Seasonal dynamics in population characteristics of European bitterling Rhodeus amarus in a small lowland river

Konečná, Markéta; Reichard, Martin

doi:10.1111/j.1095-8649.2010.02854.x

Cited by 20 publications

(20 citation statements)

References 35 publications

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“…Fish were fed daily with commercial flake fish food. The temperature in the tanks was recorded automatically every 10 min and was 23.3 ± 0.7°C during the experiment; this agrees with the ambient temperature recorded in the source population during glochidia release (Konečná and Reichard 2011).…”

Section: Experimental Test Of Host Specificitymentioning

confidence: 97%

The role of host specificity in explaining the invasion success of the freshwater mussel Anodonta woodiana in Europe

et al. 2011

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Several freshwater mussel species represent some of the most problematic invasive species and have considerably altered ecosystems worldwide. Their invasion potential has been partially attributed to their free-living larvae, which have a high dispersal capability. We investigated the invasion potential of Anodonta (Sinanodonta) woodiana, a species of East Asian unionid mussel established worldwide despite having an obligatory parasitic stage (glochidium), which must encyst on host fish. The invasion success of A. woodiana has been attributed to the success of worldwide introductions of its sympatric fish hosts. We experimentally found, however, that A. woodiana is a broad host generalist, which can complete its development on all eight fish species tested, both coinvasive and native. Subsequently, we used a data on the occurrence and relative abundance of potential hosts in river habitats in the Czech Republic to project scenarios of the effect of host availability on A. woodiana invasion. We found that host availability does not constitute a major limit for A. woodiana to colonise most aquatic habitats in Central Europe. In addition, we investigated seasonal dynamics of A. woodiana reproduction and did not detect any limitations of its reproduction by ambient water temperatures typical of a Central European lowland river. Consequently, we predict that A. woodiana may further increase the speed and range of its invasion and we discuss possible consequences to native habitats and communities, especially to the endangered species of unionid mussels.

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Section: Experimental Test Of Host Specificitymentioning

confidence: 97%

The role of host specificity in explaining the invasion success of the freshwater mussel Anodonta woodiana in Europe

et al. 2011

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“…The within-year changes in environmental conditions induce considerable seasonal fluctuations in the lipid (L) content of fish bodies (Brown & Murphy, 2004;Jonas, Kraft, & Margenau, 1996;Konečná & Reichard, 2011). For instance, in temperate climate, the food limitation during winter reduces L reserves (Copeland, Murphy, & Ney, 2010;Hurst & Conover, 2003;Shuter, Finstad, Helland, Zweimüller, & Hölker, 2012), while the increase in available food resource and the high L (i.e.…”

Section: Introductionmentioning

confidence: 99%

Organismal stoichiometry at the temporal scale: Seasonal variability shapes interspecific differences in fish

et al. 2018

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Changes in organismal stoichiometry (OS) may be driven by seasonal changes in lipid reserves (i.e. energy) and gonadal development in fish. However, these relationships are understudied. Hence, we investigated how seasonal changes in body lipid content and gonadal development can drive the seasonal variability of OS traits at the example of three coexisting freshwater fish species. Furthermore, we aimed to assess the importance of seasonal OS alteration in comparison with interspecific differences. Carbon (%C), nitrogen (%N) and phosphorus (%P) contents, and the molar ratios of these elements (C:N, C:P and N:P) were examined in rudd (Scardinius erythrophthalmus), pumpkinseed (Lepomis gibbosus) and Amur sleeper (Perccottus glenii). We consider the sex and seasonal changes in body size as a potential factor in shaping OS. Substantial seasonal intraspecific variability occurred in all OS traits. Its extent exceeded interspecific differences in %C, %N and C:N, while %P and C:P, N:P were determined primarily by species identity. The effect of sex occurred sporadically and was considerable in some cases. Seasonal changes in total length did not contribute to intraspecific variability of OS. Intra‐annual changes in body lipid content affected seasonal variability of OS traits substantially, but the strength of this effect was species‐specific. The regulatory role of lipid reserve alterations worked only for those species that exhibited considerable seasonal variation in body fat content. Gonado‐somatic index proved to be marginal in shaping seasonal changes in OS, presumably because a substantial portion of the essential elemental demand for gonadal growth is supplied by rearrangements within the body, without notable changes in the entire elemental composition. In the light of our findings, we suggest that more attention should be given to the influence of seasonal variability in OS traits, and sex should be considered as a taxon‐dependent effect. Ignoring this substantial degree of variability might lead to inaccuracies in assessing the extent of both intra‐ and interspecific OS differences. We conclude that seasonal OS variability might shape consumer‐driven nutrient dynamics.

