HERPETOLOGY

Author: PENA PICO M. EUGENIA.
Year: 2003.
University: VIGO [www.uvigo.es].
Place of defense: FACULTAD DE CIENCIAS.
Place of preparation: FACULTAD DE CIENCIAS.

Summary: This report deals with the environmental impact studies. We study projects carried out in Sallent de Gállego (Aragonese Pyrenees), on the occasion of the ski slopes. So, comparing our own impact study ambienal with other previous studies relating to the same area. Through this comparison we see that these studies are questionable in terms of methodology and results. We will propose that the environmental impact studies with a new methodology that allows us to quantify, and not just qualify, more accurate potential impacts that may occur. The methodology presented in this thesis is based on asymmetry flcutuante of animals in the area, and is more objective that used previously in studies of the environmental impact. Also, the report can serve as a tool for drafting new legislation to complement existing legislation on nature conservation in the mountain.

Author: FERNÁNDEZ ALZAS MARIA DOLORES.
Year: 2003.
University: EXTREMADURA [www.unex.es].
Place of defense: FACULTAD DE CIENCIAS.
Place of preparation: FACULTAD DE CIENCIAS.

Summary: The lizard ocelado (lacerta lepida, david.1802) is a reptile insectivoro of relatively rapid growth and great ecological importance, as a regulator entomico and pesticide rodéntico. In cavity accepts food and natural alternative, being easy to maintain. This paper seeks to know the factors that influence their growth in captivity, in order to make it profitable on the one hand and on the other to obtain a pool reservoir for the reinforcement of the natural populations.

Author: PERERA LEG ANA.
Year: 2004.
University: SALAMANCA [www.usal.es].
Place of defense: FACULTAD DE BIOLOGIA.
Place of preparation: UNIVERSIDAD DE SALAMANCA.

Author: CAMIÑAS HERNÁNDEZ JUAN ANTONIO.
Year: 2005.
University: COMPLUTENSE DE MADRID [www.ucm.es].
Place of defense: SALON DE GRADOS, FACULTAD DE BIOLOGÍA.
Place of preparation: FACULTAD DE CIENCIAS BIOLÓGICAS.

Summary: The Boba Turtle (Caretta caretta L. 1758) is a Quelonio widely distributed by the Globe temperate seas. In the area of distribution of the species include the Mediterranean Sea. The area between the Strait of Gibraltar and the Balearic Islands is an area of the Mediterranean Sea with oceanographic characteristics individuals, as a result of the influx of Atlantic water surface through the Strait of Gibraltar and its eastward expansion, while that is mixed. The Strait of Gibraltar is the only link from the Atlantic Ocean to the Mediterranean and is the step required for highly migratory marine species, such as Sea turtles. Fisheries surface, mainly in longline fishing to the surface and drift gillnets set adrift are two types of gear that, in addition to the target species, swordfish (Xiphias gladius) and tuna red (Thunnus thynnus), caught incidentally Sea turtles, mainly Turtle Boba. This thesis analyzes the effect of various Spanish fisheries in the western Mediterranean and Straits of Gibraltar. Among the key findings include: * Turtles of the species Caretta present in the western Mediterranean from two genetic populations, the Atlantic and the Mediterranean. * Turtles of the Atlantic penetrate through E.de Gibraltar in Spring, staying in waters of the western Mediterranean until the end of summer. These days, and during the early months of autumn there is a return migration of a portion of the population toward Atlantic waters. Turtles migrate from the eastern Mediterranean to the western Mediterranean waters in Spring returning to eastern waters at the end of the summer. * Over a period of several months gather in the area west of the Mediterranean, including juvenile and adult populations of Atlantic and Mediterranean. The area around the Balearic Islands and from these to the Iberian peninsula is a potential area of forage Turtle Boba Atlantic and Mediterranean. * The migration process for both populations rise to a maximum abundance of the species Caretta during the months of June to August. This process is repetitive. This is repeated in a similar way every year, with slight variations in the timing of displacement towards the Balearic Islands and the dates of entry and exit through the Strait of Gibraltar. * The surface longline fisheries catch abundant copies of Turtle Boba accidentally coinciding area summer residence of the species with the greatest distribution of the Spanish fleet fishing for that fishing gear. * Estimates are made of the relative abundance of Turtles per month and geographic areas grade by grade from the catch of longline fleet Turtles for the Spanish. * Proposed periods of input and output via Gibraltar based on catches of Turtle Boba by fleets to drift gill net in the area of the Straits of Gibraltar and the Atlantic and Mediterranean areas nearby. * Proposed fisheries biology methods to estimate the distribution, abundance and mortality of the species and as a scientific tool to ascertain the status of Boba turtle populations in the western Mediterranean.