Predation of portunid crabs Callinectes sapidus and Callinectes ornatus (Crustacea, Decapoda) on the medusa Lychnorhiza lucerna (Cnidaria, Scyphozoa)
نویسندگان
چکیده
منابع مشابه
Concentration of rotavirus and enteroviruses from blue crabs (Callinectes sapidus).
A simple method for concentration and detection of rotavirus and enteroviruses in the blue crab is described. Virus was separated from tissue homogenates at pH 9.5, concentrated by adsorption to protein precipitates at pH 3.5, and recovered by elution of precipitates at pH 9.2. Test samples of 12 to 15 ml were produced from an initial 100 g of crab tissues. Cat-floc precipitation was used to re...
متن کاملOntogenetic distribution of Callinectes ornatus (Decapoda, Portunoidea) in southeastern Brazil Distribución ontogenética de Callinectes ornatus (Decapoda, Portunoidea) en el sureste de Brasil
The spatial and seasonal distribution of different demographic groups of the swimming crab Callinectes ornatus was analyzed with respect to its population biology in three bays (Ubatumirim, Ubatuba, and Mar Virado) in southeastern Brazil. In each bay, monthly sampling was performed during two years along six transects, established at 5, 10, 15, and 20 m depth (parallel to the beach line), in a ...
متن کاملThe effect of salinity on experimental infections of a Hematodinium sp. in blue crabs, Callinectes sapidus.
The parasitic dinoflagellate Hematodinium sp. parasitizes blue crabs along the Atlantic seaboard of the United States. Infections in blue crabs have only been reported from waters where salinity is >11 practical salinity units (psu). Blue crabs maintain a hyperosmotic internal concentration at low salinities (0-5 psu), roughly comparable to 24 psu, and should be capable of maintaining an infect...
متن کاملMechanical properties of the rigid and hydrostatic skeletons of molting blue crabs, Callinectes sapidus Rathbun.
Molting in crustaceans involves significant changes in the structure and function of the exoskeleton as the old cuticle is shed and a new one is secreted. The flimsy new cuticle takes several days to harden and during this time crabs rely on a hydrostatic skeletal support system for support and movement. This change from a rigid to a hydrostatic skeletal support mechanism implies correlated cha...
متن کاملOesophageal chemoreceptors of blue crabs, Callinectes sapidus, sense chemical deterrents and can block ingestion of food.
Decapod crustaceans such as blue crabs possess a variety of chemoreceptors that control different stages of the feeding process. All these chemoreceptors are putative targets for feeding deterrents that cause animals to avoid or reject otherwise palatable food. As a first step towards characterizing the chemoreceptors that mediate the effect of deterrents, we used a behavioral approach to inves...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Ocean and Coastal Research
سال: 2021
ISSN: 2675-2824
DOI: 10.1590/2675-2824069.20-323tlv