Apparent Predation on the Mole Crab Emerita talpoida (Say) by the Ghost Crab Ocypode quadrata (Fabricius)

1976 ◽  
Vol 17 (1) ◽  
pp. 65 ◽  
Author(s):  
Robert R. Fales
Keyword(s):  
Ghost Crab ◽  
Ocypode Quadrata ◽  
Emerita Talpoida

Population density and activity pattern of the ghost crab, Ocypode quadrata, in Veracruz, Mexico

Crustaceana ◽  
2007 ◽  
Vol 80 (3) ◽  
pp. 313-325 ◽  
Author(s):  
Luis Abarca-Arenas ◽  
Fernando Alvarez ◽  
Mateo Escobar ◽  
Elizabeth Valero-Pacheco
Keyword(s):  
Population Density ◽  
Activity Pattern ◽  
Ghost Crab ◽  
Ocypode Quadrata

scholarly journals Low Densities of the Ghost Crab Ocypode quadrata Related to Large Scale Human Modification of Sandy Shores

2021 ◽  
Vol 8 ◽  
Author(s):  
Carlos A. M. Barboza ◽  
Gustavo Mattos ◽  
Abílio Soares-Gomes ◽  
Ilana Rosental Zalmon ◽  
Leonardo Lopes Costa
Keyword(s):  
Wave Energy ◽  
Natural Habitat ◽  
Sandy Beaches ◽  
Sea Surface ◽  
Ghost Crab ◽  
Natural Systems ◽  
Sandy Shores ◽  
Use Of Resources ◽  
Ocypode Quadrata ◽  
Human Modification

Sandy beaches are the most common ecosystems of coastal regions and provide direct and indirect essential services for millions of people, such as coastal protection, fishing, tourism, and recreational activities. However, the natural habitats of sandy shores are being modified at rates never experienced before, making beaches key monitoring sites of marine ecosystems worldwide. The ghost crab species Ocypode quadrata is the most conspicuous crustacean of sandy beaches along the Western Atlantic coast and has been successfully used as an indicator of anthropogenic disturbance and environmental variability. To investigate the potential role of a “triple whammy” [(1) urbanization; (2) use of resources; (3) decreasing resilience] on the most common bioindicator of sandy shores, we compiled a dataset including 214 records of burrows density from 94 microtidal sandy beach sectors covering a range of over 65° of latitude. The response of burrows density to synergetic effects of human modification of natural systems and environmental changes was investigated using linear models. We used the cumulative Human Modification (HMc) index, a standardized geographic projection of changes of natural systems, as a predictor of urbanization, industrialization and use of resources. The predictor wave energy, tidal range and temperature (sea surface and air) were included as potential effects of climate changes. Literature review showed records mainly concentrated at sub-tropical and temperate regions. HMc values were clearly negatively related to burrows density, thereby supporting an effect of modification of natural habitat at large spatial scale. Sea surface temperature and air temperature were positive related with density and the lack of a general pattern of the relationship between burrows density, interactions between wave energy and tide range, supported unclear patterns reported at regional scales. Finally, we argue that ghost crabs are valuable targets for protection actions on sandy beaches that can benefit coexisting species and provide natural habitat conservation.

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