Effects of Polycyclic Aromatic Hydrocarbons on Sexual Maturity of Atlantic Cod, Gadus morhua, following Chronic Exposure

Khan, R. A.

doi:10.5539/ep.v2n1p1

Cited by 9 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our data bolster the growing body of evidence that hydrocarbon exposure can alter egg production in female fish (Brown‐Peterson et al ; Perrichon et al ; Raimondo et al ) and decrease reproductive fitness in male fish by reducing fertilization rate (Booc et al ). Hydrocarbons have also been shown to reduce sperm quantity (Sundt and Bjorkblom ) and quality (Nagler and Cyr ) and delay spermiation (Khan ), though those endpoints were not assessed in the present study. Correlation analyses revealed that tissue concentrations of parent and alkyl PAHs were negatively correlated with both egg production and fertilization rate, providing additional supportive evidence that the changes observed in egg production and fertilization rate in the present study are a result of hydrocarbon exposure and not natural variation between tanks.…”

Section: Discussionmentioning

confidence: 89%

Transgenerational effects of polycyclic aromatic hydrocarbon exposure on sheepshead minnows (Cyprinodon variegatus)

Jasperse

Levin

Rogers

et al. 2019

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

The Deepwater Horizon oil spill resulted in the release of over 640 million L of crude oil into the Gulf of Mexico, affecting over 2000 km of shoreline, including estuaries that serve as important habitats and nurseries for aquatic species. Cyprinodon variegatus (sheepshead minnow) are small‐bodied fish that inhabit northern Gulf of Mexico estuaries, are easily adaptable to laboratory conditions, and are commonly used in toxicological assessment studies. The purpose of the present study was to determine the somatic, reproductive, and developmental effects of an environmentally relevant polycyclic aromatic hydrocarbon (PAH) mixture, the oil high‐energy water accommodated fraction (HEWAF), on experimentally exposed sheepshead minnow (F0) as well as 2 generations of offspring (F1 and F2) without additional exposure. The F0 generation exposed to HEWAF had increased liver somatic indices, altered egg production, and decreased fertilization. Several developmental endpoints in the F1 were altered by F0 HEWAF exposure. As adults, low HEWAF‐exposed F1 females demonstrated decreased weight and length. Both the F1 and F2 generations derived from high HEWAF‐exposed F0 had deficits in prey capture compared to control F1 and F2, respectively. Correlations between endpoints and tissue PAHs provide evidence that the physiological effects observed were associated with hydrocarbon exposure. These data demonstrate that PAHs were capable of causing physiological changes in exposed adult sheepshead minnow and transgenerational effects in unexposed offspring, both of which could have population‐level consequences. Environ Toxicol Chem 2019;38:638–649. © 2018 SETAC

show abstract

Section: Discussionmentioning

confidence: 89%

Transgenerational effects of polycyclic aromatic hydrocarbon exposure on sheepshead minnows (Cyprinodon variegatus)

Jasperse

Levin

Rogers

et al. 2019

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…We have previously demonstrated that exposure to crude oil highenergy water accommodated fraction (HEWAF; an environmentally relevant PAH mixture), results in reduced egg production by SHM and developmental effects in two generations of offspring (Jasperse et al, 2019). Many other studies have also reported reproductive impairment in fish exposed to PAHs, including reduced egg production (Brown-Peterson et al, 2013;Raimondo et al, 2016;Vignet et al, 2016), reduced serum estradiol levels (Pollino et al, 2009) delayed spawning and spermiation (Khan, 2012), and altered testicular development (Sundt and Bjorkblom, 2011). However, it remains unknown how adverse environmental conditions common to estuarine environments affect the sensitivity of SHM to the reproductive effects of HEWAF.…”

Section: Introductionmentioning

confidence: 99%

Hypoxia and reduced salinity exacerbate the effects of oil exposure on sheepshead minnow (Cyprinodon variegatus) reproduction

