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Hydrogeographical Characteristics of South Croatia

Croatian Geographical Society; [email protected]
Publication Date
  • Hidrogeografske Značajke
  • Južna Hrvatska
  • Hydrogeographical Characteristics
  • South Croatia


actaAdriat47(1).indd ISSN: 0001-5113 AADRAY ACTA ADRIAT., 47 (1): 5 - 11, 2006 UDC: 597.5:591.134(282.24 Neretva) Original scientific paper Maturation, reproduction and recruitment of the sand smelt, Atherina boyeri Risso, 1810 (Pisces:Atherinidae) in the estuary of Mala Neretva River (southeastern Adriatic, Croatia) Vlasta BARTULOVIĆ1*, Branko GLAMUZINA1, Alexis CONIDES2, Ana GAVRILOVIĆ 1 and Jakov DULČIĆ3 1 University of Dubrovnik, Department of Aquaculture, Ćira Carića 4, 20000 Dubrovnik, Croatia 2 Hellenic Centre for Marine Research, Agios Kosmas, Hellinikon, 16604 Athens, Greece 3 Institute of Oceanography and Fisheries, P.O. Box 500, 21000 Split, Croatia *Corresponding author, e-mail: [email protected] Characteristics of maturation and recruitment of the sand smelt, Atherina boyeri, from the Mala Neretva River estuary in the southeastern Adriatic, Croatia in 2001/2, are presented. The average gonadosomatic index (GSI) during a 12-month period was 1.59% for females and 2.1% for males. The highest value was in April, 5.4% for females and 4.7% for males. The smallest mature female was 5.2 cm total length. Fifty percent of the females were mature at 7.75 cm total length. New juveniles began to recruit in June and July and later appeared in fewer numbers. In general, the GSI was lower than in other sand smelt populations. The reasons are difficult to determine but might be partly explained by the high and unpredictable temperature and salinity variations in the researched area that have led to previously described disturbances of the sand smelt life cycle, as in feeding and a high incidence of spinal deformities. Key words: sand smelt, Atherina boyeri, maturation, recruitment, Mala Neretva River INTRODUCTION The sand smelt, Atherina boyeri Risso 1810, is common in the Mediterranean and adjacent seas and in the northeast Atlantic from the Azores to the northwestern coast of Scotland (QUIGNARD & PRAS, 1986). It is a small, short-lived, euryhal

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