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Ecological traits of vertebrates along elevations
Schovánková, Hana ; Hořák, David (advisor) ; Kubička, Lukáš (referee)
Animals that live in different altitudes are exposed to different environmental conditions. Among others, ambient temperature, precipitation and availability of resources change along an elevational gradient. An adaptation of vertebrates to these conditions causes that in populations or species that live in higher altitudes individual ecological traits evolves to a different degree than in those that live in lower altitudes. Studies suggest that vertebrates that live in higher altitudes usually have shorter active and breeding season, reach larger body size and weight, have slower growth, have smaller clutches or litters, mature at later age and live longer. However, almost in all traits we can find opposite trends. In all vertebrate groups similar changes in traits occur. However, some traits aren`t explored in all groups, for example grow of birds and mammals. Powered by TCPDF (www.tcpdf.org)
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Made of three dimensional teaching aids
Strnadová, Kristýna ; Řezníček, Jan (advisor) ; Novotný, Petr (referee)
This work deals with vertebrates bone preparation of birds and mammals to enrich the science classes at secondary school. It also expands the collection of vertebrate skeletons at the department of biology and enviromental studies. The display would be enriched by Talpa europea, apodemus sylvaticus, rattus rattus, alectoris rufa and skulls of octodon degus. In this work there are described ways how to prepare taxidermy and bone preparation is described from the beginning of collecting vertebrates, then methods of preparation (maceration, hot water maceration, dermestidae bettles and more) including degreasing and bleaching and final treatment not the get it damaged by insect. This work is completed by survey. There are involved teachers of biology at elementary schools. The idea of questionnaire was to find out what's equipment like and how often do teachers use nature products to enrich the lessons. Key words - taxidermy, osteological preparation, birds, mammals
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Developmental morphogenesis of attachment organs in lower vertebrates
Minařík, Martin ; Černý, Robert (advisor) ; Buchtová, Marcela (referee)
Adhesive organs are widespread structures among vertebrate larvae. They allow the larvae to attach to a substrate, so that the time for the development of mouth or motoric apparatus could be prolonged. Similar structures in ascidians, larvaceans and lancelets are known too. Thus, it might be hypothesized that the presence of some type of adhesive gland could indeed represent the ancestral state for chordate larvae. Interestingly, however, whilst in most species these glands take their developmental origin in ectodermal layer, in bichir, a member of a primitive actinopterygian lineage, their origin was suggested to be endodermal already at the beginning of 20th century. Since then, however, the former study has become almost forgotten and even recent analyses do not come with new findings on this topic. Because of the essential importance of study of bichir cement glands for understanding the relationship between these structures among chordates, I have decided to focus on this subject. To obtain appropriate comparative data Xenopus, Weather loach and Ribbed newt embryos were included in this study as well. By using combination of immunohistochemical and histological techniques the endodermal origin of cement glands in bichir was proven and their morphogenesis was described into considerable details. The...
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Study of differential potential of spermatogonial stem cells via transplantation in vertebrates
Kodedová, Barbora ; Krylov, Vladimír (advisor) ; Pšenička, Martin (referee)
Spermatogonia, or spermatogonial stem cells are necessary to maintain male fertility. In the complex process of ongoing spermatogenesis in the testes these pluripotent stem cells proliferate and differentiate into sperm cells. In 1994 the first spermatogonial transplantation technique was described in rodents to allow the study of male germ cells. The following series of studies of intra- and inter-species transmission of testicular tissue revealed the regenerative capacity of transplanted spermatogonial stem cells and their possible usage. Recently, spermatogonia transplantation systems are developed in many vertebrates making it possible to study the development of sperm as well as artificial production of male and female gametes derived from germ cell donors. The differentiation potential of spermatogonial stem cells enabled the creation of transgenic organisms by genetic manipulation of isolated spermatogonia and subsequent transplantation into a suitable recipient. Spermatogonial transplantation in the future may find their application in regenerative medicine, the treatment of disorders of spermatogenesis, or serve to preservation of genetic stock of endangered species.
