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Age, growth and reproductive biology of the saddled seabream (Oblada melanura) in the North Aegean Sea, Eastern Mediterranean

Ismail Burak Daban
Ismail Burak Daban
, 
Ali Ismen
Ali Ismen
, 
Mukadder Arslan Ihsanoglu
Mukadder Arslan Ihsanoglu
 et 
Koray Cabbar
Koray Cabbar
   | 06 mars 2020
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Article Category: Research Article
Publié en ligne: 06 mars 2020
Pages: 13 - 22
Reçu: 19 juin 2019
Accepté: 09 sept. 2019
DOI: https://doi.org/10.1515/ohs-2020-0002
© 2020 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Von Bertalanffy growth curve of Oblada melanura for the whole data set
Von Bertalanffy growth curve of Oblada melanura for the whole data set

Figure 2

Age-converted catch curve for estimating the total mortality (Z) of Oblada melanura
Age-converted catch curve for estimating the total mortality (Z) of Oblada melanura

Figure 3

Logistic curve for estimating the size at first maturity (L50) for both sexes
Logistic curve for estimating the size at first maturity (L50) for both sexes

Figure 4

Temporal changes in the gonadosomatic index values (GSI) for Oblada melanura
Temporal changes in the gonadosomatic index values (GSI) for Oblada melanura

Figure 5

Sexual maturity stages of Oblada melanura. Stage 0–1: inactive, Stage 2–3: developing, Stage 4: ripe
Sexual maturity stages of Oblada melanura. Stage 0–1: inactive, Stage 2–3: developing, Stage 4: ripe

Figure 6

Relationship between mean absolute fecundity–total length and fecundity and age
Relationship between mean absolute fecundity–total length and fecundity and age

Age and length key for Oblada melanura occurring in the north Aegean Sea

Length Class(TL; cm) Age Total
1 2 3 4 5 6 7 8
11 1 1
12 1 1
14 3 3
15 6 3 9
16 8 4 12
17 2 9 4 15
18 15 9 24
19 19 23 42
20 12 37 1 50
21 14 40 1 55
22 9 48 4 61
23 32 5 2 39
24 20 10 3 33
25 6 8 2 16
26 2 3 1 1 7
27 1 1 2
29 1 1
Total 2 19 85 221 32 9 2 1 371
Mean length (cm) 12 15.9 20 22 24 25 27 29.2
Proportional growth (%) 33 23 11 11 5 5 10

Length–weight regression parameters for males, females and both sexes for Oblada melanura

N a b r2 s GrowthType
Female 187 0.0098 3.086 0.949 p > 0.05 A(+)
Male 139 0.0086 3.128 0.949 p > 0.05 A(+)
Both sexes 373 0.0091 3.108 0.954 p > 0.05 A(+)

Comparision of Von Bertalanffy growth parameters for Oblada melanura with previous studies

Authors Region Sex Length(TL) L∞(cm) K t0 Z M E Age
This study North Aegean Sea, Eastern Mediterranean F
M 11.6–29.2
Both 29.91 0.27 0.82 1.36 0.58 0.78 1–8
Mahmoud 2010 Abu Qir Bay Egypt Both 12.0–29.2 33.83 0.242 0.669 0.96 0.56 0.41 1–8
Pallaoro et al. 1998 Eastern Adriatic F 2.0–33.4 0.201
M 0.233
Both 34.13 0.75 1.08 0.47 0.56 1–11
Cetinic et al. 2002 Eastern Adriaitic FM 11.3–33.1
Cavallaro et al. 1985* Eastern Sicily Messina Strait 1–8
Cefali et al. 1987* Eastern Sicily Messina Strait 0.309 1–3

Comparision of length–weight relationship of Oblada melanura with previous studies

Authors Region Sex N Length Interval a b GT
This study North Aegean Sea, Eastern Mediterranean F 187 11.6–29.2 TL 0.0098 3.086 A(+)
M 139 14.6–27.6 TL 0.0086 3.128 A(+)
Both 373 11.6–29.2 TL 0.0091 3.108 A(+)
Karakulak et al. 2006 Gökçeada Island North Aegean Sea F 112 12.5–19.8 TL 0.0052 3.310 A(+)
M 145 12.1–19.8 TL 0.0047 3.347 A(+)
Both 316 9.1–19.8 TL 0.0034 3.463 A(+)
Can et al. 2002 Iskenderun Bay Eastern Mediterranean Both 22 15.6–27.0 TL 0.0322 2.697 A(-)
Gonçalves et al. 1997 South Portugal Western Mediterranean Both 23 22.0–24.0 TL 0.00000127 3.404 A(+)
Crechriou et al. 2012 French Catalan Coast Both 74 17.0–36.6 TL 0.127 2.89 A(-)
Bilge et al. 2014 South Aegean Sea Both 157 11.6–25.8 TL 0.0174 2.857 A(-)
Karachle and Stergiou 2008 North Aegean Sea, Eastern Mediterranean Both 56 12.6–22.7 TL 0.0124 3.0220 I
Borges et al. 2003 Algarve Southern Portugal Both 49 20.5–28.2 TL 0.0161 2.906 A(-)
Cengiz 2013 Gallipoli Peninsula and Dardanelles Both 97 12.7–26.1 TL 0.0180 2.89 A(-)
Mahmoud 2010 Abu Qir Bay Egypt Both 477 12.0–29.2 TL 0.017 2.934 A(-)
Pallaoro et al. 1998 Eastern Ardiatic F 2911 2.0–33.4 TL 0.0088 3.132 A(+)
M 2430 0.0113 3.017 I
Both 5987 0.0099 3.081 A(+)
Cavallaro et al. 1985 Eastern SicilyMessina Strait Both 353 1.0–14.0 SL 0.0157 3.246 A(+)
Cetinic et al. 2002 Eastern Adriatic Both 11.3–33.1 TL 0.0091 3.081 I
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