Sex and burrow/chimney ownership affecting time allocation for surface activities in Uca rosea (Tweedie, 1937) (Brachyura, Ocypodidae)

Tina, Fahmida Wazed; Jaroensutasinee, Mullica; Keeratipattarakarn, Kanitta; Jaroensutasinee, Krisanadej

doi:10.1163/15685403-00003731

Cited by 9 publications

(10 citation statements)

References 22 publications

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“…This pattern was not observed in the current study for U. tangeri. In general, feeding was the most observed behavior for U. tangeri in the Royal Burgers' Zoo, which has also been observed for other species (Caravello & Cameron, 1991;Tina, Jaroensutasinee, Keeratipattarakarn, & Jaroensutasinee, 2018;Weis & Weis, 2004). The present results show that from the time that the water recedes to the hours after that, U. rapax males initially are either stationary or feeding and that this behavior continues again in the afternoon.…”

Section: Discussionsupporting

confidence: 83%

Behavioral patterns of two fiddler crab species Uca rapax and Uca tangeri in a seminatural mangrove system

et al. 2019

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Zoos increasingly transform their exhibitions from traditional one‐species enclosures to more natural exhibits, that is, environments that capture part of an ecosystem including a selection of animals and plants that occur there. Thus, enhancing the experience of its human visitors while also allowing its residents to possibly show more natural behavior. In 2017 Royal Burger's Zoo (Arnhem, The Netherlands) created and opened a mangrove‐like environment containing fiddler crabs. Fiddler crabs display a broad range of behaviors, and this research examines which wild‐type behavior and behavioral patterns can be observed on a seminatural mudflat. The behavior shown by Uca rapax and Uca tangeri on the mudflat was counted each hour between 07:00 and 17:00. An asymmetric tidal regime was present in the enclosure including two high water periods. Various known fiddler crab behaviors, including waving and combat, were observed but no copulation. A clear pattern in exposed crabs on the mudflat was found, with low numbers visible in the early morning and the highest numbers present in the early afternoon, while number of visitors did not have a significant effect on this pattern. Interestingly, the highest abundances were not observed around the ebbing tide (07:00–09:00), as observed in the wild, but somewhat later, possibly due to the asymmetric tidal scheme or the interaction of tidal and daily rhythms. This study shows that in captivity, fiddler crabs indeed show a range of natural behaviors which is linked to the tidal and possibly daily rhythm as well.

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Section: Discussionsupporting

confidence: 83%

Behavioral patterns of two fiddler crab species Uca rapax and Uca tangeri in a seminatural mangrove system

et al. 2019

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“…Agonistic behavior is an innate behavior in many decapod crustacean animals, such as the freshwater crayfish ( Astacus leptodactylus eschscholtz ), mud crab ( Scylla serrata ), swimming crab ( Portunus trituberculatus ), and Chinese mitten crab ( Eriocheir sinensis ). − Many factors affect agonistic behavior in crustaceans, including sex differences, body size, and reproductive state . Serotonin (5-HT) and dopamine (DA), as two important neurotransmitters, can affect the animals’ physiological activity, and feeding, reproductive, and phototactic behaviors .…”

Section: Introductionmentioning

confidence: 99%

5-HT2B, 5-HT7, and DA2 Receptors Mediate the Effects of 5-HT and DA on Agonistic Behavior of the Chinese Mitten Crab (Eriocheir sinensis)

Pang

Song

Zhang

et al. 2019

ACS Chem. Neurosci.

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The Chinese mitten crab (Eriocheir sinensis) is a commercially important crab in China and is usually managed at high stocking densities. Agonistic behavior directly impacts crab integrity, survival, and growth and results in economic losses. In the present study, we evaluated the modulatory effects of serotonin (5-HT) and dopamine (DA) though the 5-HT2 and DA2 receptor-cyclic adenosine monophosphate (cAMP)-protein kinase A (PKA) pathway on agonistic behavior. The results showed that injection of either 10–6 mol/crab 5-HT or DA reduced the agonistic behavior of E. sinensis (P < 0.05), as did 10–10 mol/crab DA and 10–8 mol/crab 5-HT and DA (P < 0.05); however, a dose of 10–10 mol/crab 5-HT promoted agonistic behavior. 5-HT significantly increased the mRNA expression level of 5-HT7 receptor and reduced that of the DA2 receptor in the cerebral ganglion (P < 0.05). In contrast to 5-HT, DA significantly decreased 5-HT2B mRNA levels and increased 5-HT7 and DA2 receptor levels in the thoracic ganglia (P < 0.05). In addition, injections of either 5-HT or DA increased the cAMP and PKA levels in hemolymph (P < 0.05). By using in vitro culture of the thoracic ganglia, the current study showed that ketanserin (5-HT2 antagonist) and [R(−)-TNPA] (DA2 agonist) had obvious effects on the expression levels of the two receptors (P < 0.05). In vivo experiments further demonstrated that ketanserin and [R(−)-TNPA] could both significantly reduce the agonistic behavior of the crabs (P < 0.05). Furthermore, both ketanserin and [R(−)-TNPA] promoted the cAMP and PKA levels (P < 0.05). The injection of CPT-cAMP (cAMP analogue) elevated the PKA levels and inhibited agonistic behavior. In summary, this study showed that 5HT-2B and DA2 receptors were involved in the agonistic behavior that 5-HT/DA induced through the cAMP-PKA pathway in E. sinensis.

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“…The chimneys this species builds seem to reduce agonistic interactions and improve burrow defense against intruders (Tina et al 2017a). Consistent with results by Slatyer et al (2008), chimney owners spend less time feeding compared to crabs with no chimneys (Tina et al 2018a). The energetic cost of building a chimney may require builders to feed faster, also as suggested by Slatyer et al (2008).…”

Section: Chimneymentioning

confidence: 53%

Fiddler crabs and their above-ground sedimentary structures: a review

Pardo

Stefanelli-Silva

Christy

et al. 2020

J Ethol

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Fiddler crabs are abundant, semi-terrestrial crustaceans inhabiting tropical, subtropical and warm temperate coasts worldwide. Some species build above-ground sedimentary structures at or near the opening to their burrows. The functions and shapes of these constructions vary interspecifically and according to the sex of the builder. Here, we compile the dispersed reports on these structures, suggest uniform naming for different shapes, review explanations for their functions and explore associations between the attributes of builders and their structures. We found that 47 fiddler crab species build at least one type (or subtype) of structure, including chimneys, hoods, pillars, semidomes, mudballs, and rims. Sedimentary structures show a strong association with sediment type as well as builder front type, genus and sex, but not with fiddler crab clade. Experimental studies have revealed distinct, sometimes multiple functions for some of these structures (e.g., female attraction, reduction of aggressive behavior and/or landmark orientation); however, most studies have been observational leaving the proposed functions of these structures for many species untested. Both field and laboratory experiments as well as observational studies can help us to better understand these sedimentary structures and their role in fiddler crab behavior and ecology.

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Sex and burrow/chimney ownership affecting time allocation for surface activities in Uca rosea (Tweedie, 1937) (Brachyura, Ocypodidae)

Cited by 9 publications

References 22 publications

Behavioral patterns of two fiddler crab species Uca rapax and Uca tangeri in a seminatural mangrove system

Behavioral patterns of two fiddler crab species Uca rapax and Uca tangeri in a seminatural mangrove system

5-HT2B, 5-HT7, and DA2 Receptors Mediate the Effects of 5-HT and DA on Agonistic Behavior of the Chinese Mitten Crab (Eriocheir sinensis)

Fiddler crabs and their above-ground sedimentary structures: a review

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