Attraction of crayfishes <i>Procambarus clarkii, Orconectes rusticus</i> and <i>Cambarus bartoni</i> to a feeding stimulant and its suppression by a blend of metals

The objective was to investigate whether sediment-living amphipods, i.e., Monoporeia ( ) ( affinis, were affected by endocrine disrupters in the same way as perch Perca fluviatilis and pike Esox ) lucius were observed to be affected in an earlier study. Surface sediments were collected at a reference ( ) site in Lake Malaren Station 1 , in a remote lake contaminated with an unidentified leakage water from ä ( ) refuse dump Station 2 . The latter was compared to a sediment contaminated with heavy metals and ( ) PHOCs polycyclic aromatic hydrocarbons and polychlorobiphenyls from a sampling site located in the ( ) urban area of the city of Stockholm Station 3 . Amphipods were exposed to the contaminated sediments in soft-bottom microcosms in the laboratory during the periods for sexual maturation, mating, and embryogenesis. Three samplings were included; one at the start of the experiment, another after ( ) one month to examine effects on gonad maturation , and a third after 3 months to investigate effects on fertilization success and embryogenesis. No effects were observed on organisms exposed to sediments from Station 1 and Station 3, while effects on sexual maturation on females and males of M. affinis were detected in sediment from Station 2. Females were more seriously affected. Nearly 50% of the females showed a delayed sexual development and 28% of these were immature, showing that the sexual maturation was interrupted due to contaminants in the sediment. In addition to the interrupted sexual maturation, other reproduction variables such as fertilization success and fecundity, were insignificantly ( ) p = 0.383 lower in Station 2 sediment and thus enforce the possibility of endocrine effect. Similar effects were observed on males in terms of a delayed sexual maturation and a lower number of secondary sexual characteristics, i.e., antennule segments, and chemical sensory organs, i.e., aes-( ) thetascs. Since effects were recorded on processes before mating we suggest that the contaminant s in the leakage water act as an endocrine disrupter by inhibiting the release of neural hormones controlling the normal sexual maturation in both female and male amphipods. ᮊ 2000 by John Wiley & Sons, Inc. Environ Toxicol 15: 518᎐526, 2000

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“…Sutterlin, 1974 . A few recent works have been re-Ž ported on this issue Steele et al, 1992;Dodson et al, . 1995 .…”

Section: Discussionmentioning

confidence: 99%

Effects on the sexual maturation of the sediment-living amphipodMonoporeia affinis

2000

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Predicting the effects of copper on local population decline of 2 marine organisms, cobia fish and whiteleg shrimp, based on avoidance response

Araújo

Cedeño-Macías

Vera-Vera

et al. 2016

Enviro Toxic and Chemistry

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The present study focuses on avoidance response to predict population decline of the marine fish Rachycentron canadum (cobia) and larvae of the estuarine shrimp Litopenaeus vannamei (whiteleg shrimp). Avoidance of approximately 60% was recorded for the cobia fry exposed to 1.0 mg Cu/L, 1.60 mg Cu/L, and 1.80 mg Cu/L. For the shrimp larvae, avoidance was approximately 80% for all Cu concentrations. The population decline of cobia fry was conditioned by avoidance in lower concentrations. However, in higher concentrations mortality begins to play an important role. The displacement toward uncontaminated habitats might determine shrimp population decline. A Cu-contaminated environment can determine the habitat selection of both species and, therefore, their local population decline.

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Chronic effects of metal releases from historical mining on threatened crayfish in Madison County Missouri, USA

Allert,

Cleveland,

DiStefano

et al. 2024

Ecotoxicology

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Attraction of crayfishes Procambarus clarkii, Orconectes rusticus and Cambarus bartoni to a feeding stimulant and its suppression by a blend of metals

Cited by 15 publications

References 20 publications

Effects on the sexual maturation of the sediment-living amphipodMonoporeia affinis

Effects on the sexual maturation of the sediment-living amphipodMonoporeia affinis

Predicting the effects of copper on local population decline of 2 marine organisms, cobia fish and whiteleg shrimp, based on avoidance response

Chronic effects of metal releases from historical mining on threatened crayfish in Madison County Missouri, USA

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