Measuring sublethal impacts of pollution on reproductive output of marine Crustacea

Ford, Alex T.; Fernandes, Teresa; Rider, Sebastien A.; Read, Paul A.; Robinson, Craig D.; Davies, Ian

doi:10.3354/meps265303

Cited by 31 publications

(27 citation statements)

References 28 publications

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“…This approach has allowed observation of reproductive disturbances of the amphipod M. affinis in the Baltic Sea and has been adopted by the International Council for the Exploration of the Sea as a recommended technique for biological effect monitoring. Despite a number of reports describing reduced fecundity in amphipods inhabiting polluted environments [14,[23][24][25], most studies have not reported on the mechanisms by which contaminants cause the aberrant reproduction. The present review evaluates the literature on the reproductive biology of amphipods and its endocrine regulation, with the aim of identifying physiological or biochemical pathways in amphipods vulnerable to xenobiotics.…”

Section: Introductionmentioning

confidence: 99%

“…Acute toxicity tests, typically 10 d or less, are more useful for identifying highly contaminated sediments through mortality. Species survival depends ultimately on the reproductive success and quality of offspring; thus, reproductive variables are sometimes considered more predictive indicators of toxicological effects at population and community levels that may be occurring at more slightly impacted sites in the field [14]. Sublethal endpoints in laboratory-based sediment toxicity tests using amphipods have been found to be more sensitive to low concentrations of contaminants approaching the sediment quality guideline trigger values [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Hyne¹

2011

Enviro Toxic and Chemistry

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Abstract-The reproductive biology of amphipods is reviewed to update the knowledge of the male and female reproductive processes of oogenesis and spermatogenesis as well as the endocrine systems of amphipods with the aim of advancing studies of reproductive toxicology. The ovarian and reproduction cycles of female gammaridean amphipods are closely correlated with the molt cycle, which is under direct control by the steroid hormone 20-hydroxyecdysone. The ability of males to copulate and subsequently for females to ovulate is restricted to the early postmolt period of the females. New developments in our understanding of the molt cycle and the endocrine regulatory pathways for reproduction using genomics techniques on other crustacean species are also discussed. The arthropod sterol ponasterone A or xenobiotics such as the fungicide fenarimol have been shown to elicit endocrine disruption in some crustaceans by acting as an agonist for 20-hydroxyecdysone at the ecdysone receptor or by inhibiting the synthesis of 20-hydroxyecdysone, respectively, resulting in disruption of molting and reproduction. Recent studies suggest that cadmium can inhibit secondary vitellogenesis in amphipods. Experimental approaches for examining the metabolic pathways associated with ecdysteroid hormonal signaling or metabolism, exoskeleton maintenance and molting, and the regulation of vitellogenin in amphipods are discussed. This information should aid in the identification of useful biomarkers for reproductive toxicity. Environ. Toxicol. Chem.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Hyne¹

2011

Enviro Toxic and Chemistry

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“…These abnormal specimens provide a unique opportunity to study varying types of 3 endocrine dysfunction and develop endocrine specific biomarkers at several levels of biological organisation. Ford et al (2004a) observed higher proportions of intersex E. marinus at sites associated with pollution when compared to reference sites. These intersexes have subsequently been reported to be caused by feminising microsporidian parasites possibly enhanced through polluted conditions (Ford et al, 2006).…”

Section: Introductionmentioning

confidence: 63%

“…Intersex specimens can be observed displaying both genital papillae and brood plates. Intersexuality in the amphipod E. marinus exists as two phenotypes, namely, intersex male and intersex female (for descriptions see Ford et al, 2004a). These abnormal specimens provide a unique opportunity to study varying types of 3 endocrine dysfunction and develop endocrine specific biomarkers at several levels of biological organisation.…”

Section: Introductionmentioning

confidence: 99%

Intersexuality in crustaceans: Genetic, individual and population level effects

Ford

Sambles

Kille

2008

Marine Environmental Research

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“…Several studies have reported impacts of contaminants on reproductive success in amphipod populations, including embryo aberrations (Sundelin & Eriksson 1998, Camus & Olsen 2008, Sundelin et al 2008b, Pastorinho et al 2009) and reduced fertility resulting from the occurrence of intersex (Ford et al 2003a,b, Ford & Fernandes 2005. Amphipods are model organisms for reproductive studies.…”

Section: Introductionmentioning

confidence: 99%

Local anthropogenic contamination affects the fecundity and reproductive success of an Arctic amphipod

Bach

Fischer

Strand

2010

Mar. Ecol. Prog. Ser.

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This study investigates whether adaptation to life in contaminated Arctic areas carries a cost for the populations in terms of reduced fecundity and reproductive success. The benthic amphipod, Orchomenella pinguis occurs in huge densities in both clean and contaminated sites. O. pinguis was collected at contaminated sites in an open fjord adjacent to Sisimiut, West Greenland, and at clean sites outside the fjord exposed to open waters. The broods of gravid females were analyzed for number of embryos, embryonic developmental stage and number of embryo abnormalities. Further, a sample from 3 of the sites was sexed and analyzed for intersex occurrence. The individuals collected at the most contaminated site had significantly higher fecundity (i.e. reproductive potential), but also higher frequency of embryo aberrations resulting in lower fertility (i.e. actual reproductive success) compared to clean site individuals. These results indicated a cost of living in highly contaminated environments in terms of reduced reproductive success. This study confirms the potential of the benthic amphipod O. pinguis as a bioindicator for assessments of reproductive effects of contaminants in the Arctic marine environment. KEY WORDS: Orchomenella pinguis · Embryo development · Embryo aberrations · GreenlandResale or republication not permitted without written consent of the publisher

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Measuring sublethal impacts of pollution on reproductive output of marine Crustacea

Cited by 31 publications

References 28 publications

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Review of the reproductive biology of amphipods and their endocrine regulation: Identification of mechanistic pathways for reproductive toxicants

Intersexuality in crustaceans: Genetic, individual and population level effects

Local anthropogenic contamination affects the fecundity and reproductive success of an Arctic amphipod

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