fiddler crab
Building a dishonest signal: the functional basis of unreliable signals of strength in males of the two toned fiddler crab, Uca vomeris
... the fiddler crab is widespread, and given the importance of claw displays during signalling, and of underlying strength for combat success, it is important to understand how and why these unreliable signals ...
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The fiddler crab claw-waving display: an analysis of the structure and function of a movement-based visual signal
... The claw movements recorded for the seven species studied in chapter 3 indicate that displays tend to incorporate components with more than just one speed. This is best illustrated by the display of U. polita (Fig. ...
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Mechanisms of homing in the fiddler crab Uca rapax 2 Information sources and frame of reference for a path integration system
... sand fiddler crab ...within fiddler crabs may provide insights into the co- adaptation of fiddler crab navigational mechanisms and the behavioral requirements of their ...
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Sexual Differences in Foraging Behavior of Fiddler Crab, Uca sindensis (Decapoda: Ocypodidae)
... dimorphisms in terms of sexual selection and reproductive fitness, but far fewer have examined the effect of sexually selected dimorphisms on the non- reproductive aspects of animal life, for example, its effect on ...
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Relative growth of the fiddler crab, Uca sindensis(Crustacea: Ocypodidae) in a subtropical mangrove in Pohl Port, Iran
... of fiddler crabs (Aspey, 1978; Icely and Jones, 1978; Rabalais and Cameron, 1985; Ewa and Oboho, 1993; Thurman, 1998; Nobbs, 2003; Cesar et ...in fiddler crab is characteristic of sexuality and the ...
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The Role of Spermatheca in Ovarian Maturation of the Fiddler Crab, UCA TRIANGULARIS BENGALI (CRANE, 1975)
... The live specimens of fiddler crab Uca triangularis bengali (Crane,1975)were collected from the Pulicat lake of Tamilnadu.The specimens were collected by hand picking and also by digging the mud below up ...
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The spectral and temporal properties of fiddler crab photoreceptors in the context of predator avoidance
... the fiddler crab visual ...that fiddler crabs should have high temporal resolving power, in contrast to the low temporal resolution exhibited by animals that are nocturnal and sedentary (Ruck and ...
266
Impact of Endosulfan, Chlorpyrifos and Carbaryl Pesticides on fiddler crab, UCA triangularis
... water crab, Barytelphusa guerini. The freshwater female crab, Spiralothelphusa hydrodroma when exposed to textile dye industry effluent (TDIE) had reduced protein, carbohydrate and lipid levels in various ...
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Reproductive success and factors affecting sexual selection in a fiddler crab, Uca mjoebergi
... The first major theme of this thesis is to examine how variation in female preferences can explain the continued high level of variation in male traits. It is clear that different females can have different preferences ...
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PHARMACOLOGICALLY ACTIVE FATTY ACIDS OF FIDDLER CRAB Uca acuta acuta (Simpson)
... The fatty acid compositions of the body flesh, big chela flesh and hepatopancreas of the selected detritivore fiddler crab Uca acuta acuta (Simpson) have been studied by gas liquid chromatography and other ...
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Flicker is part of a multi cue response criterion in fiddler crab predator avoidance
... Predator avoidance behaviour costs time, energy and opportunities, and prey animals need to balance these costs with the risk of predation. The decisions necessary to strike this balance are often based on information ...
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Molecular evidence for color discrimination in the Atlantic sand fiddler crab, Uca pugilator
... brachyuran crab whose opsin gene sequence and spectral sensitivity are both known, Hemigrapsus sanguineus, has two MWS opsins, both with peak sensitivity around 480nm (Sakamoto et ...similar fiddler ...
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Evaluating the potential impact of bird predation on the SW Atlantic fiddler crab Leptuca uruguayensis
... The fiddler crab Leptuca uruguayensis (previously Uca uruguayensis) is a small (up to ...where fiddler crabs provide food for several species, including ruddy turnstones (Arenaria interpres), ...
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Study on LDH and Esterase Activity of Different Tissues in a Fiddler Crab U Ca Triangularis Bengali of Pulicat Lake Tamilnadu
... its maximum during high lipid mobilization , whereas in the ovary the maximum esterase activity coincides with active vitellogenesis . The accumulation of esterase within the oocytes is suggested to reflect their storage ...
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The variation of resolution and of ommatidial dimensions in the compound eyes of the fiddler crab Uca lactea annulipes (Ocypodidae, Brachyura, Decapoda)
... that views the horizon. In the Introduction, we have argued that this particular distribution of resolving power reflects the high information content of that part of the world. Most importantly, the horizon can be used ...
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High e vector acuity in the polarisation vision system of the fiddler crab Uca vomeris
... acuity, fiddler crabs are likely to rely on non-shape visual cues, such as motion, colour or polarisation, to identify and track approaching crabs and decide whether they are harmless neighbours or intruding ...
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Signals from ‘crabworld’: cuticular reflections in a fiddler crab colony
... Third, fiddler crab colonies are dynamic societies. Burrow ownership is hotly contested and male crabs especially are repeatedly challenged by neighbours or immigrants and may lose the resulting contests. ...
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The metabolic cost of carrying a sexually selected trait in the male fiddler crab Uca pugilator
... Male fiddler crabs of the genus Uca are ideal for addressing questions related to the cost of bearing a sexually selected ...male fiddler crabs possess one small claw and one extremely large claw that they ...
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Distribution, Population and Reproductive Biology of the Fiddler Crab Uca sindensis (Crustacea: Ocypodidae) in a Subtropical Mangrove of Pohl Area
... study indicated that the proportion of males having the right or left major cheliped did not significantly differ from an expected 1:1 ratio. Bezerra et al. (2007) suggested that proportion of right or left major ...
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Influence of salinity on the larval development of the fiddler crab Uca vocator (Ocypodidae) as an indicator of ontogenetic migration towards offshore waters
... of crab species with the larval ‘retention’ strategy are well adapted for development within their parental habitat where reduced and unstable salinities frequently occur ...
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