Seasonal pattern of population dynamics, spawning activities, and diet composition of sardine ( Sardina pilchardus Walbaum) in the eastern Adriatic Sea

Objective & Hypothesis:Monthly samples from commercial catches obtained with purse seiners operating in the Croatian fishing grounds (easternAdriatic Sea) were collected throughout 2013, excluding January and December due to a fishing ban.

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Key Findings & Data:Overall, 1010 sardine individualswere analyzed.

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Conclusion & Impact:The observed seasonal alternations of allometric conditionfactor and fullness index additionally confirmed that sardines were in the best condition at the beginning of the spawning season, forwhich they prepared themselves by higher feeding intensity, leading to higher storage of consumed energy.

🔬Design:Research Article

📍Scope:2013 Verileri

⚙️Variables:Domain Parameters

Abstract

Monthly samples from commercial catches obtained with purse seiners operating in the Croatian fishing grounds (easternAdriatic Sea) were collected throughout 2013, excluding January and December due to a fishing ban. Overall, 1010 sardine individualswere analyzed. Total body length ranged from 10.4 to 17.6 cm (mean ± SD: 13.9 ± 1.28 cm). Slightly larger individuals were caughtduring autumn at the beginning of the spawning season. Analysis of length mass relationship showed that sardine specimens growisometrically (b = 3.063). Seasonal oscillations of condition factor indicated that the examined specimens were in the best condition atthe beginning of the spawning cycle. The analysis of stomach contents indicated that sardines preferred animal food (calanoid copepods,Oncaeaspp.,Farranula rostrata ), although a plant component was also present (Bacillariophyceae). Seasonality was also observed in dietanalysis, with diet changing in terms of feeding activity and prey quantity. The observed seasonal alternations of allometric conditionfactor and fullness index additionally confirmed that sardines were in the best condition at the beginning of the spawning season, forwhich they prepared themselves by higher feeding intensity, leading to higher storage of consumed energy.

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Cite This Article

VIDJAK, O., ZORICA, B., KE, V. C., KRALJEVIC, V., BRZULJA, G. (2022). Seasonal pattern of population dynamics, spawning activities, and diet composition of sardine ( Sardina pilchardus Walbaum) in the eastern Adriatic Sea. Turkish Journal of Zoology, Cilt: 41 - Sayı: 5, 892–900. https://ajindex.com/articles/616220

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References (14)

Alegría Hernández V (1983). Assessment of pelagic fish abundance along the eastern Adriatic coast with special regard to Sardine ( Sardina pilchardus Walb.) population. Acta Adriat 24: 55-95.
Bagenal TB, Tesch FW (1978). Age and growth. In: Bagenal TB, editor. Methods for the Assessment of Fish Production in Fresh Waters. IBP Handbook No. 3. London, UK: Blackwell Scientific Publications, pp. 101-136.
Berg J (1979). Discussion of the methods of investigating the food of fishes, with reference to a preliminary study of the food of Gobiusculus flavescens (Gobiidae). Mar Biol 50: 263-273.
Blaxter JHS, Hunter JR (1982). The biology of clupeoid fishes. Adv Mar Biol 29: 1-223.
Bolger T, Connolly PL (1989). The selection of suitable indices for the measurement and analysis of fish condition. J Fish Biol 34: 171-182.
Booth DJ, Keast JA (1986). Growth energy partitioning by juvenile bluegill sunfish, Lepomis macrochirus Rafinesque. J Fish Biol 28: 37-45.
Brosset P, Le Bourg B, Costalago D, Bănaru D, Van Beveren E, Bourdeix JH, Fromentin JM, Ménard F, Saraux C (2016). Linking small pelagic dietary shifts with ecosystem changes in the Gulf of Lions. Mar Ecol Prog Ser 554: 157-171.
Clarke KR (1993). Non-parametric multivariate analyses of changes in community structure. Aust J Ecol 18: 117-143.
Clarke KR, Warwick RM (1994). Changes in Marine Communities: An Approach to Statistical Analysis and Interpretation. Plymouth Climate Research 31. Plymouth, UK: Bourne Press Ltd. Costalago D, Garrido S, Palomera I (2015). Comparison of the feeding apparatus and diet of European sardines Sardina pilchardus of Atlantic and Mediterranean waters: ecological implications. J Fish Biol 86: 1348-1362.
Costalago D, Palomera I (2014). Feeding of European pilchard ( Sardina pilchardus ) in the northwestern Mediterranean: from late larvae to adults. Sci Mar 78: 41-54.
Cunha ME, Garrido S, Pissarra J (2005). The use of stomach fullness and colour indices to assess Sardina pilchardus feeding. J Mar Biol Assoc UK 85: 425-431.
Demirhindi Ü (1961). Sardalya ( Sardina pilchardus WALB.) balıklarında beslenme. İstanbul Üniversitesi Fen Fakültesi Hidrobiyoloji Araştırma Enstitüsü Yayınları Seri A 1-2: 60-67 (in Turkish). Froese R, Pauly D (2000). FishBase 2000:
Concepts, Design, and Data Sources. Los Baños, the Philippines: ICLARM. Ganias K, Somarakis S, Machias A, Theodorou A (2003). Evaluation of spawning frequency in a Mediterranean sardine population. Mar Biol 142: 1169-1179.
Garrido S, Ben-Hama