RESUMEN Este articulo presenta los resultados de una investigacion realizada con el fin de determinar el estado trofico de la laguna de La Cocha, cuerpo hidrico importante en Colombia y en el mundo, que hace parte del humedal Ramsar laguna de La Cocha, ecosistema que cumple distintas funciones y alberga una gran biodiversidad que se quiere proteger. Para lograr el proposito planteado, esta investigacion se realizo entre enero y septiembre de 2013, determinando el estado trofico mediante los indices de Carlson, el indice desarrollado por la OCDE (Organizacion para la Cooperacion y el Desarrollo Economico) y el indice de Carlson modificado por Toledo. Los resultados permitieron clasificar a la laguna de La Cocha como oligotrofica y ultraoligotrofica, caracteristica tipica de lagos de alta montana con bajos procesos de contaminacion de origen aloctono y autoctono. Palabras claves : Estado Trofico, Eutroficacion, Humedal Ramsar, Mesotrofico, Oligotrofico, Ultraoligotrofico, Laguna de La Cocha.

La reutilizacion de aguas depuradas en Espana se realiza desde hace decadas aunque no se llega a reutilizar mas del 5% del total de las aguas residuales recogidas. En algunos casos, como en Canarias, el agua depurada ha llegado a suponer un 20% del agua consumida. En este articulo se presentan cuatro ejemplos de reutilizacion de aguas depuradas asociados a condiciones hidricas diversas en Canarias, Andalucia y Cataluna. El agua se reutiliza en riego de campos de golf, filtros verdes, recarga profunda de acuiferos y recarga superficial. Los estudios se han enmarcado en el Proyecto CONSOLIDER-TRAGUA cuyo objetivo es abordar de manera integrada los aspectos implicados en la reutilizacion de aguas residuales procedentes de las estaciones depuradoras de aguas residuales urbanas.

The Guiniguada basin (Canary Island, Spain) is a valuable area in terms of landscape and natural resources, affected by the abandonment of livestock and agricultural production. The Gran Canaria island's high population density, the area limitations and also the dependence on tourism are leading to unsustainable development. The Guiniguada project (an Urban Pilot Project, FEDER Art 10, ERDF 97.11.29.003H) was promoted by the Canary Island Regional Government in order to mitigate the above mentioned problem. A part of the Guiniguada project consists in the creation of the "Information System for Agricultural and Livestock management, (ISAL)", a Geographic Information System (GIS) to improve agricultural, livestock and hydraulic resources management. Using the ISAL application presented in this paper, a higher speed data management, new possibilities for integration of different types and formats of data (maps, database files, statistics, remote sensing, ...) and finally better decision making are achieved. Thus, best practices on agricultural and livestock management are provided. Two application types are developed in ISAL: one is for the database management (water irrigation, manure management and nutrient crop needs, Graphic User Interface for the data base) and the other one is for the ISAL final user. Conceptual models, database designed for data thematic storage (agriculture, livestock and hydrology), are presented. Finally, some ISAL examples are demonstrated.

The study presented here proposes the reuse of reclaimed, filtered and disinfected water (RWuv) for direct use in animal production. Particularly, animal health and production were investigated during two production cycles. The water was used for animal consumption and facility cleaning. Cows, sheeps and goats were included in the study, and each group of animals was offered the RWuv ad libitum. There was a control group for each species, drinking conventional fresh water (FW). Both RWuv and FW were analyzed in order to determine water quality and safety. Chemical, microbiological, parasitological and toxicological parameters were investigated. Clinical evaluations, including complete physical examination and a monthly sample collection of blood, feces, urine, ruminal fluid and milk were performed. Those analyses were done in order to discover or notice any clinical sign of disease. Also, non-clinical chemistry profiles were performed using ICP and included serum, milk and urine concentration of Al, As, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sn and Zn. No clinical signs of diseases have been observed during the study. Hematological results were within normal values. Although most analyzed water parameters for two sources were statistically different, no signs of any toxicosis were observed. Higher concentration of B and P in RW compared to FW affected serum B and P concentrations in cows, but not in sheep or goats. None of the other nonclinical chemical parameters studied showed statistical differences between RW and control group.

Veterinary RecordVolume 146, Issue 18 p. 534-534 Short Communication Severe urolithiasis due to trimagnesium orthophosphate calculi in a goat C. Gutierrez DVM, PhD, C. Gutierrez DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorM. C. Juste DVM, PhD, M. C. Juste DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorM. P. Palacios AE, PhD, M. P. Palacios AE, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorJ. A. Corbera DVM, PhD, J. A. Corbera DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorE. Escolar DVM, PhD, E. Escolar DVM, PhD Universidad Complutense de Madrid, 28040 Madrid, SpainSearch for more papers by this author C. Gutierrez DVM, PhD, C. Gutierrez DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorM. C. Juste DVM, PhD, M. C. Juste DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorM. P. Palacios AE, PhD, M. P. Palacios AE, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorJ. A. Corbera DVM, PhD, J. A. Corbera DVM, PhD Department of Veterinary Internal Medicine, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, 35416 Las Palmas, Canary Islands, SpainSearch for more papers by this authorE. Escolar DVM, PhD, E. Escolar DVM, PhD Universidad Complutense de Madrid, 28040 Madrid, SpainSearch for more papers by this author First published: 29 April 2000 https://doi.org/10.1136/vr.146.18.534Citations: 2Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume146, Issue18April 2000Pages 534-534 RelatedInformation

Two cases of urinary retention in male dromedaries due to silica uroliths are presented. The animals were urethrostomized and one dromedary was euthanized 7 months later due to urethrostomy obstruction. The estimated daily intake of silica was 84.44 g. Silica, calcium, phosphorus and pH in urine were determined in healthy animals from the same farms, and the following values were obtained: 174.78 ± 3.46 mg/l (silica), 41.48 ± 4.82 mg/l (calcium), 20.4 ± 3.6 mg/l (phosphorus) and pH 8.2, respectively. Possible causes of urolithiasis were the early castration of the animals and the fact that salt was not added to the diet. To our knowledge, this is the first description of silica urolithiasis in the dromedary camel.