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Summer ichthyoplankton, food supply of fish larvae and impact of invasive ctenophores on the nutrition of fish larvae in the Black Sea during 2000 and 2001 Gordina, A.D.; Zagorodnyaya, J.A.; Kideys, A.E.; Bat, L.; Satilmis, H.H. (2005). Summer ichthyoplankton, food supply of fish larvae and impact of invasive ctenophores on the nutrition of fish larvae in the Black Sea during 2000 and 2001. J. Mar. Biol. Ass. U.K. 85(3): 537-548. https://dx.doi.org/10.1017/S002531540501146X In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769

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Beschikbaar in	Auteurs
VLIZ: Non-open access 352195 [ aanvragen ]

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Trefwoorden

Abundance Aquatic communities > Plankton > Zooplankton Aquatic communities > Plankton > Zooplankton > Ichthyoplankton Developmental stages > Larvae > Fish larvae Interspecific relationships > Predation MED, Black Sea MED, Ukraine, Crimea MED, Ukraine, Sevastopol Bay Crimea [Marine Regions]; Sevastopol Bay [Marine Regions]; Zwarte Zee [Marine Regions]

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Auteurs		Top
Gordina, A.D. Zagorodnyaya, J.A. Kideys, A.E.	Bat, L. Satilmis, H.H.

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Abstract

Qualitative composition and abundance of both ichthyoplankton and small forms of zooplankton were evaluated by field studies in the northern (the Crimea near Sevastopol) and southern (Sinop region and TEEZ) Black Sea during the summers 2000 and 2001. A tendency of increasing the species richness, abundance of fish eggs and larvae as well as zooplankton (which is the food for fish larvae) was observed over a period of Mnemiopsisleidyi and Beroeovata co-existence. The eggs and larvae of the Mediterranean migrants—bonito and bluefish appeared again in the coastal waters near Sevastopol, which testified to favourable conditions for the spawning and nutrition of these fish species and their larvae. Aborigen copepod Oithonanana was found in the Crimean coastal waters although earlier in the 1990s it had completely vanished. Although rare in the 1990s copepods Centropagesponticus and Paracalanusparvus appeared in inshore waters as well as Pontellids species. Observed increases in species number and abundance of both ichthyoplankton and small zooplankton ([less-than-or-equal]500 μm), which promoted survival and development of fish larvae, were attributed to reduced predatory impact of Mnemiopsis on prey zooplankton after the arrival of Beroe in the late 1990s. However, the influence of Mnemiopsis continued to be significant during the short period of its peak occurrence in late summer. When this period coincided with the appearance of fish larvae, a negative impact on their survival could be predicted due to a low concentration of food items for larvae feeding.

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