A tale of two seas: a meta-analysis of crustacean stocks in the NE Atlantic and the Mediterranean Sea

2015 ◽  
Vol 17 (3) ◽  
pp. 617-636 ◽  
Author(s):  
Paraskevas Vasilakopoulos ◽  
Christos D Maravelias
Keyword(s):  
Mediterranean Sea ◽  
Meta Analysis ◽  
Ne Atlantic ◽  
The Mediterranean

scholarly journals New insights in the biogeographical distributions of two Spionidae (Annelida) from the NE Atlantic and Mediterranean French coasts

Zoosymposia ◽  
2020 ◽  
Vol 19 (1) ◽  
pp. 173-184
Author(s):  
JÉRÔME JOURDE ◽  
NICOLAS LAVESQUE ◽  
CÉLINE LABRUNE ◽  
JEAN-MICHEL AMOUROUX ◽  
PAULO BONIFÁCIO ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Morphological Characters ◽  
Bay Of Biscay ◽  
Ne Atlantic ◽  
Marine Waters ◽  
Gulf Of Lion ◽  
The Mediterranean ◽  
Brown Pigmentation

We report the first occurrences of Spiophanes afer Meißner, 2005 and Prionospio cristaventralis Delgado-Blas, Díaz-Díaz & Viéitez, 2018 from French marine waters (from the southern part of the Bay of Biscay in NE Atlantic, and the Gulf of Lion in the Mediterranean Sea). Morphological characters of S. afer include the presence of an occipital antenna, dorsal ciliated organs extending to chaetigers 13–15, neuropodial hooks from chaetiger 15, ventrolateral intersegmental pouches from chaetigers 14–15, chaetal spreaders of “2+3 type”, and conspicuous dark brown pigmentation on parapodia of chaetigers 9–13. Prionospio cristaventralis has four pairs of branchiae (1st and 4th pinnate, 2nd and 3rd apinnate), ventral crests from chaetigers 11–12, high dorsal crests on chaetigers 10–11, and very large notopodial prechaetal lamellae on anterior chaetigers. Both records represent northern extensions of their known distributions. However, the presence of S. afer on French coasts may have been overlooked for several decades. The validity of the recently proposed Spiophanes adriaticus is questioned.

scholarly journals British sharks in Sicily: records of long distance migration of tope shark (Galeorhinus galeus) from North-eastern Atlantic to Mediterranean Sea.

2019 ◽  
Vol 20 (2) ◽  
pp. 309 ◽  
Author(s):  
FRANCESCO COLLOCA ◽  
DANILO SCANNELLA ◽  
MICHELE LUCA GERACI ◽  
FABIO FALSONE ◽  
GIUSTO BATISTA ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Ne Atlantic ◽  
East Atlantic ◽  
Central Mediterranean ◽  
Long Distance ◽  
Strait Of Sicily ◽  
North East ◽  
North Eastern ◽  
The Mediterranean ◽  
Galeorhinus Galeus

The study reports information about the recapture of two tagged adult females of tope shark, Galeorhinus galeus (Linnaeus 1758), in the central Mediterranean Sea (south coasts of Sicily) in 2014 and 2017. The two females were tagged in North-East Atlantic, respectively in Scotland in 2009 and Ireland in 2015. The Scottish specimen was a 175 cm female increasing of about 10 kg in body weight and 37 cm in total length during its 1967 days at liberty (5.39 years). The Irish one, was a pregnant female of an estimated age of 15-17 year which spent 248 days at liberty increasing 14 cm during this period. The growth rate of the two specimens was therefore between 6.8 and 7.8 cm year-1, faster than the annual increments of adults suggested in previous studies. Previous tope recapture records in the Mediterranean Sea were limited to the Alboran Sea, coast of Valencia and the Algerian coasts. The two tope females recaptured in the Strait of Sicily provided the first evidence of long distance entrance of NE Atlantic tope in the Mediterranean Sea. The well known occurrence of mature females and juveniles in this area of the Mediterranean suggest the hypothesis of a migration of adults female from their feeding grounds in north eastern Atlantic to lower latitudes up to the Mediterranean Sea for parturition.

scholarly journals The small polychaete Platynereis dumerilii revealed as a large species complex with fourteen MOTUs in European marine habitats

