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Some morphometric features of congeneric pipefish species (Syngnathus abaster Risso 1826, Syngnathus acus Linnaeus, 1758) distributed in Lake Bafa (Turkey)

Sule Gurkan
Sule Gurkan
 et 
Deniz Innal
Deniz Innal
   | 21 sept. 2018
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Article Category: Original research paper
Publié en ligne: 21 sept. 2018
Pages: 239 - 247
Reçu: 03 nov. 2017
Accepté: 17 janv. 2018
DOI: https://doi.org/10.1515/ohs-2018-0023
© 2018 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

Study area (□: Kapikiri region in Lake Bafa)
Study area (□: Kapikiri region in Lake Bafa)

Figure 2

Length-weight relationship in S. abaster
Length-weight relationship in S. abaster

Figure 3

Length-weight relationship in S.acus
Length-weight relationship in S.acus

Selected studies and their results on the two species from Turkey and other parts of the world

Species Locality N Range a b r Reference
TL (cm) W (g)
S. abaster Strymon estuary 12 7.8–13.2 0.0003 3.156 0.962 Koutrakis & Tsikliras 2003
S. acus Porto-Lagos lagoon 5 8.3–12.4 0.0001 3.729 0.958
S. abaster Spain 1260 1.3–10.9 0.00068 2.922 0.970 Verdiell-Cubedo et al. 2006
S. abaster Iberian Peninsula 64 3.9–12.1 0–0.7 0.0004 3.1201 0.926 Morey et al. 2003
S. acus Moray firth 4 0.00006 3.527 Coull et al. 1989
S. acus Spain 225 11–29.3 0.00072 2.8831 0.958 Valle et al. 2003
S. acus İzmir Bay 570 3.3–25.6 0.01–12.29 0.0001 3.43 0.91 Gurkan & Taşkavak 2007
S. acus İzmir Bay 310 0.0001 3.43 0.89 Gurkan 2004
S. acus İzmir Bay 202 6.1–20.7 0.07–4.49 0.0001 3.63 0.97 Özaydin & Taşkavak 2006
S. abaster Arade estuary, southern Portugal 57 2.9–10.5 0.00015 3,53 0.963 Veiga et al. 2009
S. acus Arade estuary, southern Portugal 66 7.1–34.6 0.00020 3.33 0.989
S. abaster Candarli Bay (north Aegean Sea) 9 2.78–10.60 0.08–0.78 0.0015 2.859 0.739 Gurkan et al. 2010
S. acus Candarli Bay (north Aegean Sea) 77 5.40–21.20 0.06–4.98 0.0003 3.256 0.912
S. abaster Erdek Bay (Sea of Marmara, Turkey) 298 4.5–15.1 0.0002 3.181 0.901 Keskin & Gaygusuz 2010
S. acus Erdek Bay (Sea of Marmara, Turkey) 15 10.3–37.8 0.0004 3.069 0.964
S. abaster River Strymon (Northern Greece)Estuary 137 3.6–13.5 0.0002 3.42 0.982 Petriki et al. 2011
S. abaster Eastern Ionian Sea 419 2.2–22.1 0.00031 3.22 0.95 Liousia et al. 2012
S. acus Eastern Ionian Sea 390 2.6–24.8 0.00032 3.30 0.97
S. abaster Gökçeada Island 10 11.3–17 0.49–1.72 0.000 3.359 0.907 Altın et al. 2015
S. acus Gökçeada Island 12 11.4–25.5 0.04–6.75 0.000 3.592 0.956
S. acus Western Black Sea 280 15.6–39.2 0.0001 3.415 0.898 Yildiz et al. 2015
S. acus South Africa 133 4.6–21.6 0.00038 3.074 0.961 Harrison 2001
S. acus Croatia 22 7.6–13.9 0.0004 3.122 0.958 Dulčić & Glamuzina 2006
S. abaster Kremenchug Reservoir, 60 0.69–1.32 0.18–1.20 0.0004 3.131 0.865 Khrystenko et al. 2015
S. abaster 60 0.69–1.31 0.15–1.53 0.0003 3.241 0.778
S. abaster Dneprodzerzhinsk Reservoir 60 0.86–1.41 0.23–1.41 0.0003 3.167 0.919
S. acus Turkey 17 21.3–28.4 4.51–11.92 0.0003 3.115 0.926 Bok et al. 2011
S. acus Black Sea 4 25.7–33.9 2.19–13.97 Kasapoğlu & Düzgüneş 2014
S. abaster Tunisian waters 104 7–19.8 0.19–3.32 3.4 × 10–6 2.62 0.85 Ben Amor et al. 2011
S. acus Tunisian waters 267 7.1–20.7 0.13–3.83 3.07 × 10–6 2.64 0.86
S. abaster Iberian coast 579 3.7–11 0.02–1.0 0.00025 3.36 0.956 Vieria et al. 2014
S. acus Iberian coast 529 3.6–41.4 0.02–54.57 0.00020 3.34 0.980

Morphometric features of sexes, Syngnathus abaster (N – sample size; M – mean; SD – standard deviation)

