Nectonema (Nematomorpha: Nectonematoidea) a parasite of decapod Crustacea in the Bay of Fundy

1981 ◽  
Vol 59 (6) ◽  
pp. 1193-1196 ◽  
Author(s):  
H. A. Leslie ◽  
A. Campbell ◽  
G. R. Daborn
Keyword(s):  
Hermit Crab ◽  
Hermit Crabs ◽  
Bay Of Fundy ◽  
Internal Organs ◽  
Cancer Irroratus ◽  
Parasitic Castration ◽  
Decapod Crustacea ◽  
Rock Crab ◽  
Juvenile Stages

Juvenile stages of the marine nematomorph genus Nectonema were found in the rock crab, Cancer irroratus, jonah crab, C. borealis, hermit crab, Pagurus acadianus, and the shrimps, Pandalus montagui and P. borealis, in the Bay of Fundy. No effects on the internal organs of most parasitized hosts could be detected although some male rock crabs had atrophied gonads suggesting parasitic castration by Nectonema. In the area of highest parasite incidence 48% of the rock crabs and 11.6% of the hermit crabs sampled were parasitized with Nectonema. Taxonomic work with the genus Nectonema is needed.

Some Estimates of Population Density and Feeding Habits of the Rock Crab, Cancer irroratus, in a Kelp Bed in Nova Scotia

1982 ◽  
Vol 39 (4) ◽  
pp. 636-639 ◽  
Author(s):  
N. C. Drummond-Davis ◽  
K. H. Mann ◽  
R. A. Pottle
Keyword(s):  
Nova Scotia ◽  
Population Density ◽  
Sea Urchins ◽  
Feeding Habits ◽  
Atlantic Coast ◽  
Carapace Width ◽  
Hermit Crabs ◽  
Cancer Irroratus ◽  
Kelp Bed ◽  
Rock Crab

The population density of rock crabs (Cancer irroratus) in a kelp bed on the Atlantic coast of Nova Scotia was examined by mark–recapture techniques and found to be about one crab (> 45-mm carapace width) per 2 square metres. Prey taken by the crabs included hermit crabs (Pagurus), mussels (Mytilus), sea urchins (Strongylocentrotus), and various small crustaceans and polychaetes. It was concluded that the crab population would exert a strong predation pressure on these invertebrates.Key words: Cancer irroratus, rock crabs, predation, population density, kelp

Metopelloides paguri sp. nov., a new species of symbiotic stenothoid amphipod (Crustacea: Amphipoda: Stenothoidae) associated with sublittoral hermit crabs from the Russian coasts of the Sea of Japan

Zootaxa ◽  
2012 ◽  
Vol 3244 (1) ◽  
pp. 59 ◽  
Author(s):  
IVAN MARIN ◽  
SERGEY SINELNIKOV
Keyword(s):  
New Species ◽  
Sea Of Japan ◽  
Hermit Crab ◽  
Hermit Crabs ◽  
The Sea Of Japan ◽  
Crab Species ◽  
Body Coloration ◽  
The Family ◽  
Mandibular Palp ◽  
A New Species

A new species of amphipod from the genus Metopelloides Gurjanova, 1938 (Crustacea: Amphipoda: Stenothoidae) asso-ciated with two species of sublittoral hermit crab species, Pagurus pectinatus (Stimpson, 1858) and Elassochirus cavi-manus (Miers, 1879) (Crustacea: Decapoda: Paguridae), is described from the Russian coasts of the Sea of Japan. The newspecies clearly differs from the congeners by the combination of morphological features such as telson without lateralspines, an elongated mandibular palp with single apical setae, the structures of distoventral palmar margins of subchelaon gnathopods I and II in females, bright white-red body coloration. Thus, the record of Metopelloides paguri sp. nov.represents the second record of the family Stenothoidae in the association with sublittoral hermit crabs from the Sea of Japan.

Mating Behavior of the Rock Crab, Cancer irroratus

1978 ◽  
Vol 35 (10) ◽  
pp. 1385-1388 ◽  
Author(s):  
R. W. Elner ◽  
A. B. Stasko
Keyword(s):  
Key Words ◽  
Mating Behavior ◽  
Cancer Irroratus ◽  
Rock Crab ◽  
Laboratory Tank

A pair of rock crabs, Cancer irroratus, in mating embrace an hour after being placed in a laboratory tank, was observed intermittently until ecdysis of the female and copulation of the pair, and then until escape of the female 27 d after ecdysis. When separated from the mating embrace, the hard-shelled female sought out the male. Approach of female ecdysis was indicated by protrusion of a soft spherical bulge at the rear of the epimeral line. Details of the immediate pre- and postcopulatory behavior were observed continuously from 26 min before to 150 min after copulation. The female was first noted separated from the male 7 h after copulation. Periods of separation increased until mating interactions were completely abandoned 5 d after copulation. A second pair subsequently observed confirmed the above. Mating embrace was also observed between a hard-shelled male and a hard-shelled female that already had sperm plugs. Key words: Crustacea, crabs, copulation, molt indicators

