Morphological study of Pagrus pagrus, Pagellus bogaraveo, and Dentex dentex (Sparidae) in the eastern Atlantic and the Mediterranean Sea

2004 ◽  
Vol 84 (2) ◽  
pp. 449-454 ◽  
Author(s):  
J. Palma ◽  
J.P. Andrade
Keyword(s):  
Discriminant Analysis ◽  
Mediterranean Sea ◽  
Atlantic Coast ◽  
Stepwise Discriminant Analysis ◽  
Classification Rate ◽  
Morphometric Characters ◽  
Dentex Dentex ◽  
The Mediterranean ◽  
Pagellus Bogaraveo ◽  
Pagrus Pagrus

Morphometric measurements were collected on red porgy, Pagrus pagrus, red seabream, Pagellus bogaraveo, and common dentex, Dentex dentex samples, from four countries along the south European Atlantic coast and the Mediterranean Sea (Portugal, Spain, Italy and Greece). Multivariate statistical analysis was used to discriminate populations. Stepwise discriminant analysis yielded a reduced variable set that identified significant differences among all four countries. The overall per cent-correct classification rate for the four samples from the stepwise discriminant analysis, based on 18 adjusted morphometric characters for Pagrus pagrus samples, and 14 (for both Pagellus bogaraveo and D. dentex) samples were 99·6%, 100% and 97·9%. There was a significant degree of morphological dissimilarity between countries (samples), for each species. A clear difference was displayed between the Atlantic and the Mediterranean samples, and a geographical gradient was found for the common dentex.

scholarly journals Further spreading of the non-indigenous bryozoan Celleporaria brunnea in the Mediterranean Sea: port to port morphological variations

2015 ◽  
Author(s):  
Jasmine Ferrario ◽  
Agnese Marchini ◽  
Martina Marić ◽  
Dan Minchin ◽  
Anna Occhipinti-Ambrogi
Keyword(s):  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Indigenous Species ◽  
Large Variability ◽  
Morphometric Characters ◽  
Morphological Variations ◽  
The North ◽  
Western Mediterranean Sea ◽  
The Pacific ◽  
The Mediterranean

The Pacific cheilostome bryozoan Celleporaria brunnea (Hincks, 1884), a non-indigenous species already known for the Mediterranean Sea, was recorded in 2013-2014 from nine Italian port localities (Genoa, Santa Margherita Ligure, La Spezia, Leghorn, Viareggio, Olbia, Porto Rotondo, Porto Torres and Castelsardo) in the North-western Mediterranean Sea; in 2014 it was also found for the first time in the Adriatic Sea, in the marina “Kornati”, Biograd na Moru (Croatia). In Italy, specimens of C. brunnea were found in 44 out of 105 samples (48% from harbour sites ad 52% from marinas). These data confirm and update the distribution of C. brunnea in the Mediterranean Sea, and provide evidence that recreational boating is a vector responsible for the successful spread of this species. Previous literature data have shown the existence of differences in orifice and interzooidal avicularia length and width among different localities of the invaded range of C. brunnea. Therefore, measurements of orifice and avicularia were assessed for respectively 30 zooids and 8 to 30 interzooidal avicularia for both Italian and Croatian localities, and compared with literature data, in order to verify the existence of differences in the populations of C. brunnea that could reflect the geographic pattern of its invasion range. Our data show high variability of orifice measures among and within localities: zooids with broader than long orifice coexisted with others displaying longer than broad orifice, or similar values for both length and width. The morphological variation of C. brunnea in these localities, and above all the large variability of samples within single localities or even within colonies poses questions on the reliability of such morphometric characters for inter and intraspecific evaluations.

