Rotational Bias in Mosquitofish (Gambusia holbrooki): The Role of Laterality and Sun-compass Navigation

1996 ◽  
Vol 1 (2) ◽  
pp. 161-175 ◽  
Author(s):  
Angelo Bisazza
Keyword(s):  
Gambusia Holbrooki ◽  
Sun Compass ◽  
Compass Navigation

Anatomical basis of sun compass navigation II: The neuronal composition of the central complex of the monarch butterfly

2012 ◽  
Vol 521 (2) ◽  
pp. 267-298 ◽  
Author(s):  
Stanley Heinze ◽  
Jeremy Florman ◽  
Surainder Asokaraj ◽  
Basil el Jundi ◽  
Steven M. Reppert
Keyword(s):  
Monarch Butterfly ◽  
Central Complex ◽  
Sun Compass ◽  
Anatomical Basis ◽  
Compass Navigation

scholarly journals Circadian plasticity in honey bees

2020 ◽  
Vol 42 (2) ◽  
pp. 22-26 ◽  
Author(s):  
Katharina Beer ◽  
Guy Bloch
Keyword(s):  
Circadian Rhythms ◽  
Social Organization ◽  
Honey Bees ◽  
Current Understanding ◽  
Sun Compass ◽  
Dance Communication ◽  
Support Time ◽  
Compass Navigation

Circadian rhythms of about a day are ubiquitous in animals and considered functionally significant. Honey bees show remarkable circadian plasticity that is related to the complex social organization of their societies. Forager bees show robust circadian rhythms that support time-compensated sun-compass navigation, dance communication and timing visits to flowers. Nest-dwelling nurse bees care for the young brood around the clock. Here, we review our current understanding of the molecular and neuroanatomical mechanisms underlying this remarkable natural plasticity in circadian rhythms.

scholarly journals Pigment-Dispersing Factor-expressing neurons convey circadian information in the honey bee brain

Open Biology ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 170224 ◽  
Author(s):  
Katharina Beer ◽  
Esther Kolbe ◽  
Noa B. Kahana ◽  
Nadav Yayon ◽  
Ron Weiss ◽  
...  
Keyword(s):  
Honey Bee ◽  
Pacemaker Cells ◽  
Compass Orientation ◽  
Sun Compass ◽  
Complex Behaviour ◽  
Pigment Dispersing Factor ◽  
Central Brain ◽  
The Brain ◽  
Clock Protein

Pigment-Dispersing Factor (PDF) is an important neuropeptide in the brain circadian network of Drosophila and other insects, but its role in bees in which the circadian clock influences complex behaviour is not well understood. We combined high-resolution neuroanatomical characterizations, quantification of PDF levels over the day and brain injections of synthetic PDF peptide to study the role of PDF in the honey bee Apis mellifera . We show that PDF co-localizes with the clock protein Period (PER) in a cluster of laterally located neurons and that the widespread arborizations of these PER/PDF neurons are in close vicinity to other PER-positive cells (neurons and glia). PDF-immunostaining intensity oscillates in a diurnal and circadian manner with possible influences for age or worker task on synchrony of oscillations in different brain areas. Finally, PDF injection into the area between optic lobes and the central brain at the end of the subjective day produced a consistent trend of phase-delayed circadian rhythms in locomotor activity. Altogether, these results are consistent with the hypothesis that PDF is a neuromodulator that conveys circadian information from pacemaker cells to brain centres involved in diverse functions including locomotion, time memory and sun-compass orientation.

The role of the biological clock in the sun compass orientation of free-running individuals of Talitrus saltator

2005 ◽  
Vol 69 (4) ◽  
pp. 835-843 ◽  
Author(s):  
Felicita Scapini ◽  
Claudia Rossano ◽  
Giovanni M. Marchetti ◽  
Elfed Morgan
Keyword(s):  
Biological Clock ◽  
The Sun ◽  
Compass Orientation ◽  
Sun Compass ◽  
Talitrus Saltator ◽  
Free Running

Comparing food-web impacts of a native invertebrate and an invasive fish as predators in small floodplain wetlands

2011 ◽  
Vol 62 (4) ◽  
pp. 372 ◽  
Author(s):  
Susie S. Ho ◽  
Nick R. Bond ◽  
P. Sam Lake
Keyword(s):  
Chlorophyll A ◽  
Trophic Cascades ◽  
Gambusia Holbrooki ◽  
Floodplain Wetlands ◽  
Poeciliid Fish ◽  
Eastern Australia ◽  
Wetland Mesocosms ◽  
Trophic Role ◽  
Planktonic Communities

Gambusia holbrooki is an invasive predatory poeciliid fish in wetlands of south-eastern Australia, where it coexists with the native waterbug Anisops thienemanni (Notonectidae). Gambusia has been shown to produce trophic cascades, leading to increased algal biomass following invasion, whereas these effects relative to the often-dominant invertebrate predator Anisops are unknown. Given its flexible diet, we predicted that Gambusia would feed more broadly than Anisops, thereby reducing the abundance of zooplankton grazers, and increasing chlorophyll a. We tested this hypothesis in experimental 110-L wetland mesocosms, using Gambusia and Anisops alone and in combination, in addition to no-predator treatments. We ran two experiments lasting 91 and 35 days, respectively. Both fish and macroinvertebrates generated weak trophic cascades, resulting in minor increases in chlorophyll a above concentrations in control treatments. Gambusia, in lowering total zooplankton abundances, triggered a larger, although still relatively small, algal response relative to Anisops. Impacts of both predators on dominant invertebrate grazers (e.g. Simocephalus spp., copepod nauplii) were similar, although Anisops was associated with an increase in ostracod (Newnhamia sp.) numbers. The similar trophic role of the two predators on algae was unexpected, given their different effects on planktonic communities and their very different taxonomic positions and zoogeographic origins.

scholarly journals Anatomical basis of sun compass navigation II: The neuronal composition of the central complex of the monarch butterfly

2012 ◽  
Vol 521 (2) ◽  
pp. Spc1-Spc1 ◽  
Author(s):  
Stanley Heinze ◽  
Jeremy Florman ◽  
Surainder Asokaraj ◽  
Basil el Jundi ◽  
Steven M. Reppert
Keyword(s):  
Monarch Butterfly ◽  
Central Complex ◽  
Sun Compass ◽  
Anatomical Basis ◽  
Compass Navigation
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