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Taxonomic classification of fiddler crabs with notes on their ecological distribution in Brgy. Agus, Lapu-Lapu City.


Michelle P. Brigoli,
Rosean Hope M. Canton,
Van Alfred A. Enriquez,
Marionne Celina M. Macapaz,
Kristine Y. Tatonetti,
Vitaliano V. Fernandez

Related Institution

College of Arts and Sciences – Department of Biology - Cebu Doctors' University

Publication Information

Publication Type
Thesis Degree
Publication Date
October 2017


   A study on the fiddler crabs, Uca spp. was conducted to determine their abundance, sex ratio and distribution of the different species in the muddy-sandy intertidal zone of Brgy. Agus, Lapu-Lapu City. Transect lines were laid on each designated sites of the muddy-sandy intertidal zone in Agus, Lapu-Lapu City. In every transect line, plots were alternately established. Fish nets were laid inside the plots and were mainly used as traps for the fiddler crabs. Barbecue sticks were then installed at the corners of the plots to hold the fish nets. The trapped fiddler crabs were gathered and later on identified according to their type of species and sex. They were collected per transect and were placed in its designated plant pots for the mean time to avoid duplication.

   Based on the 138 fiddler crabs gathered subjects, it shows the presence of three fiddler crab species namely Uca crassipes, Uca perplexa and Uca triangularis. The distribution of the three species appeared to be influenced by substrate type. Uca crassipes was the most abundant in the area; since the area is mostly composed of limestones where Uca crassipes is commonly found. Males are more visible than females because males spend more time defending their burrows and attracting females. This explains why males are abundant than females in term of population.

   Therefore, we concluded that fiddler crabs were mostly found in the mangrove areas and Uca crassipes was the most abundant species found at Barangay Agus, Lapu-Lapu City; furthermore, it was also found out that male fiddler crabs were more abundant in population compared to the female fiddler crabs. We recommend this study to the barangay officials, visitors, and the nearby residents for further knowledge, and also, to the future researchers if they wish to explore more on the subject matter.


