Search results for "ZOOLOGIA"

Systematics of European coastal anchovies (genus Engraulis Cuvier).

2021

Reports of morphological differences between European anchovy (Engraulis cf. encrasicolus) from coastal and marine habitats have long existed in the ichthyologic literature, and have given rise to a long-standing debate on their taxonomic status. More recently, molecular studies have confirmed the existence of genetic differentiation between the two anchovy ecotypes. Using ancestry-informative markers, we show that coastal anchovies throughout the Mediterranean share a common ancestry, and that substantial genetic differentiation persists in different pairs of coastal/marine populations despite the presence of limited gene flow. On the basis of genetic and ecological arguments, we propose t…

On the origin and systematics of the northern African wood mouse (<i>Apodemus sylvaticus</i>) populations: a comparative study of mtDNA r…

2001

Conflicting hypotheses have been formulated regarding the origin of wood mouse (Apodemus sylvaticus) populations in northern Africa. In this study, the mtDNA restriction patterns of mice (n = 28) collected in Tunisia and Morocco are compared with those of representatives from southern Europe (n = 102). The neighbour-joining tree confirms the existence of the three lineages previously found in the Mediterranean area: western, Tyrrhenian–Balkan, and Sicilian. The western group is isolated from the two others, with bootstrap values of 89 and 95%. Northern African patterns are included in the western group. Their variability is low, the same pattern being shared by five Tunisian and all Morocca…

The role of extrinsic and intrinsic factors on departure decisions of a long-distance migratory passerine

2013

[EN] Factors determining departure decisions of migrants from a stopover site can be extrinsic and/or intrinsic but the relative role of each of these factors on departure decisions is still poorly known. Date and wind should be the main factors determining departure decisions in a long-distance migrant, which is expected to minimise duration of migration. Date was considered as an intrinsic factor and wind as an extrinsic one. We analysed the capture-recapture data of a long-distance migrant European songbird, the sedge warbler Acrocephalus schoenobaenus,from a stopover site in northern Iberia during the autumn migration period to quantify the relative importance of several factors on emig…

A network of Italian amphipodologists in the frame of MOTax (Marine Organisms Taxonomy) at the Stazione Zoologica Anton Dohrn di Napoli (Italy)

2017

Talitraits: a taxonomic backbone for talitrid amphipods’ traits

2019

First record of arctodiaptomus wierzejskii (Richard, 1888) (Copepoda Calanoida Diaptomidae) from Malta

2020

Diaptomid copepods belonging to the genus Arctodiaptomus Kiefer, 1932 were collected in two temporary water bodies in Malta. The morphological identification of the collected specimens proved that they belong to Arctodiaptomus wierzejskii (Richard, 1888) even if a morphological peculiarity pertaining to the morphology of the male right antennule of the Maltese populations was observed and here briefly discussed. This finding constitutes the first record of a calanoid copepod from the inland waters of the Maltese Islands.

Emys orbicularis (Linnaeus, 1758) (Testuggine palustre europea), E. trinacris Fritz et al., 2005 (Testuggine palustre siciliana).

2016

Aberrant gene expression profiles in Mediterranean sea urchin reproductive tissues after metal exposures

2019

Abstract Marine organisms are simultaneously exposed to numerous pollutants, among which metals probably represent the most abundant in marine environments. In order to evaluate the effects of metal exposure at molecular level in reproductive tissues, we profiled the sea urchin transcriptional response after non-lethal exposures using pathway-focused mRNA expression analyses. Herein, we show that exposures to relatively high concentrations of both essential and toxic metals hugely affected the gonadic expression of several genes involved in stress-response, detoxification, transcriptional and post-transcriptional regulation, without significant changes in gonadosomatic indices. Even though …

The recent non-marine ostracods of tunisia: An updated checklist with remarks on their regional distribution patterns and ecological preferences

2020

Different lines of investigation have recently contributed to increasing the available knowledge about the invertebrates inhabiting inland waters of north Africa, but a comprehensive synopsis on Tunisian Ostracoda is missing to date. An updated checklist of Recent non-marine ostracods from Tunisia and data on their distribution is thus offered here, representing the most extensive survey on this crustacean group ever carried out in inland waters throughout the country. One-hundred-five sites covering various climate zones, from Mediterranean to desert areas, were sampled between 2002 and 2012. Most of the considered water bodies were temporary or ephemeral habitats, but a few permanent site…

Interactions of elasmobranchs with other taxa in Iberian waters: parasitism and agonistic relationships

2022

Esta tesis doctoral está dedicada al estudio de las comunidades de helmintos parásitos en elasmobranquios que se encuentran en aguas ibéricas, tanto en el Atlántico como en el Mediterráneo, con comentarios sobre las relaciones agonísticas entre la tintorera (Prionace glauca) y el pez espada (Xiphias gladius), cuestiones que no habían no ha sido abordadas antes por otros investigadores. El presente estudio proporciona, por primera vez, un informe cuantitativo sobre la fauna de cestodos en cuatro especies de elasmobranquios, el tiburón marrajo dientuso (Isurus oxyrinchus); la tintorera (Prionace glauca); la tremielga, (Torpedo marmorata), y el torpedo común (Torpedo torpedo), en aguas ibérica…