Penaeid Crustaceans with the Asymmetrical Petasma

Parasitic crustaceans as vectors of viruses, with an emphasis on three penaeid viruses.

Parasitic crustaceans serve as both hosts and vectors of viruses as well as of parasites and other microbial pathogenic agents. Few of the presumably numerous associations are known, but many can be anticipated. Recently, branchiurans and gnathiid isopods have been documented to host helminths and blood parasites. Because the agents can be observed readily with a microscope, these are better re...

Crustaceans

between species, but between different segments on the same animal. They have limbs specially adapted for walking, eating, grooming, swimming, mating, sensing the surrounding environment, brooding young, spearing prey, scraping surfaces and even snapping to make noise. Lobsters provide a good example of the limb diversity that can exist on even a single individual — the thoracic and abdominal a...

The Doubling Map with Asymmetrical Holes

Let 0 < a < b < 1 and let T be the doubling map. Set J (a, b) := {x ∈ [0, 1] : Tx / ∈ (a, b), n ≥ 0}. In this paper we completely characterize the holes (a, b) for which any of the following scenarios holds: (i) J (a, b) contains a point x ∈ (0, 1); (ii) J (a, b) ∩ [δ, 1− δ] is infinite for any fixed δ > 0; (iii) J (a, b) is uncountable of zero Hausdorff dimension; (iv) J (a, b) is of positive ...

Asymmetrical Interactions and Asymmetrical Constraints

The three approaches to too-many-solutions problems discussed in the previous chapter do not treat them as symptomatic of significant generalizations about input-output mappings rather than outputs. Because this systematic challenge to OT is not recognized, previous attacks on these problems, apart from de Lacy's general proposal, see them as an assortment of individual difficult cases and anal...

The Decapod Crustaceans of Iowa