Pelagic larval history dynamics of two Sparid species from North Aegean Sea based on otolith microstructure analyses


DABAN İ. B. , İŞMEN A.

CAHIERS DE BIOLOGIE MARINE, vol.63, no.2, pp.139-150, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 2
  • Publication Date: 2022
  • Doi Number: 10.21411/cbm.a.ab6d575d
  • Journal Name: CAHIERS DE BIOLOGIE MARINE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Geobase, Veterinary Science Database
  • Page Numbers: pp.139-150
  • Keywords: Microincrement, Larvae, Growth, Aegean Sea, Annular seabream, Blockspot seabream, MERLUCCIUS-MERLUCCIUS, SETTLEMENT MARKS, GROWTH, ABUNDANCE, DURATION, DIPLODUS, SEABREAM, HAKE
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

Knowledge about early life history dynamics is a vital tool for understanding life cycle, stock status, species biology and sustainability. To contribute to the knowledge of early life history traits, we examined and compared early life history parameters of Diplodus annularis and Pagellus bogaraveo based on otolith microstructure analyses. Forthis purpose, fish larvae individuals were collected from the natural living environment between May 2015 and March 2016 in shallow waters around Gokceada Island, North Aegean Sea. As fixative method and duration can cause damage to larval otoliths, pre-trials were conducted and 9 h formaldehyde fixation was determined as the most suitable. By means of weekly sampling intervals, hatching was ranged between May 4th and September 6th for D. annularis and from October 17th to December 2nd for P. bogaraveo, respectively. The spawning duration was relatively shorter for P. bogaraveo than for D. annularis. Higher daily growth rate and higher mortality rate were determined for D. annularis. Due to the same highest larvae length, it was observed that D. annularis reached this length in a shorter time. This may be caused by challenging winter conditions that P. bogaraveo faces.