Results 61 to 70 of about 1,468 (192)
Phenology, Mating Behaviour, and Ecology of a Wild New Zealand Nurseryweb Spider (Dolomedes minor)
New Zealand Journal of Zoology, Volume 53, Issue 3, September 2026.Population dynamics are key to the understanding of mating systems, and in particular, sex ratios provide an insight into the evolutionary pressures governing a mating system. Variation in sex ratios can influence mate competition, parental investment strategies, and ultimately shape mating rates and the reproductive success of individuals within a ...
Simon J. Connolly, Christina J. Painting
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Rivista Italiana di Ornitologia - Research in OrnithologyHere I present the results of a 3-year field study on some aspects of spring migration in a partially sedentary population of the stonechat Saxicola rubicola in central Italy.
Steven Hueting
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A note on the flowers of Halleria lucida
Bothalia: African Biodiversity & Conservation, 1977 Studies of sunbirds (Cinnyris spp.) feeding on the nectar of flowers of Halleria lucida L. suggest that partial protandry may be operative in the breeding system of this cauliflorous tree.
C. H. Stirton
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Nitrogen limitation and life history adaptation in the grasshopper "Omocestus viridulus" [PDF]
, 2005 The role of plant-mediated constraints to herbivore populations in terrestrial ecosystems remains relatively poorly understood. One aim of this study was therefore to explore the effects of low host plant nitrogen (N) content on herbivore performance and
Berner, Daniel
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Austral Ecology, Volume 51, Issue 9, September 2026.ABSTRACT The breeding systems of Lutruwita/Tasmania's threatened Epacris taxa are poorly known. Our main objective was to determine the pollinators of several endemic species and explore for relationships between pollinators, floral morphology, flowering time and habitat. The Epacris have limited variation in floral traits and exhibit generalist floral
Karen A. Johnson, Peter B. McQuillan
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Journal of Fisheries, 2020 Anemonefishes are some of the most popular marine ornamental fishes. Due to the adverse impacts of commercial fishing on the wild populations of anemonefishes, a more suitable and efficient captive breeding programme must be promoted.
Eri Iwata +4 more
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Adaptive Versus Incidental Explanations for the Occurrence of Protandry in Butterfly, Leptidea sinapis L. [PDF]
Evolution, 1982 In many butterflies males emerge before females (Petersen, 1892; Demoll, 1908; Berge and Rebel, 1910; Ford, 1945; Petersen, 1947; Forster, 1954; Newman, 1968). This phenomenon, here referred to as protandry, is also known from other insects (Petersen, 1892; Demoll, 1908; Petersen, 1947).
Christer, Wiklund, Christer, Solbreck
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Mutualism and Antagonism in a Post‐Extinction Hawaiian Bird–Lobelioid Pollination System
Ecology and Evolution, Volume 16, Issue 8, August 2026.Species loss can restructure plant–pollinator interactions, but the functional consequences of altered interactions remain unclear. Using camera observations and experimental manipulations in Hawaiian lobelioids, we show that nectarivorous birds differ in whether visits result in pollen contact or nectar robbing, with robbing altering nectar dynamics ...
Samuel B. Case +9 more
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Sex is also a matter of timing : an overview and an update of protandry studies in birds
, 2009 Earlier emergence or arrival of either sex at the breeding grounds is common in animals. Since the widespread occurrence of differences in the timing of appearance of males and females at the breeding grounds has been appreciated decades ago, diverse ...
N. Saino
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The Significance of Protandry in Social Hymenoptera
The American Naturalist, 1983 An optimization model is constructed for an annual eusocial wasp or bee which may at any time produce workers and/or male and female reproductives. The optimal policy is to produce only workers at first, and at some critical time switch to producing only reproductives, confirming the conclusion of Macevicz and Oster (1976).
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