DIETARY OVERLAP BETWEEN INVASION CTENOPHORA (M . LEIDYI ) AND ANCHOVY (C. ENGRAULIFORMIS) IN THE SOUTHERN PARTS OF CASPIAN SEA

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DARVISHI F.; ESMAEILI SARI A.; FARSHCHI P.

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Paper Information

Journal: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST) Year:2004 | Volume:1 | Issue:2 Page(s): 89-96

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Information Journal Paper

Title

DIETARY OVERLAP BETWEEN INVASION CTENOPHORA (M . LEIDYI ) AND ANCHOVY (C. ENGRAULIFORMIS) IN THE SOUTHERN PARTS OF CASPIAN SEA

Author(s)

DARVISHI F. | ESMAEILI SARI A. | FARSHCHI P. | Issue Writer Certificate

Keywords

ANCHOVY SPRAT

CLUPEONELLA ENGRALIFOURMIS

CTENOPHORE

DIETARY OVERLAP

FEEDING COMPETITION

MENEMIOPSIS LEIDYI

SCHOENER INDEX

Abstract

Mnemiopsis leidyi, native to America, Invaded the Caspian Sea in 1999. By the end of 2000, the entire sea was accupied with them. In parallel, a sharp decline in pelagic fish such accurrred.This survey was studied the relationship between the M. leidyi and this decline. Dietary analysis was conducted on ANCHOVY SPRAT (Clupeonnela engrauliformis) and M. leidyi from August 2001 to October 2002 in the coastal water in the southern parts of Caspian Sea, in Iran. M. leidyi was caught by plankton net, (the mesh size ~5 mm), at three depth at 5, 10 and 15 m. Sprat was caught by fisheries boat at Babolasar fishery harbor. Samples were not fixed in M. leidyi common fixative, 96% Ethanol were used. The SCHOENER INDEX analysis reflected a similar diet composition of both species, with an critical level of overlap (>89 in Babolsar samples and >84 in Noushahar samples). This competition is one of the reasons for the decline of ANCHOVY SPRAT. also, the results show M. leidyi is feeding on fish eggs, but effects of this factor on anchovy population is less than FEEDING COMPETITION. Controlling of M. leidyi population is reducing the pressure of its invasion and the effective approach is introduces a predator to the Caspian Sea.

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APA: Copy

DARVISHI, F., ESMAEILI SARI, A., & FARSHCHI, P.. (2004). DIETARY OVERLAP BETWEEN INVASION CTENOPHORA (M . LEIDYI ) AND ANCHOVY (C. ENGRAULIFORMIS) IN THE SOUTHERN PARTS OF CASPIAN SEA . INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), 1(2), 89-96. SID. https://sid.ir/paper/284873/en

Vancouver: Copy

DARVISHI F., ESMAEILI SARI A., FARSHCHI P.. DIETARY OVERLAP BETWEEN INVASION CTENOPHORA (M . LEIDYI ) AND ANCHOVY (C. ENGRAULIFORMIS) IN THE SOUTHERN PARTS OF CASPIAN SEA . INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST)[Internet]. 2004;1(2):89-96. Available from: https://sid.ir/paper/284873/en

IEEE: Copy

F. DARVISHI, A. ESMAEILI SARI, and P. FARSHCHI, “DIETARY OVERLAP BETWEEN INVASION CTENOPHORA (M . LEIDYI ) AND ANCHOVY (C. ENGRAULIFORMIS) IN THE SOUTHERN PARTS OF CASPIAN SEA ,” INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY (IJEST), vol. 1, no. 2, pp. 89–96, 2004, [Online]. Available: https://sid.ir/paper/284873/en

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