34 research outputs found
Pleistocene cave hyenas in the Iberian Peninsula: New insights from los aprendices cave (Moncayo, Zaragoza)
A new Pleistocene paleontological site, Los Aprendices, located in the northwest-ern part of the Iberian Peninsula in the area of the Moncayo (Zaragoza) is presented. The layer with fossil remains has been dated by amino acid racemization to 143.8 ± 38.9 ka (earliest Late Pleistocene or latest Middle Pleistocene). Five mammal species have been identified in the assemblage: Crocuta spelaea (Goldfuss, 1823) Capra pyre-naica (Schinz, 1838), Lagomorpha indet, Arvicolidae indet and Galemys pyrenaicus (Geoffroy, 1811). The remains of C. spelaea represent a mostly complete skeleton in anatomical semi-connection. The hyena specimen represents the most complete skel-eton ever recovered in Iberia and one of the most complete remains in Europe. It has been compared anatomically and biometrically with both European cave hyenas and extant spotted hyenas. In addition, a taphonomic study has been carried out in order to understand the origin and preservation of these exceptional remains. The results sug-gest rapid burial with few scavenging modifications putatively produced by a medium sized carnivore. A review of the Pleistocene Iberian record of Crocuta spp. has been carried out, enabling us to establish one of the earliest records of C. spelaea in the recently discovered Los Aprendices cave, and also showing that the most extensive geographical distribution of this species occurred during the Late Pleistocene (MIS4-2)
Cold-water coral ecology in the Cap de Creus submarine canyon (northwestern Mediterranean): 7 years of multidisciplinary research
Corales de aguas frías en los cañones de Cap de Creus y Lacaze- Duthiers (noroeste del Mediterráneo): distribución batimétrica, estructura de tallas y morfología
XVII Simposio Ibérico de Estudios de Biología Marina (SIEBM), 11-14 September 2012, Donostia-San SebastiánPeer reviewe
Near-patient tests and the clinical gaze in decision-making of Swedish GPs not following current guidelines for sore throat – a qualitative interview study
Paleozoic origins of cheilostome bryozoans and their parental care inferred by a new genome-skimmed phylogeny
Phylogenetic relationships and the timing of evolutionary events are essential for understanding evolution on
longer time scales. Cheilostome bryozoans are a group of ubiquitous, species-rich, marine colonial organisms
with an excellent fossil record but lack phylogenetic relationships inferred from molecular data. We present
genome-skimmed data for 395 cheilostomes and combine these with 315 published sequences to infer relationships
and the timing of key events among c. 500 cheilostome species. We find that named cheilostome genera and
species are phylogenetically coherent, rendering fossil or contemporary specimens readily delimited using only
skeletal morphology. Our phylogeny shows that parental care in the form of brooding evolved several times independently but was never lost in cheilostomes. Our fossil calibration, robust to varied assumptions, indicates that
the cheilostome lineage and parental care therein could have Paleozoic origins, much older than the first known
fossil record of cheilostomes in the Late Jurassic
Trophodynamics and functional feeding groups of North Sea fauna: a combined stable isotope and fatty acid approach
Temporal changes in feeding habits and daily rations of Hoplostethus mediterraneus in the bathyal Ionian Sea (eastern Mediterranean)
Data on the diet, feeding habits and daily rations of Hoplostethus mediterraneus Cuvier, 1829 in the bathyal eastern Ionian Sea (Mediterranean Sea) are presented. A total of 430 specimens collected by bottom trawls at depths ranging from 473 to 603 m during four 24-h day–night sampling cycles covering the four annual seasons was examined. H. mediterraneus diet consisted of pelagic and vagile epibenthic prey, mainly crustaceans, and was dominated by benthopelagic natantian decapods (83.35% IRI, index of relative importance). Seasonal changes in diet were apparent and related to seasonal fluctuations in suprabenthic and zooplanktonic prey in the environment. Diel patterns in stomach fullness and trends in diel feeding cycles are discussed in relation to the vertical migratory movements of available prey (i.e. suprabenthos and zooplankton). Daily-ration estimates were determined by evacuation-rate models and ranged from 0.143% to 0.397% WW/WW. Overall, daily-ration estimates were within the range of the daily consumption of other deep-sea fish. Deduced from diet contents, we found a constant gross energy intake (305–316 kcal g–1) during all seasons. As a possible response to the reproductive peak of mature females observed in summer, H. mediterraneus increases its food consumption, which, in turn, is coupled with an increase in food availability