Morphometric features Males Females p
N Range M ± SD (mm) N Range M ± SD (mm)
 Total Length 25 74–117 93.94 ± 14.79 44 72–130 97.58 ± 18.45 p > 0.05
 Head Length 25 8.76–15.08 11.38 ± 1.80 40 11.95–6.73 11.94 ± 2.87 p > 0.05
 Head Depth 25 2.35–4.24 3.08 ± 0.55 40 2.11–5.38 3.28 ± 0.900 p > 0.05
 Body Depth 24 1.26–4.62 2.74 ± 0.99 40 1.33–6.64 3.41 ± 1.75 p > 0.05
 Body Width 24 1.56–4.47 2.67 ± 0.59 40 1.88–3.86 2.88 ± 0.56 p < 0.05
 Mouth Width 25 0.90–1.66 1.30 ± 0.25 40 0.63–2.52 1.45 ± 0.54 p > 0.05
 Mouth Height 23 1.35–2.74 1.87 ± 0.36 40 1.12–3.24 1.90 ± 0.65 p > 0.05

Morphometric features of S. abaster and S. acus occurring in Lake Bafa (M – mean; SD – standard deviation)

Morphometric features Syngnathus abaster Syngnathus acus
 Range (mm) M±SD Range (mm) M±SD p
 Total Length 55–130 86.7 ± 7.80 54–125 92.7 ± 18.09 p > 0.05
 Head Length 6.4–16.3 10.19 ± 3.30 6.5–13.5 2.76 ± 2.25 p > 0.05
 Head Depth 1.4–5.4 2.70 ± 10.09 1.2–4.5 2.44 ± 14.60 p > 0.05
 Body Depth 1.0–6.6 2.48 ±1.31 0.7–5.1 2.04 ± 10.78 p < 0.05
 Body Width 1.6–4.5 2.86 ± 11.58 1.1–5.1 2.73 ± 12.51 p > 0.05
 Mouth Width 0.43–2.5 1.12± 18.28 0.3–2.4 0.94 ± 0.36 p < 0.05
 Mouth Height 1.1–2.6 2.20 ± 2.36 0.8–3.3 1.42 ± 21.9 p < 0.05

Length-length relationship values for specimens of S. abaster and S. acus (CI – Confidence Intervals; F – observed)

Variables R2 Formulas CI (95%) F p
Syngnathus acus Ln TL/HL 0.500 Y = –4.535 + 2.790x –6.328; –2.741 38.015 p < 0.05
Ln TL/BD 0.568 Y = 1.706 + 0.236x 1.228; 2.184 52.179 p < 0.05
Ln TL/BW 0.55 Y = 1.499 + 0.221x 1.052; –1.945 46.140 p < 0.05
Ln TL/HD 0.597 Y = –2.529 + 1.510x –3.327; 1.103 56.275 p < 0.05
Ln HL/MW 0.169 Y = 0.132 + 0.47x 0.36; –0.228 7.721 p < 0.05
Ln HL/MH 0.522 Y = –0.37 + 0.41x 0.188; 0.354 43.509 p < 0.05
Syngnathus abaster Ln TL/HL 0.778 Y = –1.109 + 0.189x 0.901; 1.289 131.028 p < 0.05
Ln TL/BD 0.809 Y = –4.210 + 0.376x 1.970; 2.743 152.915 p < 0.05
Ln TL/BW 0.367 Y = –1.040 + 0.325x –1.698; –0.382 20.888 p < 0.05
Ln TL/HD 0.745 Y = –1.718 + 0.215x –2.155; 0.897 105.071 p < 0.05
Ln HL/MW 0.642 Y = 0.986 + 0.564x 0.961; 0.422 64.571 p < 0.05
Ln HL/MH 0.219 Y = 1.006 + 0.020x 0.965; 1.046 10.095 p < 0.05

Morphometric features of sexes, Syngnathus acus (N – sample size; M – mean; SD – standard deviation)

Morphometric features Males Females p
N Range M ± SD (mm) N Range M ± SD (mm)
 Total Length 31 82–117 98.16 ± 12.32 76 73–125 99.35 ± 14.87 p > 0.05
 Head Length 31 9.88–13.91 11.88 ± 1.53 52 7.05–15.33 11.97 ± 2.43 p > 0.05
 Head Depth 31 2.56–3.83 3.16 ± 0.43 52 2.25–4.50 3.24 ± 0.64 p > 0.05
 Body Depth 31 1.27–4.10 2.77 ± 0.87 52 1.510–5.06 2.98 ± 1.11 p > 0.05
 Body Width 31 1.58–3.58 2.71 ± 0.59 52 2.16–4.51 3.30 ± 0.76 p < 0.05
 Mouth Width 31 0.72–2.36 1.28 ± 0.45 52 0.85–1.97 1.39 ± 0.34 p > 0.05
 Mouth Height 31 1.19–2.32 1.68 ± 0.34 52 1.27–3.34 2.01 ± 0.53 p > 0.05
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