Characteristics of the European Bitterling<i>Rhodeus amarus</i>(Cyprinidae) in the Rihios River, Greece

Koutrakis, E. T.; Kokkinakis, Antonis K.; Tsikliras, Athanassios C.; Eleftheriadis, Eleftherios

doi:10.1080/02705060.2003.9664003

Cited by 28 publications

(16 citation statements)

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“…Significant diet overlaps were observed only between topmouth gudgeon and gobiids and was due to chironomid larvae, which were important prey items in all these fishes, and the highest diet overlaps were between monkey and racer gobies. Bitterling were not used for the diet overlap assessment because their major diet items were non-animal food such as detritus and phytoplankton, which are common food for this species (Przybylski, 1996;Koutrakis et al, 2003) and are not supposed to be limiting in the reservoir. In contrast to this study, much higher overlaps of trophic niches were observed between topmouth gudgeon and roach (48−73%) and between topmouth gudgeon and rudd (86−92%) in small ponds in UK in a study based on stable isotope analysis (Jackson and Britton, 2013) and high diet overlaps result in the depressed somatic growth of roach (Britton et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Trophic interaction between topmouth gudgeon (Pseudorasbora parva) and the co-occurring species during summer in the Dniprodzerzhynsk reservoir

Didenko

Kruzhylina

2015

Knowl. Manag. Aquat. Ecosyst.

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Key-words:Dnieper reservoirs, topmouth gudgeon, invasive species, fish diets, trophic relationships Topmouth gudgeon, Pseudorasbora parva is the most common invasive fish in Europe, which can compete with the juveniles of valuable commercial fishes. The goal of this work is to study the diet of topmouth gudgeon and trophic relationships with some native fishes inhabiting the littoral zone of the Dniprodzerzhynsk reservoir. The obtained relatively low values of diet overlaps between topmouth gudgeon and other co-occurring cyprinids such as juvenile roach, Rutilus rutilus; silver bream, Blicca bjoerkna; rudd, Scardinius erythrophthalmus; Prussian carp, Carassius gibelio and bleak, Abramis brama, indicate that it is not a serious food competitor for them, especially commercially valuable ones. On the contrary, high diet overlaps were observed among some native cyprinids such as juvenile roach, silver bream, rudd, and bleak. The major prey items of topmouth gudgeon were Chydorus sphaericus and chironomids, whereas other cyprinids selected Bosmina spp. This peculiarity may be due to different vertical distributions of these fish in the littoral zone of the reservoir, where topmouth gudgeon inhabit near-bottom water layers, where they preyed on near-bottom and benthic zooplankters and chironomids, while juvenile roach, silver bream, rudd, and juvenile and adult bleak live in higher water layers, where they preyed on pelagic zooplankton. RÉSUMÉInteraction trophique entre le Pseudorasbora (Pseudorasbora parva) et les espèces coexistantes durant l'été dans le réservoir de Dniprodzerjynsk

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Section: Discussionmentioning

confidence: 99%

Trophic interaction between topmouth gudgeon (Pseudorasbora parva) and the co-occurring species during summer in the Dniprodzerzhynsk reservoir

Didenko

Kruzhylina

2015

Knowl. Manag. Aquat. Ecosyst.

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“…For further comparison with previous bitterling studies (Koutrakis et al, 2003;Patimar et al, 2010), only one egg dimension was measured, i.e. All images were analysed using LUCIA 5 image analysis software (Laboratory Imaging Ltd.).…”

Section: Fish Samplingmentioning

confidence: 99%

“…Solomon et al, 1984;Smith et al, 2000Smith et al, , 2004Koutrakis et al, 2003) and its annual fecundity (80 -250 eggs; Smith et al, 2004) was assessed prior to the spawning season. Solomon et al, 1984;Smith et al, 2000Smith et al, , 2004Koutrakis et al, 2003) and its annual fecundity (80 -250 eggs; Smith et al, 2004) was assessed prior to the spawning season.…”

