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Important Cue (important + cue)
Selected AbstractsConspecifics and Their Posture Influence Site Choice and Oviposition in the Damselfly Argia moestaETHOLOGY, Issue 8 2009Catherine J. Byers Finding a suitable oviposition site can be costly because of energy and time requirements, and ovipositioning can be dangerous because of the risk of predation and harassment by males. The damselfly Argia moesta oviposits, contact-guarded by her mate, on vegetation in streams. Oviposition aggregations are commonly observed in this species, despite their territorial nature during other behaviors. We conducted experiments in the field to test the hypothesis that aggregations are the result of conspecific attraction. In the first experiment, two oviposition sites (sycamore leaves) were provided, one with models of ovipositing pairs, and one without. In the second experiment, one leaf again had ovipositing models, while the other had models of uncoupled males and females in a resting posture. In both experiments, damselfly pairs preferred the site with ovipositing models. In general, they visited the ovipositing models first more often than expected by chance, stayed longer there, were more likely to oviposit there, and laid a greater total number of eggs there. These results support the hypothesis that conspecific attraction is responsible for ovipositing aggregations in A. moesta and that posture is an important cue for attraction. Using conspecific cues could be a beneficial strategy to save in search costs while taking advantage of the presence of ovipositing conspecifics to dilute the effects of harassment and predation. [source] Reproductive phenology over a 10-year period in a lowland evergreen rain forest of central BorneoJOURNAL OF ECOLOGY, Issue 4 2007FRANCIS Q. BREARLEY Summary 1The aim of this study was to document patterns in tree reproductive phenology in a rain forest of central Borneo and examine relationships between phenology and climatic patterns. 2A 10-year data set (1990,2000) of monthly observations of flowering and fruit production of 171 trees (including 39 members of the Dipterocarpaceae) at Barito Ulu, Central Kalimantan, Indonesia, showed that most trees (73%) underwent reproductive activity on a supra-annual timescale. 3There were three general flowering (GF) events, in 1991, 1994 and 1997, which were preceded by major drought periods (30-day sliding total rainfall of less than 100 mm for more than 10 days) in which at least 40% of dipterocarps and at least 18% of all other trees underwent synchronized reproductive activity; there was also a minor event in 1990. Around 1.3% of trees flowered and 3.8% produced fruit in months outside of these four events. 4At the community level, the strongest negative correlation was found between the percentage of flowering individuals and total rainfall in the preceding 150 days. 5Within three genera of dipterocarps examined in more detail (Dipterocarpus, Shorea and Vatica) there were clear and consistent patterns of sequential flowering with certain species flowering early in the GF events and others towards the end of these events. 6Our results confirm the importance of large-scale climatic fluctuations (El Niņo-Southern Oscillation) on plant reproductive phenology in South-east Asian tropical forests and indicate that drought may be a more important cue than low night-time temperatures. [source] ,We Pray by His Mouth': Karl Barth, Erving Goffman, and a Theology of InvocationMODERN THEOLOGY, Issue 1 2001Matthew Boulton Rereading the opening question of the Westminster Catechism, "What is the chief end of man?", I contend in this essay that the act of invocation , giving God thanks, praise, and petitions , is the act in and through which human being itself is founded, constituted and achieved. I take important cues from Karl Barth's Church Dogmatics and The Christian Life, and from sociologist Erving Goffman's work on the shifting "footings" involved in everyday interactions. I argue for an account of the human being as a being-with-God, human acting as acting-with-God, and human salvation as a restoration to the genuine human partner's work , indeed, the true leitourgia, of thanks, praise and petition to God. [source] Building the house around the plumbing,BIOESSAYS, Issue 5 2002Brant Weinstein Signaling between growing blood vessels and the tissues that they innervate has traditionally been viewed as a one-way conversation, with organs and tissues supplying important cues for the growth and anatomical patterning of the blood vessels supplying them, but not vice-versa. Two recent papers1,2 now provide evidence that blood vessels can have an important role in promoting the assembly of organs and tissues. These papers show that proper formation of the pancreas1 and liver2 and induction of endocrine and hepatic cell types in these endodermal organs requires inductive signals from blood vessels. BioEssays 24:397,400, 2002. Published 2002 Wiley Periodicals, Inc. [source] | ||||||||||