Unusual male size vs sperm count relationships in a coastal marine amphipod indicate reproductive impairment by unknown toxicants
Marina Tenório Botelho, Neil Fuller, Monizze Vannuci-Silva, Gongda Yang, Kara Richardson, Alex T. Ford
ARTIGO
Inglês
Agradecimentos: The authors acknowledge São Paulo Research Foundation (FAPESP – grant numbers 2019/14398-2 and 2017/16168-9) for a scholarship to M.T. Botelho. NF and ATF were funded for part of this work through the Natural Environment Research Council (NERC) program TRansfer - Exposure - Effects...
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Agradecimentos: The authors acknowledge São Paulo Research Foundation (FAPESP – grant numbers 2019/14398-2 and 2017/16168-9) for a scholarship to M.T. Botelho. NF and ATF were funded for part of this work through the Natural Environment Research Council (NERC) program TRansfer - Exposure - Effects (TREE): integrating the science needed to underpin radioactivity assessments for humans and wildlife (NERC NE/L000393/1). ATF is currently funded through the EU Interreg REDPOL project - Reduction of Pollution by endocrine disrupting compounds at source. Graphical abstract created with BioRender.com
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Abstract: Sperm quantity/quality are significant reproductive endpoints with clear links to population level dynamics. Amphipods are important model organisms in environmental toxicology. Despite this, field monitoring of male fertility in invertebrates has rarely been used in monitoring programs....
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Abstract: Sperm quantity/quality are significant reproductive endpoints with clear links to population level dynamics. Amphipods are important model organisms in environmental toxicology. Despite this, field monitoring of male fertility in invertebrates has rarely been used in monitoring programs. The aim of this study was to compare sperm quality/quantity in an amphipod collected at six UK locations with differing water quality. Due to low sperm counts and an observed lack of relationship between sperm count and weight in amphipods collected from a nationally protected conservation area (Langstone Harbour, England), we also compared datasets from this site over a decade to determine the temporal significance of this finding. One collection to evaluate a female reproductive endpoint was also performed at this site. Interestingly, this harbour consistently presented some of the lowest sperm counts comparable to highly industrial sites and low eggs number from females. Amphipods collected from all the sites, except from Langstone Harbour, presented strong positive correlations between sperm count and weight. Given Langstone Harbour has several international and national protected statutes primarily for marine life and birds, our results indicate that E. marinus, one important food component for wading birds, might be impacted by unknown reproductive stressors. These unknown stressors maybe related to agricultural runoff, leachate from historical landfills and effluent from storm water overflows. This study highlights the importance of exploring new reproductive endpoints such as sperm quantity/quality in marine monitoring programs
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2017/16168-9; 2019/14398-2
Aberto
Fuller, Neil
Autor
Ford, Alex T.
Autor
Unusual male size vs sperm count relationships in a coastal marine amphipod indicate reproductive impairment by unknown toxicants
Marina Tenório Botelho, Neil Fuller, Monizze Vannuci-Silva, Gongda Yang, Kara Richardson, Alex T. Ford
Unusual male size vs sperm count relationships in a coastal marine amphipod indicate reproductive impairment by unknown toxicants
Marina Tenório Botelho, Neil Fuller, Monizze Vannuci-Silva, Gongda Yang, Kara Richardson, Alex T. Ford
Fontes
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Aquatic toxicology v. 233, n. art. 105793, Apr. 2021 |