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 E.; İşinibilir, Melek

doi:10.1016/j.ecss.2007.06.009

Cited by 29 publications

(27 citation statements)

References 33 publications

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“…Copepods of the genus Acartia inhabit many coastal and offshore environments, where they are usually among the most abundant zooplankton taxa (Greenwood 1981;Hubareva et al 2008). This was also confirmed in the present study, given the predominance of A. lilljeborgii during most of the second half of the year.…”

Section: Discussionsupporting

confidence: 76%

Relationships between copepod community structure, rainfall regimes, and hydrological variables in a tropical mangrove estuary (Amazon coast, Brazil)

2015

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The influence of rainfall and hydrological variables on the abundance and diversity of the copepod community was investigated on a monthly basis over an annual cycle in the Taperaçu mangrove estuary. In general, the results show that there were no clear spatial or tidal patterns in any biological variables during the study period, which was related to the reduced horizontal gradient in abiotic parameters, determined mainly by the morphological and morphodynamic features of the estuary. Nevertheless, seasonal and monthly trends were recorded in both the hydrological data and the abundance of the dominant copepod species. In particular, Pseudodiaptomus marshi (6,004.6 ± 22,231.6 ind m -3 ; F = 5.0, p \ 0.05) and Acartia tonsa (905.6 ± 2,400.9 ind m -3 ; F = 14.6, p \ 0.001) predominated during the rainy season, whereas Acartia lilljeborgii (750.8 ± 808.3 ind m -3 ; U = 413.0, p \ 0.01) was the most abundant species in the dry season. A distinct process of succession was observed in the relative abundance of these species, driven by the shift in the rainfall regime, which affected hydrological, in particular salinity, and consequently the abundance of copepod species. We suggest that this may be a general pattern governing the dynamics of copepod populations in the estuaries of the Brazilian Amazonian region.

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Section: Discussionsupporting

confidence: 76%

Relationships between copepod community structure, rainfall regimes, and hydrological variables in a tropical mangrove estuary (Amazon coast, Brazil)

2015

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“…For comparison, Pseudodiaptomus annandalei from a lagoon near Wukan Bay tolerated gradual salinity increases from 22 to 35 psu and decreases from 22 to 5 psu (Chen et al 2006). Acartia tonsa (Lance 1963, Cervetto et al 1999, Hubareva et al 2008 and Eurytemora affinis (Lee & Petersen 2003) successfully survived gradual salinity changes over 20 psu under experimental conditions.…”

Section: Arctodiaptomus Salinusmentioning

confidence: 99%

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

Svetlichny¹,

Hubareva²,

Khanaychenko³

2012

Mar. Ecol. Prog. Ser.

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Mortality, respiration rate, and body mass density of the estuarine copepods Calanipeda aquaedulcis and Arctodiaptomus salinus and their eggs were studied over a wide range of salinities. Empirical hydrodynamic modeling was applied to calculate body mass density using the sinking speed of the copepods. According to the index of median lethal salinity (LS 50 ), the salinity tolerance ranges of C. aquaedulcis and A. salinus reared at 18 psu were 0.1 to 50 and 0.1 to 35 psu, respectively. No significant effect of salinity on the specific oxygen consumption rate was found in the range from 0.1 to 40 psu in both species, while mean body mass density increased iso-osmotically with water salinity from (mean ± SD) 1.053 ± 0.007 to 1.077 ± 0.005 g cm −3 in C. aquaedulcis and from 1.039 ± 0.004 to 1.062 ± 0.007 g cm −3 in A. salinus. However, body density contrast and sinking speed were stable in both species, allowing them to avoid buoyancy problems with changing salinity. The mean mass density of resting eggs in A. salinus gradually increased isoosmotically following gradual changes in salinity. In contrast to resting eggs, the mass density of subitaneous eggs was not altered by changes in the surrounding salinity, suggesting a hysteresis response in these eggs.

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“…The Black Sea population of A. clausi, an epiplanktonic, neritic copepod, is found in coastal areas to as deep as 50-70 m below sea level (Kovalev et al, 1998b;Hubareva et al, 2008). The species shows limited migration activity in the Black Sea because of its daily feeding rhythm (Besiktepe, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Üstün¹,

Bat²

2014

Turk. J. Fish. Aquat. Sci.

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The egg production rate (EPR) of Acartia (Acartiura) clausi was measured between January and December 2008 in Sinop Inner Harbor (southern Black Sea). During the study period, EPR were found to be generally low varying between 2.04±0.43 (20 October) and 19.41±1.73 eggs/female.day (26 March). The mean EPR was recorded 8.62±1.02 eggs/female.day. The results have shown that water temperature and chlorophyll-a concentration are factors that affect the EPR of A. clausi; however, these factors are not always sufficient alone to explain the EPR in Sinop Inner Harbor.

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Fate of the Black Sea Acartia clausi and Acartia tonsa (Copepoda) penetrating into the Marmara Sea through the Bosphorus

Cited by 29 publications

References 33 publications

Relationships between copepod community structure, rainfall regimes, and hydrological variables in a tropical mangrove estuary (Amazon coast, Brazil)

Relationships between copepod community structure, rainfall regimes, and hydrological variables in a tropical mangrove estuary (Amazon coast, Brazil)

Calanipeda aquaedulcis and Arctodiaptomus salinus are exceptionally euryhaline osmoconformers: evidence from mortality, oxygen consumption, and mass density patterns

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