Population level effects of reduced fecundity in the fish species perch (Perca fluviatilis) and the implications for environmental monitoring

Hanson, Niklas

doi:10.1016/j.ecolmodel.2009.04.053

Cited by 18 publications

(18 citation statements)

References 28 publications

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“…Data marked with different letters (capital letters for Lake Mosag and small letters for Lake Klebarskie) were statistically different (p < 0.05) Fig. 3 (Jobling et al 1998, van Aerle et al 2001, Noaksson et al 2001, Bernet et al 2004, Hanson 2009. No gonads with a male character were found in our study in either macroscopic observations or in the histological examination.…”

Section: Discussionmentioning

confidence: 57%

“…Nath & Kumar 1990, Crump & Trudeau 2009, Segner 2011 or with sex reversal resulting from hormone therapies (e.g. Kipfer et al 2009 (and intersex) gonad tissues (Jobling et al 1998, van Aerle et al 2001, Noaksson et al 2001, Kavanagh et al 2004, Hanson 2009). Hermaphroditic histological changes in the ovaries have also been reported in northern pike (Dominguez et al 1989, Vine et al 2005.…”

Section: Discussionmentioning

confidence: 99%

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Ovarian alterations in wild northern pike Esox lucius females

et al. 2013

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The aim of the present study was to analyse the occurrence of macroscopically visible ovary alterations in 2 populations of northern pike Esox lucius L. originating from lakes in the Mazurian Lake District (NE Poland). The alterations were characterised by ovary tissue that was morphologically malformed, in part or in whole, and contained immature oocytes, i.e. trophoplastic or previtellogenic oocytes instead of vitellogenic oocytes. These alterations were found only in the ovaries, and no morphological alterations of the testes were noted. Macroscopic and histological analyses were carried out in order to classify the observed alterations in the ovaries. Three types of alterations were identified in which morphological malformations as well as histological investigation of the ovaries were considered. An analysis of the size and age of the fish in relation to the occurrence of alterations as well as of the macroscopic and histological nature of the alteration types was made. The data obtained revealed no lake or age dependency of the observed alterations. Based on the results obtained, we suggest that the presence of endocrine disruptors in the environment or/and genetic factors could be responsible for these kinds of gonad anomalies. However, our results did not allow us to determine the aetiology of the alterations. KEY WORDS: Northern pike · Ovary alterations · Endocrine disruptors · Reproduction · Recruitment successResale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Ovarian alterations in wild northern pike Esox lucius females

et al. 2013

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“…For l>1, the population size will increase exponentially, and for l<1, the population will decline and approach extinction. Age-classified matrix population models are well suited for fish (or other species) that reproduce once per year and have previously been used to evaluate toxic effects on the population level in a number of studies [11,[17][18][19][20]. Using Eq.…”

Section: Populationmentioning

confidence: 99%

Population Modeling of the Fish Species Roach (Rutilus rutilus) to Investigate How Latitudinal Variations in Life History Traits Affect the Sensitivity to Anthropogenic Stress

Hanson

2011

Environ Model Assess

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Anthropogenic stressors, such as pollution and habitat degradation, have affected natural fish populations (and other species) by increased mortality and/or impaired reproduction. Depending on the life history of a population, the sensitivity to a particular stress varies. Demographic population models can be used to evaluate these differences and determine which populations are most sensitive to a specific impact. In the present study, five populations of roach (Rutilus rutilus) with different life histories were modeled and compared for sensitivities to reductions in fecundity or survival. The five populations reflected a north-south gradient with increasing life span, delayed maturity, and reduced fecundity at higher latitudes. Furthermore, three types of population models were used and compared. The population models were an unstructured model, a two-stage model with juveniles and adults and an age-structured model with age-dependent fecundity. The results of the population models showed that populations at higher latitudes are more sensitive to a reduction in survival but less sensitive to a reduction in fecundity. Current methods in ecological risk assessment are based on oversimplifications due to a lack of ecological theory. The use of population models may increase the ecological relevance and help produce better risk assessments. The two-stage model provided results that were similar to the results of the more complex agestructured model in most cases. The unstructured model, however, deviated significantly from the other two models.

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“…, 2006; Nunn et al. , 2007; Hanson, 2009), and wider ecosystem dynamics have been studied using modelling systems such as ECOSIM (Christensen & Walters, 2004). However, the specific role of disease in freshwater aquatic animal population dynamics has received little attention (Longshaw et al.…”

Section: Population Modelsmentioning

confidence: 99%

“…There is a long-established history of fish population modelling in both marine and freshwater ecosystems (Ricker, 1954;Beverton & Holt, 1957;Pelletier & Mahévas, 2005;Chu et al, 2006;Nunn et al, 2007;Hanson, 2009), and wider ecosystem dynamics have been studied using modelling systems such as ECO-SIM (Christensen & Walters, 2004). However, the specific role of disease in freshwater aquatic animal population dynamics has received little attention (Longshaw et al, 2010).…”

Section: Population Modelsmentioning

confidence: 99%

The application of risk and disease modelling to emerging freshwater diseases in wild aquatic animals

et al. 2011

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Summary 1. Emerging diseases pose significant ecological and economic threats in fresh waters. Both risk assessment and mathematical modelling have potential to improve our understanding of the uncertainties associated with emerging disease events and make informed predictions about their likely impact. 2. We review the different methodologies that may be used to estimate the likely geographic spread and potential impact of new and emerging diseases in fresh waters. We also highlight the limitations of the currently available methods and requirements for future development. 3. In the realm of aquatic animal health, risk assessment has been used mainly to examine the risks of disease spread through international trade import risk analysis (IRA). Import risk analysis of newly emerged diseases underpins the development of appropriate risk mitigation measures to minimise further spread. This is best illustrated by assessments of the spread of Gyrodactylus salaris and also illustrates how risk assessment can examine disease interaction between wild and farmed fish. 4. Various approaches have been employed to study disease transmission within freshwater fish populations at a range of spatial scales. There is scope for the application of these techniques to predict the impact of economically and environmentally important emerging freshwater diseases that arise from new pathogens, known diseases spreading to new locations or changes in pathogenicity owing to changing environmental conditions (e.g. because of climate change). 5. Population models are widely used in freshwater fishery management. The integration of disease processes within freshwater aquatic animal population models is required to provide tools to assess the likely impact of newly emerged diseases and allow mitigation measures to be assessed. 6. Compared with their use in other areas of animal health, modelling has been relatively little used for aquatic animal disease studies. The wide range of modelling methods used to study disease in human and terrestrial animals can usefully be applied to inform the development of policies to protect the health of wild stocks from emerging diseases.

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Population level effects of reduced fecundity in the fish species perch (Perca fluviatilis) and the implications for environmental monitoring

Cited by 18 publications

References 28 publications

Ovarian alterations in wild northern pike Esox lucius females

Ovarian alterations in wild northern pike Esox lucius females

Population Modeling of the Fish Species Roach (Rutilus rutilus) to Investigate How Latitudinal Variations in Life History Traits Affect the Sensitivity to Anthropogenic Stress

The application of risk and disease modelling to emerging freshwater diseases in wild aquatic animals

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