Home⇛Annals of Tropical Research⇛vol. 37 no. 2 (2015)

Population Ecology of the Fiddler Crab spp. in Uca Punta, Baybay City, Leyte

Kalvin Jay G Boregon | Julissah C Evangelio

 

Abstract:

A study on the population of the fiddler crabs, spp. was conducted to determine Uca their abundance, density, sex ratio, frequency and distribution pattern in the mangrove area of Punta, Baybay City, Leyte. A total of 126 individual fiddler crabs belonging to three different species were collected in a 6,000 m mangrove area from September to December, 2 2013. The three fiddler crab species were and Uca perplexa, U. triangularis, U. crassipes. Uca perplexa U. had the highest density which occurred only in the landward zone while triangularis U. occurred in all three zones (seaward, middle and landward). The sex ratio of perplexa U. triangularis population did not deviate from the typical 1:1 ratio while did. In terms of their mean size, males of were significantly different from females U. perplexa while showed no significant size difference between males and females. Both U. triangularis U. perplexa U. triangularis and populations had non-normal overall size frequency distributions which were aggregately distributed. Distribution of population U. perplexa appeared to be influenced by substrate type while was not affected by this U. triangularis parameter.



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