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Influence of body size and temperature on cardiac function in vertebrates
Špičák, Luboš ; Starostová, Zuzana (advisor) ; Marková, Ivana (referee)
Heart, as main driving unit of circulatory system of vertebrates, ensure a great number of body functions by constant circulation of blood in every individual. This body functions are provided by transposport of energy in various forms and by transport of chemical substances. Number of these body functions are absolutely necessary in each momemnt of the lifetime. If we describe metabolism as speed of all reactions in body, then circulatory system is one of the key means to reach it. Metabolic rate increases with two basic factors, body mass and body temperature. It's not proportional relationship, but allometric increase is conditioned by power law. In addition, this exponential relationship is limited, in case of body temperature, by temperature range specific for each living organism. It would be expected that changes in size of body and body temperature might have strong influence to quality and function of circulatory systém and heart itself. However, metabolism is significantly influenced by some another factors like quality of adjacent surrounding. Organisms belonging to vertebrates habitated great number of various enviroments and they developed lots of adaptations to survive there. This adaptations include significant changes in cardiac architecture and heart functions. The aim of this work...
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Biological research in ultraviolet spectra: evolutionary and eto-ecological implications of UV reflectance in organisms
Pecháček, Pavel ; Kleisner, Karel (advisor) ; Hotová Svádová, Kateřina (referee)
Many species have surface patterns capable of reflecting ultraviolet light. The presence of UV reflecting markings on invertebrates (e.g. beetles, spiders, and butterflies) and many vertebrates has been proven by numerous studies. In my work, I lay a particular stress on Lepidoptera and, within the vertebrate taxon, on birds. The existence of UV reflecting surfaces on fish and reptiles and consequent questions are also mentioned. The aim of my work is to summarize all existing knowledge about UV reflectance, and to discuss its significance for subsequent research. My work also deals with the function of the UV textures, mainly in sexual selection, intra- and interspecies signaling and in foraging behaviour of the studied taxa. The last section touches those groups which do not reflect the ultraviolet light but are visually sensitive to it, e.g. certain kinds of zooplankton, amphibians and small mammals. The resulting summary shows a great significance of UV reflecting textures in various branches of biology and their importance in ecology and evolution of many species.
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Neural crest biology with respect to diversity of vertebrates
Štundl, Jan ; Černý, Robert (advisor) ; Němec, Pavel (referee)
Neural crest is an extensively migrating population of cells that arise during early development of vertebrate embryos. It provides a huge variety of different cell types that generate new tissues which occur only in vertebrates. Neural crest cells together with the mesoderm participate on the formation of the head of vertebrates, which is viewed as one of the most important innovations in the evolution of vertebrates. Thanks to their skeletogenic potencial neural crest cells are percieved as a key factor causing massive craniofacial diversity. The aim of this thesis was to get acquainted with the population of neural crest cells and try to understand its importance for the evolution of vertebrates and especially for generating craniofacial diversity.
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The possibilities of the Inquiry-based education in the Vertebrate Biology
JIRÁČKOVÁ, Bára
"The possibilities of the Inquiry-based education (IBE) in the Vertebrate Biology" is the Thesis, whose aim is to chart the possibilities of the teacher in the use of vertebrates in the common lesson. In view of the Laws No.246/1992Coll. and No.114/1992Coll. the possibilities how to use the vertebrates are very restricted. Even a common vertebrate-breeding in a class room is entirely excluded. The method of observation seems to be the most suitable one. The whole theoretical part of the Thesis deals with this method as well as the other methods and already existing tasks of IBE dealing with the vertebrates. There are three new complex tasks in the practical part of the Thesis: "Snapshot Serengeti get to know the fauna of the National Serengeti Park", "Birds in the Winter"and "Birds in the Winter - Excursion to zoo".
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Intestinal parasites of vertebrates in Svalbard
MYŠKOVÁ, Eva
The study was aimed to obtain basic information about the distribution of intestinal parasites of mammals and birds in Svalbard. Faeces of different species were used to detect intestinal parasites. All samples were collected during two seasons and examined by microscopic methods and molecular diagnostic was used for detection of microsporidia, cryptosporidia, coccidia and giardiae.
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Use exhibition Třeboňsko - landscape and people in teaching vertebrate zoology
ROKOS, Lukáš
The aim of the diploma thesis was to create didactic materials with motivation components that would use area of exhibition ?Třeboňsko ? landscape and people? in teaching vertebrate zoology. These materials are intended for pupils of basic and secondary schools, mainly in surrounding the town Třeboň. Diploma thesis includes the conceptual and structural analysis of vertebrate topic in biology schoolbooks. The materials are divided into two groups. First group are information worksheets and worksheets which are usable in the exhibition. Second group are proposals of excursions. Materials have own tasks and questions. Some of tasks were practically tested. Diploma thesis was solved in the project GA JU 065/2010/S.
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