Behavioural responses of the mangrove fiddler crabs (Uca annulipes and U. inversa) to urban sewage loadings: Results of a mesocosm approach

2009 ◽  
Vol 58 (12) ◽  
pp. 1860-1867 ◽  
Author(s):  
Fabrizio Bartolini ◽  
Gil Penha-Lopes ◽  
Samwel Limbu ◽  
José Paula ◽  
Stefano Cannicci
Keyword(s):  
Fiddler Crabs ◽  
Behavioural Responses ◽  
Urban Sewage ◽  
Uca Annulipes

scholarly journals IDENTIFIKASI JENIS KEPITING BIOLA DI HUTAN MANGROVE DUSUN SETINGGA ASINDESA SEBUBUS KECAMATAN PALOH KABUPATEN SAMBAS

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Edy Kurniawan ◽  
M Sofwan Anwari ◽  
M Dirhamsyah
Keyword(s):  
Sampling Method ◽  
Fiddler Crab ◽  
Sandy Beaches ◽  
Mangrove Forests ◽  
Crab Species ◽  
Fiddler Crabs ◽  
Purposive Sampling ◽  
Plot Size ◽  
Uca Annulipes

The fiddler crab is also known as the kepiting biola is an animal that has broad legs that belong to the Crustacean class. Fiddler crab is a type of crab that has a habitat in intertidal areas, especially around mangrove forests and sandy beaches. This study aims to examine the identification of fiddler crab species found in the Mangrove Sebubus. The method used in this research is purposive sampling method with the use of a square plot size of 1 x 1 meter as many as 30 pieces in 3 research lines. The results showed as many as 7 species of fiddler crabs found there, that is Uca annulipes, Uca rosea, Uca forcipata, Uca bellator, Uca tetragonon, Uca paradussumieri, and Uca acuta.Keywords: Identification, Fiddler Crab, Mangrove Sebubus

Sex and size affecting time allocations for activities in Uca annulipes (H. Milne Edwards, 1837)

Crustaceana ◽  
2016 ◽  
Vol 89 (6-7) ◽  
pp. 759-773 ◽  
Author(s):  
Fahmida Wazed Tina ◽  
Mullica Jaroensutasinee ◽  
Krisanadej Jaroensutasinee
Keyword(s):  
Body Size ◽  
Female Body ◽  
Feeding Rate ◽  
Small Male ◽  
Fiddler Crabs ◽  
Male And Female ◽  
Negatively Associated ◽  
Female Body Size ◽  
Uca Annulipes

We investigated the amount of time that large and small, male and female fiddler crabsUca annulipes(H. Milne Edwards, 1837) spent on feeding, walking, standing, grooming, burrowing, inside burrows, fighting, and courtship waving. We video-recorded the activities of 45 males (22 small and 23 large), and 39 females (19 small and 20 large) each for 5 min, and calculated the percentage of time spent on each activity/crab. Our results showed that both sexes spent more time on feeding than on other activities. Males spent more time on building burrows, walking, and grooming than females, and females spent more time inside burrows than males. Smaller males spent more time on feeding, and less time on building burrows and on waving than larger ones. There were no relations between female body size and activities. Feeding rate/feeding claw was higher in males than in females, and crab body size was negatively associated with feeding rate/min.

scholarly journals Does male reproductive effort increase with age? Courtship in fiddler crabs

2013 ◽  
Vol 9 (2) ◽  
pp. 20121078 ◽  
Author(s):  
Catherine L. Hayes ◽  
Isobel Booksmythe ◽  
Michael D. Jennions ◽  
Patricia R. Y. Backwell
Keyword(s):  
Egg Size ◽  
Reproductive Effort ◽  
Female Preference ◽  
Age Dependence ◽  
Experimental Protocol ◽  
Fiddler Crabs ◽  
Age Dependent ◽  
Uca Annulipes ◽  
Female Presence ◽  
Male Reproductive Effort

Theory suggests that reproductive effort generally increases with age, but life-history models indicate that other outcomes are possible. Empirical data are needed to quantify variation in actual age-dependence. Data are readily attainable for females (e.g. clutch per egg size), but not for males (e.g. courtship effort). To quantify male effort one must: (i) experimentally control for potential age-dependent changes in female presence; and, crucially, (ii) distinguish between the likelihood of courtship being initiated, the display rate, and the total time invested in courting before stopping (‘courtship persistence’). We provide a simple experimental protocol, suitable for many taxa, to illustrate how to obtain this information. We studied courtship waving by male fiddler crabs, Uca annulipes . Given indeterminate growth, body size is correlated with age. Larger males were more likely to wave at females and waved more persistently. They did not, however, have a higher courtship rate (waves per second). A known female preference for males with higher display rates explains why, once waving is initiated, all males display at the same rate.

High motivation enables smaller contestants to win the contests in fiddler crabs (Brachyura, Ocypodidae)

Crustaceana ◽  
2017 ◽  
Vol 90 (11-12) ◽  
pp. 1473-1481
Author(s):  
Fahmida Wazed Tina ◽  
Mullica Jaroensutasinee ◽  
Krisanadej Jaroensutasinee
Keyword(s):  
Body Size ◽  
Fiddler Crabs ◽  
Fighting Ability ◽  
Uca Annulipes ◽  
High Motivation ◽  
Short Time ◽  
Male Contests

We observed the outcomes of fights of smaller contestants against larger opponents during male-male contests in Uca annulipes (H. Milne Edwards, 1837), Uca bengali Crane, 1975, and Uca rosea (Tweedie, 1937). Smaller contestants won 30, 31 and 37% of the contests in U. annulipes, U. bengali and U. rosea, respectively, regardless of body size disadvantages. Smaller contestants won when body size asymmetries were lesser, but took a longer time to win the contests, while with greater size-asymmetries, smaller ones lost the contests in a short time. In U. bengali and U. rosea, most of the smaller winners were residents (burrow owners), but not in U. annulipes. This study shows that longer fighting duration or high motivation enables the smaller contestants, especially the residents, to overcome their inferior fighting ability and win contests against larger opponents.

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