José María Orensanz

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We conducted a comprehensive survey of existing knowledge about exotic marine organisms introduced to the southwestern Atlantic Ocean, including coastal and shelf areas of Uruguay and Argentina. This domain is equivalent to the so-called Patagonian Shelf Large Marine Ecosystem, and corresponds to two biogeographic provinces: warm-temperate (Argentine(More)
We report the finding of the European green crab on the Atlantic coast of Patagonia. A total of 61 specimens were found in Camarones bay (Chubut Province, Argentina) in November 2003 and January 2004. Carapace widths ranged between 39.9 and 71.4 mm for females, and 51.4 and 81.4 mm for males. All of the females were sexually mature, and most had already(More)
Ports are a key factor in the understanding and solving of most problems associated with marine invasive species across regional and global scales. Yet many regions with active ports remain understudied. The aim of this work was to (a) identify and quantify the marine fouling organisms in all Patagonian ports of Argentina classifying them as native, exotic(More)
In a collection of polychaetes from the Southwest Atlantic, off the Argentinian coast, ten scale worm species of the family Polynoidae were found. The following nine species are already known to science and their synonymy, diagnostic characters, and distribution are given together with remarks on taxonomy and geographical distribution: Eucranta mollis(More)
Anatomical and behavioral aspects of reproduction in female Dungeness crab, Cancer magister, were investigated. Female crabs were collected over a two-year period and external indicators of reproductive condition were recorded. A subset of crabs was retained for macroscopic and histological examination of the reproductive tract. In addition, males and(More)
Antitropicality is a distribution pattern where closely related taxa are separated by an intertropical latitudinal gap. Two potential examples include Brachidontes darwinianus (south eastern Brazil to Uruguay), considered by some authors as a synonym of B. exustus (Gulf of Mexico and the Caribbean), and B. solisianus, distributed along the Brazilian coast(More)
The different types of shell damage caused to the commercially valuable Tehuelche scallop (Aequipecten tehuelchus) by the polychaete Polydora rickettsi are described. X-rays, computerized tomography, shell sections, scanning electron microscopy, Energy Dispersive X-ray analysis (EDAX), mineralogical analyses and geometric morphometrics were applied to that(More)
Opheliid polychaetes belonging to the genera Armandia, Ophelia, Ophelina, and Travisia, collected along the Southwestern Atlantic coast off Brazil and Argentina, are recorded or given extended descriptions. Travisia amadoi sp. n., Ophelina gaucha sp. n. and Ophelina alata sp. n. are described.
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