Results 31 to 40 of about 1,468 (192)
Six Hypotheses of Protandry in Migratory Birds and Study Hotspots in the Future [PDF]
, 2011 Protandry refers the earlier arrival at breeding sites or reproductive stages of males than females. Focusing on the general phenomenon of males arriving at breeding sites earlier than females in migratory birds, we introduced six hypotheses for ...
Ma, Zhi-Jun, Hui, Xin
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Protandry and Self-Fertilization in the Calyptraeidae [PDF]
Nature, 1960 ORTON1 suggested that protandrous animals might be self-fertilizing and that this would be advantageous for the spread of a species. He concluded that Crepidula fornicata was self-fertilizing because he found an isolated female guarding veliger larvae. I have kept single Crepidula in aquaria and they have laid fertilized spawn two to three months later.
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European Journal of Entomology, 2017 Seasonal polyphenism in adults may be a season-specific adaptation of the adult stage and/or a by-product of adaptive plasticity of the juvenile stages. The swallowtail butterfly Papilio xuthus L.
Shinya KOMATA, Teiji SOTA
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Acta Agrobotanica, 2012 This 4-year study examined the flowering pattern, floral display, nectar and pollen production as well as insect visitation to a perennial Geranium platypetalum Fisch. and C. A. Mey. G. platypetalum bloomed from the end of May until the end of June.
Marzena Masierowska
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Proximate causes of avian protandry differ between subspecies with contrasting migration challenges
, 2016 In many migratory birds, males precede females during migration and arrival at the breeding sites. Three proximate mechanisms are proposed to explain this phenomenon of protandry: males 1) winter closer to breeding sites, 2) start spring migration ...
Liechti, Felix +18 more
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Morphology and anatomy of the flower and anthesis of Metrodorea nigra St. Hill. (Rutaceae)
Brazilian Archives of Biology and Technology, 2004 Studies on the morphology and anatomy of the flower and anthesis of Metrodorea nigra St. Hill. (Rutaceae) showed perfect flowers, which occurred in panicle. The peak of the flowering was August and September.
Luiz A. de Souza +3 more
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The functional significance of synchronous protandry in Alstroemeria aurea [PDF]
Functional Ecology, 2004 Summary Synchronous dichogamy, the simultaneous change in sex phases of all flowers in an inflorescence or entire plant, has been proposed to reduce self‐pollination between flowers within a plant (geitonogamy) and so should leave more pollen for export and/or reduce inbreeding.
HARDER, L. D., AIZEN, M. A.
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Plants, 2023 Opisthopappus is a perennial, endemic herb of the Taihang Mountains in China. Two species of this genus (O. longilobus and O. taihangensis) are important wild genetic resources for Asteraceae; however, their reproductive biology has been lacking until ...
Yiling Wang +6 more
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Phenotypic divergence may facilitate co-occurrence in Acanthopagrus species (Family: Sparidae). [PDF]
J Fish BiolAbstract Understanding why closely related species co‐occur is one fundamental question in ecology. The seabream genus Acanthopagrus Peters, 1855 (Sparidae) is broadly distributed across the Indo‐Pacific, with four species, A. arabicus and A. sheim (yellowfin group), and A. bifasciatus and A.
Lin YJ.
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Terrestrial gastropods - how do they reproduce? [PDF]
Invertebrate Survival Journal, 2017 Molluscs are the most diverse group in respect of sexual systems and strategies. They can be dioecious with separate sexes or hermaphroditic. Within hermaphroditism, it is possible to distinguish a number of modifications of this type of reproduction ...
KS Zając, PE Kramarz
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