Illustrated Key to Ampelisca Species from the North-Eastern Atlantic

1988 ◽  
Vol 68 (4) ◽  
pp. 659-676 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Denise Bellan-Santini
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Intertidal Zone ◽  
Atlantic Coast ◽  
The North ◽  
North Eastern ◽  
The Mediterranean

The genus Ampelisca comprises more than 150 species and is one of the more important benthic genus of marine amphipods. New species are regularly added (Barnard & Agard 1986; Bellan-Santini & Marques, 1986; Goeke, 1987). Ampelisca are found from the intertidal zone to abyssal depths but most of them live on the continental shelf. In spite of many studies, it is often difficult to distinguish some species which are morphologically similar. In the last ten years, twenty-two species have been described from the north-eastern Atlantic (BellanSantini & Kaïm-Malka, 1977; Bellan-Santini & Dauvin, 1981, 1986; Dauvin & Bellan-Santini, 1982, 1985; Bellan-Santini & Marques, 1986). Materials come from MNHN of Paris collection, collected by Chevreux (1894–1924) (Dauvin & Bellan-Santini, 1985, 1986) and specimens collected during the last 25 years. All these new species are described from the Atlantic coast from northern Brittany to the Sahara and from the Mediterranean Sea.

scholarly journals Sertularia marginata (Cnidaria: Hydrozoa) in the Mediterranean: an alien species in expansion?

2013 ◽  
Vol 14 (2) ◽  
pp. 384 ◽  
Author(s):  
M. M. GONZÁLEZ-DUARTE ◽  
C. MEGINA ◽  
M. BETHENCOURT
Keyword(s):  
Alien Species ◽  
Mediterranean Sea ◽  
Atlantic Coast ◽  
Western Mediterranean ◽  
Strait Of Gibraltar ◽  
Eastern Basin ◽  
Natural Zones ◽  
History Of ◽  
The Mediterranean ◽  
Natural Means

Mature and dense populations of the tropical hydroid species Sertulariamarginata were detected in the Alboran Sea (Western Mediterranean) and in the Atlantic coast of the Strait of Gibraltar. Until now, it had only been recorded in the eastern basin within the Mediterranean Sea.This species has previously been recorded in estuaries and anthropogenichabitats but, in the area studied here, we only found it in natural zones. These observations could indicate an early expansion and naturalization in the Mediterranean Sea. Due to its limited dispersion capacity by its own natural means and the history of its records, the observations provided here support the hypothesis of an arrival and a spread by anthropogenic vectors.A pathway of arrival and dispersion of alien species into the Mediterranean Sea is proposed for future monitoring: from Macaronesia (particularly Canary Islands) to the Atlantic coast of the Strait of Gibraltar and from here into the Mediterranean.

scholarly journals Growth rate rather than temperature affects the B / Ca ratio in the calcareous red alga <i>Lithothamnion corallioides</i>

2021 ◽  
Author(s):  
Giulia Piazza ◽  
Valentina A. Bracchi ◽  
Antonio Langone ◽  
Agostino N. Meroni ◽  
Daniela Basso
Keyword(s):  
Growth Rate ◽  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Growth Rates ◽  
Atlantic Coast ◽  
Light Availability ◽  
Marine Species ◽  
Coralline Algae ◽  
Seasonal Temperature ◽  
The Mediterranean

Abstract. The B / Ca ratio in calcareous marine species is informative of past seawater CO32− concentrations, but scarce data exist on B / Ca in coralline algae (CA). Recent studies suggest influences of temperature and growth rates on B / Ca, the effect of which could be critical for the reconstructions of surface ocean pH and atmospheric pCO2. In this paper, we present the first LA-ICP-MS analyses of Mg, Sr, Li and B in the CA Lithothamnion corallioides collected from different geographic settings and depths across the Mediterranean Sea and in the Atlantic Ocean. We produced the first data on temperature proxies (Mg, Li and Sr / Ca) and B / Ca in a CA species grown in different Basins (the Mediterranean Sea and the Atlantic Ocean), from shallow to deep waters (12 m, 40 m, 45 m and 66 m depth). We tested the B / Ca correlation with temperature proxies and growth rates, in order to evaluate their possible effect on B incorporation. Our results showed a growth rate influence on B / Ca, especially in the deepest sample (Pontian Isl., Italy; 66 m) and in the shallowest sample (Morlaix, Atlantic coast of France; 12 m), where the growth rates were respectively 0.11 mm/yr and 0.13 mm/yr and the B / Ca was respectively 462.8 ± 49.2 μmol/mol and 726.9 ± 102.8 μmol/mol. A positive correlation between B / Ca and the temperature proxies was found only in Morlaix, where the seasonal temperature variation (ΔT) was the highest (8.90 °C). These pieces of evidence suggest that growth rates, triggered by the different ΔT and light availability across depth, affect the B incorporation in L. corallioides.

