Growth and exuvial loss during larval and early juvenile development of the hermit crab Pagurus bernhardus reared in the laboratory

1989 ◽  
Vol 103 (4) ◽  
pp. 503-511 ◽  
Author(s):  
K. Anger
Keyword(s):  
Hermit Crab ◽  
Early Juvenile ◽  
Pagurus Bernhardus ◽  
Juvenile Development

Shell selection in the hermit crab Pagurus bernhardus

1976 ◽  
Vol 35 (4) ◽  
pp. 335-343 ◽  
Author(s):  
K. A. Mitchell
Keyword(s):  
Hermit Crab ◽  
Pagurus Bernhardus

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.

scholarly journals Decapodid and early juvenile development in the protandrous shrimp Campylonotus vagans (Crustacea: Decapoda: Caridea), with notes on larval morphology

2003 ◽  
Vol 83 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Sven Thatje ◽  
Gustavo A. Lovrich
Keyword(s):  
Low Temperatures ◽  
Juvenile Stage ◽  
Tierra Del Fuego ◽  
Caridean Shrimp ◽  
Early Juvenile ◽  
Morphological Variations ◽  
Sexual Determination ◽  
Juvenile Stages ◽  
Two Stages ◽  
Juvenile Development

The decapodid and first two juvenile stages of the caridean shrimp Campylonotus vagans from the Subantarctic Beagle Channel (Tierra del Fuego, Argentina) are described and illustrated in detail. The complete larval and early juvenile development of this species from rearings under controlled laboratory conditions were analysed. Zoeal morphology in two stages of an abbreviated development was identical to a description from plankton and hatched larvae of a previous work, and therefore we only compare and discuss slight morphological variations in this study. The first juvenile is large and already resembles some features of adults, lacking all ventral rostral and the fourth dorsal rostral spine only which appears in the following stage, and the second pereiopod not yet being as predominant as in adults. Sexual determination is not yet possible up to the described second juvenile stage. The abbreviated larval development in a Subantarctic shrimp species is discussed as an adaptation to low temperatures and pronounced seasonality.

scholarly journals The Most Extreme Sexual Size Dimorphism among Birds: Allometry, Selection, and Early Juvenile Development in the Great Bustard (Otis tarda)

The Auk ◽  
2009 ◽  
Vol 126 (3) ◽  
pp. 657-665 ◽  
Author(s):  
Juan C. Alonso ◽  
Marina Magaña ◽  
Javier A. Alonso ◽  
Carlos Palacín ◽  
Carlos A. Martín ◽  
...  
Keyword(s):  
Sexual Size Dimorphism ◽  
Great Bustard ◽  
Size Dimorphism ◽  
Otis Tarda ◽  
Early Juvenile ◽  
Juvenile Development

The costs of bearing arms and armour in the hermit crab Pagurus bernhardus

2010 ◽  
Vol 80 (4) ◽  
pp. 637-642 ◽  
Author(s):  
S. Doake ◽  
M. Scantlebury ◽  
R.W. Elwood
Keyword(s):  
Hermit Crab ◽  
Pagurus Bernhardus

Influences on movement and migration in the hermit crab Pagurus bernhardus

1990 ◽  
Vol 70 (3) ◽  
pp. 483-491 ◽  
Author(s):  
I. Lancaster ◽  
G.D. Wigham
Keyword(s):  
Population Dynamics ◽  
Hermit Crab ◽  
Movement Patterns ◽  
Hermit Crabs ◽  
Residence Times ◽  
South West ◽  
Pagurus Bernhardus ◽  
And Migration ◽  
South West England

Dispersion in a littoral population of Pagurus bernhardus in south-west England is shown to be random, with members demonstrating no evidence of site attachment. Movement patterns within the population are shown to be asynchronous and random, and to be dictated by the quantity and quality of each individual's shell contacts. These, in turn, affect the time that individuals spend within the habitat. This implies that population dynamics and residence times are so influenced by the availability of suitable empty gastropod shells that movement and migration in hermit crabs should be regarded as resource-dependent phenomena.

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