Section: Introductionmentioning

confidence: 99%

“…The European bitterling Rhodeus amarus (Bloch, 1782) is an important study species for both evolutionary (Mills and Reynolds, 2003;Reichard et al, 2006Reichard et al, , 2007 and behavioural ecology (Smith et al, 2000(Smith et al, , 2004Konecˇna´et al, 2010) research. It is a small freshwater cyprinid fish with a short life span, typically ranging from one (Czech Republic; Konecˇna´and Reichard, 2011) to 5 years (Greece; Koutrakis et al, 2003). The bitterling has an unusual method of reproduction, using mussels of the family Unionidae as a spawning substrate.…”

Section: Introductionmentioning

confidence: 99%

“…In all previous studies dealing with aspects of bitterling reproduction, the fish is regarded as a species with determinate fecundity (e.g. Solomon et al, 1984;Smith et al, 2000Smith et al, , 2004Koutrakis et al, 2003) and its annual fecundity (80 -250 eggs; Smith et al, 2004) was assessed prior to the spawning season. In general, a fish species is considered as displaying determinate fecundity when the number of oocytes is fixed before the onset of the spawning season (Hunter and Macewicz, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Reproduction mode of European Bitterling (Rhodeus amarus,Bloch, 1782) determined through rapid oocyte counts and size determination using digital imaging

Konečná

2012

Journal of Applied Ichthyology

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Summary This study focuses on assessing the reproduction mode of an important model species for evolutionary and behavioural ecology by using digital image analysis: the European bitterling Rhodeus amarus (Bloch, 1782). Specifications of mode of reproduction were determined using oocyte size distribution, seasonal dynamics in mean oocyte diameter and total number of oocytes in ovary samples gained from April to July 2007. The rapid oocyte count was enabled by using lucia image analysis software, which also provided measurement and colour estimations of oocytes. Bitterling ovaries showed features typical for indeterminate spawners, i.e. a continuous distribution of oocyte size over the reproductive season and recruitment of new pre‐vitelogenic oocytes in the second half of the reproductive season. These results are consistent with the view that the European bitterling is a batch spawning fish with indeterminate fecundity.

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Thin‐Sectioned Otoliths Reveal Sexual Dimorphism and a 10‐Year Lifespan in the Endangered Pahrump Poolfish

Lackmann

Kettelhut

Paulson

et al. 2021

N American J Fish Manag

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Basic life history information can be useful for informing the management of protected species such as the Pahrump Poolfish Empetrichthys latos, a goodeid (Cyprinodontiformes) that is endemic to the Mojave Desert in southern Nevada, USA, and the last surviving remnant of Empetrichthys. Critically endangered and extirpated from its native range, Pahrump Poolfish has been managed among constructed refuge habitats since 1971. To better understand sex‐specific age demographics, we used thin‐sectioned otoliths to age 121 Pahrump Poolfish from one population, collected in June 2017. These samples suggested a maximum age of 10 years for females and 7 years for males, with a substantial portion of all fish greater than 4 years old. This is more than twice the previously reported maximum age for this species. We report on the inadequacy of reading whole otoliths, opercula, and scales for age analysis of this species. Based on thin‐sectioned otoliths, we also model growth in length as a function of age among individuals. We found significant sexual dimorphism across this fish’s ontogeny, which has implications for selecting an appropriate sex ratio for founding populations.

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Characteristics of the European BitterlingRhodeus amarus(Cyprinidae) in the Rihios River, Greece

Cited by 28 publications

References 10 publications

Trophic interaction between topmouth gudgeon (Pseudorasbora parva) and the co-occurring species during summer in the Dniprodzerzhynsk reservoir

Trophic interaction between topmouth gudgeon (Pseudorasbora parva) and the co-occurring species during summer in the Dniprodzerzhynsk reservoir

Reproduction mode of European Bitterling (Rhodeus amarus,Bloch, 1782) determined through rapid oocyte counts and size determination using digital imaging

Thin‐Sectioned Otoliths Reveal Sexual Dimorphism and a 10‐Year Lifespan in the Endangered Pahrump Poolfish

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