Avian Navigation, Geomagnetic Field Sensitivity, and Biogenic Magnetite

Presti, David E.

doi:10.1007/978-1-4613-0313-8_22

Cited by 8 publications

(4 citation statements)

References 112 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unobscured sunlight was necessary for Adelie penguins to navigate accurately to the ice edge in the Ross Sea (Emlen & Penney 1966), even though the use of magnetic fields by birds to navigate is also generally accepted (reviewed by Presti 1985 andMoore 1987). Considerable evidence, however, indicates that visual cues are equally or more important than magnetic fields for initiating and maintaining a course in birds migrating by day and night (Martin 1990b and references therein).…”

Section: Arrivals and Departures At Nightmentioning

confidence: 99%

“…Empirical and experimental evidence points to vision as the primary sense used by birds to negotiate their environment by day and night (reviewed by Martin 1990a, b), even though olfactory and magnetic cues have also proven important (Presti 1985, Verheyden & Jouventin 1994, Nevitt et al 1995. The vast majority of the world's bird species are active primarily during the day, and less than 1 % are active entirely at night (Martin 1990b).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Foraging modes of chinstrap penguins:contrasts between day and night

Jansen¹,

Boveng²,

Bengtson³

1998

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Penguins rely on vision to travel and hunt at sea. Vision in marine predators, particularly those hunting phototactic prey under a broad range of light intensities, must be better understood to realize how these species respond to changes in their environment. We studied the effects of daily cycles in light intensity on visual predators by examining the duration and timing of chinstrap penguins' PjrgosceUs antarctica foraging trips and the size, composition, and timing of their meals. We used radio telemetry and stomach-contents sampling to study adult penguins that were provisioning chicks during the summers of 1993 and 1994 at Seal Island, Antarctica. The penguins rarely initiated or terminated foraging trips at night, but otherwise varied the timing and duration of trips to sea. Cluster analyses using departure and arrival times revealed 5 distinct modes of foraging: 3 were strictly diurnal (early, mid-, and late) and 2 were partly nocturnal (overnight and extended). Durations of diurnal trips (4 to 11 h) were shorter than overnight (13 to 14 h) and extended trips (18 to 22 h). Early and rniddiurnal trips and extended trips were significantly shorter in 1993 than in 1994; late diurnal and overnight trip durations did not differ between years. Diurnal foraging was most common in 1993, whereas overnight foraging predominated in 1994. Shortened diurnal foraging in 1993 appears to have increased the frequency of diurnal foraging by allowing more parent birds to alternate diurnal trips within a single day and by reducing the incidence of birds extending diurnal foraging through the night. That penguins foraged more frequently by day when permitted by shorter trip durations (in 1993) suggests that they opted to forage diurnally whenever possible. Returning dlurnal and overnight foragers had greater than 99 and 74 % Antarctic krill Euphausia superba by weight in their stomachs, respectively However, overnight foragers also returned with significant amounts of highly digested remains of pelagic fish, suggesting birds were in offshore waters talung fish during the night. In contrast, only 1 out of 40 diurnal foragers from both years combined had evidence of fish. Thus, the daily light cycle affected both the timing and duration of chinstrap penguin foraging as well as the type of prey consumed during trips to sea.

show abstract

Section: Arrivals and Departures At Nightmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Foraging modes of chinstrap penguins:contrasts between day and night

Jansen¹,

Boveng²,

Bengtson³

1998

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Photo credits: All photos by David Presti [Color figure can be viewed at wileyonlinelibrary.com] Pettigrew, 1980). Decades later, though there is an abundance of behavioral data speaking to animals' use of the geomagnetic field as a navigational aid, the mechanism (or mechanisms) of how this is accomplished remains unclear (Mouritsen, 2018;Presti, 1985;Wiltschko & Wiltschko, 2019).…”

Section: The (Still) Mysterious Sense Of Geomagnetic Field Detectionmentioning

confidence: 99%

“…We proposed a detection mechanism involving coupling magnetic particles together with highly sensitive mechanoreceptors, such as those found in muscle spindles—but we were unable to locate any sensory detector structures, nor measure any neural activity correlated with magnetic field variations (Presti & Pettigrew, ). Decades later, though there is an abundance of behavioral data speaking to animals' use of the geomagnetic field as a navigational aid, the mechanism (or mechanisms) of how this is accomplished remains unclear (Mouritsen, ; Presti, ; Wiltschko & Wiltschko, ).…”

Section: The (Still) Mysterious Sense Of Geomagnetic Field Detectionmentioning

confidence: 99%

Collaborative dialogue between Buddhism and science: A contribution to expanding a science of consciousness

Presti

2020

J of Comparative Neurology

Self Cite

View full text Add to dashboard Cite

Investigation of consciousness (experience, mind, awareness, subjectivity) has become an accepted endeavor in contemporary neuroscience. However, current work is largely limited to study of neural correlates of consciousness. While this is interesting and important, it may not be sufficient to carry us to a place of truly new insight regarding consciousness. I argue that one element of expanding a science of consciousness is appreciation of the interdependent co-creation or enfolding of mind and world. Addressing this interdependence is an aspect of the collaborative engagement of the traditions of Buddhism and science-a project that is exploring how complementary worldviews and analytic procedures might further the development of an expanded science of mind. In this essay, written for a collection honoring the life and work of Jack Pettigrew, I describe his connection to this project.

show abstract

Magnetite biomineralization and geomagnetic sensitivity in higher animals: An update and recommendations for future study

Kirschvink

1989

Bioelectromagnetics

102

View full text Add to dashboard Cite

Magnetite, the only known biogenic material with ferromagnetic properties, has been identified as a biochemical precipitate in three of the five kingdoms of living organisms, with a fossil record that now extends back nearly 2 billion years. In the magnetotactic bacteria, protoctists, and fish, single-domain crystals of magnetite are arranged in membrane-bound linear structures called magnetosomes, which function as biological bar magnets. Magnetosomes in all three of these groups bear an overall structural similarity to each other, which includes alignment of the individual crystallographic [111] directions parallel to the long axis. Although the magnetosomes represent only a small volume fraction in higher organisms, enough of these highly energetic structures are present to provide sensitivity to extremely small fluctuations and gradients in the background geomagnetic field. Previous experiments with elasmobranch fish are reexamined to test the hypothesis that gradients played a role in their successful geomagnetic conditioning, and a variety of four-turn coil designs are considered that could be used to test the various hypotheses proposed for them.

show abstract

Avian Navigation, Geomagnetic Field Sensitivity, and Biogenic Magnetite

Cited by 8 publications

References 112 publications

Foraging modes of chinstrap penguins:contrasts between day and night

Foraging modes of chinstrap penguins:contrasts between day and night

Collaborative dialogue between Buddhism and science: A contribution to expanding a science of consciousness

Magnetite biomineralization and geomagnetic sensitivity in higher animals: An update and recommendations for future study

Contact Info

Product

Resources

About