Los fenómenos de marea roja y toxicidad de moluscos bivalvos en el Mar Argentino

Two unusual blooms of dinoflagellates appeared in the Argentine Continental Shelf in spring/summer period of 1980 and 1981, but these differed, one from the other. The first was an intense red-tide with which were associated no signs of toxicity, whereas the second, although; not showing special coloration, was associated with (and doubtless the cause of) intense toxicity in bivalves of the Gulfs of San Matías and San José and of the shelf waters off Península Valdés; the death of two fishermen was atributed to the latter. The first bloom developed as an unusual surface concentration of the predatory dinoflagellate Noctiluca scintillans. It was supposed that this concentration was produced by a particular combination of processes of circulation of water masses. The second bloom was characterizaed by high concentrations of Gonyalax excavata. Investigations at the time determined that toxins in molluscs of the area correasponded to what is called "paralytic shellfish poison". The bloom of G. excavata was associated with a front between well mixed and well stratified water masses. The maximum toxicity centre occured in the mussel bank "Constanza" (42°23'27"S and 62°45'66"W) which coincides with the front referred to above. (PDF contains 93 pages)

Los crustáceos decápodos Brachyura del litoral bonaerense (R.Argentina)

In this work the taxonomy of the Brachyura Decapod Crustacea from fthe shelfwaters of the Province of Buenos Aires, Argentina (South Atlantic Ocean) is described, with particular reference to the biology and zoogeography. The material and methods are described and various zoogeographical problems are considered. A total of 25 species were encountered, and each one is briefly described together with its ecological and biological data. In many cases the geographical distribution has been extgended. Keys are given for the identification of the more common Brachyura from Argentina, as also for the sub-divisions of the Brachyura, including ffamilies, subfamilies and genera. The so-called "cangrejal" community (community composed of semiaquatic crabs) of the river Salado was studied, which was composed of Chasmagnathus granulata crabs. The species Uca uruguayensis formed the outer limit of the "cangrejal" community.

Etnografía y alimentación entre los Toba-Nachilamole#ek y wichí-Lhuku’tas del Chaco Central (Argentina), Cap. 1, 2 y 3.

Se reproducen tres capítulos relacionados con la ictiología del libro de Pastor Arenas, gracias a su gentileza.

Ballenas, delfines y marsopas del Pacifico nororiental y de las aguas árticas adyacentes

Esta guía de campo se ha diseñado para que los observadores puedan identificar los cetáceos (ballenas, delfines y marsopas) que vean en las aguas del Pacifico nororiental, incluyendo el Golfo de California, Hawaii y el Ártico occidental de Norteamérica. Los animales descritos no se agrupan por sus relaciones científicas sino por las similitudes de su apariencia en el campo. Las fotografías de los animales en su ambiente natural son la principal ayuda para su identificación. Los anexos describen como y a quienes se debe reportar la información sobre cetáceos vivos y muertos y proveen detalles para ayudar en la identificación de los cetáceos varados.