Gape size allometry in pike reflects variation between lakes in prey availability and relative body depth

Magnhagen, Carin; Heibo, Erik

doi:10.1046/j.0269-8463.2001.00576.x

Cited by 67 publications

(72 citation statements)

References 39 publications

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“…This pattern is similar to that found in northern pike, Esox lucius L. where the mouth size was correlated with body length on different lakes in Sweden (Magnhagen and Heibo 2001). Between different species, the variation in size of the feeding apparatus is commonly explained as an adaptation to the type of prey to enhance the ability of the predator to capture and ingest its prey.…”

Section: Discussionsupporting

confidence: 84%

Morphometric relations for body size and mouth dimensions for four fish species in the Strait of Gibraltar

Czerwinski

Gutiérrez‐Estrada²,

Soriguer³

et al. 2008

Acta Icth et Piscat

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Background. The deep-water longline fishery of the blackspot seabream, Pagellus bogaraveo, is an economically important fishery in the Strait of Gibraltar, which is a very complex transition ecosystem between the Mediterranean Sea and the Atlantic Ocean with an extreme spatial and temporal variability. This paper presents a series of morphometric relations for the four most important species in this fishery. Some ecological considerations about the results are also discussed. Materials and Methods. The data were collected during a gear selectivity study, using different sizes of hooks baited with sardine. Relations for weight-length, length-length, and mouth dimensions for blackspot seabream, Pagellus bogaraveo (Brünnich, 1768); Atlantic pomfret, Brama brama (Bonnaterre, 1788); blackbelly rosefish, Helicolenus dactylopterus (Delaroche, 1809); and Mediterranean horse mackerel, Trachurus mediterraneus (Steindachner, 1868) were estimated and compared with the ones reported for the same species from other areas. Results. The sample size varied from 89 for T. mediterraneus to 2180 for P. bogaraveo. The fitted L-W relations explained more than 81% of the variance. For P. bogaraveo and T. mediterraneus, the estimated allometric coefficient was higher than those reported for other areas, showing a faster increase in weight, in contrast to H. dactylopterus and B. brama that showed a slower increase in weight. Moreover, linear and highly significant relations between mouth size and fish length were found for P. bogaraveo, H. dactylopterus, and T. mediterraneus. Conclusions. In this study, the first record for total length-standard length relation for H. dactylopterus is reported based on real measurements. There has been no previous studies on the relation between the different mouth size dimensions for the studied species as well as for mouth size and body length relations for P. bogaraveo and H. dactylopterus. The difference between estimated and reported coefficients might be attributed to different environmental adaptations and to the size ranges used due to the gear-size selectivity.

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Section: Discussionsupporting

confidence: 84%

Morphometric relations for body size and mouth dimensions for four fish species in the Strait of Gibraltar

Czerwinski

Gutiérrez‐Estrada²,

Soriguer³

et al. 2008

Acta Icth et Piscat

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“…Mouth size is one of the most important factors determining foraging ability and consequently fish diet (Breck, 1993 ;Magnhagen and Heibo, 2001). Karpouzi and Stergiou (2003) have shown that bogue possesses the smallest mouth dimensions among 18 Mediterranean species (including a group of 12 omnivorous species).…”

Section: Discussionmentioning

confidence: 99%

Halfway up the trophic chain: development of parasite communities in the sparid fish Boops boops

et al. 2007

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We examined the patterns of composition and structure of parasite communities in the Mediterranean sparid fish Boops boops along a gradient of fish sizes, using a large sample from a single population. We tested the hypothesis that species forming the core of the bogue parasite fauna (i.e. species which have a wide geographical range and are responsible for recognizable community structure) appear early in the fish ontogeny. The sequential community development observed supported the prediction that core species appear in the fish population earlier than rare and stochastic species. There was also a strong correlation between the order of 'arrival ' of the species and their overall prevalence. Six key species were responsible for recognizable community structure across size/age cohorts ; the addition to this baseline community of key parasite species resulted in a nested structure that is linked to differential species abundance rather than fish size. Information on the life-cycles, distribution and host range of the parasites is used to explain the observed patterns of parasite community structure. We conclude that the small mouth size of B. boops coupled with suction feeding may provide a setting for passive sampling as a mechanism leading to non-random parasite community structure.

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“…Nilsson and Brönmark (2000) found that gape size was linearly related to total body length in pike population. Magnhagen and Heibo (2001) reported that the size of gape increased with total body length in pike samples. The prey body height (PBH) changed as a function of vertical and horizontal mouth gape in Lake Ladik.…”

Section: Discussionmentioning

confidence: 99%

“…The statistical significance of selection index value (V a ) was tested using the chisquared test (χ2-test). Values without subscripts are expressed as: (Magnhagen & Heibo, 2001;Dörner et al, 2003) were calculated using linear regression analysis. One-way analysis of the variance (ANOVA) was used to test the statistical significance of linear regression (Czerwinski et al 2008).…”

Section: Discussionmentioning

confidence: 99%

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Yazıcıoğlu¹,

Polat²,

Yılmaz³

2018

Turk. J. Fish. Aquat. Sci.

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This study was conducted to determine feeding biology and prey selection of pike inhabiting Lake Ladik (Ladik, Samsun). Sampling was carried out monthly between November 2009 and October 2010. The stomachs of 204 individuals were analyzed and 32.35% of them were empty. Feeding intensity varied by seasons and length group. Fullness index values were the lowest during summer and in large sized pike, while feeding intensity was the highest during autumn and in small specimens. Prey fish dominated the diet in all length groups throughout the year whereas feeding on invertebrates was limited to small pikes. For small, medium and large length individuals, the most preferred prey fish were Perca fluviatilis (V a = 0.139, χ2 = 3.86, P < 0.05), Chondrostoma regium (V a = 0.169, χ2 = 5.752, P < 0.05) and Abramis brama (V a = 0.337, χ2 = 22.731, P < 0.01), respectively. The pike exhibited a specialist feeding strategy on fish. The most important food items of pike were Scardinius erythrophthalmus, Perca fluviatilis and Abramis brama, respectively. Also, it was determined that there were significant positive relationships between prey dimensions-predator size and predator mouth sizes-predator length.

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Gape size allometry in pike reflects variation between lakes in prey availability and relative body depth

Cited by 67 publications

References 39 publications

Morphometric relations for body size and mouth dimensions for four fish species in the Strait of Gibraltar

Morphometric relations for body size and mouth dimensions for four fish species in the Strait of Gibraltar

Halfway up the trophic chain: development of parasite communities in the sparid fish Boops boops

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