Journal of
Oceanography and Marine Science

  • Abbreviation: J. Oceanogr. Mar. Sci.
  • Language: English
  • ISSN: 2141-2294
  • DOI: 10.5897/JOMS
  • Start Year: 2010
  • Published Articles: 61

Full Length Research Paper

Caspian Sea: Environmental controls and trophic webs interactions

Aboulghasem Roohi
  • Aboulghasem Roohi
  • Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P. O. Box 961, Sari, Iran
  • Google Scholar
Ahmet Erkan Kideys
  • Ahmet Erkan Kideys
  • Institute of Marine Sciences, Middle East Technical University, Erdemli, Turkey.
  • Google Scholar
Mehdi Naderi Jolodar
  • Mehdi Naderi Jolodar
  • Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P. O. Box 961, Sari, Iran
  • Google Scholar
Mohammadali Afraei Bandpei
  • Mohammadali Afraei Bandpei
  • Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P. O. Box 961, Sari, Iran
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Ali Mokarami Rostami
  • Ali Mokarami Rostami
  • Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), P. O. Box 961, Sari, Iran
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  •  Received: 16 January 2020
  •  Accepted: 15 April 2020
  •  Published: 31 August 2021

Abstract

Gelatinous zooplankton (GZ) populations are sensitive to climate change such as environmental perturbations, and spatial changes in their abundance and biomass may be associated with degraded environmental and biota conditions. Big data time series of GZ abundances and biomass were used to analyze the annual population dynamics of gelatinous zooplankton as well as mesozooplankton in the southern Caspian Sea, Iran from 1996, 2001-2006, 2008-2013 to 2018-2019. The ctenophore, Mnemiopsis leidyi population control by environmental factors was primarily a result of decreasing the concentration of zooplankton resulted to lower reproduction as well as temperature which was highest in August-September and lowest in winter time. On the other hand, the maximum catch of Kilka on the whole coast of Iran was equivalent to 95,000 tons in the year of 1996, and after that it was severely reduced to 15,000 tons in the year 2003 and afterward.

Key words: Gelatinous zooplankton, abundance and biomass, temperature, Caspian Sea.