scholarly journals The Ongoing Shift of Mediterranean Coastal Fish Assemblages and the Spread of Non-Indigenous Species

10.5772/50845 ◽  
2012 ◽  
Author(s):  
Stefanos Kalogirou ◽  
Ernesto Azzurro ◽  
Michel Bariche
Keyword(s):  
Fish Assemblages ◽  
Indigenous Species ◽  
Coastal Fish ◽  
Non Indigenous Species

Holocene fish assemblages provide baseline data for the rapidly changing eastern Mediterranean

The Holocene ◽  
2020 ◽  
Vol 30 (10) ◽  
pp. 1438-1450
Author(s):  
Konstantina Agiadi ◽  
Paolo G Albano
Keyword(s):  
Radiocarbon Dating ◽  
Trophic Structure ◽  
Fish Assemblages ◽  
Eastern Mediterranean ◽  
Marine Ecosystem ◽  
Fish Fauna ◽  
Suez Canal ◽  
Indigenous Species ◽  
The Mediterranean ◽  
Non Indigenous Species

The eastern Mediterranean marine ecosystem is undergoing massive modification due to biological invasions, overfishing, habitat deterioration, and climate warming. Our ability to quantify these changes is severely hindered by the lack of an appropriate baseline; most ecological datasets date back a few decades only and show already strong signatures of impact. Surficial death assemblages (DAs) offer an alternative data source that provides baseline information on community structure and composition. In this study, we reconstruct the marine fish fauna of the southern shallow Israeli shelf before the opening of the Suez Canal based on fish otoliths. We quantify the age of the otolith DAs by radiocarbon dating, and describe its taxonomic composition, geographic affinity, and trophic structure. Additionally, we test by radiocarbon dating the hypothesis that Bregmaceros, a presumed Lessepsian invader with continuous presence in the Mediterranean throughout the late Cenozoic, is a relict species. The otolith DA dates back to the mid-Holocene because 75% of the dated otoliths of the native species are older than the opening of the Suez Canal in 1869, suggesting that the DA is a proper baseline for quantifying modern impacts. Consistently, 97% of the otoliths and 88% of the species we collected belong to native Mediterranean species. The native anchovy Engraulis encrasicolus dominates the DAs, although gobiids are the most diverse group (14 species, 28%). The DAs show similar trophic structure to present-day pristine Mediterranean coastal fish assemblages. Two non-indigenous species are recorded here for the first time in the Mediterranean Sea, Amblygobius albimaculatus and Callogobius sp., highlighting the importance of DAs for detecting non-indigenous species. Finally, Bregmaceros otoliths are modern, not supporting the previous hypothesis that the taxon is a Pleistocene relict.

scholarly journals Juvenile pelagic fish assemblages in the coastal waters of Lebanon: Diversity, biological characteristics & landings

2019 ◽  
Author(s):  
Garabet Kazanjian
Keyword(s):  
Species Richness ◽  
Fish Assemblages ◽  
Niche Partitioning ◽  
Common Species ◽  
Indigenous Species ◽  
Northern Coast ◽  
First Maturity ◽  
Non Indigenous Species ◽  
New Recruits ◽  
Boops Boops

Small pelagic fishes constituted half of the Mediterranean landings and a considerable portion of the Lebanese catches. In this study, the purse seine fishery was analyzed between 2006 and 2007 in two sites along the northern coast of Lebanon.Thirty-six different fish species were collected, out of which seven constituted morethan 97% of the landings. Engraulis encrasicolus, Sardinella aurita and Sardinapilchardus composed 57.7%, 20.9% and 5.6% of the abundance of catches respectively and 31.3%, 19.2%, 9.2% of its biomass. Non-indigenous species comprised 7.2% of the total abundance and 18.7 % of the landing biomass. The fishery targeted mainly the new recruits (0+), and the vast majority of the catches were fishes below their size at first maturity. Diversity and species richness were high in the warmer in the months and low in the colder ones. Temperature and salinity were positively correlated with species richness, while the chlorophyll content of seawater was positively associated with diversity. Clear temporal patterns with distinct shifts of dominance within the landings were detected throughout the year for the most common species. Engraulids dominated catches from October to March, while the rest of the year was characterized by clupeids, Boops boops, and Scomber colias. A temporal niche partitioning seems to exist in the easternmost Mediterranean pelagic waters, possibly to minimize competition.

Meta-analysis on the ecological impacts of widely spread non-indigenous species in the Baltic Sea

2021 ◽  
pp. 147375
Author(s):  
Henn Ojaveer ◽  
Jonne Kotta ◽  
Okko Outinen ◽  
Heli Einberg ◽  
Anastasija Zaiko ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Meta Analysis ◽  
Ecological Impacts ◽  
Indigenous Species ◽  
The Baltic Sea ◽  
The Baltic ◽  
Non Indigenous Species

scholarly journals First Record of the Alien Species Procambarus virginalis Lyko, 2017 in Fresh Waters of Sardinia and Insight into Its Genetic Variability

Life ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 606
Author(s):  
Daria Sanna ◽  
Ilenia Azzena ◽  
Fabio Scarpa ◽  
Piero Cossu ◽  
Angela Pira ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Alien Species ◽  
Procambarus Clarkii ◽  
Mitochondrial Gene ◽  
First Record ◽  
Indigenous Species ◽  
Fresh Waters ◽  
Mediterranean Island ◽  
Marbled Crayfish ◽  
Non Indigenous Species

In the fresh waters of Sardinia (Italy), the non-indigenous crayfish species Procambarus clarkii has been reported from 2005, but, starting from 2019, there have been several reports of a new non-indigenous crayfish in southern and central areas of this Mediterranean island, and its morphology suggests that this species may be the marbled crayfish Procambarus virginalis. Forty-seven individuals of this putative species were analyzed, using the mitochondrial gene Cytochrome c Oxidase subunit I as molecular marker to identify this crayfish and investigate the level of genetic variability within the recently established population. Phylogenetic and phylogeographic analyses were carried out on a dataset including sequences from the Sardinian individuals and from all congenerics available in GenBank. Results showed that the new Sardinian crayfish belong to the species P. virginalis. All the sequences belonging to P. virginalis from European countries are identical, with only few exceptions found among Sardinian individuals. In conclusion, this paper highlights the occurrence of a new further alien species in the Sardinian fresh waters, which are already characterized by the high presence of non-indigenous species.

scholarly journals Economic and Environmental Impacts of Harmful Non-Indigenous Species in Southeast Asia

PLoS ONE ◽  
2013 ◽  
Vol 8 (8) ◽  
pp. e71255 ◽  
Author(s):  
Le T. P. Nghiem ◽  
Tarek Soliman ◽  
Darren C. J. Yeo ◽  
Hugh T. W. Tan ◽  
Theodore A. Evans ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Environmental Impacts ◽  
Indigenous Species ◽  
Non Indigenous Species

scholarly journals Non indigenous species settle down in the Taranto Seas

2004 ◽  
Vol 25 ◽  
Author(s):  
Francesco Mastrototaro ◽  
Antonella Petrocelli ◽  
Ester Cecere ◽  
Alfonso Matarrese
Keyword(s):  
Indigenous Species ◽  
Non Indigenous Species
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