From individuals to populations: Impacts of environmental pollution on natural eelpout populations

Bergek, Sara; Ma, Qisheng; Vetemaa, Markus; Franzén, Fredrik; Appelberg, Magnus

doi:10.1016/j.ecoenv.2012.01.019

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…The Leslie matrix model ( Leslie, 1945 ) is a deterministic model widely used to assess the age structure of populations (e.g., Iwasaki et al., 2010 ; Bergek et al., 2012 and the references therein; Monte, 2018 and the references therein; Sun et al., 2021 ). Briefly, this model classifies individuals in a population into age classes.…”

Section: Introductionmentioning

confidence: 99%

A novel approach for accurate quantification of lake residence time — Lake Kinneret as a case study

2022

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Section: Introductionmentioning

confidence: 99%

A novel approach for accurate quantification of lake residence time — Lake Kinneret as a case study

2022

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“…While skipped spawning refers to ephemeral intermittent events, reproductive abnormalities that lead to permanent reproductive failure in fish can be caused by bioaccumulation of toxic substances or exposure to environmental contaminants (Jones and Reynolds, 1997;Lawrence and Hemingway, 2003). Such changes may lead to permanent pathological changes in both female and male fish and result in severe implications on natural populations, including population losses (Bergek et al, 2012). In addition, reproductive disorders may be caused by thermal pollution-effluents of cooling water from nuclear power plants at high temperature (Luksiene and Sandstro ¨m, 1994).…”

Section: Introductionmentioning

confidence: 99%

Female ovarian abnormalities and reproductive failure of autumn-spawning herring (Clupea harengus membras) in the Baltic Sea

Ojaveer

Tomkiewicz

Arula

et al. 2015

ICES Journal of Marine Science

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Fecundity and reproductive potential are important factors to be considered in evaluating trajectories and demographic predictions of fish populations. Therefore, characterizing the nature and quantifying the extent of any reproductive failure should be considered in fisheries studies. Here, we describe morphological changes in developed ovaries of autumn-spawning herring (Clupea harengus membras) caught in the northern Baltic Sea and evaluate the magnitude of this phenomenon during 3 consecutive years. Visibly, abnormal ovaries were histologically characterized by irregular-shaped oocytes in a vitellogenic or final maturation stage with coagulative necrosis and liquefaction of the yolk sphere, degraded follicle membranes, and fibrinous adhesion among oocytes. Such degeneration is presumed to cause complete infertility in the fish. The frequency of fish with abnormal ovaries varied annually between 10 and 15% among all females sampled. However, specific sampling events showed up to 90% females with abnormal gonads. The specific cause of this abnormality remains unknown; however, prevalence was associated with unfavourable environmental conditions encountered before spawning. Thus, ovarian abnormality was positively related to water temperatures, with the highest level found at ≥15°C and negatively related to the frequency of strong winds. The frequency of occurrence of abnormal gonads decreased with the progression of spawning from August to October. The observed abnormality and associated spawning failure will negatively affect the realized fecundity of autumn herring in the Baltic Sea and may act as a limiting factor for recovery of the stock, which has experienced profound depression during the last three decades.

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Quantifying the consequence of applying conservative assumptions in the assessment of oil spill effects on polar cod (Boreogadus saida) populations

et al. 2021

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In order to assess the potential impact from oil spills and decide the optimal response actions, prediction of population level effects of key resources is crucial. These assessments are usually based on acute toxicity data combined with precautionary assumptions because chronic data are often lacking. To better understand the consequences of applying precautionary approaches, two approaches for assessing population level effects on the Arctic keystone species polar cod (Boreogadus saida) were compared: a precautionary approach, where all exposed individuals die when exposed above a defined threshold concentration, and a refined (full-dose-response) approach. A matrix model was used to assess the population recovery duration of scenarios with various but constant exposure concentrations, durations and temperatures. The difference between the two approaches was largest for exposures with relatively low concentrations and short durations. Here, the recovery duration for the refined approach was less than eight times that found for the precautionary approach. Quantifying these differences helps to understand the consequences of precautionary assumptions applied to environmental risk assessment used in oil spill response decision making and it can feed into the discussion about the need for more chronic toxicity testing. An elasticity analysis of our model identified embryo and larval survival as crucial processes in the life cycle of polar cod and the impact assessment of oil spills on its population.

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From individuals to populations: Impacts of environmental pollution on natural eelpout populations

Cited by 11 publications

References 33 publications

A novel approach for accurate quantification of lake residence time — Lake Kinneret as a case study

A novel approach for accurate quantification of lake residence time — Lake Kinneret as a case study

Female ovarian abnormalities and reproductive failure of autumn-spawning herring (Clupea harengus membras) in the Baltic Sea

Quantifying the consequence of applying conservative assumptions in the assessment of oil spill effects on polar cod (Boreogadus saida) populations

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