Rapid Assessment of the Sex Ratio of the Fiddler Crab, Uca tangeri, in Two Mangrove Habitats on the Bonny River
M. Torle, M. Miebaka, J. Onwuteaka
Annual Research & Review in Biology · pp. 1–12 · Published 16 Apr 2019
10.9734/arrb/2019/v31i430058Abstract
A rapid assessment of the sex ratio of the fiddler crab, Uca tangeri, was undertaken in two mangrove habitats on the Bonny River which were undergoing intense human impact as a result of dredging and urbanization activities. The contrasting adult sex ratios of 4:1 of male to female at Eagle Island and 1:2.6 at Rumuolumini and or juveniles showing 2.4:1 (Eagle Island) and 1:1.8 (Rumuolumini) were highly significant (χ2 test, P<0.05). This shows evidence of studies supporting deviation in Uca spp from the 1:1 proportion. Evidence of anthropogenic activity and intensive socioeconomic exploitation provided no explanation for the contrasting high deviation in ratio of males to females between Eagle Island and Rumuolumeni habitats. Megalopae settlement is evident but the physical, chemical and interspecific cues that determine gender balance are necessary for any intended future conservation planning.
References (25)
- 1 Burrow structure and use in the sand fiddler crab, Uca pugilator (Bosc) [DOI]
- 2 SEASONAL BREEDING CYCLES AND SEX RATIOS OF EIGHT SPECIES OF CRABS FROM MGAZANA, A MANGROVE ESTUARY IN TRANSKEI, SOUTHERN AFRICA [DOI]
- 3 Comparative population dynamics of four fiddler crabs (Ocypodidae, genus Uca) from a North Brazilian mangrove ecosystem [DOI]
- 4 Salinity-temperature tolerance and osmoregulation in Eurytemora affinis (Poppe) (Copepoda : Calanoida) in relation to its distribution in the zooplankton of the upper reaches of the Forth estuary [DOI]
- 5 Early life history of Hemigrapsus sanguineus, a non-indigenous crab in the Middle Atlantic Bight (USA) [DOI]
- 6 Mechanism for the re-invasion of an estuary by two species of brachyuran megalopae [DOI]
- 7 Increased burrowing by fiddler crabs Uca rapax (Smith) (Decapoda : Ocypodidae) in response to low food supply [DOI]
- 8 Gregarious settlement by megalopae of the porcelain crabs Petrolisthes cinctipes (Randall) and P. eriomerus Stimpson [DOI]
- 9 Ecological and Population Studies of Fiddler Crabs (Ocypodidae, Genus Uca) On a Mangrove Shore At Phuket Island, Western Peninsular Thailand [DOI]
- 10 POPULATION BIOLOGY OF UCA THAYERI RATHBUN, 1900 (BRACHYURA, OCYPODIDAE) IN A SUBTROPICAL SOUTH AMERICAN MANGROVE AREA: RESULTS FROM TRANSECT AND CATCH-PER-UNIT-EFFORT TECHNIQUES [DOI]
- 11 Settlement and recruitment of the fiddler crabs Uca pugnax and U. pugilator in a North Carolina, USA; salt marsh [DOI]
- 12 Multiple cues from multiple habitats: Effect on metamorphosis of the Florida stone crab, Menippe mercenaria [DOI]
- 13 Population and reproductive biology of the fiddler crab Uca thayeri Rathbun, 1900 (Crustacea: Ocypodidae) in a tropical mangrove from Northeast Brazil [DOI]
- 14 Population Structure of the Land Crab Johngarthia Lagostoma on Ascension Island [DOI]
- 15 Multiple cues for induction of metamorphosis in larvae of the common mud crab Panopeus herbstii [DOI]
- 16 Biological Studies of the Mud Crab, Scylla serrata (Forskal) of the Sundarbans Mangrove Ecosystem in Khulna Region of Bangladesh [DOI]
- 17 Isolation and characterization of the metamorphic inducer of the common mud crab, Panopeus herbstii [DOI]
- 18 Effects of substrata and conspecific odour on the metamorphosis of mangrove crab megalopae, Ucides cordatus (Ocypodidae) [DOI]
- 19 Metamorphosis of mangrove crab megalopae, Ucides cordatus (Ocypodidae): Effects of interspecific versus intraspecific settlement cues [DOI]
- 20 POPULATION STRUCTURE OF THE FIDDLER CRAB UCA LEPTODACTYLA RATHBUN, 1898 (BRACHYURA: OCYPODIDAE) IN A TROPICAL MANGROVE OF NORTHEAST BRAZIL
- 21 More common than reported: range extension, size–frequency and sex-ratio of Uca (Minuca) victoriana (Crustacea: Ocypodidae) in tropical mangroves, Brazil [DOI]
- 22 Relative growth and morphological sexual maturity of Chasmagnathus granulatus (Crustacea, Varunidae) from a mangrove area in southeastern Brazilian coast [DOI]
- 23 Effect of experimentally applied chlorinated hydrocarbons on the biomass of the fiddler crab, Uca pugnax (Smith) [DOI]
- 24 Journal of Experimental Marine Biology and Ecology
- 25 Estuarine and coastal marine science [DOI]
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