Egg production rate, Feeding rate, gonad maturity and growth rate of calanus euxinus (copepoda) in the black sea

Download

129469.pdf

Date

2002

Author

Telli, Murat

Metadata

Show full item record

Item Usage Stats

62
views

72
downloads

he effects of gonad maturity and chlorophyll-a concentration on egg production rates of Calamus euxinus were examined in the Black Sea during October, 2000 and May, 2001. Egg production rates varied between 0 and 7.34 eggs female"1 d'1 in October, and between 1.82 and 7.02 eggs female"1 day"1 in May. Egg production rate of C. ewcinus was found to be closely related to the proportion of mature females. However, egg production rate appears to be independent of the chl-a concentration in both cruises. Ingestion rates of female C. euxinus ranged in between 2.08 - 40.54 ng chl-a female" day" in October and in between 6.68 - 64.93 ng chl-a female" day" in May. There was a positive correlation observed between ingestion rate and inchl-a concentration. However, there was no statistically significant relationship between egg production rate and ingestion rates. Reproductive growth rates of female C. euxinus were found to be negatively correlated to its dry weight. The mean growth rate was 0.01 d"1 in October and 0.03 d"1 in May. These results are much lower than previously recorded growth rates of broadcast-spawner copepods estimated under food saturation. This comparison may suggest that the present study was conducted under conditions of limiting resources.

Subject Keywords

Black Sea, Copepod, Calanus euxinus, Egg production rate, Growth rate, Feeding rate

URI

https://hdl.handle.net/11511/12847

Collections

Graduate School of Marine Sciences, Thesis

Suggestions

OpenMETU
Core

Egg production and growth rates of Calanus euxinus (Copepoda) in the Black Sea Besiktepe, S; Telli, M (Oxford University Press (OUP), 2004-05-01) Egg production rates (EPRs) of Calanus euxinus were measured in the Black Sea during October 2000 and May 2001. EPRs were generally low, on average 1.7 eggs female(-1) day(-1) in October 2000 and 3.9 eggs female(-1) day(-1) in May 2001. The relationships between EPRs and gonad maturity, depth-integrated chlorophyll a (Chl a) and mean surface layer temperature were examined. The EPRs were not related to depth-integrated Chl a, but were negatively correlated with temperature. EPRs were strongly related to the...
Diurnal gut pigment rhythm and metabolic rate of Calanus euxinus in the Black Sea Besiktepe, S; Svetlichny, L; Yuneva, T; Romanova, Z; Shulman, G (Springer Science and Business Media LLC, 2005-04-01) The vertical distribution, diel gut pigment content and oxygen consumption of Calanus euxinus were studied in April and September 1995 in the Black Sea. Gut pigment content of C. euxinus females was associated with diel vertical migration of the individuals, and it varied with depth and time. Highest gut pigment content was observed during the nighttime, when females were in the chlorophyll a (chl a) rich surface waters, but significant feeding also occurred in the deep layer. Gut pigment content throughout...
Effect of temperature on clearance rate daily ration and digestiontime of Mnemiopsis leidyi from the southern Caspian Sea M,, Rowshantabari; Finenko, Ga; Kıdeyş, Ahmet Erkan; Kiabi, B. (University of Guilan, 2012-06-01) The effect of temperature on the main feeding parameters of Mnemiopsis leidyi from the southern Caspian Sea was studied in 2002. The clearance rates and daily rations were estimated from laboratory experiments in a wide range of temperatures from 12 to 27 ?C for M. leidyi of 12?17 mm in length. Clearance rate values changed from 52.5 to 107.3 ml ind-1 h-1. The coefficient Q10 in temperature 12 - 20 ?C was higher than that in 20 - 27 ?C (3.81 and 1.91, respectively). The specific daily ration changed from 1....
Diel vertical distribution, and herbivory of copepods in the south-western part of the Black Sea Besiktepe, S (2001-04-01) The abundance and population structure of copepods were studied in the southwestern part of the Black Sea in May 1994, April and September 1995, April, June and September 1996. Vertical distribution and diel vertical migration of copepods were studied in April and September 1995 and June 1996. In addition, the grazing rates of three size classes of copepods-300-500, 500-1000 and 1000-2000 mum-were estimated in September 1995. The total abundance of copepods was higher in June samples due to the large contri...
Seasonality of Mesozooplankton in the Southern Black Sea off Sinop Between 2002 and 2004 Üstün, Funda; Bat, Levent; Şahin, Fatih; Birinci Özdemir, Zekiye; Kıdeyş, Ahmet Erkan (2016-12-01) The monthly and long-term fluctuations of mesozooplankton abundance, biomass, and taxonomic composition in the Sinop inner harbor (southern Black Sea) between 2005 and 2009 are presented in the present study. In total, 31 mesozooplankton taxa were identified during the study. The recorded average mesozooplankton abundance and biomass were 34,323 ± 7580 ind. m and 1208 ± 460 mg m in 2005, 95,063 ± 31,434 ind m and 1787 ± 604 mg m in 2006, 97,626 ± 12,141 ind m and 1034 ± 20 mg m in 2007, 91,918 ± 10,476 ind ...

Citation Formats

M. Telli, “Egg production rate, Feeding rate, gonad maturity and growth rate of calanus euxinus (copepoda) in the black sea,” Middle East Technical University, 2002.