scholarly journals Reproductive Biology and Bioturbatory Activities of Two Sympatric Species of Fiddler Crabs Uca lactea annulipes and Uca triangularis bengali (Decopada : Ocypodidae) at the East Midnapore Coastal Belt of West Bengal, India

2014 ◽  
Vol 5 (2) ◽  
pp. 106 ◽  
Author(s):  
Subhasish Chatterjee ◽  
Tapas Kumar Das ◽  
Susanta Kumar Chakraborty

Two sympatric species of fiddler crabs viz. Uca lactea annulipes and Uca triangularis bengali belonging to order decapoda, family ocypodidae have been taken into consideration in respect of their habitat preference, sex ratio, fecundity and role of bioturbatory activities in sustaining the coastal-estuarine-ecosystem dynamics at an ecotone (Talsari) located in the Midnapore (East) coastal belt of West Bengal, India. A distinct segregation of habitats of these two species was evident from this field study. In general, monthly sex ratios were a clearly male biased for both species. Reproductive potential and intensity of the studied fiddler crabs have been measured by quantifying the relative frequency of ovigerous females and their fecundities. These two crabs have been to be as excellent bioturbator mediators and their bioturbatory activities were found to alter geochemistry of sediments by way of making semidomes (only male of U. lactea annulipes) and mudballs (both sexes of U. triangularis bengali). These bioturbatory structures used to play some role in the social as well sexual interactions of both species.

2019 ◽  
Vol 38 (2) ◽  
pp. 312-328 ◽  
Author(s):  
Natasha Cornea

Analysis of politics in urban West Bengal has focussed on the near hegemonic control of political parties and the state on daily life – overlooking or under-accounting for the complex institutional assemblages that shape spaces of the political in daily life. Addressing this empirical gap, this paper examines the role of social clubs, who discursively imagine themselves to be not political in governing the city. I demonstrate the ways that clubs, as a particular socio-cultural institution, territorialise power in order to produce governable space and in turn act as both alternative to the state and party and intermediaries with them. Mobilising evidence from extensive qualitative research on governance in two small cities I seek to complicate and nuance existing narratives on everyday politics, the party and the role of clubs in West Bengal. And in doing so offer theoretical contributions to the ways we understand political subjects and the social production of the heterogeneous overlapping territories of governance that characterise postcolonial cities.


2017 ◽  
Vol 4 (2) ◽  
pp. 236
Author(s):  
Yuli Krisnawati ◽  
I Wayan Arthana ◽  
Ayu Putu Wiweka Krisna Dewi

Fiddler crabs (Uca spp.) are one of the mangrove fauna that has an important role of food chain within the scope of mangrove, which is as a deposit eater. The mangrove area in Kampoeng Kepiting has been damaged due to reclamation for Bali Mandara toll road construction, which can interfere the survival/existence of Fiddler crabs. Therefore, it is necessary to do a research concerning the abundance of Fiddler Crabs in Kampoeng Kepiting mangrove area. The aim of this study is to determine the type and abundance of Fiddler crabs and to discover the coherency among Fiddler Crabs abundance in the manner of c-organic matter content in Kampoeng Kepiting area. Fiddler crabs samples were carried out using 1×1 meter quadrant transect by digging as deep as 30 cm. The abundance of Fiddler crabs was analyzed under the Krebs equation. The results from this study indicate Fiddler crabs were found in Kampoeng Kepiting area ,i.e. Uca demani, Uca coarctata, Uca dussumieri, Uca bellator, Uca lactea perplexa, Uca tetragonon, Uca chlorophthalmus crassipes, Uca lactea annulipes, Uca triangularis, and Uca vocans. The highest Fiddler crabs abundance were found at station 4 which is 72±4,2 ind/m2, whilst the abundance of Fiddler crabs (Uca spp.) at station 5 is (33±1,2 ind/m2). The c-organic matter content has a strong relationship with the abundance of Fiddler crabs in Kampoeng Kepiting mangrove area (r = 0,91). This study shows that mangrove conditions in Kampoeng Kepiting are still able to support Fiddler Crabs (Uca spp.) existence.


2018 ◽  
Vol 23 (3) ◽  
pp. 233-249 ◽  
Author(s):  
Eric Bonetto ◽  
Fabien Girandola ◽  
Grégory Lo Monaco

Abstract. This contribution consists of a critical review of the literature about the articulation of two traditionally separated theoretical fields: social representations and commitment. Besides consulting various works and communications, a bibliographic search was carried out (between February and December, 2016) on various databases using the keywords “commitment” and “social representation,” in the singular and in the plural, in French and in English. Articles published in English or in French, that explicitly made reference to both terms, were included. The relations between commitment and social representations are approached according to two approaches or complementary lines. The first line follows the role of commitment in the representational dynamics: how can commitment transform the representations? This articulation gathers most of the work on the topic. The second line envisages the social representations as determinants of commitment procedures: how can these representations influence the effects of commitment procedures? This literature review will identify unexploited tracks, as well as research perspectives for both areas of research.


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