Castration and mortality in Pisaster ochraceus parasitized by Orchitophrya stellarum (Ciliophora)
نویسندگان
چکیده
منابع مشابه
Conservation of sequence in the internal transcribed spacers and 5.8S ribosomal RNA among geographically separated isolates of parasitic scuticociliates (Ciliophora, Orchitophryidae).
Nucleotide sequence from the internal transcribed spacers (ITS1 and ITS2) and the 5.8S gene from the ribosomal RNA gene cluster of isolates of the scuticociliate Orchitophrya stellarum from 4 asteroid hosts were compared. Surprisingly, these data (495 bp) were identical for O. stellarum isolated from the testes of Asterias amurensis from Japan; Pisaster ochraceus from British Columbia, Canada; ...
متن کاملIntertidal sea stars (Pisaster ochraceus) alter body shape in response to wave action.
Sea stars are some of the largest mobile animals able to live in the harsh flow environment of wave-exposed, rocky intertidal shores. In addition, some species, such as the northeastern Pacific Pisaster ochraceus, are ecologically significant predators in a broad range of environments, from sheltered lagoons to the most wave-exposed shorelines. How they function and survive under such an extrem...
متن کاملColor polymorphism and genetic structure in the sea star Pisaster ochraceus.
The sea star Pisaster ochraceus is one of the more striking species on the rocky shores of the Northeast Pacific, in part due to the dramatic color polymorphism of the adults. Along the open Pacific coast, Pisaster populations are 6%-28% orange, with a small percentage of brilliant purple stars and a large percentage of reddish-brown to dull purple ones. However, populations in the San Juan Isl...
متن کاملThe influence of intertidal location and temperature on the metabolic cost of emersion in Pisaster ochraceus
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t a r t i c l e i n f o Vertical zonation within the intertidal results from an interaction between the physic...
متن کاملA Dynamic Energy Budget (DEB) Model for the Keystone Predator Pisaster ochraceus
We present a Dynamic Energy Budget (DEB) model for the quintessential keystone predator, the rocky-intertidal sea star Pisaster ochraceus. Based on first principles, DEB theory is used to illuminate underlying physiological processes (maintenance, growth, development, and reproduction), thus providing a framework to predict individual-level responses to environmental change. We parameterized th...
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ژورنال
عنوان ژورنال: Diseases of Aquatic Organisms
سال: 1991
ISSN: 0177-5103,1616-1580
DOI: 10.3354/dao010071