Spontaneous alternation and locomotor activity in three species of marine crabs: Green crab (Carcinus maenas), blue crab (Callinectes sapidus), and fiddler crab (Uca pugnax).

2014 ◽  
Vol 128 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Fuat Balcı ◽  
Patricia A. Ramey-Balcı ◽  
Perrine Ruamps
Keyword(s):  
Locomotor Activity ◽  
Blue Crab ◽  
Spontaneous Alternation ◽  
Fiddler Crab ◽  
Callinectes Sapidus ◽  
Carcinus Maenas ◽  
Green Crab ◽  
Uca Pugnax

Differences in the Use of Cheliped Autotomy by the Mud Fiddler Crab Uca Pugnax (Smith, 1870) (Decapoda, Ocypodidae) When Escaping Predation by the Blue Crab Callinectes Sapidus (Rathbun, 1896)

Crustaceana ◽  
2011 ◽  
Vol 84 (11) ◽  
pp. 1281-1293 ◽  
Author(s):  
M. C. Curran ◽  
M. M. Mace III
Keyword(s):  
Blue Crab ◽  
Visual Stimulus ◽  
Fiddler Crab ◽  
Callinectes Sapidus ◽  
Large Male ◽  
Effective Strategy ◽  
Uca Pugnax ◽  
Fiddler Crabs ◽  
Significant Difference ◽  
Major Cheliped

AbstractAutotomy of limbs has been observed for a variety of organisms and in some taxa has been shown to be an effective strategy for escaping predation. We investigated differences in the use of cheliped autotomy by small and large male fiddler crabs during predation events, and also assessed if autotomy of the major cheliped allowed male fiddler crabs to escape predation more often than females. The blue crab Callinectes sapidus was presented with 5 small and 5 large male mud fiddler crabs Uca pugnax (n = 60), and in a second experiment, 5 male and 5 female U. pugnax were presented to C. sapidus (n = 60). Large U. pugnax autotomized their major cheliped more often and survived compared to small U. pugnax (n = 22 pools, S = 96.5, p < 0.0001), although this difference was not significant when adjusted for the total number of attacks on each size (n = 22 pools, S = 45, p = 0.1467). There was no significant difference (n = 29 pools, S = 30.5, p = 0.4988) between the total number of unsuccessful attacks on male versus female U. pugnax. At least half of the males autotomized their major cheliped in unsuccessful attacks during the first (69%) and second (53%) experiments. The major cheliped of male U. pugnax is a prominent visual stimulus that may have initially attracted C. sapidus to this prey; however, autotomization potentially enabled male fiddler crabs to escape predation in over half of all unsuccessful attacks.

scholarly journals Color-specific porosity in double pigmented natural 3d-nanoarchitectures of blue crab shell

2019 ◽  
Author(s):  
Fran Nekvapil ◽  
Simona Cintă Pinzaru ◽  
Lucian Barbu–Tudoran ◽  
Maria Suciu ◽  
Branko Glamuzina ◽  
...  
Keyword(s):  
Blue Crab ◽  
Real World ◽  
Shell Structure ◽  
Slow Release ◽  
Callinectes Sapidus ◽  
Green Crab ◽  
Blue Pigment ◽  
Crab Shell ◽  
Real World Applications ◽  
20 Nm

Abstract3D-engineered nanoarchitectures with various functionalities are still difficult to obtain and translate for real-world applications. However, such nanomaterials are naturally abundant and yet wasted, but could trigger huge interest for blue bioeconomy, provided that our understanding of their ultrastructure-function is achieved. To date, the Bouligand pattern in crustaceans shell structure is believed to be unique. Here we demonstrated that in blue crab Callinectes sapidus, the 3D-nanoarchitecture is color-specific, while the blue and red-orange pigments interplay in different nano-sized channels and pores. Thinnest pores of about 20 nm are found in blue shell. Additionally, the blue pigment co-existence in specific Bouligand structure is proved for the green crab Carcinus aestuarii, although the crab does not appear blue. The pigments interplay, simultaneously detected in color-specific, native crab shells overturns our understanding in crustaceans coloration and may trigger the selective use of particular colored natural nanoarchitectures for biomolecular loading and slow release, infectious barriers, bioremediation, translational diffusivity and many others.

Intracellular Acid-Base Regulation during Recovery from Locomotor Activity in the Blue Crab (Callinectes sapidus)

1989 ◽  
Vol 62 (3) ◽  
pp. 621-638 ◽  
Author(s):  
C. Louise Milligan ◽  
Patrick J. Walsh ◽  
Charles E. Booth ◽  
D. Gordon McDonald
Keyword(s):  
Locomotor Activity ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Acid Base ◽  
Intracellular Acid

Foraging behavior of an estuarine predator, the blue crab Callinectes sapidus in a patchy environment

Ecography ◽  
2000 ◽  
Vol 23 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Mary E. Clark ◽  
Thomas G. Wolcott ◽  
Donna L. Wolcott ◽  
Anson H. Hines
Keyword(s):  
Foraging Behavior ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Patchy Environment

Linking eelgrass decline and impacts on associated fish communities to European green crab Carcinus maenas invasion

2016 ◽  
Vol 548 ◽  
pp. 31-45 ◽  
Author(s):  
K Matheson ◽  
CH McKenzie ◽  
RS Gregory ◽  
DA Robichaud ◽  
IR Bradbury ◽  
...  
Keyword(s):  
Carcinus Maenas ◽  
Fish Communities ◽  
Green Crab ◽  
European Green Crab
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