Results 121 to 130 of about 517 (163)

Orientation of the ghost-crab Ocypode in polarized light

Zeitschrift f�r Vergleichende Physiologie, 1963
1. Die Krabbe Ocypode ceratophthalma (Pallas) lebt im Sand der Gezeitenzone tropischer und subtropischer Meere im Indo-Pazifischen Raum. Die Jungtiere graben schrag nach unten fuhrende Gange, die sie zur Nahrungsaufnahme verlassen und wieder aufsuchen.
Karl Daumer, Rudolf Jander, Talbot H. Waterman   +2 more
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Responses of ghost crabs to habitat modification of urban sandy beaches

Marine Environmental Research, 2016
Sandy beaches in highly urbanised areas are subject to a wide range of human impacts. Ghost crabs are a commonly used ecological indicator on sandy beaches, as they are key consumers in these systems and counting burrow openings allows for rapid assessment of population size.
Talia P, Stelling-Wood, Graeme F, Clark, Alistair G B, Poore   +2 more
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Ghost Fishing by Blue Crab Traps

North American Journal of Fisheries Management, 1993
Abstract Ghost fishing by abandoned or lost traps for blue crab Callinectes sapidus was evaluated experimentally in the Timbalier Bay estuary, Louisiana. An average of 12.8 blue crabs per trap were captured by the initial baiting, and an additional 34.9 blue crabs later entered each subsequently unbaited trap; of the total captured, 25.8 died and 21.7 ...
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Learning of leg position by the ghost crab Ocypode ceratophthalma

Behavioral Biology, 1976
Experiments were carried out on the ability of single legs of the whole ghost crab Ocypode ceratophthalma to learn to avoid the receipt of electric shocks coupled with leg position (the Horridge paradigm). Ocypode is a common, hardy, very active, air-breathing subtropical species. Aversive shocks were delivered through a silver wire attached to the
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Family Ocypodidae Rafinesque, 1815 (Ghost Crabs, Fiddler Crabs)

2017
Carapace quadrate, transversely rectangular, pentagonal, markedly thick, dorsal surface moderately convex, smooth, regions weakly or never defined, lateral margins entire, without any dentation, junction between anterolateral and posterolateral margins not distinct. Front markedly narrow, straight, or very faintly bilobed, strongly deflexed.
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Uptake of soil capillary water by ghost crabs

Nature, 1976
SEVERAL semiterrestrial crabs, including some ghost crabs (genus Ocypode) can extract interstitial water from damp sand1–3. This enables them to offset their high evaporative losses even in habitats lacking surface water. The mechanism involved has remained unknown, although there have been a few observations of how Gecarcinus lateralis takes up ...
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Stride frequency in relation to allometric growth in ghost crabs

Journal of Zoology, 2015
AbstractBody size has significant impacts on fundamental processes of locomotion, including the operational frequency of skeletal muscle contraction, which declines systematically with increasing size. Although this shift in operation frequency and contractile kinetics is well documented in the literature, the mechanisms responsible for these changes ...
S. B. Whittemore, B. Hoglin, M. A. Green, S. Medler   +3 more
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The ultrastructure of normal and glycerol treated muscle in the ghost crab, Ocypode cursor

Cell and Tissue Research, 1975
The ultrastructure of normal and glycerol treated fibers of the closer muscle of the ghost crab, Ocypode cursor, was studiedmthe muscle is composed of presumably phasic (short sarcomeres) and tonic (long sarcomeres) fibers, the latter greatly predominating. Horseradish peroxidase (HRP) was used as an extracellular tracer to delineate the tubular system
M, Castel, D, Papir
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Barth's myochordotonal organ as an acoustic sensor in the ghost crab,Ocypode

Experientia, 1974
Nachweis des Barth'schen Myochordotonal-Organs bei der KrabbeOcypode, als sensorieller Apparat fur hochfrequente, akustische Signale.
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Light pollution and ghost crab road-kill on coastal habitats

Regional Studies in Marine Science, 2020
Abstract Ghost crabs are exposed to vehicles on sandy beaches and adjacent habitats. The occurrence of individuals on coastal roads constitutes one issue to be considered for beach management at regional scales. In this context, we aimed to test whether the abundance of the ghost crab Ocypode quadrata in the road crossing a beach vegetation is ...
Leonardo Lopes Costa, Nina Aguiar Mothé, Ilana Rosental Zalmon   +2 more
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