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Reproductive biology of the black-striped pipefish Syngnathus abaster Risso, 1827 (Pisces: Syngnathidae) in the Aegean Sea of Turkey

Burcu Taylan
Burcu Taylan
, 
Gozde Ekin Tatarhan
Gozde Ekin Tatarhan
, 
Ozlem Aksoy
Ozlem Aksoy
 oraz 
Mehmet Culha
Mehmet Culha
   | 13 mar 2018
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Article Category: Original research paper
Data publikacji: 13 mar 2018
Zakres stron: 67 - 74
Otrzymano: 22 cze 2017
Przyjęty: 12 wrz 2017
DOI: https://doi.org/10.1515/ohs-2018-0008
© 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

Mean GSI values of Syngnathus abaster over time
Mean GSI values of Syngnathus abaster over time

Figure 2

Frequency of mature males, mature females and juveniles in the samples in different seasons
Frequency of mature males, mature females and juveniles in the samples in different seasons

Figure 3

Frequency of hydrated-oocyte carrying females (OCF), pregnant males (PM), and males with empty brood pouches (MEP) in different seasons and relationships with water temperature
Frequency of hydrated-oocyte carrying females (OCF), pregnant males (PM), and males with empty brood pouches (MEP) in different seasons and relationships with water temperature

Figure 4

Frequency of oocyte diameters in the female ovary (n = 56)
Frequency of oocyte diameters in the female ovary (n = 56)

Figure 5

Total length-batch fecundity relationship in females
Total length-batch fecundity relationship in females

Figure 6

Relationship between the total length of males and the number of eggs carried
Relationship between the total length of males and the number of eggs carried

Figure 7

Different developmental stages in Syngnathus abaster; (A) brood pouch with eggs, (B–C) 7 days, (D) newborn head, (E) prelarvae; scale bars = 1 mm
Different developmental stages in Syngnathus abaster; (A) brood pouch with eggs, (B–C) 7 days, (D) newborn head, (E) prelarvae; scale bars = 1 mm

Five-point maturity scale (Holden and Raitt, 1974)

Stage State Description
I Immature Ovary and testis about 1/3 of the body cavity’s length. Ovaries pinkish, translucent; testis whitish. Ova not visible to naked eye.
II Maturing virgin and recovering spent Ovary and testis about 1/2 of the body cavity’s length. Ovary pinkish, translucent; testis whitish, more or less symmetrical. Ova not visible to naked eye.
III Ripening Ovary and testis is about 2/3 of the body cavity’s length. Ovary pinkish-yellow with granular appearance, testis whitish to creamy. No transparent or translucent ova visible.
IV Ripe Ovary and testis from 2/3 to full length of the body cavity. Ovary orange-pink with conspicuous superficial blood vessels. Large transparent, ripe ova visible. Testis whitish-creamy, soft.
V Spent Ovary and testis shrunken to about 1/2 of the body cavity’s length. Walls loose. Ovary may contain remnants of disintegrating opaque and ripe ova, darkened or translucent. Testis bloodshot and flabby.

Total length, total weight, Gonadosomatic Index values and sex ratio evaluation in the captured Syngnathus abaster female, male (with brood pouch, pregnant ones) and immature individuals. N: sample size; M: Mean; TL: total length in mm; W: weight in g; GSI: Gonadosomatic Index values; SD: Standard deviation) by seasons

FEMALE
Seasons N M TL ± SD (mm) M W ± SD (g) N GSI (%) ± SD ♀:♂
Autumn 7 114.00 ± 10.03 0.63 ± 0.24 7 0.97 0.35
Winter 8 111.00 ± 7.60 0.56 ± 0.20 8 3.07 1
Spring 23 110.00 ± 8.40 0.83 ± 0.20 23 6.86 2.09
Summer 56 113.00 ± 6.52 0.81 ± 0.12 56 6.54 1.40
Total (Range) 94 111.50 ± 7.35 0.78 ± 0.18 94 5.88 0.84
MALES
Seasons Male (Total) Pregnant male Male with brood pouch
N M TL ± SD (mm) M W ± SD (g) N M TL ± SD N M TL ± SD
Autumn 20 105.00 ± 10.20 0.42 ± 0.12 3 107.7 ± 13.3 17 103.9 ± 9.92
Winter 8 109.00 ± 11.90 0.53 ± 0.20 - - 8 79.18 ± 11.9
Spring 11 104.00 ± 8.70 0.78 ± 0.20 11 109.9 ± 8.22 - -
Summer 40 113.00 ± 10.49 0.95 ± 0.32 35 114.1 ± 11.5 5 110.4 ± 6.73
Total (Range) 79 109.90 ± 11.08 0.76 ± 0.36 49 112.8 ± 11.02 30 106.3 ± 10.16
IMMATURE
Seasons N M TL ± SD (mm) M W ± SD (g)
Autumn 8 79.25 ± 6.56 0.11 ± 0.04
Winter 4 81 0.10
Spring 0 - -
Summer 0 - -
Total (Range) 12 79.8 ± 5.30 0.11 ± 0.03

Seasonal variation of GSI for female Syngnathus abaster during the period from April 2013 to March 2014, the Aegean Sea, Turkey

♀ No. of fish Min. Max Mean ± SD 95% CI
Lower limit Upper limit
Autumn 7 0.27 1.73 0.97 ± 0.19 0.50 1.43
Winter 8 1.95 4.70 3.01 ± 0.39 2.09 3.93
Spring 23 2.01 23.36 6.86 ±1.13 4.51 9.21
Summer 56 1.74 14.99 6.54 ± 0.40 5.73 7.35

Physicochemical characteristics of sea water

Station 1 Station 2 Station 3 Station 4
T DO S T DO S T DO S T DO S
Spring 21.5 8.93 37.8 21.8 8.82 38.2 23.1 8.78 37.8 24.5 8.62 38.4
Summer 24.2 7.80 38.9 23.8 7.55 38.6 23.5 7.67 38.5 25.7 7.57 38.2
Autumn 18.6 9.13 38.1 18.6 9.40 37.7 18.2 9.36 38.4 18.5 9.10 38.8
Winter 15.5 10.31 37.5 16.1 10.12 34.3 15.3 10.11 34.2 17.2 10.9 38.2
eISSN:
1897-3191
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Chemistry, other, Geosciences, Life Sciences
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