New records of the non-native amphipod Ampithoe valida in Europe

2015 ◽  
Vol 8 ◽  
Author(s):  
M.A. Faasse
Keyword(s):  
North America ◽  
Mediterranean Sea ◽  
New Records ◽  
Atlantic Coast ◽  
Northern Europe ◽  
The World ◽  
Ampithoe Valida ◽  
The Mediterranean

The amphipod,Ampithoe valida, presumably native to the Atlantic coast of North America, has been recorded from several other parts of the world. Hitherto, the only published records from Europe originate from Portugal. Evidence is presented that this species has been introduced to northern Europe and the Mediterranean Sea as well.

Assessing the systematics of Tylodinidae in the Mediterranean Sea and Eastern Atlantic Ocean: resurrecting Tylodina rafinesquii Philippi, 1836 (Heterobranchia: Umbraculida)

2020 ◽  
Author(s):  
Robert Fernández-Vilert ◽  
Gonzalo Giribet ◽  
Xavi Salvador ◽  
Juan Moles
Keyword(s):  
Mediterranean Sea ◽  
Phylogenetic Analyses ◽  
Atlantic Coast ◽  
Food Preferences ◽  
Nuclear Gene ◽  
Anatomical Study ◽  
Single Species ◽  
Morphological Data ◽  
Eastern Atlantic Ocean ◽  
The Mediterranean

ABSTRACT The systematics of the gastropod clade Umbraculida, particularly the family Tylodinidae, has been a matter of debate. The Tylodinidae of the Mediterranean Sea are a case in point, with no comprehensive molecular assessment of diversity having been carried out to date. Several species and genera have been erected and synonymized in the course of the last two centuries and only a single species from each of the genera Tylodina and Anidolyta are considered to be present in these waters. In order to shed light on the controversial taxonomy of the group, we carried out both morpho-anatomical study and molecular analyses using fragments of two mitochondrial genes, cytochrome c oxidase subunit I and 16S rRNA, and the nuclear gene histone H3. Phylogenetic analyses and species delimitation tests clearly recovered two independent lineages of Tylodina from the Mediterranean and Eastern Atlantic coast, the type species T. perversa and the resurrected T. rafinesquii. We found clear differences in shell and radular morphology between both species, as well as differences in their habitat and food preferences. Interestingly, we found strong evidence that T. rafinesquii is sister to T. fungina from the Eastern Pacific rather than to the sympatric T. perversa. Furthermore, the new morphological data strongly encourage the suppression of the genus Anidolyta, which should be considered a junior synonym of Tylodina.

scholarly journals The non-indigenous Paranthura japonica Richardson, 1909 in the Mediterranean Sea: travelling with shellfish?

2014 ◽  
Vol 15 (3) ◽  
pp. 545 ◽  
Author(s):  
A. MARCHINI ◽  
J. C. SORBE ◽  
F. TORELLI ◽  
A. LODOLA ◽  
A. OCCHIPINTI-AMBROGI
Keyword(s):  
Mediterranean Sea ◽  
Adriatic Sea ◽  
Atlantic Coast ◽  
Tyrrhenian Sea ◽  
Lagoon Of Venice ◽  
Ligurian Sea ◽  
Long Time ◽  
The Mediterranean ◽  
North Adriatic Sea ◽  
Italian Coast

An anthurid isopod new to the Mediterranean Sea has recently been observed in samples from three localities of the Italian coast: the Lagoon of Venice (North Adriatic Sea), La Spezia (Ligurian Sea) and Olbia (Sardinia, Tyrrhenian Sea). The specimens collected showed strong affinity to a species originally described from the NW Pacific Ocean: Paranthura japonica Richardson, 1909. The comparison with specimens collected from the Bay of Arcachon (Atlantic coast of France), where P. japonica had been recently reported as non-indigenous, confirmed the identity of the species. This paper reports the most relevant morphological details of the Italian specimens, data on the current distribution of the species and a discussion on the pathways responsible for its introduction. The available data suggest that the presence of this Pacific isopod in several regions of coastal Europe might be due to a series of aquaculture-mediated introduction events that occurred during the last decades of the 1900s. Since then, established populations of P. japonica, probably misidentified, remained unnoticed for a long time.

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