et al. 2019

View full text Add to dashboard Cite

Estuaries of the northern Gulf of Mexico are dynamic environments, with fluctuations in salinity and dissolved oxygen, including areas of seasonal hypoxia. Fish that reside and reproduce in these estuaries, including sheepshead minnow (Cyprinodon variegatus; SHM), were at significant risk of oil exposure following the Deepwater Horizon oil spill. It is poorly understood how differences in environmental conditions during oil exposure impact its toxicity. The present study investigated the effects of crude oil high-energy water accommodated fraction (HEWAF) on SHM reproduction in three environmental scenarios (normoxic, hypoxic, and hypoxic with low salinity) to determine if differences in salinity (brackish vs low salinity) and dissolved oxygen (normoxia vs hypoxia) could exacerbate the effects of HEWAF-derived polycyclic aromatic hydrocarbons (PAHs). We observed that HEWAF exposure significantly increased liver somatic index of SHM compared to control, but this effect was not exacerbated by hypoxia or low salinity. HEWAF exposure also significantly decreased egg production and egg fertilization rate, but only in the hypoxic and hypoxic with low salinity scenarios. A significant correlation existed between body burdens of PAHs and reproductive endpoints, providing substantial evidence that oil exposure reduced reproductive capacity in SHM, across a range of environmental conditions. These data suggest that oil spill risk assessments that fail to consider other environmental stressors (i.e. hypoxia and salinity) may be underestimating risk.Mississippi, Alabama, and Florida were all impacted by oil slicks that washed ashore (Nixon et al., 2016). In late April 2010, in an effort to limit the effects of oil on coastal habitats, the state of Louisiana initiated a massive diversion of freshwater from the Mississippi River into Barataria Bay and Breton Sound (Bianchi et al., 2011;Martínez et al., 2012). These freshwater diversions significantly reduced salinities in the estuaries of the northern GOM (Bianchi et al., 2011;Powers et al., 2017), but it is still undetermined if this effort was effective in reducing oiling to the Louisiana coast (Martínez et al., 2012).Estuaries of the northern GOM are dynamic environments, with constant fluctuations in salinity and dissolved oxygen. Freshwater inflow from the Mississippi River causes a saline gradient in the estuaries that contributes to water stratification, usually during summer months (USEPA, 1999). The combination of water stratification, excess

show abstract

“…The observed effects in fish include reduced levels of reproductive hormones (estrogens and androgens), inhibited gonadal growth, appearance of a female egg protein (vitellogenin; VTG) in male fish blood; gonadal histopathology and even intersex fish containing testis-ova or ovotestes resulted in decline in fish populations which has been observed in many parts of the world (Jobling et al, 2002, Keiter et al, 2006and Khan, 2013.…”

Section: Introductionmentioning

confidence: 99%

Histological Assessment of Gonadal Alteration in Wild Nile Tilapia Oreochromis niloticus Inhabiting Lake Manzala, Egypt

Amer¹,

Ahmed²

2019

Egypt. J. of Aquatic Biolo. and Fish.

View full text Add to dashboard Cite

The aim of the study was to detect the detrimental effects of water pollutants on gonads structure of wild tilapia, O. niloticus. A total of 209 wild fish were collected from Lake Manzala during the spawning season, summer of 2018. According to the sex ratio and the body weigh fish were divided into four male and three female groups. Anatomical measurements and histological examination were performed for all specimens. Data reveled that sex ratio of collected fish was 74.64 and 25.36 for male and female, respectively. Body length for males was ranged from 11.6 to 19.5 cm and from 13.6 to 18.58 cm for females. Body weight was ranged from 30.05 to 139.73 g and from 39.60 to 125.13 g for male and female, respectively. Microscopic inspection illustrated that fish gonads both testes and ovaries were affected as indicated by the deterioration and degeneration of seminiferous tubules and germinal epithelium as well as the existent of testis-ova and testis fibrosis, and in female by increasing the percentage of atretic follicles and reabsorption of vitellogenic oocytes. The data reflected the prominent changes in male and female gonadal structure, which could be attributed to the accumulation of pollutants and prolonged period of exposure. This may affect the future spawning seasons; the rate of sex cycles or reproductive failure eventually. Such changes can damage the economic revenue of Lake Manzala. Thus, it is recommended to increase water circulation through inlet purgation to attenuate pollutants and restocking the lake.Amer M. A. and Ahmed, K. M. 186

show abstract

Effects of Polycyclic Aromatic Hydrocarbons on Sexual Maturity of Atlantic Cod, Gadus morhua, following Chronic Exposure

Cited by 9 publications

References 33 publications

Transgenerational effects of polycyclic aromatic hydrocarbon exposure on sheepshead minnows (Cyprinodon variegatus)

Transgenerational effects of polycyclic aromatic hydrocarbon exposure on sheepshead minnows (Cyprinodon variegatus)

Hypoxia and reduced salinity exacerbate the effects of oil exposure on sheepshead minnow (Cyprinodon variegatus) reproduction

Histological Assessment of Gonadal Alteration in Wild Nile Tilapia Oreochromis niloticus Inhabiting Lake Manzala, Egypt

Contact Info

Product

Resources

About