Molecular genetic characterization of endemic red -tailed barb,Gonoproktoptems curmuca (Hamilton - Buchanan, 1807)

The family Cyprinidae is the largest of freshwater fishes and, with the possible exception of Gobiidae, the largest family of vertebrates.Various members of this family are important as food fish, as aquarium fish, and in biological research. In this study, a fish species from this family exclusively found in the west flowing rivers originating from the Western Ghat region — Gonoproktopterus curmuca — was taken for population genetic analysis.There was an urgent need for restoration ecology by the development of apt management strategies to exploit resources judiciously. One of the strategies thus developed for the scientific management of these resources was to identify the natural units of the fishery resources under exploitation (Altukov, 1981). These natural units of a species can otherwise be called as stocks. A stock can be defined as a panmictic population of related individuals within a single species that is genetically distinct from other such populations.It is believed that a species may undergo micro evolutionary process and differentiate into genetically distinct sub-populations or stocks in course of time, if reproductively and geographically isolated.In recent times, there has been a wide spread degradation of natural aquatic environment due to anthropogenic activities and this has resulted in the decline and even extinction of some fish species. In such situations, evaluation of the genetic diversity of fish resources assumes important to conservation.The species selected for the study, was short-listed as one of the candidates for stock-specific, propagation assisted rehabilitation and management programme in rivers where it is naturally distributed. In connection with this, captive breeding and milt cryopreservation techniques of the species have been developed by the National Bureau of Fish Genetic Resources, Lucknow. However, for a scientific stock-specific rehabilitation programme, information on the stock structure and basic genetic profile of the species are essential and that is not available in case of G. curmuca. So the present work was taken up to identify molecular genetic markers like allozymes, microsatellites and RAPDs and, to use these markers to discriminate the distinct populations of the species, if any, in areas of its natural distribution. The genetic markers were found to be powerful tools to analyze the population genetic structure of the red-tailed barb and demonstrated clear cut genetic differentiation between pairs of populations examined. Geographic isolation by land distance is likely to be the factor that contributed to the restricted gene flow between the river systems. So the present study emphasizes the need for stock-wise, propagation assisted-rehabilitation of the natural populations of red-tailed barb, Gonoprokfopterus curmuca.

Toxicological effects of Copper and Mercury on the fish Macrones gulio (Hamilton-Buchanan)

Asha M. R This thesis Entitled Toxicological effects of copper and mercury on the fish macerones gulio (hamiloton – buchanan).Chapter 1. In this chapter, a broad outline of heavy metal uptake, requirement of a suitable bio — monitoring organism, criteria for a standard test fish, and suitability of Macrones gulig for the toxicological study are given. Chapter 2. This chapter deals with the lethal toxicity bioassays to find the 96 hr LC 50 of copper and mercury for the fish Macrones gglig. The experimental results indicated that of the two metals tested, copper was more toxic than mercury.Chapter 3. The effect of copper and mercury on the haemoglobin, haematocrit, erythrocyte count, MCV, MCH and MCHC was studied.Chapter 4. The glycogen and protein contents of liver and muscle after exposure to copper and mercury were studied. There was a significant decrease of glycogen in the liver and muscle of metal treated fishes.Chapter 5. The histopathological changes of the tissues like liver, kidney and gill after exposure to copper and mercury were studied.

Studies on the effect of steriod hormones on the gronth and biochemical composition of the mullet liza.parsia (hamilton)

The present study has helped in finding out an efficient growth promoting substance for the fry of Liza garsia. 1Zfimethyltestosterone at the dosages of 2 mg/kg diet is the most effective anabolic agent for Liza parsia. The study also shows that by incorporating 8 mg MT/kg of diet the protein level in the diet could be reduced from 35 to 30%. thereby a significant saving in the cost of feed could be obtained. Further, the anabolic effect of MT helps to reduce the rearing period during the production of fingerlings from the fry stage.

Nutritional Requirements Of The Fry Of Gold-Spot Mullet Liza Parsa (Hamilton)

Most tropical aquatic environments are naturally fertile and their natural fertility is renewed very rapidly. Natural food for many cultivable organisms can be grown to the maximum by proper management. However, enrichment of the environment can be done through rational fertilization. Still further increase in stocking rates, can yield increased crop if adequate feeding is done. Thus fish and shellfish nutrition is an important aspect of the multidisciplinary subject of aquaculture. The oldest and most classical studies in physiology have investigated the nutritional needs of the species of interest to aquaculture. The alimentary requirements for proteins, lipids, mineral salts and vitamins have been established for some temperate species. But, the nutritional requirements of only few tropical species have been studied. Before formulating a diet, a thorough knowledge of the nutrient requirement of the species is essential. It is against this background that the present area of investigation has been identified. "Nutritional requirements of the fry of gold-spot mullet Liza parsia" is a comprehensive attempt to quantify the nutritional factors that are essential for producing healthy fingerlings for stocking the farms. Aspects such as the protein and lipid requirements of the fry, the vitamin essentiality, nutritive evaluation of protein and lipid sources suitable for compounding diets were covered in this research project. The ultimate aim has been to evolve practical diets which could be applied in the nursery phase for juvenile production.

Studies on the digestive enzymes of the cultivable grey mullet liza parsia (hamilton buchanan, 1822)

Culturing of fish in captivity demands a detailed knowledge on well balanced diet and adequate feeding. Formulation and production of nutritionally balanced diets for fish require research, quality control and biological evaluation. It is often assuemed that what is ingested is also digested, but this is not always be the case. Digestion depends upon both the physical state of the food and the kind and quantity of enzymes in the digestive tract. The ability of fish to digest a particular component of diet can be ascertained by investigating the complement of digestive enzymes present along the digestive tract. Investigations on the basic digestive physiology will not only enhance our present knowledge on nutrition and feed development, but will also contribute in understanding the digestive functions of lower vertebrates. It is against this background that the present topic of investigation "Studies on the digestive enzymes of the cultivable grey mullet Liza parsia Hamilton Buchanan, l822" has been selected. The thesis is arranged and presented in eight chapters.

