First distribution record of the invasive copepod Oithona davisae Ferrari and Orsi, 1984, in the coastal waters of the Aegean Sea

2019 ◽  
Vol 40 (3) ◽  
Author(s):  
Tuba Terbıyık Kurt ◽  
Şengul Beşiktepe
Keyword(s):  
Coastal Waters ◽  
Aegean Sea ◽  
Oithona Davisae ◽  
Distribution Record

Oithona davisae: naturalization in the Black sea, inter-annual and seasonal dynamics, effect on the structure of the planktonic copepod community

2019 ◽  
Vol 59 (6) ◽  
pp. 1008-1015
Author(s):  
A. D. Gubanova ◽  
O. A. Garbazey ◽  
D. A. Altukhov ◽  
V. S. Mukhanov ◽  
E. V. Popova
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Native Species ◽  
Significant Decline ◽  
Acartia Tonsa ◽  
The Black Sea ◽  
Copepod Community ◽  
Oithona Davisae ◽  
Sevastopol Bay

Long-term (20032014) routine observations of zooplankton in Sevastopol Bay (the Black Sea) have allowed the naturalization of the invasive copepod Oithona davisae to be studied in the Black Sea coastal waters. Inter-annual and seasonal variability of the species and their impact on the native copepod community have been analyzed. The invasion of O. davisae and their undoubted dominance in terms of abundance were shown to alter the community structure but, at the same time, the abundances of the native species did not decrease, excepting the Black Sea earlier invader Acartia tonsa. A significant decline in A. tonsa numbers over the stages of O. davisae establishment and naturalization provided evidence of competition between the species. O. davisae have been demonstrated to gain competitive advantage over A. tonsa, that ensured their fast dispersal in the Black Sea, acclimatization in the new habitat and the successful competition over native species.

Mesozooplankton stable isotope composition in Cyprus coastal waters and comparison with the Aegean Sea (eastern Mediterranean)

2015 ◽  
Vol 154 ◽  
pp. 12-18 ◽  
Author(s):  
Cecelia C.S. Hannides ◽  
Soultana Zervoudaki ◽  
Constantin Frangoulis ◽  
Manfred A. Lange
Keyword(s):  
Stable Isotope ◽  
Coastal Waters ◽  
Isotope Composition ◽  
Eastern Mediterranean ◽  
Aegean Sea ◽  
Stable Isotope Composition

Long-term dynamics of the copepod invader Oithona davisae in coastal waters of the Black Sea

2016 ◽  
Vol 7 (4) ◽  
pp. 374-382 ◽  
Author(s):  
S. A. Seregin ◽  
E. V. Popova
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
The Black Sea ◽  
Oithona Davisae

scholarly journals Records of alien marine species in the shallow coastal waters of Chios Island (2009)

2009 ◽  
Vol 10 (2) ◽  
pp. 99 ◽  
Author(s):  
S. KATSANEVAKIS ◽  
K. TSIAMIS
Keyword(s):  
Alien Species ◽  
Coastal Waters ◽  
Aegean Sea ◽  
Marine Species ◽  
Benthic Species ◽  
Caulerpa Racemosa ◽  
Asparagopsis Taxiformis ◽  
Halophila Stipulacea ◽  
Percnon Gibbesi ◽  
Marine Alien Species

The shallow coastline of Chios Island was surveyed for the presence of any alien marine benthic species, during August 2009. Fourteen randomly selected sites were surveyed by snorkeling during standardized one-hour transects at depths between 0 and 10 m, and the presence of all identified alien benthic species was recorded. Six alien species were identified: Asparagopsis taxiformis, Caulerpa racemosa var. cylindracea, Stypopodium schimperi, Halophila stipulacea, Percnon gibbesi, and Siganus luridus. The green alga C. racemosa var. cylindracea was found in high densities in all the surveyed sites and was characterized as invasive in the island. The brown alga S. schimperi, the crab P. gibbesi, and the fish S. luridussustain established populations in the area. For three of the recorded marine alien species (S. schimperi, P. gibbesi, and S. luridus),Chios Island seems to be the northernmost margin of their geographical range in the Aegean Sea.

scholarly journals Two-way bioinvasion: tracking the neritic non-native cyclopoid copepods Dioithona oculata and Oithona davisae (Oithonidae) in the Eastern Mediterranean Sea

