Morales-Núñez, Andrés G.

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    Caracterización temporal y espacial de la macroinfauna béntica tropical alrededor de jaulas sumergidas para el cultivo de peces en mar abierto.
    (2005) Morales-Núñez, Andrés G.; Alfaro, Mónica; College of Arts and Sciences - Sciences; Alston, Dallas E.; Borges, Sonia; Macchiavelli, Raúl; Department of Biology; Marí Mutt, José A.
    With the purpose of determining if some effect exists on the tropical béntica community by the food introduction, the production of metabolic remainders of the fish and the food remainders like result of the aquaculture in open sea. A spatial and temporal characterization of the benthic macroinfauna was done in response to the installation of two cages for open ocean fish culture placed 28 m deep and located 3.2 km south of Isla Culebra, Puerto Rico. Bimonthly samplings (October 2002 to October 2003) were made to obtain sediment samples north, south, east, west and at center sites under each cage and in a control site. Nutrient concentration, organic matter content, and sediment texture were determined. The low nutrient concentration was constant over time and space; a significant increase in organic matter content was observed only in October 2003. The Shannon-Wiener Index indicated no significant change in the benthic community in relation to the impact of this system through the study year. The current speed (20-30 cm/s) and the associated fauna around the cages seem to play an important role avoiding pollution in the area selected for this type of aquaculture.
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    Tanaidaceans (Crustacea: Peracarida) from coastal waters of La Parguera and Culebra Island, Puerto Rico, with taxonomic observations
    (2010) Morales-Núñez, Andrés G.; García-Saís, Jorge R.; College of Arts and Sciences - Sciences; Alfaro Lozano, Mónica; Santos Flores, Carlos; Schizas, Nikolaos V.; Aponte, Nilda E.; Department of Marine Sciences; Ramirez, Wilson
    This work represents a taxonomic contribution to the knowledge of the Order Tanaidacea, Crustacea from shallow waters of Puerto Rico, an order of free-living and exclusively benthic malacostracans belonging to the Superorder Peracarida. Even thought tanaidaceans occur in large numbers in shallow waters with population densities for a single species often in the thousands per m2, this group has been neglected in most ecological studies because of complicatedness associated with the identification of its members. Four different chapters present the new taxonomic findings as follow: 1) Saltipedis (Spinosaltipedis) puertoricensis, new subgenus, new species, is described from eastern Puerto Rico off Culebra Island at a depth of 28 m. The new species is the fourth representative of the genus Saltipedis Guţu to be described from the Western Atlantic. The new subgenus is distinguished from the currently recognized members of the subgenus Saltipedis Guţu by the presence of strongly developed accessory setae on the mandible between the base of the palp and the molar process. A combination of other characters that further distinguish S. puertoricensis from its congeners are presented, as well as keys for the separation of the females and known males of Saltipedis. 2) Echinoparapseudes alfaroae, new genus, new species, is reported and described from material collected from a depth of 28 m off Culebra Island on the eastern coast of Puerto Rico. The new genus is placed in the family Parapseudidae Guţu and is distinguished from these other genera by a combination of characters. 3) A new kalliapseudid species, Mesokalliapseudes quadriflagellata from la Parguera Puerto Rico is described and illustrated. Remarks on the genus Mesokalliapseudes are presented. 4) Two new leptocheliid tanaidaceans, Pseudoleptochelia juliae and Pseudonototanais oglei, are described from La Parguera and Culebra Island, respectively.