Endocrine disruption in a marine amphipod? Field observations of intersexuality and de-masculinisation

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

doi:10.1016/j.marenvres.2004.03.013

Cited by 70 publications

(73 citation statements)

References 6 publications

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“…Studies on the depositfeeding amphipod M. affinis showed that male sexual development and the development of olfactory sensilla on the antennules was delayed or disrupted when the animals were exposed to sediment from a lake presumably receiving endocrine disruptors from a refuse dump [108]. The incidence of intersexuality was found to be significantly increased in the marine/ estuarine amphipod E. marinus from polluted sites in eastern Scotland [109]. Androgenic glands and a putative androgenic gland hormone (AGH) peptide were present in males.…”

Section: Effects Of Endocrine-disrupting Contaminants On Amphipodsmentioning

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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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: Effects Of Endocrine-disrupting Contaminants On Amphipodsmentioning

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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“…An association between intersexuality in Crustacea and anthropogenic disturbance has been reported recently in a number of studies Stevenson, 1991, 1994;Takahashi et al, 2000;Allen et al, 2002;Brian, 2005;EDIT 2003;Ford et al, 2004aFord et al, , 2005. Intersexuality in wildlife has received considerable attention over the past 15 years due to the links between anthropogenic chemicals and reproductive disorders thought to occur via disruption to endocrine systems (Colburn et al, 1996;IEH, 1999).…”

Section: Introductionmentioning

confidence: 77%

“…Intersexuality in wildlife has received considerable attention over the past 15 years due to the links between anthropogenic chemicals and reproductive disorders thought to occur via disruption to endocrine systems (Colburn et al, 1996;IEH, 1999). Recently we reported higher incidences of intersexuality in the marine/estuarine amphipod Echinogammarus marinus from industrially contaminated sites ( 14-15% intersex) in the Firth of Forth, Scotland, when compared with reference sites ( 5-8% intersex; Ford et al, 2004a). However, results from an additional study have indicated feminising microsporidian parasites as the most probable cause of the observed intersex (Ford et al, 2006).…”

Section: Introductionmentioning

confidence: 82%

“…Sub-samples of 300 normal males and females (50 per site from all six sites in Loch Duich), and 34 intersex males and 126 intersex females (pooled from all sites) from Loch Duich were also analysed morphometrically (methods by Ford et al, 2004a), using a dissecting microscope and eyepiece graticule. The measurements taken included weight (mg; normalised by square root transformation), and the lengths of both the left and right sides of gnathopod 1, gnathopod 2, and the eye.…”

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confidence: 99%

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An investigation into intersex amphipods and a possible association with aquaculture

Ford

Read

Jones

et al. 2007

Marine Environmental Research

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“…It is also known that endocrine-disrupting pollutants cause de-masculinization and intersexuality in amphipods, probably by interfering with the function of the AG (Ford et al, 2004). Therefore, it is clear that AG, which is responsible for the control of male primary and secondary sexual characteristics (including behaviour), is also a key factor in the formation of intersex individuals and sexual plasticity in crustaceans.…”

Section: Laboratory Manipulations: Effect Of Eyestalk Ablation and Anmentioning

confidence: 99%

Different aspects of reproduction strategies in crayfish: A review

Yazicioglu

Reynolds

Kozák

2016

Knowl. Manag. Aquat. Ecosyst.

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-Study of the reproductive strategy of crayfish species is of great importance in the current astacological world. Crayfish are among the largest freshwater invertebrates, and as keystone species, they are able to regulate the structure of the benthic fauna in the freshwaters, demonstrating different ecological strategies and life spans ranging up to 20+ years. In order to bring together the various pieces of information related to this issue, this overview of published scientific reports was conducted. The majority of crayfish species studied show sexual dimorphism, with approximately equal numbers of males and females. However, over some decades numerous observations have been made for a few species that may have different modes of reproduction, such as hermaphroditism or intersex (e.g. Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus and Pacifastacus leniusculus) and parthenogenesis (only Procambarus fallax f. virginalis).A recent study showed a new case of parthenogenesis as apomictic parthenogenesis (only Orconectes limosus). In addition, there are many investigations into the reproduction biology of crayfish, including using eyestalk ablation or androgenic gland ablation under various lab conditions and hybridization under natural conditions (e.g. Astacus astacus X Astacus leptodactylus, Orconectes rusticus X Orconectes propinquus). There are also some chemical factors which could possibly affect the reproduction system of crayfish in the wild.Key-words: crustacea / parthenogenesis / intersex / hybridization Résumé -Différents aspects des stratégies de reproduction des écrevisses : une revue. L'étude de la stratégie de reproduction des espèces d'écrevisses est d'une grande importance dans le monde astacicole actuel. Les écrevisses sont parmi les plus grands invertébrés d'eau douce, et comme des espèces clés, elles sont capables de réguler la structure de la faune benthique dans les eaux douces, présentant différentes stratégies écologiques et des durées de vie allant jusqu'à 20 ans. Afin de réunir les différents éléments d'information relatifs à cette question, une revue des publications scientifiques a été conduite. La majorité des espèces d'écrevisses étudiées montrent un dimorphisme sexuel, avec un nombre approximativement égal de mâles et de femelles. Cependant, depuis quelques décennies, de nombreuses observations ont été faites pour quelques espèces qui peuvent avoir différents modes de reproduction, tels que l'hermaphrodisme ou l'intersexe (par exemple Cherax quadricarinatus, Samastacus spinifrons, Parastacus virilastacus et Pacifastacus leniusculus) et la parthénogenèse (seulement Procambarus fallax f. virginalis). Une étude récente a montré un nouveau cas de parthénogenèse, une parthénogenèse apomictique (seulement Orconectes limosus). En outre, il y a beaucoup de recherches sur la biologie de la reproduction de l'écrevisse, y compris celle de l'ablation du pédoncule oculaire ou ablation de la glande androgène dans diverses conditions de laboratoire et de l'hybridati...

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Endocrine disruption in a marine amphipod? Field observations of intersexuality and de-masculinisation

Cited by 70 publications

References 6 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

An investigation into intersex amphipods and a possible association with aquaculture

Different aspects of reproduction strategies in crayfish: A review

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