scholarly journals Impact of Human Disturbance on Fiddler Crab (<i>Uca tangeri</i>) Burrow Morphology, Distribution and Chemistry at Eagle Island, Niger Delta, Nigeria

2020 ◽  
Vol 10 (04) ◽  
pp. 191-202
Author(s):  
Aroloye O. Numbere
Keyword(s):  
Human Disturbance ◽  
Niger Delta ◽  
Fiddler Crab ◽  
Uca Tangeri ◽  
Burrow Morphology

scholarly journals Erratum to Burrow morphology of three species of fiddler crab (Uca) along the coast of Pakistan

2020 ◽  
Vol 144 (1) ◽  
Author(s):  
Naureen Aziz Qureshi ◽  
Noor Us Saher
Keyword(s):  
Fiddler Crab ◽  
Burrow Morphology

This is a Erratum without an abstract.

scholarly journals Stereotypy and variation in the claw waving display of the fiddler crab Uca tangeri

2007 ◽  
Vol 10 (2) ◽  
pp. 55-62 ◽  
Author(s):  
Joana M. Jordão ◽  
Ana F. Curto ◽  
Rui F. Oliveira
Keyword(s):  
Fiddler Crab ◽  
Waving Display ◽  
Uca Tangeri

scholarly journals Comparison of non-invasive methods for quantifying population density of the fiddler crab Uca tangeri

2003 ◽  
Vol 83 (5) ◽  
pp. 981-982 ◽  
Author(s):  
Joana M. Jordão ◽  
Rui F. Oliveira
Keyword(s):  
Population Density ◽  
Fiddler Crab ◽  
Activity Patterns ◽  
Structure Estimation ◽  
Non Invasive ◽  
Absolute Density ◽  
Crab Density ◽  
Invasive Method ◽  
Surface Active ◽  
Uca Tangeri

Excavation counts (absolute density), burrow counts and surface active individuals visual counts in a Uca tangeri population were compared. Population density estimated from burrow counts was not significantly different from population density estimated by excavation, but the population density estimated with visual counts was significantly lower than the absolute density. Ovigerous females should be the main cause of these differences because they frequently remain underground, but other groups of crabs are also contributing to this difference. Burrow counting is an accurate and quick non-invasive method for the census of U. tangeri. Other population measures (e.g. sex ratio) are not obtainable by burrow counting and only further understanding of the activity patterns of this species along the tide cycle, moon phase and reproductive season will allow visual counting of surface active individuals to be used as quick, efficient and non-invasive method for crab density and population structure estimation.

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