"Effects of some heavy metals copper. zinc and lead on certain tissues of £153 Qarsia (Hamilton and Buchanan) in different environments

The research investigations on pollution, particularly in coastal/ estuarine environments are recent ones and started only in 1970s. Hence the informations available are fragmentary and scattered. They throw some light only on either the concentration of heavy metals in water or in sediment or in organisms. No concerted efforts have been made to consolidate and correlate the results between the environment and biota. Literature on the level of concentration of heavy metals in different tissues of organisms with regard to their availability in the living media, their ratio, their inter—relationship, tolerance limit of organisms, etc. are very few or rather nil. in view of the importance enumerated above, the candidate has selected the topic "Effects of some heavy metals copper, zinc and lead on certain tissues of E E (Hamilton and Buchanan) in different environments" for detailed studies and to understand systematically (i) the source of effluents and wastes, (ii) the concentration of heavy metals copper, zinc and lead in water, in sediments and in tissues of the test animal, (iii) their effects, (iv) capacity of tolerance and accumulation in different tissues of the animal, and (V) the "Bioaccumulation Factor", etc.

SAGA: System for Automated Geographical Analysis [abstract]

SAGA (System for Automated Geographic Analysis) es un SIG libre con capacidades para el manejo y análisis de información tanto vectorial como ráster, con un especial enfoque en esta última. Asimismo, es su enfoque analítico el que constituye su característica más destacable, siendo una herramienta de primer orden para la extracción de información a partir de todo tipo de capas de datos georeferenciados. (...)

Cooperación franco-española frente al terrorismo de ETA durante los gobiernos de José Luis Rodríguez Zapatero, Jacques Chirac y Nicolás Sarkozy

Esta monografía analiza la amenaza que representa ETA para Francia y España; la respuesta frente al problema de los Estados implicados y propone los posibles factores limitantes a la cooperación que no han permitido eliminar la amenaza terrorista.

[Ressenya del llibre Géographies du politique, de Jacques Lévy (ed.)]

Ressenya del llibre Géographies du politique, obra dirigida per Jacques Lévy on es pretén aplegar el màxim de reflexions sobre el concepte d’espai polític, entenent l’espai polític com una dimensió més de l’espai social, presentat en divuit opinions de diferents autors

Análisis del Ejército Zapatista de Liberación Nacional como modelo de guerrilla estética, a la luz de la teoría de la resistencia planteada por Jacques Rancière

Justo ahora, cuando parece haberse agotado el entendimiento del zapatismo como movimiento revolucionario tradicional, esta monografía propone dar un doble salto mortal para destruir las barreras obsoletas de las teorías revolucionarias y aterrizar en lo que Rancière llama la Resistencia de los Sin Parte. El alarido bestial se transforma en palabra para sacudir las estructuras más íntimas del orden y actualizar la pésima partición de los lugares y las funciones comunes en la comunidad. Las partes mal contadas acceden a la palabra para reclamar una partición justa de lo común, e inscribir así las libertades como axiomas para el todo comunitario. Lo descolorido toma color, lo oculto es visto, lo incontado entra en el conteo de las partes, lo que no tiene rostro ni voz es ahora escuchado, las sombras adquieren cuerpos y los cuerpos adquieren vida. La resistencia por la incorporación cambió para siempre la política tradicional mexicana, al punto de que ésta ha dejado de llamarse como tal para quien escribió esta investigación. La palabra común, la imagen del líder Marcos, y los símbolos como el pasamontañas, hacen que la rebelión zapatista sea una rebelión desde y para los sin parte, una voz para incorporar a los sin voz: el rostro indefinido de una máscara que defiende con enjundia a los olvidados y los devuelve a la arena de los vistos. Chiapas habla, los fantasmas resucitan, las partes mal contadas reclaman una justa partición de lo visible en la comunidad. Marcos y los suyo se han salido con la suya.

Jacques Carelman : objetos imposibles.

En muchas ocasiones, la interpretación cotidiana de lo que algunos entienden por realidad nos acostumbra a una percepción monótona y plana de lo que nos rodea. Jacques Carelman apuesta por la sorpresa, conmociona nuestros sentidos y proporciona nuevas posibilidades de reflexión ante lo chocante por supuestamente imposible. En este vídeo se hace una aproximación a su obra aprovechando las exposiciones de este autor celebradas en La Regenta de Las Palmas y en la Casa de Cultura de Santa Cruz de Tenerife.

El lenguaje vectorial en geometría : los pioneros William Rowan Hamilton y Herman Günther Grassmann.

Resumen del autor. Este artículo pertenece a un número en homenaje a Gonzalo Sánchez Vázquez

Bogotá no tiene mar pero tiene playa: el vallenato y sus intérpretes costeños en Bogotá

La Playa es un sector de la ciudad de Bogotá, donde se encuentra la oferta de músicos informales más grande de Colombia: mariachis, tríos de cuerda y grupos vallenatos. En esta investigación, se analiza la migración de músicos vallenatos provenientes del Caribe colombiano a este sector de la capital del país; se examina el trabajo de estos músicos en La Playa; y se revisa el proceso de consolidación del vallenato como música nacional.

Hamilton : la liberación del álgebra.

Se hace un recorrido por la figura de William Rowan Hamilton. Además de aspectos biográficos, se hace referencia a sus principales teorías relacionadas con las matemáticas como son los números irracionales, el álgebra de parejas o los cuaterniones.