Impact of COVID-19 on a paediatric emergency service.

COVID-19 has significantly affected the use of health care worldwide and, consequently, admissions to hospital emergency services. The aim of this study is to describe the change of the activity of a Paediatric Emergency Service (PES) of a tertiary hospital during the pandemic. A retrospective cohort study with analysis of visits to the PES from March 30 to June 30, 2020, and comparison with homologous periods in the previous 3 years (2017-2019).

Highly regional population structure of Spondyliosoma cantharus depicted by nuclear and mitochondrial DNA data.

Resolution of population structure represents an effective way to define biological stocks and inform efficient fisheries management. In the present study, the phylogeography of the protogynous sparid Spondyliosoma cantharus, in the East Atlantic and Mediterranean Sea, was investigated with nuclear (S7) and mitochondrial (cytochrome b) DNA markers. Significant divergence of four regional genetic groups was observed: North Eastern Atlantic, Mediterranean Sea, Western African Transition (Cape Verde) and Gulf of Guinea (Angola).

Otolith shape and isotopic ratio analyses as a tool to study Spondyliosoma cantharus population structure.

Knowledge on population units is critical for understanding population dynamics and providing an adequate fisheries management. Despite its vast distribution and commercial importance, there is no information on black seabream population structure. Different approaches to otolith analysis were used to elucidate on the stock structure of this species.

Genetic and Morphological Variation of the Forkbeard, Phycis phycis (Pisces, Phycidae): Evidence of Panmixia and Recent Population Expansion along Its Distribution Area.

The knowledge of population structure of a species is essential to effectively assess and manage fisheries. In the present study, genetics, by mitochondrial DNA cytochrome b sequence analysis, and body geometric morphometrics were used to evaluate the existence of distinct populations of the forkbeard (Phycis phycis), an important commercial species in several European countries, especially Portugal and Spain. For geometric morphometric analysis, specimens were collected in the Northeast Atlantic Ocean-Azores, Madeira and mainland Portugal, and for genetic analysis, these samples were complemented with samples collected in the Mediterranean Sea-Spain, Italy and Croatia, in order to cover the entire distribution area of the species.