Survival and precopulatory behaviour of Gammarus pulex (L.) exposed to two xenoestrogens

Watts, Matthew M.; Pascoe, David D.; Carroll, Kathleen A.

doi:10.1016/s0043-1354(00)00537-6

Cited by 56 publications

(44 citation statements)

References 18 publications

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“…Based on the lack of statistically significant differences between the solvent control and the concentration of 50 ng·L -1 , it can be assumed that ethanol also affect the behaviour to a small extent. Watts et al [9] conducted a similar research on Gammarus pulex. They checked the Indirect Separation Time (IST50) and the Re-pairing Time (RT50) under EE2.…”

Section: Discussionmentioning

confidence: 99%

“…Changes in the behaviour may indicate a change in the environmental conditions [26]. The effect of contamination on the animal behaviour can be reflected in the impact on the locomotion [27], feeding, ventilation [28] and reproductive activity like precopula mating and separation [9]. The precopulatory behaviours have a considerable ecological significance because they are crucial for the mating success [29].…”

Section: Discussionmentioning

confidence: 99%

“…In terms of the reproductive behaviour, so far, the time required for the separation of organisms under the influence of a stress factor has been researched [9]. This study was an attempt to verify the response of the precopula Gammarus tigrinus during the exposure to EE2.…”

Section: Discussionmentioning

confidence: 99%

“…EE2 can affect different groups of organisms, amphipods, chironomids, cladocerans and copepods [8]. It was found that EE2 can induce changes in the reproductive behaviour, the population size and the sex ratio in amphipod Gammarus pulex [9,10]. It also disturbs maturation of the germ cell and spermatogenesis, impairs the development, induces the hermaphroditism and changes in the length of antennae 1 and 2, and gnathopod 2 in Hyalella azteca, EE2 may cause mouthpart deformities and accelerated development of chironomid Chironomus riparius [11,12].…”

mentioning

confidence: 99%

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Effect of 17α-Ethinylestradiol on the Time Needed for Males and Females of Gammarus tigrinus Sexton, 1939 to Re-couple

Wiśniewska¹,

Szaniawska²

2015

JESE-B

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Abstract:The aim of presented study was to determine the behavioural response of precopulatory pairs of Gammarus tigrinus exposed to the 17α-ethinylestradiol (EE2). It was hypothesized that 17α-ethinylestradiol would increase the time needed for a male to re-capture a female. Hypothesis was tested in a laboratory with 20 precopula pairs exposed to different treatment conditions. Paired animals were exposed to two different compound concentrations of 50 ng·L -1 and 500 ng·L -1. The control and solvent control was artificial sea water and artificial sea water with ethanol (the diluent for EE2). The couples were tested several times under different experimental treatments. The obtained results indicate that EE2 affects the precopulatory mate guarding behaviour of Gammarus tigrinus. EE2 in concentration of 50 ng·L -1 and 500 ng·L -1 prolonged the time needed for re-pairing. However, relative to the controls only EE2 in concentration of 500 ng·L -1 significantly prolonged the time needed for male-female re-coupling. In summary, EE2affects the reproductive behaviour of Gammarus tigrinus.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of 17α-Ethinylestradiol on the Time Needed for Males and Females of Gammarus tigrinus Sexton, 1939 to Re-couple

Wiśniewska¹,

Szaniawska²

2015

JESE-B

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“…In this group different behavioral endpoints have been studied, such as alterations in swimming activity, ventilation, foraging and predator avoidance, pollution avoidance, and reproductive behavior (Watts et al 2001;Wallace and Estephan 2004;Riddell et al 2005;De Lange et al 2006a, b;Gerhardt 2007b). Although most of them have shown higher sensitivity to different toxicants than traditional acute bioassays, behavioral endpoints are not used for regulatory uses or for a probabilistic risk assessment of toxicants, as they are considered less standardized than traditional bioassays (with mortality, growth, and reproduction as endpoints) (Scott and Sloman 2004).…”

mentioning

confidence: 99%

Long-Term Effects of Ammonia on the Behavioral Activity of the Aquatic Snail Potamopyrgus antipodarum (Hydrobiidae, Mollusca)