2021 ◽  
Vol 4 ◽  
Author(s):  
Marcos A. L. Teixeira ◽  
Arne Nygren ◽  
Ascensão Ravara ◽  
Pedro E. Vieira ◽  
José Carlos Hernández ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Molecular Techniques ◽  
Index Number ◽  
Large Species ◽  
Ne Atlantic ◽  
Lunar Periodicity ◽  
Marine Habitats ◽  
Ecological Features ◽  
Platynereis Dumerilii ◽  
The Mediterranean

Recent studies reporting complexes of cryptic or pseudo-cryptic species with narrow geographic distributions have been challenging the cosmopolitan status of a fair number of marine benthic invertebrates. Morphologically similar species are often overlooked but molecular techniques have been extremely effective in signalling potential hidden diversity which, complemented with further detailed examination, might reveal unique morphological and ecological features. Evidence of morphological stasis, where no clear and stable morphological differences are apparent, can be exemplified by the annelids Platynereis dumerilii (Audouin & Milne Edwards, 1833) and Platynereis massiliensis (Moquin-Tandon, 1869). These sibling species, usually found among algae in marine intertidal and subtidal habitats, can only be distinguished by their different reproductive strategies and life histories. The former is gonochoric, with a single reproductive event in life (semelparous) transforming into a pelagic epitokous form called heteronereis, has free spawning synchronized by lunar periodicity and a larval stage with planktotrophic development; while the latter shows no epitokous transformation and is a protandrous hermaphrodite, characterized by egg brooding and lecithotrophic larval stages with a semi-direct development. In order to verify the possible existence of additional hidden Platynereis species within the P. dumerilii morphotype, we used a multi-locus approach to investigate 26 populations along Europe from the NE Atlantic and the Macaronesia islands (Azores, Madeira and Canaries) to the Western and Eastern Mediterranean Sea. We concatenated the mtDNA COI-5P, rDNA 16S and 28S-D2 sequences and performed a phylogenetic analysis through Bayesian inference (BI). To depict Molecular Operational Taxonomic Units (MOTUs), we applied three delimitation methods (ABGD, bPTP and GYMC) to the concatenated alignment, except for COI where we also applied the Barcode Index Number (BIN), implemented in BOLD, which is exclusive to this locus. Consensus MOTUs were defined based on the majority rule and, in case of draw, the most conservative MOTUs were chosen. We detected at least 14 MOTUs with 23.1% COI mean K2P distance (6.6 - 32.6%). The BI tree is split into three major clades (Clade A: MOTUs 1-3, Clade B: MOTUs 4-9 and Clade C: MOTUs 10-14), with MOTU 3 appearing to represent P. dumerilii sensu stricto and MOTU 9 P. massiliensis. This assumption is based on data from the Type locality and a previous study by Wage et al. (2017), which combined phylogeographic (COI barcode region), reproductive biology and life-history observations on some selected Platynereis populations thriving in the vent areas from the Italian islands of Ischia and Vulcano. Major Cade C seems to be pseudo-cryptic as some visible differences can be found in the specimens, as for example, the size of the tentacular cirri and lack of dorsal pigmentation, in contrast with Clades A and B, where only differences in pigmentation types were found so far. The Spanish archipelago of the Canary Islands and the whole Mediterranean Sea seem to be a cryptic hotspot. Five MOTUs are unique to the Macaronesia and five sympatric MOTUs are present in the Gran Canaria and La Palma islands alone. Additionally, three lineages were present exclusively in the Mediterranean with four sympatric MOTUs spotted in the southeast of Spain (Calpe) and the Greek island of Crete. Three out of four NE Atlantic MOTUs are shared with the Mediterranean with one exclusive to this part of the continent. Failure to recognise this hidden biodiversity may compromise the accuracy and the interpretation of biomonitoring data or other relevant ecological studies. Integrative taxonomy is thus essential to solve these uncertainties and to allow naming the involved undescribed species. Otherwise, most molecular data providing enough support for species hypothesis will continue to be unused, and large fractions of biodiversity will persist unnoticed.

Aeromonas dhakensis pneumonia and sepsis in a neonate Risso’s dolphin Grampus griseus from the Mediterranean Sea

2015 ◽  
Vol 116 (1) ◽  
pp. 69-74 ◽  
Author(s):  
L Pérez ◽  
ML Abarca ◽  
F Latif-Eugenín ◽  
R Beaz-Hidalgo ◽  
MJ Figueras ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Grampus Griseus ◽  
The Mediterranean ◽  
Risso's Dolphin
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