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37 results for “Tree breeding”
Figure 1 in Breeding behaviour of the Omei tree frog Rhacophorus omeimontis (Anura: Rachophoridae) in a subtropical montane region
Figure 1. Pictures of breeding Rhacophorus omeimontis. (a) Group spawning in tree leaves at Pond A; (b) leaf nest at Pond A; (c) group spawning at Pond B; and (d) spawning site at Pond B.
Figure 4 in Breeding behaviour of the Omei tree frog Rhacophorus omeimontis (Anura: Rachophoridae) in a subtropical montane region
Figure 4. Relationship between number of joining males and percentage clutch fertilization of Rhacophorus omeimontis at Pond A.
Figure 3 in Breeding behaviour of the Omei tree frog Rhacophorus omeimontis (Anura: Rachophoridae) in a subtropical montane region
Figure 3. Relationship between mean egg size and clutch size of Rhacophorus omeimontis in Pond A (broken line) and Pond B (solid line).
Figure 2 in Breeding behaviour of the Omei tree frog Rhacophorus omeimontis (Anura: Rachophoridae) in a subtropical montane region
Figure 2. Analysis of Rhacophorus omeimontis vegetation-use at Pond B. Relative occurrence at the pond perimeter of different vegetation types (black bars) and percentage of plant species used by R. omeimontis to construct foam nests (white bars). Plant species used for the construction of foam nests were: (a) Rhizoma dryoteris; (b) Parathelypteris glanduligera; (c) Artemisia princes; (d) Urtica cannabina; and (e) Plantago asiatica.
FIGURE 7. Maximum likelihood tree for all 28 in Mud-packing frog: A novel breeding behaviour and parental care in a stream dwelling new species of Nyctibatrachus (Amphibia, Anura, Nyctibatrachidae)
FIGURE 7. Maximum likelihood tree for all 28 nominal species of Nyctibatrachus and an outgroup (Indirana sp.) based on mitochondrial 16S rRNA. Number at the branches indicate bootstrap values. Bootstrap values less than 50 are indicated with an asterisk. Area marked with grey belong to N. sanctipalustris clade.
Nonideal nest box selection by tree swallows breeding in farmlands: evidence for an ecological trap?
<p>Animals are expected to select a breeding habitat using cues that should reflect, directly or not, the fitness outcome of the different habitat options. However, human-induced environmental changes can alter the relationships between habitat characteristics and their fitness consequences, leading to maladaptive habitat choices. The most severe case of such nonideal habitat selection is the ecological trap, which occurs when individuals prefer to settle in poor-quality habitats while better ones are available. Here we studied the adaptiveness of nest box selection in a tree swallow (<i>Tachycineta bicolor</i>) population breeding over a 10-year period in a network of 400 nest boxes distributed along a gradient of agricultural intensification in southern Québec, Canada. We first examined the effects of multiple environmental and social habitat characteristics on nest box preference to identify potential settlement cues. We then assessed the links between those cues and habitat quality as defined by the reproductive performance of individuals that settled early or late in nest boxes. We found that tree swallows preferred nesting in open habitats with high cover of perennial forage crops, high spring insect biomass, and high density of house sparrows (<i>Passer domesticus</i>), their main competitors for nest sites. They also preferred nesting where the density of breeders and their mean number of fledglings during the previous year were high. However, we detected mismatches between preference and habitat quality for several environmental variables. The density of competitors and conspecific social information showed severe mismatches, as their relationships to preference and breeding success went in opposite direction under certain circumstances. Spring food availability and agricultural landscape context, while related to preferences, were not related to breeding success. Overall, our study emphasizes the complexity of habitat selection behavior and provides evidence that multiple mechanisms may potentially lead to an ecological trap in farmlands. </p>
Figure 4. a in One tree, many colonies: colony structure, breeding system and colonization events of host trees in tunnelling Melissotarsus ants
Figure 4. a, number of matings per queen for each monogyne colony in each population. b, relatedness values among nestmate workers for each colony. Arrows indicate relatedness values between alate queens (rA-A) and the triangle indicates relatedness value between queens in the SL11 polygyne colony.
Figure 3 in One tree, many colonies: colony structure, breeding system and colonization events of host trees in tunnelling Melissotarsus ants
Figure 3. Clustering of nests in the overall sampling using principal component analysis of the microsatellite markers. Clustering analyses were subsequently run for each of the four populations of nests.
Figure 1 in One tree, many colonies: colony structure, breeding system and colonization events of host trees in tunnelling Melissotarsus ants
Figure 1. Geographic positions of the 34 nests of Melissotarsus sampled in four localities in South Africa, and one pooled sample from Mozambique. Insets indicate sampling positions of nests within the localities of uMkhuze (left) and St Lucia (right). Nests located on the same branch or tree are indicated with the same label.
Figure 2 in One tree, many colonies: colony structure, breeding system and colonization events of host trees in tunnelling Melissotarsus ants
Figure 2. Graphical representation of STRUCTURE results determining the number of genetic groups in the overall dataset for different values of K. Each genetic group is characterized by a colour; and each individual is represented by a vertical bar according to its probability of belonging to each group. Distinct simulations were subsequently run for the four populations, separately. In each population, grey bars below the plot indicate different colonies assigned to a single genetic group by STRUCTURE (only the pairs EC1/2 and CEc/ma are not significant using the G-test of differentiation).
Rainfall and nest site competition delay Mountain Bluebird and Tree Swallow breeding but do not impact productivity
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Nonideal nest box selection by tree swallows breeding in farmlands: evidence for an ecological trap?
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Data from: Tree species composition, breeding systems, pollination and dispersal syndromes in three forest successional stages in a tropical dry forest in Mesoamerica
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Data from: Multidimensional environmental influences on timing of breeding in a tree swallow population facing climate change
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Data from: Anthropogenic and natural drivers of gene flow in a temperate wild fruit tree: a basis for conservation and breeding programs in apples
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Figure 5 in One tree, many colonies: colony structure, breeding system and colonization events of host trees in tunnelling Melissotarsus ants
Figure 5. Dealate queens of Melissotarsus ants with different degrees of physogastry.
Pollination biology and breeding system analysis of Ulmus wallichiana Planchon (Ulmaceae): a rare and threatened tree species of Central and Western Himalaya
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International Brain Laboratory public data
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OpenNeuro
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