Effects of sex and color phase on ion regulation in the invasive European green crab, Carcinus maenas

Pennoyer, Kelly E.; Himes, Anthony; Frederich, Markus

doi:10.1007/s00227-016-2910-2

Cited by 10 publications

(5 citation statements)

References 63 publications

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“…Males and females behaved as hyper/hypo-osmoregulators since they exhibited haemolymph osmolality values higher and lower than those of the corresponding aquatic environment upon acclimation to low (12 psu) and high (55 psu) salinity, respectively, while osmoconforming at 33 psu (Figure 1A, B). This differs to recent results in females of the euryhaline crab Carcinus maenas which showed an increased ability to maintain their internal osmolality compared with males upon exposure to low salinity (Pennoyer et al , 2016). The higher osmoregulatory capacity in both males and females of U. tangeri at high salinity (55 psu) compared with that in low salinity (12 psu), suggests a higher ability for hypo-osmoregulation.…”

Section: Discussioncontrasting

confidence: 99%

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The euryhaline crabUca tangerishowed metabolic differences to sex and environmental salinity

et al. 2017

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This study constitutes a first attempt to investigate sex differences in osmoregulatory capacity and metabolic responses in relation to hyper- and hypo-osmoregulation in the intertidal euryhaline crab Uca tangeri. Adult male and female specimens from Cadiz Bay, Spain (36°23′–37′N 6°8′–15′W), were acclimated to three different environmental salinities (12, 33 and 55 psu) during 7 days, and several parameters were assessed in haemolymph (osmolality, glucose, amino acids, triglycerides and lactate) as well as in metabolic key organs (hepatopancreas, anterior and posterior gills: glycogen, free glucose, amino acids and triglycerides). Specimens from both sex exhibited high and similar hyper- and hypo-osmoregulatory capacities. However, metabolite levels were differentially affected upon acclimation to low and high salinity in several metabolic organs and haemolymph of male and females: (i) glycogen in gills, (ii) free glucose in gills and hepatopancreas, (iii) amino acids in hepatopancreas, (iv) triglycerides in haemolymph, hepatopancreas and posterior gills, and (v) lactate in haemolymph. The results suggest the occurrence of differential metabolic adjustments upon hyper- and hypo-osmoregulation related to sex in the intertidal euryhaline crab U. tangeri.

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Section: Discussioncontrasting

confidence: 99%

“…Moreover, studies on metabolic adjustments in responses to key environmental factors, such as salinity, and possible sex differences are lacking. Recently the importance of taking into account the potential sex differences in physiological studies of the euryhaline crab Carcinus maenas has been pointed out (Pennoyer et al , 2016).…”

Section: Introductionmentioning

confidence: 99%

The euryhaline crabUca tangerishowed metabolic differences to sex and environmental salinity

et al. 2017

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“…We compared eDNA release between when C. maenas were resting and running on an underwater treadmill. The treadmill consisted of an acrylic aquarium and a motorized belt (30 × 20 cm) and perforated box (20 × 19 × 14 cm; L × W × H) to keep the crabs centered on the treadmill [ 54 ]. Before use, the treadmill was sterilized with 10% bleach and rinsed with deionized water.…”

Section: Methodsmentioning

confidence: 99%

Limitations of eDNA analysis for Carcinus maenas abundance estimations

2022

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Background Environmental DNA (eDNA) is an effective tool for the detection and monitoring of presence or absence of rare and invasive species. These techniques have been extended to quantify biomass in vertebrates, particularly in fish species. However, the efficacy of eDNA techniques to quantify biomass in invertebrate species has rarely been examined. This study tested whether eDNA could be used to determine the biomass of the world-wide invasive green crab, Carcinus maenas. In a controlled laboratory study, the relationship between biomass and C. maenas eDNA concentration was examined in the context of different biotic (activity) and abiotic (temperature) parameters. Results When incubating different numbers of crabs in sterile saltwater for up to 7 days, a relationship between eDNA concentration and biomass was observed at temperatures of 6.7 ℃ and 18.7 ℃, but not at 12.8 ℃. Additionally, motor activity, aggression level, time of sampling, and features of organismal decay had significant impact on the concentration of C. maenas eDNA collected. Conclusions We show that eDNA concentration did not correlate with biomass, and that biomass, temperature, organismal characteristics, and potentially many more parameters affect shedding and degradation rates for eDNA in this species, thus, impacting the recoverable eDNA concentration. Therefore, eDNA techniques are not likely to provide a reliable signal of biomass in the invasive invertebrate species C. maenas.

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“…In contrast, the crab's sex, has been linked with increased richness in male gut bacteria (Cuellar-Gempeler and Munguia [63]). This diversity effect of sex can be mediated by physiological [64][65][66], or behavioral [67,68] differences between fiddler crab males and females. Importantly, to decipher the role of host factors and habitat filters on bacterial community diveristy and composition, we must first investigate the influence of colonization.…”

Section: Introductionmentioning

confidence: 99%

Multiple colonist pools shape fiddler crab-associated bacterial communities

Cuellar-Gempeler

Leibold

2018

The ISME Journal

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Colonization is a key component of community assembly because it continuously contributes new species that can potentially establish and adds individuals to established populations in local communities. Colonization is determined by the regional species pool, which is typically viewed as stable at ecological time scales. Yet, many natural communities including plants, birds and microbes, are exposed to several distinct and dynamic sources of colonists and how multiple colonist pools interact to shape local communities remains unclear. Using a 16S rRNA amplicon survey, we profiled bacteria within surface, subsurface and burrow sediments and assessed their role as colonist pools for fiddler crab-associated bacteria. We found significant differences in composition among sediment types, driven by halophilic taxa in the surface, and different Desulfobacteraceae taxa in the subsurface and burrow. Bacteria from burrow sediment colonized the crab carapace whereas gut bacterial communities were colonized by burrow and surface sediment bacteria. Despite distinct colonist pools influencing gut bacteria, variation in composition across gut samples did not lead to significant clusters. In contrast, carapace bacterial communities clustered in six distinct groups loosely associated with crab species. Our findings suggest that multiple colonist pools can influence local communities but factors explaining variation in community composition depend on local habitats. Recognizing multiple colonist pools expands our understanding of the interaction between regional and local processes driving community structure and diversity.

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Effects of sex and color phase on ion regulation in the invasive European green crab, Carcinus maenas

Cited by 10 publications

References 63 publications

The euryhaline crabUca tangerishowed metabolic differences to sex and environmental salinity

The euryhaline crabUca tangerishowed metabolic differences to sex and environmental salinity

Limitations of eDNA analysis for Carcinus maenas abundance estimations

Multiple colonist pools shape fiddler crab-associated bacterial communities

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