Diet composition of fish species from the southern continental shelf of Colombia

The diet composition of 30 fish species belonging to 16 families from the Pacific Coast of Colombia is described. Benthic crustaceans (37.5%) and bony fishes (23.7%, chiefly demersal) were the most important food items for the fish species analyzed. Data on diet composition of the fish species are presented for the first time which can be a source of information for trophic modeling

The numbers of z~2 star-forming and passive galaxies in 2.5 square degrees of deep CFHT imaging

We use an adaptation of the BzKs technique to select ~40,000 z~2 galaxies (to K(AB) = 24), including ~5,000 passively evolving (PE) objects (to K(AB) = 23), from 2.5 deg^2 of deep CFTH imaging. The passive galaxy luminosity function exhibits a clear peak at R = 22 and a declining faint-end slope ({\alpha} = - 0.12 [+0.16 -0.14]),while that of star-forming galaxies is characterized by a steep faint-end slope ({\alpha} = -1.43 +- [0.02] (systematic) [+0.05 -0.04] (random)). The details of the LFs are somewhat sensitive (at <25% level) to cosmic variance even in these large(~0.5 deg^2) fields, with the D2 field (located in the COSMOS field) most discrepant from the mean. The shape of the z ~ 2 stellar mass function of passive galaxies is remarkably similar to that at z ~ 0.9, save for a factor of ~4 lower number density. This similarity suggests that the same mechanism may be responsible for the formation of passive galaxies seen at both these epochs. This same formation mechanism may also operate down to z ~ 0 if the local PE galaxy mass function, known to be two-component, contains two distinct galaxy populations. This scenario is qualitatively in agreement with recent phenomenological mass-quenching models and extends them to span more than three quarters of the history of the Universe.Comment: 18 pages, 13 Figure

Frequently hypercyclic translation semigroups

Frequent hypercyclicity for translation $C_0$-semigroups on weighted spaces of continuous functions is investigated. The results are achieved by establishing an analogy between frequent hypercyclicity for the translation semigroup and for weighted pseudo-shifts and by characterizing frequent hypercyclic weighted pseudo-shifts in spaces of vanishing sequences. Frequent hypercylic translation semigroups in weighted $L^p$-spaces are also characterized

Propuesta de Diseño de Rutas Turístico-Culturales mediante el Empleo de SIG: Un Caso Aplicado

Cultural tourism routes and itineraries are tourism promotion tools that have under-gone a remarkable development in recent years, thanks to their ability to enhance the value of cultural heritage. In this sense, national and international organizations as well as private initiatives have designed tourist routes that cover a wide range of topics, while cultural itineraries have been recognized at the institutional level by organizations such as ICOMOS or the Council of Europe. The main objective of this article is to offer a proposal for the design of cultural tourist routes through the use of a geographic information system. To achieve this goal, we start from a brief theoretical framework in which the tourist use of geographic information systems and the conceptualization of tourist routes and their differences with itineraries are analyzed. Subsequently, the methodology used consists of two distinct phases. Initially, a quantitative study is carried out in which data on the late medieval heritage are collected and subsequently, through the use of a GIS, an index of tourist potentiality is carried out and the creation of a tourist route in the province of Cadiz (Spain). In this way the results obtained justify the route designed and the choice of municipalities, based on their greater availability of tourism resources (accessibility, hospitality etc.) and cultural (historical assets

Diet composition of fish species from the southern continental shelf of Colombia

The diet composition of 30 fish species belonging to 16 families from the Pacific Coast of Colombia is described. Benthic crustaceans (37.5%) and bony fishes (23.7%, chiefly demersal) were the most important food items for the fish species analyzed. Data on diet composition of the fish species are presented for the first time which can be a source of information for trophic modeling.Diets, Food organisms, Food preferences, Marine fish, Feeding behaviour, Colombia, Pacific coast,