Alonso

Camargo

2008

Arch Environ Contam Toxicol

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An appropriate approach to assess the effect of toxicants on aquatic animals is to monitor behavioral endpoints, as they are a link between physiological and ecological processes. A group that can be exposed longterm to low toxic concentrations is benthic macroinvertebrates, as their mobility in aquatic ecosystems is relatively limited. Therefore, the study of behavioral long-term effects in this group is suitable from an ecological point of view, as behavioral effects can appear before mortality. During the last decades there has been an increase in ammonia concentrations in freshwater ecosystems, threatening aquatic animals. The present study focuses on the long-term effects (40 days) of nonionized ammonia on the behavioral activity of the aquatic snail Potamopyrgus antipodarum. One control and three ammonia concentrations (0.02, 0.07, and 0.13 mg N-NH 3 /L) were used in triplicate, and the activity of snails (as mean time to start normal movement) and immobility were recorded for each treatment after 0, 10, 20, 30, and 40 days of continuous exposure to nonionized ammonia. The results show that P. antipodarum presented a high tolerance to lethal long-term effects of nonionized ammonia, as no animal died during the bioassay. However, the behavioral activity of snails was a very sensitivity endpoint, as a mean nonionized ammonia concentration of 0.07 mg N-NH 3 /L affected P.antipodarum. The results are discussed and compared with the available literature on long-term effects of ammonia on freshwater macroinvertebrates. Additionally, the ammonia water quality criteria, NOECs, LOECs, and long-term LCs are discussed on the basis of the current available data for freshwater macroinvertebrates.

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Population responses of the freshwater amphipod Gammarus pulex (L.) to an environmental estrogen, 17α‐ethinylestradiol

Watts

Pascoe

Carroll

2002

Enviro Toxic and Chemistry

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The effects of the environmental estrogen 17alpha-ethinylestradiol (EE) on mixed populations of 90 individual Gammarus pulex were examined following a 100-d exposure in a flow-through system. Counts of total animal numbers revealed that, in all treatment groups, population size dramatically increased due to recruitment, with neonate and juvenile gammarids the most abundant. At concentrations of 1 and 10 microg/L EE, the recorded mean population sizes of 385 and 411, respectively, were significantly greater (p = 0.018) than the control (169). Mean population sizes in the solvent control (257) and 100 ng/L EE treatment (267) were not significantly different (p > 0.05) from the control. In addition to total counts, detailed image analysis of each individual animal allowed the assessment of length-frequency distributions, adult sex ratio, number of precopula pairs/ovigerous females, and measurement of secondary antenna and gnathopod length (secondary sex characteristics). The sex ratio of adults at 100 ng, 1 microg, and 10 microg/L EE was greater than 2:1 (female:male), and significantly more females (p = 0.008) were recorded at these concentrations compared with the control. The number of male adults, precopula guarding pairs, and ovigerous females did not differ between treatments (p > 0.05). Secondary antennal and gnathopod length in males was consistently greater than in females (p < or = 0.001), but comparison between groups revealed no difference in these parameters.

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Survival and precopulatory behaviour of Gammarus pulex (L.) exposed to two xenoestrogens

Cited by 56 publications

References 18 publications

Effect of 17α-Ethinylestradiol on the Time Needed for Males and Females of Gammarus tigrinus Sexton, 1939 to Re-couple

Effect of 17α-Ethinylestradiol on the Time Needed for Males and Females of Gammarus tigrinus Sexton, 1939 to Re-couple

Long-Term Effects of Ammonia on the Behavioral Activity of the Aquatic Snail Potamopyrgus antipodarum (Hydrobiidae, Mollusca)

Population responses of the freshwater amphipod Gammarus pulex (L.) to an environmental estrogen, 17α‐ethinylestradiol

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