Results 101 to 110 of about 178 (136)
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Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, 2023
AbstractOcypode quadrata, a Ghost crab species found along the western Atlantic coast, is considered a bioindicator of anthropogenic impact on sandy beaches. Ghost Crabbing, a touristic activity in which ghost crabs are chased just for fun, is a potentially threatening activity for this crab. In crustaceans, metabolites such as glucose and lactate, and
Éverton Lopes Vogt +8 more
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AbstractOcypode quadrata, a Ghost crab species found along the western Atlantic coast, is considered a bioindicator of anthropogenic impact on sandy beaches. Ghost Crabbing, a touristic activity in which ghost crabs are chased just for fun, is a potentially threatening activity for this crab. In crustaceans, metabolites such as glucose and lactate, and
Éverton Lopes Vogt +8 more
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Recreational impacts on the distribution of ghost crabs Ocypode quadrata fab.
Biological Conservation, 1981Abstract Studies were conducted at Assateague Island, Maryland-Virginia, to determine the relative number of ghost crabs Ocypode quadrata Fab. on beaches subject to different recreational uses. The mean density of crabs per 0·1 ha plots was found to be 10 on an undisturbed beach, 19 on a pedestrian-impacted beach, 1 on a light off-road vehicle (ORV ...
Alan J. Steiner, Stephen P. Leatherman
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Evidence of marine debris usage by the ghost crab Ocypode quadrata (Fabricius, 1787)
Marine Pollution Bulletin, 2018Sandy beaches are sites of marine debris stranding, but the interaction of beach biota with waste is poorly studied. The objective of this study was to investigate whether the ghost crab Ocypode quadrata selects marine debris by types using a non-destructive method on sandy beaches of Southeastern Brazil.
Leonardo Lopes, Costa +2 more
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Eyestalk Movements Induced by Polarized Light in the Ghost Crab, Ocypode quadrata
Science, 1961Differential visual sensitivity to vertical and horizontal linear polarization is shown in the light-induced eyestalk deviations of Ocypode quadrata. Responses with the e -vector vertical averaged about 6° greater than those with e-vector horizontal.
H, SCHOENE, H, SCHOENE
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Seasonal variation of energy metabolism in ghost crab Ocypode quadrata at Siriú Beach (Brazil)
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2007The aim of this study was to analyze the seasonal variations of carbohydrate and lipid metabolism of the ghost crab Ocypode quadrata (Fabricius, 1787) on a sandy beach in the southern region of Brazil. Crabs and hemolymph samples were collected monthly in the field. Hepatopancreas, gills, gonads and claw muscles were used for glycogen determination. In
Anapaula Sommer, Vinagre +4 more
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Journal of Experimental Marine Biology and Ecology, 2019
Abstract Intense natural disturbances can dramatically affect populations in various ecosystems and existence of human influences can make the impacts of natural disturbance even greater by reducing the resilience of the populations. Here, we determine how the impacts of natural and anthropogenic disturbances alter population structure of a ...
Mustafa R. Gül, Blaine D. Griffen
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Abstract Intense natural disturbances can dramatically affect populations in various ecosystems and existence of human influences can make the impacts of natural disturbance even greater by reducing the resilience of the populations. Here, we determine how the impacts of natural and anthropogenic disturbances alter population structure of a ...
Mustafa R. Gül, Blaine D. Griffen
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Structure and function of the hemocyanin from a semi-terrestrial crab,Ocypode quadrata
Journal of Comparative Physiology B, 1987Structural and functional studies of the hemocyanin of the semi-terrestrial ghost crab, Ocypode quadrata, demonstrate a variety of differences in comparison to the hemocyanin of aquatic crabs. These differences may be related to the terrestrial habit of this crab.
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Spatial Patterns of Ocypode Quadrata: a Re-Evaluation (Decapoda, Brachyura)
Crustaceana, 1981Le Roi, O., 1905. Zwei neue parasitische Cirripedien aus der Gruppe der Ascothoracida. Zool. Anz., 29: 399-401. Okada, Y. K., 1925. Contribution ? l'?tude des Cirrip?des Ascothoraciques. I. Notes sur le Dendrogaster arborescens Le Roi; ?tablissement d'un nouveau genre. Bull. Mus. Nat. Hist, nat., Paris, 31: 364-371. Yosii, N., 1931. Note on Myriocladus.
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Population density and activity pattern of the ghost crab, Ocypode quadrata, in Veracruz, Mexico
Crustaceana, 2007The population density of the ghost crab, Ocypode quadrata and its activity pattern were studied in Montepio Beach, Veracruz, Mexico, which is considered a relatively undisturbed beach. Population density estimates were obtained using Wiegert's quadrat method in six samplings from June 2002 to March 2004, and the activity pattern was determined through
Elizabeth Valero-Pacheco +3 more
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Journal of Natural History, 2018
Spatial distribution patterns of the ghost crab Ocypode quadrata were analysed using different approaches at one disturbed and two preserved reflective sandy beaches of the Mexican Caribbean.
Frank A. Ocaña +2 more
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Spatial distribution patterns of the ghost crab Ocypode quadrata were analysed using different approaches at one disturbed and two preserved reflective sandy beaches of the Mexican Caribbean.
Frank A. Ocaña +2 more
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