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Is the body condition of the three-spined stickleback (Gasterosteus aculeatus) determined by the type of food consumed?

Anna J. Pawelec
Anna J. Pawelec
, 
Mariusz R. Sapota
Mariusz R. Sapota
 y 
Michał E. Skóra
Michał E. Skóra
   | 12 dic 2016
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Article Category: Original research paper
Publicado en línea: 12 dic 2016
Páginas: 588 - 599
Recibido: 12 ene 2016
Aceptado: 11 may 2016
DOI: https://doi.org/10.1515/ohs-2016-0048
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© Faculty of Oceanography and Geography, University of Gdańsk, Poland. All rights reserved.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Location of the study area and sampling sites in the western part of the Gulf of Gdańsk
Location of the study area and sampling sites in the western part of the Gulf of Gdańsk

Figure 2

Total length of G. aculeatus individuals and the Shapiro-Wilk test for normality
Total length of G. aculeatus individuals and the Shapiro-Wilk test for normality

Figure 3

Percentage of food items in stomachs of three-spined sticklebacks. In brackets – the average number of specimens per stomach. The grey color graph shows the composition of Copepoda divided into orders: 1 – Harpacticoida, 2 – Copepoda undet., 3 – Calanoida, 4 – Cyclopoida
Percentage of food items in stomachs of three-spined sticklebacks. In brackets – the average number of specimens per stomach. The grey color graph shows the composition of Copepoda divided into orders: 1 – Harpacticoida, 2 – Copepoda undet., 3 – Calanoida, 4 – Cyclopoida

Figure 4

G. aculeatus stomach fullness index
G. aculeatus stomach fullness index

Figure 5

Body condition index of fish caught during sampling (figures – sampling sites; colors – seasons: green – spring, blue – summer; * – group of smaller fish from Chałupy site); average and standard deviation of the Fulton index for fish from sampling sites
Body condition index of fish caught during sampling (figures – sampling sites; colors – seasons: green – spring, blue – summer; * – group of smaller fish from Chałupy site); average and standard deviation of the Fulton index for fish from sampling sites

Food selectivity indices (Ivlev 1955) for fish caught in the region of Hel (spring, summer) and Sopot (spring)

Sopot Hel Hel
spring summer
Copepoda 0.000 -0.074 -0.041
Cladocera 0.951 0.205
Nematoda -0.650
Crustacea
Mysidacea
Amphipoda
Insecta
Hydrozoa No data on specimens in the environmental samples from a similar time of the year
Annelida
Polychaeta
Bryozoa
Pisces
Arthropoda eggs
Fish eggs

Food items and frequency of their occurrence in the guts of three-spined sticklebacks

Food items ecological formation Sampling sites and seasons
Hel Sopot Chalupy
spring summer spring summer summer
Crustacea undet. 3 50 73
Copepoda undet. p 100 37 41 78 69
Calanoida p 94 42 6 80
Cyclopoida p 74 21 3 17
Harpacticoida b 97 21 6 34
Cladocera p 94 47 10 14
Evadne sp. p 65 21
Podon sp. p 42 26
Bosmina sp. p 42
Mysidacea undet. p 19
Mysis sp. p 3
Neomysis integer p 6 5
Ostracoda b 2
Amphipoda undet. b 16 32 28
Gammarus sp. b 17 3
Batyporeia sp. b 42 28 27
Pontoporeia sp. b 6 11 3 3
Idotea sp. b 2 3
Bryozoa b 3 6
Chirodomidae larva b 29 9
Gonothyrea sp. b 26 3 2
Nematoda b 74 17
Annelida undet. b 13 6 3
Hediste diversicolor b 16 14
Insecta undet. 23 37 63 22 14
Pisces undet. 3 3
Copepoda eggs p 94 32 41 24 14
fish eggs 19 58 44 7 17
plants 26 5 46 14
sand* 26 37 31 80 20
p – planktonic, b – benthic, * – non-organic food item but frequently observed
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