Coenobichnus currani (new ichnogenus and ichnospecies): Fossil trackway of a land hermit crab, early Holocene, San Salvador, Bahamas

2003 ◽  
Vol 77 (3) ◽  
pp. 576-582 ◽  
Author(s):  
Sally E. Walker ◽  
Steven M. Holland ◽  
Lisa Gardiner
Keyword(s):  
Hermit Crab ◽  
Fossil Record ◽  
Trace Fossil ◽  
Early Holocene ◽  
Hermit Crabs ◽  
Coastal Environments ◽  
Atlantic Region ◽  
Western Atlantic ◽  
San Salvador ◽  
Left And Right

Land hermit crabs (Coenobitidae) are widespread and abundant in Recent tropical and subtropical coastal environments, yet little is known about their fossil record. A walking trace, attributed to a land hermit crab, is described herein as Coenobichnus currani (new ichnogenus and ichnospecies). This trace fossil occurs in an early Holocene eolianite deposit on the island of San Salvador, Bahamas. The fossil trackway retains the distinctive right and left asymmetry and interior drag trace that are diagnostic of modern land hermit crab walking traces. The overall size, dimensions and shape of the fossil trackway are similar to those produced by the modem land hermit crab, Coenobita clypeatus, which occurs in the tropical western Atlantic region. The trackway was compared to other arthropod traces, but it was found to be distinct among the arthropod traces described from dune or other environments. The new ichnogenus Coenobichnus is proposed to accommodate the asymmetry of the trackway demarcated by left and right tracks. The new ichnospecies Coenobichnus currani is proposed to accommodate the form of the proposed Coenobichnus that has a shell drag trace.

Hermit Crabs as Emergent Icons of Global Waste Epidemic and Their Unreal Estate Housing Struggles

2019 ◽  
Vol 27 (7) ◽  
pp. 697-715
Author(s):  
Concepción Cortés Zulueta
Keyword(s):  
Hermit Crab ◽  
Polar Bear ◽  
Companion Animals ◽  
Hermit Crabs ◽  
Wild Animals ◽  
Housing Crisis ◽  
Glass Bottle ◽  
Human Waste

AbstractA hermit crab housed in a broken glass bottle or inside a plastic cap is becoming like a polar bear stranded on a tiny, melting iceberg: those pictures are emergent icons of the plight faced by oceans and creatures, caused by human waste excesses and wrongdoings. These inventive crustaceans fulfill a warning role akin to charismatic megafauna, and induce empathy with varied sources, dominated by human projections like the housing crisis metaphor. Crabs emerge like a cluster where many opposed notions collapse, while they stage the frictions of a complex, fractured balance. They are wild animals, and controversial companion animals, and when they live inside human trash, they show resilience that questions the natural-artificial divide. Simultaneously, they remind humans of strains imposed upon them, the oceans, and the planet, becoming tokens of the unbalances with which humans have to deal in their often-misguided attempts to fix the things they are rupturing.

scholarly journals Microplastics disrupt hermit crab shell selection

2020 ◽  
Vol 16 (4) ◽  
pp. 20200030 ◽  
Author(s):  
Andrew Crump ◽  
Charlotte Mullens ◽  
Emily J. Bethell ◽  
Eoghan M. Cunningham ◽  
Gareth Arnott
Keyword(s):  
Hermit Crab ◽  
Information Gathering ◽  
Animal Behaviour ◽  
Hermit Crabs ◽  
Marine Biodiversity ◽  
Crab Shell ◽  
Potential Threat ◽  
Pagurus Bernhardus

Microplastics (plastics < 5 mm) are a potential threat to marine biodiversity. However, the effects of microplastic pollution on animal behaviour and cognition are poorly understood. We used shell selection in common European hermit crabs ( Pagurus bernhardus ) as a model to test whether microplastic exposure impacts the essential survival behaviours of contacting, investigating and entering an optimal shell. We kept 64 female hermit crabs in tanks containing either polyethylene spheres ( n = 35) or no plastic ( n = 29) for 5 days. We then transferred subjects into suboptimal shells and placed them in an observation tank with an optimal alternative shell. Plastic-exposed hermit crabs showed impaired shell selection: they were less likely than controls to contact optimal shells or enter them. They also took longer to contact and enter the optimal shell. Plastic exposure did not affect time spent investigating the optimal shell. These results indicate that microplastics impair cognition (information-gathering and processing), disrupting an essential survival behaviour in hermit crabs.

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