Results 111 to 120 of about 466 (141)
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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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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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Changes in the behaviour ofOcypode quadrata(Fabricius, 1787) after experimental trampling
Journal of the Marine Biological Association of the United Kingdom, 2018AbstractThe effects of trampling are usually confounded by the diffuse impacts of the urbanization of sandy beaches. We performed a controlled experiment on a beach with low visitation rates to test the hypothesis that ghost crabs avoid building their burrows on impacted plots as a result of the compacted sediment, and they migrate to non-trampled ...
Leonardo Lopes Costa +2 more
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Reproductive Cycling in the Ghost Crab, Ocypode Quadrata (Fabr.) (Brachyura, Ocypodidae)
Crustaceana, 1972[L'activite reproductrice cyclique du Crabe Ocypode quadrata (Fabr.), de la cote centrale du Texas, a ete determinee d'apres l'analyse de la maturite et de l'activite reproductrice des femelles apres la puberte (la largeur de la carapace est superieure a 25,0 mm) pendant une annee. Les Crabes sont actifs sur la plage depuis mars jusqu'a decembre.
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Ghost crab (Ocypode quadrata) modify their behavior during mirror exposure
Behavioural ProcessesRecently, ghost crabs (Ocypode quadrata) were shown to exhibit behavior consistent with passing the mark test, which implies the capacity for self-recognition. Considering this, it seems reasonable to suggest these animals can also distinguish their mirror image from different social stimuli, such as live conspecifics.
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Burrows of Ocypode quadrata (Fabricius) as related to slopes of substrate surfaces
Journal of Paleontology, 1986Diameter, dip and orientation of burrows of the ghost crab Ocypode quadrata (Fabricius) were measured in back-beach areas: dune faces, dune crests, swales, blowouts and washover fans. Slope direction of the substrate at each burrow site was also measured. Results support three conclusions. First, burrow diameter increases landward.
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Landmark use by ghost crab (Ocypode quadrata) during wayfinding in a complex maze
Behavioural ProcessesSpecies of crab have been shown to spatially track and navigate to consequential locations through different processes, such as path integration and landmark orienting. Few investigations examine their ability to wayfind in complex environments, like mazes, with multiple intersections and how they may utilize specific features to benefit this process ...
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Journal of Experimental Marine Biology and Ecology, 1978
Abstract Food habits and ecological role of the ghost crab. Ocypode quadrata ( Fabricius) on a North Carolina barrier beach have been investigated in field and laboratory studies. Despite previous reports that they are scavengers, the crabs spent little time in ureas where drifted material accumulated.
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Abstract Food habits and ecological role of the ghost crab. Ocypode quadrata ( Fabricius) on a North Carolina barrier beach have been investigated in field and laboratory studies. Despite previous reports that they are scavengers, the crabs spent little time in ureas where drifted material accumulated.
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