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“…In the mating system of the longnose filefish, Oxymonacanthus longirostris, an unbiased adult sex ratio at the beginning of the breeding season became slightly female-biased toward the end due to a decline in the number of males (Kokita & Nakazono, 1998). This decline in male abundance is most likely due to higher male mortality during the breeding season (Konečná & Reichard, 2011), possibly caused by exhaustion resulting from parental care or male-male competition, a higher susceptibility to parasites and diseases due to the immunosuppressive effect of testosterone (Folstad & Karter, 1992), or increased predation risk (Marconato et al, 1993;Macías Garcia et al, 1998;Lindström, 2001). One study suggests that sex ratio during the breeding season may be naturally female-biased in wild rosy bitterling populations (Zhang, 2005), though the causes of this bias are not yet known.…”

Section: Sex Ratio Dynamicsmentioning

confidence: 99%

“…In European bitterling, Rhodeus amarus, female bias in the population sex ratio is common during the latter part of the reproductive season due to increased male mortality (Konečná & Reichard, 2011) and it is likely that a similar effect may also be expressed in some rosy bitterling populations. Importantly, while the population-level OSR of European bitterling is typically strongly male-biased , local conditions (e.g., low mussel availability, high variation in mussel or male quality) can result in the local OSR being female-biased (Reichard et al, , 2008.…”

Section: Field Collectionmentioning

confidence: 99%

“…All our experiments were carried out by the same person (C.L.) from June to September 2009, i.e., at the time when a female-biased OSR was most likely to occur in the wild due to increased male mortality over the reproductive season (Konečná & Reichard, 2011). Before the start of experiments, a mussel was placed in a sand-filled plastic cup at the centre of the experimental tank and covered with an upturned perforated plastic cup to prevent females from spawning in them, though all bitterling were able to see and smell the mussel, thereby eliciting the full repertoire of reproductive behaviours (Spence et al, 2013).…”

Section: Observations Of Reproductive Behavioursmentioning

confidence: 99%

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Reproductive behaviour of female rosy bitterling Rhodeus ocellatus in response to a female-biased operational sex ratio

Liao

Chen

et al. 2014

Behav

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While the effect of Operational Sex Ratio (OSR) on reproductive behaviour of males has been studied extensively, little is known of the response of females facing a female-biased OSR. We investigated the effect of different OSRs on female reproductive behaviour using the rosy bitterling, Rhodeus ocellatus, a freshwater fish that lays its eggs inside the gills of living freshwater mussels. Three levels of OSR (male/female ratio 1:1, 1:3 and 1:5) were tested. We demonstrated that inspection of the mussel (spawning substrate) by individual females increased with increasingly female-biased OSR, but that the rate of following territorial male decreased. Aggression towards other females was not affected by the OSR. Interestingly, when a male bitterling led a non-dominant female towards the mussel, the dominant female would become aggressive to the male and chase the non-dominant female away. Aggression towards male followed a bell-shaped pattern and was highest at an OSR of 1:3. In both the female-biased OSRs examined, almost 50% of dominant females tended to chase away other females and defend the mussel, showing territoriality in a similar manner to males. These observations suggest that female reproductive behaviour is strongly affected by the OSR, and their reproductive tactics during courtship change from a passive role in courtship (following a male) to an active role in courtship (approaching a male), with presence of female territorial behaviour as the OSR becomes increasingly female-biased. This study provides strong evidence that a female-biased OSR has an important effect on female reproductive behaviour.Keywords alternative reproductive behaviour, female aggression, operational sex ratio, bitterling.

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Seasonal dynamics in population characteristics of European bitterling Rhodeus amarus in a small lowland river

Cited by 20 publications

References 35 publications

The role of host specificity in explaining the invasion success of the freshwater mussel Anodonta woodiana in Europe

The role of host specificity in explaining the invasion success of the freshwater mussel Anodonta woodiana in Europe

Organismal stoichiometry at the temporal scale: Seasonal variability shapes interspecific differences in fish

Reproductive behaviour of female rosy bitterling Rhodeus ocellatus in response to a female-biased operational sex ratio

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