Results 121 to 130 of about 1,979 (178)

Multiple origins of subsociality in crab spiders (Thomisidae)

Molecular Phylogenetics and Evolution, 2015
Determining factors that facilitate the transition from a solitary to a social lifestyle is a major challenge in evolutionary biology, especially in taxa that are usually aggressive towards conspecifics. Most spiders live solitarily and few species are known to be social.
Jasmin, Ruch, Torben, Riehl, Laura J, May-Collado, Ingi, Agnarsson   +3 more
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Behaviour of Spider Crabs in the Presence of Octopuses

Nature, 1953
AT La Rocque, in Jersey, the spring tides go out about two miles leaving many large lagoons with sandy bottoms and depths of from two to four feet of water. Here we often spear flat-fish, plaice, soles, etc., sometimes getting as many as twenty in a tide; here also may be found spider crabs (Maia squinado), which are often taken in Jersey for food, but
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THE BIOLOGY OF MANX SPIDER CRABS

Proceedings of the Zoological Society of London, 1963
The biology of the fourteen species of spider crabs occurring in the Isle of Man area was investigated, particular attention being given to their distribution, food, moulting cycle and breeding. The distribution of a species is related to the type of bottom deposit, and members of a genus have complementary distributions.
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Penetration of the oocyte envelope by spermatozoa in the spider crab

Journal of Ultrastructure Research, 1971
The oocyte of the spider crab Libinia emarginata possesses a two-layered envelope. This forms in the ovary between the oocyte and its surrounding follicle cells. Eggs collected at oviposition as they leave the body of the females have several sperms penetrating this envelope. Penetration apparently is the result of lysis by acrosomal materials.
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CRAB SPIDERS' TRICKS FOR YELLOW CAMOUFLAGE

Journal of Experimental Biology, 2013
Chameleons and octopuses may be famed for their extraordinary camouflage skills, but this ability is not unique and many animals, big and small, can match their surroundings. Perhaps one of the smallest is the tiny crab spider, Thomisus onustus , which measure between 1 and 10 mm.
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UV and Camouflage in Crab Spiders (Thomisidae)

2012
Crab spiders are formidable predators of many insects. Their colour is particularly fascinating and we have an excellent account of the foraging ecology of some species. A more recent research focus has been the prevalence of UV reflection in some crab spider species.
Marie E. Herberstein, Felipe M. Gawryszewski   +1 more
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Resource Underutilization in a Spider Crab Industry

Fisheries, 1977
Abstract Underutilization in a spider crab fishery was large with respect to 1974 landings of 3300 metric tons (t). Potentially 1600 t were lost by not fishing all commercial stocks; at least 264 t were discarded in plants because they were too small, soft-shelled, or dead; an additional unmeasured quantity of small and soft-shelled crabs was discarded
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Family Majidae Samouelle, 1819 (Spider Crabs, Decorator Crabs)

2017
Carapace subquadrate, subcircular to pyriform. Rostrum usually with two spines. Orbits complete with supraorbital eave and postorbital spine, but not closed; eyestalks long, movable in orbits. Antennules folded longitudinally. Antennae with elongated basal antennal segment, usually produced on anterolateral angle.
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COMMENSAL ASSOCIATION OF A SPIDER CRAB AND A MEDUSA

The Biological Bulletin, 1927
During four successive years the writer was associated with a week-end biotal survey of the coast of South Carolina, and on two of these field studies encountered a curious commensal re lationship between a spider crab and a medusa. The animals con cerned were Libinia dubia Milne-Edwards and Stontolophus niele agris L.
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