2021 ◽  
Vol 22 (3) ◽  
pp. 586
Author(s):  
XIMENA VELASQUEZ ◽  
ARSENIY R. MOROV ◽  
TUBA TERBIYIK KURT ◽  
DALIT MERON ◽  
TAMAR GUY-HAIM
Keyword(s):  
Water Temperature ◽  
Mediterranean Sea ◽  
Coastal Waters ◽  
Eastern Mediterranean ◽  
Morphological Characteristics ◽  
Eastern Mediterranean Sea ◽  
Levantine Sea ◽  
Oithona Davisae ◽  
Introduced Range ◽  
Almost All

Accelerated anthropogenic changes in the Eastern Mediterranean Sea (EMS) have facilitated the introduction, spread and establishment of invasive copepod species in this region. Here, we report the introduction of two non-native cyclopoid copepods Dioithona oculata and Oithona davisae for the first time in the Israeli coastal waters and describe their temporal variability. The species were identified by morphological characteristics, DNA barcoding and phylogenetic inference. Molecular identification and phylogenetic analysis supported the taxonomical identification, nevertheless, showed cryptic speciation within D. oculata, separating the Western Pacific and EMS clades. In the Israeli coastal waters, D. oculata presented a temporally restricted occurrence, appearing from September 2019 to December 2019 (30.0±0.7 – 21.0±1.1 °C) and October 2020 (28.0±0.7 °C). The highest abundances of D. oculata occurred in the autumn (October 2019 and 2020), when the water temperature reached 28.0 °C (7 and 10 ind. m-3, respectively). The lowest abundance occurred in December 2019 (0.35 ind. m-3), when the water temperature decreased to 21.0 °C, indicating that the thermal affinity of D. oculata for warm-temperate conditions, for reproduction and the maintenance of viable populations, has persisted in the introduced range. In contrast, O. davisae appeared almost all year around (17.0±0.5 – 28.0±0.7 °C). This species demonstrated peaks in abundance both in October 2019 and October 2020, when the water temperature reached 28.0 °C (406 and 92 ind. m-3), as well as when the temperature decreased to 17.0 °C (31 ind. m-3, February 2020), confirming its wide eurythermal tolerance. Based on our findings and previous observations, we suggest that D. oculata may have invaded the EMS through the Suez Canal and is now at the onset of its spread in the Mediterranean Sea, whereas O. davisae has been introduced via shipping, likely from the Northeast Atlantic, widely spreading and successfully establishing viable populations across the entire Mediterranean Sea, until the coastal Levantine Sea.

scholarly journals Catch composition of set net (fixed stake trap) fisheries in the coastal waters of Saros Bay, North Aegean Sea

2015 ◽  
Vol 32 (2) ◽  
pp. 53-58 ◽  
Author(s):  
Serhat Çolakoğlu ◽  
Adnan Tokaç ◽  
Ali İşmen ◽  
Hasan Yurdusev
Keyword(s):  
Coastal Waters ◽  
Aegean Sea ◽  
North Aegean ◽  
North Aegean Sea ◽  
Catch Composition

scholarly journals How diatom Cylindrotheca closterium vanquish invasive copepod Oithona davisae

2018 ◽  
Vol 3 (3) ◽  
pp. 77-85
Author(s):  
A. N. Khanaychenko
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
The Black Sea ◽  
Experimental Population ◽  
Dense Network ◽  
First Report ◽  
Cylindrotheca Closterium ◽  
Oithona Davisae ◽  
Negative Effect ◽  
Axis Passing

Some diatoms are rich food for herbivorous copepods, while others are toxic for their recruitment. No negative effect of diatom Cylindrotheca closterium was ever observed for copepods, and some estuarine copepods preferred it as a food. Data on grazing diatoms by abundant now in the Black Sea coastal waters invasive copepod Oithona davisae are still contradictory. Interaction of O. davisae and C. closterium, both having high colonizing potential and both typical for coastal waters, was studied in experimental culture. Two weeks after inoculation of C. closterium the cultured O. davisae was drastically fouled by globulous conglomerates of diatom cells. Diatom cells in “colonies” on copepod exoskeleton were interconnected by means of adhesive substances at one of their flexible ends at the point-wise areas at various parts of copepods exoskeleton, and the opposite flexible ends performed various circular roll-over fan-shaped movements around the axis passing through the point of their attachment. “Colonies” behaved as integrated aggressive organisms against any approaching flagellate and prevented normal locomotion of copepods. Herein we present the first report on epizoic behavior of C. closterium: quick disastrous colonization of alive copepods O. davisae by diatom “colonies” led to total extinction of cyclopoid experimental population while alive diatoms formed dense network on copepods degenerative tissues.

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