypes and breeding behavior in one species may be different between populations. The local environments, social interactions can all lead to some variations in life history. The thorough investigations of breeding biology over populations can provide insights for us to understand the evolution and diversifications of breeding systems and phenotypic traits from multiple perspectives other than drawing monotonous associations between a factor and a trait. In this study, we explored two Chinese penduline populations, Liaohekou (LHK) and Xianghai (XH), both in the northeast of China located 550 km away from each other. A comparative study of the breeding biology was carried on in the two populations. We found that the climate has no obvious difference in these two populations but has different habitats. Nest emergence and egg-laying were earlier in the more northern population XH. Males in XH has a lower chance of pairing up with a female and exhibit mainly biparental care pattern instead uniparental care that we reported in LHK. The chick fledgling success in the biparental care nests was higher than in the uniparental care nests in XH, but no difference to the uniparental care nests in LHK. Besides, the penduline tits in the two populations were also significantly different in their wing length, tail length and beak shape. These incongruences suggested different food availability, adult sex ratio and migration distances of the two populations. Future studies should experimentally investigate the joint influences of breeding perspectives on the evolution of parental care and mating system.</p>
Breeding biology of two populations of Chinese penduline tits
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