Search results for "ZOOLOGIA"

Primo contributo alla filogenesi dei diaptomidi paleartico-occidentali (Copepoda, Calanoida)

2013

Updated checklist and distribution of the inland-water calanoid copepods (Copepoda: Calanoida) of Romania

2009

No recent studies on the distribution of calanoid copepods in Romanian inlandwaters are available. During a long-term survey aimed at large branchiopods, we collected two diaptomid species that are new for the fauna of the country, and supplemented the available data on the distribution of other calanoid species with new records. As already observed in the case of large branchiopods, the habitats of the mountain basins of the Eastern Carpathians seem to be characterized by a quite distinct species assemblage. The high calanoid species richness of Romanian inland-waters, and the need for further, more comprehensive surveys aimed at mapping the actual diversity of this order in Romania are st…

Estado de conservación de las tortugas marinas en España (revisión del periodo 2013-2018)

2021

[ES] El presente documento revisa la situación y aporta nuevos datos para las tortugas marinas en España durante el periodo 2013- 2018. Se revisa el estado de conservación para el periodo 2013- 2018 en cada una de las demarcaciones marítimas españolas: Levante¿Baleares y Estrecho¿Alborán para el Mediterráneo, y Noratlántica, Sudatlántica y Macaronesia en aguas del océano Atlántico. Se incluyen análisis de tendencias, las presiones y amenazas que afectan a cada especie y bibliografía actualizada. Para Caretta caretta, se recopila la información de los nidos en las costas mediterráneas españolas desde 2013 hasta 2018 y los movimientos de juveniles nacidos en España, tras su liberación.

Analisi della dieta di Discoglossus pictus (Otth, 1837) in Sicilia (Anura: Alytidae).

2013

Analysis of diet in Discoglossus pictus (Otth, 1837) from Sicily (Anura: Alytidae). The Painted frog (Discoglossus pictus Otth, 1837) (Alytidae) is a monotypic species distributed in North Africa, Sicily and Malta. Many studies have been made in the past about morphological and genetical aspects, but as regards the diet very little can be found in bibliography. This study shows data of a sample of individuals from a breeding site of western Sicily. Samplings were taken from November 2009 to June 2010, during the night. A total of 82 specimens were collected (67 MM and 15 FF). From these we obtained 50 stomachal contents by using the stomach-flushing technique. From stomach contents analysis…

DROSOPHILA

1993

Estudio biológico de este organismo. Ciclo biológico de la drosophila.

LOOKING FOR CYTOGENETIC SIGNATURES WITHIN EUARCHONTOGLIRES SUPER-CLADE BY ZOO-FISH COMPARATIVE CHROMOSOME PAINTING AND PHYLOGENETIC ANALYSIS

2009

ENVIRONMENTAL QUALITY OF SOFT-BOTTOM IN HAIFA BAY (ISRAEL): AMPHIPOD ASSEMBLAGES

2016

Ecological information concerning amphipods and representation of their spatial distribution through GIS provides an estimate of local environmental quality.

Modelling distribution and habitat preferences of vulnerable species

2011

Diurnal habitat suitability for a Mediterranean steppeland bird, identified by Ecological Niche Factor Analysis

2011

Context The negative effects of agricultural intensification and policies, use of pesticides, fertilisers and mechanised harvesting on several populations of pseudo-steppe birds have increasingly required more detailed and effective habitat suitability models. Distribution models of farmland species are prone to incur recordings of false absence data. Ecological Niche Factor Analysis (ENFA) allows identification of environmental predictors of species distribution by using presence data only. Aims We quantified the diurnal habitat preferences and niche width of one steppe species, the stone curlew (Burhinus oedicnemus), with unfavourable conservations status in a Mediterranean area and recl…

Cryptic diversity, niche displacement and our poor understanding of taxonomy and ecology of aquatic microorganisms

2022

AbstractThe analysis of ecological niche is an important task to correctly identify the role exerted by species within ecosystems, to assess their vulnerability, to plan effective measures addressed at fulfilling the postulates of biological conservation, and ultimately to prevent biodiversity loss. However, for the majority of organisms our knowledge about the actual extent of their ecological niche is quite limited. This is especially true for microscopic organisms. Evidence exists that in different geographical areas allegedly conspecific populations can show different, if not antithetical, ecological requirements and not-overlapping ecological niches. This opinion paper discusses whethe…