Salinity tolerance of Calanus euxinus in the Black and Marmara Seas

Download

index.pdf

Date

2010-01-01

Author

Svetlichny, Leonid
Hubareva, Elena
Isinibilir, Melek
Kıdeyş, Ahmet Erkan
Belmonte, Genuario
Giangrande, Elisa

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

282
views

81
downloads

We investigated how stenohalinic Black Sea Calanus euxinus, when migrating to the north-eastern Marmara Sea, can adapt to the pronounced salinity gradient there. During field observations (2005 to 2008) females of Calanus euxinus with significantly smaller body length (compared with those inhabiting the brackish Black Sea at 17 to 18 psu) were found in the deep, high-saline (similar to 38.5 psu) layers of the Marmara Sea. Similar diameters of eggs laid by small- and large-sized females and similar respiration rates in nauplii hatched from these eggs indicated the Black Sea origin of the C. euxinus population found in the Marmara Sea. To understand the morphological and physiological changes in C. euxinus during acclimation to high salinity, we studied the effect of salinity on behaviour, food consumption, growth patterns, hatching success and respiration rate of C. euxinus individuals collected in the Black and Marmara Seas. It was shown that the range of salinity tolerance for adult C. euxinus (17 to 30 psu) from the Black Sea was extended gradually to 40 psu after 1 d of acclimation to the high salinity of the Marmara Sea. Long-term parental salinity acclimation facilitates survival of eggs descending through the salinity gradient of the Marmara Sea, from brackish upper layers to deep, high-saline strata, or eggs laid in deep layers. While weight-specific respiration rates at the same temperature did not differ for C. euxinus juveniles from the Black and Marmara Seas, they were similar to 2 times higher in preadults and adults from the Marmara Sea than from the Black Sea. This may be the reason for the decrease in length and weight increments of these stages probably leading to the small-sized individuals of the seasonal C. euxinus population inhabiting the Marmara Sea.

Subject Keywords

Calanus euxinus, Salinity tolerance, Behaviour, Hatching success, Respiration, Black Sea, Marmara Sea

URI

https://hdl.handle.net/11511/32482

Journal

MARINE ECOLOGY PROGRESS SERIES

DOI

https://doi.org/10.3354/meps08475

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Vertical distribution of marine cyanobacteria Synechococcus spp. in the Black, Marmara, Aegean, and eastern Mediterranean seas Uysal, Zahit (2006-01-01) The vertical distributions of the unicellular cyanobacteria Synechococcus were studied in several highly contrasting seas: the Black Sea, Sea of Marmara, Aegean Sea, and Mediterranean Sea. Cell abundances varied significantly on both vertical and horizontal scales in all physically and spatially discrete water masses. Epifluorescence microscope cell counts from all seas clearly showed that majority of the population remains suspended in the surface-mixed layer and decreases gradually towards the base of the...
Basement structure and architecture of the Black Sea Basin Kaymakcı, Nuretdin; Horn, Brian (null; 2018-01-28) Black Sea consists of two separate back arc basins which opened at different times during the Cretaceous in response to northward subduction of the Neo-Tethys Ocean. The paucity of well data, complex geometries and seismic imaging challenges mean that questions remain regarding the basement architecture though most authors accept that, at least in part, both these basins are floored by oceanic crust, even though there are no magnetic stripes. Interpretation of deep, long offset seismic data (imaging to more...
What is the Impact of Lessepsian Species on Eastern Mediterranean Fisheries? Lefkaditou, Evgenia; Abdelaty, Mohamed; Bariche, Michel; Corsini-Foka, Mariolina; Dimech, Mark; Economidis, Panagiotis; Gücü, Ali Cemal; Kalogirou, Stefanos; Konnaris, Kostas; Lahouf, Imad; Madi, Abdalnaser; Majdalani, Samir; Mahmoud, Hatem Hanafy; Michailidis, Nikolas; El Mokdad, Dahej; Nader, Manal; Qamheyih, Mohamed; Orsi-Relini, Lidia; Pagiatas, Giorgos; et.al. (2011-10-29) The migration of Lessepsian species, which was the result of the opening of the Suez Canal in 1869 and further facilitated by human activities and environmental conditions, seems to play a key role for fisheries particularly in the Levant basin. However, there is still lack of accurate data for most of the Lessepsian species in order to evaluate their positive or negative effect to the fisheries catches and local fish stocks. The Project "Scientific and Institutional Cooperation to Support Responsible Fishe...
Seasonal Changes in the Composition and Abundance ofZooplankton in the Seas of the Mediterranean Basin Kovalev, Av; Mazzocchı, Mg; Toklu Alıçlı, Benin; Skryabın, Va; Kıdeyş, Ahmet Erkan (2003-01-01) Seasonal changes in the composition, abundance and biomass of zooplankton in the seas of the Mediterranean basin (the Mediterranean, Black and Azov seas) have been reviewed using our own data and data from the literature. In the deep-water central regions of the seas, the seasonal cycle of zooplankton abundance is characterised by one maximum occurring in spring or summer. In the coastal regions, two to three peaks (spring, summer and autumn) exist for the zooplankton abundance. The amplitude of seasonal fl...
Fate of the Black Sea Acartia clausi and Acartia tonsa (Copepoda) penetrating into the Marmara Sea through the Bosphorus Hubareva, Elena; Svetlichny, Leonid; Kıdeyş, Ahmet Erkan; Isinibilir, Melek (2008-01-01) In October 2005 spatial distribution of live and dead Acartia clausi and Acartia tonsil was studied in the Black and Marmara Seas and near the Marmara Sea inlet of the Bosphorus, in order to understand their fate upon transportation between two seas. The morphometric characteristics in both species from all studied areas, and the decreased abundance of A. clausi and A. tonsa from the Black Sea towards the Marmara Sea indicate that the Marmara Sea Acartia populations are formed by recruitment from the Black ...

Citation Formats

L. Svetlichny, E. Hubareva, M. Isinibilir, A. E. Kıdeyş, G. Belmonte, and E. Giangrande, “Salinity tolerance of Calanus euxinus in the Black and Marmara Seas,” MARINE ECOLOGY PROGRESS SERIES, pp. 127–138, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32482.