1. Backwell, P. . (). The crab lab: fiddler crabs. . Retrieved January 4, 2017, from: http://biology-assets.anu.edu.au/hosted_sites/backwell3/
2. (). Barangays: Agus.. . Retrieved March 4, 2017, from: http://www.lapulapucity.gov.ph/index.php/agus
3. Bartocillo, A. M. , Lagman, M. C. . Species identification andeffect of substrate on the distribution of fiddler crabs, Uca spp. inOlango Island Wildlife Sanctuary, Cebu. De La Salle University,Manila, Philippines: 2017. . Retrieved from: http://www.dlsu.edu.ph/conferences/dlsu-research-congressproceedings/2017/C ENSER/CENSER-II-022.pdf
4. Boregon, K. J. G. , Evangelio, J. C. . "Population ecology of thefiddler crab Uca spp. in Brgy. Punta, Baybay City, Leyte" Annals of Tropical Research 37(2): 23-34, 2015. Retrieved from: http://https://www.researchgate.net/publication/292149072_Population_Ecology_of_the_Fiddler_Crab_Uca_spp_in_Brgy_Punta_Baybay_City_Leyte
5. Crane, J. . (). Fiddler crabs of the world: Ocypodidae: Genus Uca. . Retrieved February 14, 2017, from: http://https://decapoda.nhm.org/pdfs/15051/15051-001.pdf
6. Cyprus, S. . (). What are fiddler crabs?. . Retrieved January 12, 2017, from: http://www.wisegeek.com/what-are-fiddler-crabs.htm#
7. (). Fiddler crabs: Sand fiddler crabs (Uca pugnax), March fiddler crab (Ucapugilator), Mud fiddler crab (Uca minar). . Retrieved January 25, 2017, from: http://www.edc.uri.edu/restoration/html/gallery/invert/fiddler.htm
8. Genoni, G. . "Increased burrowing by fiddler crabs Ucarapax (Smith)(Deacapoda Ocypodidae) in response to low food supply" Journal of Experimental Marine Biology and Ecology 147(2): 1991. Retrieved from: http://www.sciencedirect.com/science/article/pii/002209819190186Z
9. Holguin, G. , Vazquez, P. , Bashan, Y. . "The role of sedimentmicroorganisms in the productivity, conservation, and rehabilitationof mangrove ecosystems: An overview" Biology and Fertility of Soils 33(4): 2001. Retrieved from: http://doi:10.1007/s003740000319
10. Levinton, J. . (). Fiddler crabs. . Retrieved March 4, 2017, from: http://life.bio.sunysb.edu/marinebio/westmeadow/fiddler.html
11. Lim, A. . (). Hippocampus comes. . Retrieved March 19, 2017, from: http://www.iucnredlist.org/details/41008/0
12. Litulo, C. . "Population biology of the fiddler crab Uca annulipes(Brachyura: Ocypodidae) in a tropical East African mangrove(Mozambique)" Estuarine, Coastal and Shelf Science 62(1-2): 2005. Retrieved from: http://doi:10.1016/j.ecss.2004.09.009
13. Martins, S. B. , Masunari, S. . "Temporal distribution in theabundance of the fiddlercrab Uca (Leptuca) uruguayensis Nobili, 1901 (Decapoda:Ocypodidae) from Garcas River mangrove, Guaratuba Bay,southern Brazil" Nauplius 21(2): 151-159, 2013. Retrieved from: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972013000200 003
14. Mchenga, I. S. S. , Takagi, K. K. , Tsuchiya, M. . "Effects of seasons and burrowing crabs (Uca spp.) on sediment nutrients and mangrove sapling growth" SUZA Journal of Natural and Social Science 1(1): 33-48, 2012. Retrieved from: http://https://www.researchgate.net/profile/Islam_Mchenga/publication/280931884_Effects_of_seasons_and_burrowing_crabs_Uca_spp_on_sediment_nutrients_and_mangrove_sapling_growth/links/55cc4fdd08aebc967dfe222f/Effects-of-seasons-and-burrowing-crabs-Ucaspp-o
15. Mokhtari, M. , Ghaffar, M. A. , Usup, G. , Cob, Z. C. . "Determination ofkey environmental factors responsible for distribution patternsof fiddler crabs in a tropical mangrove ecosystem" PLoS ONE 10(1): 2015. Retrieved from: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0117467
16. Nobbs, M. . The behavioral ecology of fiddler crabs (genus: Uca)that live in the mangrove forests of Darwin Harbour. Northern Territory University. 1999. (MD) . Retrieved from: http://https://espace.cdu.edu.au/eserv/cdu:6312/Thesis_CDU_6312_Nobbs_M.pdf
17. Nobbs, M. , McGuinness, K. . "Developing methods for quantifying the apparent abundance of fiddler crabs (Ocypodidae: Uca) in mangrove habitats" Australian Journal of Ecology 24, 1999. Retrieved from: http://doi:10.1046/j.1442-9993.1999.00945.x
18. Project Seahorse(). Areas of focus: Saving seahorses. . Retrieved March 5, 2017, from: http://www.projectseahorse.org/seahorses/
20. Shapiro, L. . (). Brief summary. . Retrieved February 5, 2017, from: http://eol.org/data_objects/22428384
21. South Carolina Aquarium(). Sand fiddler crab. . Retrieved February 25, 2017, from: http://scaquarium.org/our-animals/sand-fiddler-crab/
22. Wenner, E. . (). Fiddler crabs. . Retrieved February 13, 2017, from: http://www.dnr.sc.gov/cwcs/pdf/FiddlerCrab.pdf
23. Zeil, J. , Hemmi, J. M. , Backwell, P. R. Y. . "Fiddler crabs" Current Biology 16(2): 2006. Retrieved from: http://www.cell.com/current-biology/fulltext/S0960-9822(06)01015-3

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LocationLocation CodeAvailable FormatAvailability
Cebu Doctors' University - Main Library U1 T199br 2017 Fulltext Print Format

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