Anne Frijsinger & Mat Vestjens, Holland
Info
Xantho poressa (Olivi, 1792)
In order to investigate the relationships between zooplankton and phytoplankton in the diatom-dominated plankton communities of the northern Adriatic, feeding experiments with diatoms and Zoea I larvae of Xantho poressa were conducted.
In a laboratory set-up, Processa zoea were offered a mixture of diatom species similar to the communities observed during blooms that regularly occur in the northern Adriatic.
It is particularly noteworthy that Zoen larval grazing activity resulted in a decrease in the relative abundance of the toxic diatom Pseudon-itzschia calliantha.
For the colonial, flower-forming diatom Skeletonema marinoi, the results show a reduction in chain length in the presence of Zoea I larvae.
Of particular interest is the observation that the presence of larvae also resulted in increased growth rate and abundance of Skeletonema marinoi, which is similar to bloom induction by the presence of grazers.
Many crustaceans do not have such a good reputation for various reasons, but this example shows that marine crustaceans also have an important role to play.
Many species of the family Xanthidae can be poisonous, although they themselves have no poisonous apparatus (poisonous teeth, poisonous spines, poisonous glands in the skin), the consumption of these crustaceans can even be fatal for humans. Such animals are considered passive-poisonous.
The toxins of crabs (saxitoxin and tetrodotoxin) are produced by endobacteria and stored in the flesh of the crab, these e are highly potent and similar to the neurotoxins of puffer fish and just as deadly.
In its raw and cooked meat, consumption of the crab meat is toxic to humans!
Please be sure to clarify whether the meat of these crabs is toxic or non-toxic before eating it!
Call an emergency doctor immediately at the first signs of poisoning (e.g. breathing problems, muscle cramps)!
The good news is there’s no way you can be exposed to these toxins if you don’t try to eat these crabs – a bite or a jab isn’t going to do the job.
The bad news for those who unwittingly consume these crabs is that cooking the meat isn’t going to make the toxins any less effective.
Fortunately, toxic crabs don’t want to be eaten just as much as we shouldn’t be eating them, so they help us out with their glorious warning colours.
Synonyms:
Cancer levifrons Rafinesque, 1814
Cancer poressa Olivi, 1792
Cancer tinctor Fabricius, 1798
Xantho rivulosa Risso, 1827
Xantho rivulosus Risso, 1827
In order to investigate the relationships between zooplankton and phytoplankton in the diatom-dominated plankton communities of the northern Adriatic, feeding experiments with diatoms and Zoea I larvae of Xantho poressa were conducted.
In a laboratory set-up, Processa zoea were offered a mixture of diatom species similar to the communities observed during blooms that regularly occur in the northern Adriatic.
It is particularly noteworthy that Zoen larval grazing activity resulted in a decrease in the relative abundance of the toxic diatom Pseudon-itzschia calliantha.
For the colonial, flower-forming diatom Skeletonema marinoi, the results show a reduction in chain length in the presence of Zoea I larvae.
Of particular interest is the observation that the presence of larvae also resulted in increased growth rate and abundance of Skeletonema marinoi, which is similar to bloom induction by the presence of grazers.
Many crustaceans do not have such a good reputation for various reasons, but this example shows that marine crustaceans also have an important role to play.
Many species of the family Xanthidae can be poisonous, although they themselves have no poisonous apparatus (poisonous teeth, poisonous spines, poisonous glands in the skin), the consumption of these crustaceans can even be fatal for humans. Such animals are considered passive-poisonous.
The toxins of crabs (saxitoxin and tetrodotoxin) are produced by endobacteria and stored in the flesh of the crab, these e are highly potent and similar to the neurotoxins of puffer fish and just as deadly.
In its raw and cooked meat, consumption of the crab meat is toxic to humans!
Please be sure to clarify whether the meat of these crabs is toxic or non-toxic before eating it!
Call an emergency doctor immediately at the first signs of poisoning (e.g. breathing problems, muscle cramps)!
The good news is there’s no way you can be exposed to these toxins if you don’t try to eat these crabs – a bite or a jab isn’t going to do the job.
The bad news for those who unwittingly consume these crabs is that cooking the meat isn’t going to make the toxins any less effective.
Fortunately, toxic crabs don’t want to be eaten just as much as we shouldn’t be eating them, so they help us out with their glorious warning colours.
Synonyms:
Cancer levifrons Rafinesque, 1814
Cancer poressa Olivi, 1792
Cancer tinctor Fabricius, 1798
Xantho rivulosa Risso, 1827
Xantho rivulosus Risso, 1827
