Hard-shell mating in Neohelice granulata: the role of ecdysone in female receptivity and mate attraction

AbstractPlayback experiments were used to study the role of vocalization in mate attraction by Manx shearwaters, a nocturnal seabird. Pre-breeding birds were exposed to test calls of male and female shearwaters calling from the range of normal locations: above the colony as in a flyover call, on the ground in the colony, or from within the nesting burrow. Both female and male test calls increased the frequency of male calling but only male calls increased the frequency of female calling. These findings suggest that male calls 1) facilitated competing responses from other males that are attempting to attract females to their burrows and 2) stimulated calling in available females that require more directional information to find the advertising male. Male calling location, inside or outside the burrow, probably reflected a compromise between being audible to females and being susceptible to predation. Because the call was more widely broadcast, male test calls played from outside the burrow caused more females to land in the colony than the same call played from inside the burrow. However in a simultaneous choice test between a burrow and an outside male test call, males calling from inside did not lose females to the adjacent outside male. Thus calling from inside the burrow in an area where another male is calling outside maximized female attraction while minimizing risk of predation. The male call played from inside the burrow attracted as many females as a pair call from inside but the response of females to the pair was less sustained, indicating that duetting pairs-inhibited the response of unpaired females. Male and female calls emanating from above the colony suppressed the rate of female flyover calls suggesting that during this test condition other birds stopped calling in an attempt to orient to the source of the test call.

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The effects of UV radiation on the visual system of the crab Neohelice granulata: A protective role of melatonin

Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology ◽

10.1016/j.cbpc.2011.08.002 ◽

2011 ◽

Vol 154 (4) ◽

pp. 427-434 ◽

Cited By ~ 3

Author(s):

Marcelo Alves Vargas ◽

Márcio Alberto Geihs ◽

Fábio Everton Maciel ◽

Bruno Pinto Cruz ◽

Luiz Eduardo Maia Nery ◽

...

Keyword(s):

Visual System ◽

Uv Radiation ◽

Protective Role ◽

Neohelice Granulata

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Differential modulation after feeding in different salinities and response to abscisic acid (ABA) and extracellular Ca2+ of aminopeptidase N (APN) activity in the hepatopancreas of the intertidal euryhaline crab Neohelice granulata

Canadian Journal of Zoology ◽

10.1139/cjz-2019-0163 ◽

2020 ◽

Vol 98 (4) ◽

pp. 262-268

Author(s):

M.S. Michiels ◽

G.R. Daleo ◽

A.A. López Mañanes

Keyword(s):

Enzyme Activity ◽

Abscisic Acid ◽

Digestive Tract ◽

Digestive Enzyme ◽

Aminopeptidase N ◽

Differential Modulation ◽

Model Species ◽

Main Site ◽

Neohelice Granulata

Modulation of aminopeptidase N (APN) activity in the digestive tract by various factors would be important to adjust digestive and absorptive processes under different physiological and (or) environmental conditions. We studied the postprandial responses at different salinities and the effect of abscisic acid (ABA) and extracellular Ca2+ on APN activity in the hepatopancreas (the main site for nutrient digestion and absorption) of the model species Neohelice granulata (Dana, 1851). Enzyme activity was determined at different times (0, 24, 48, and 72 h) after feeding in crabs acclimated either to 35 psu (osmoconformation) or 10 psu (hyper-regulation). APN activity increased around 50% at 24 h after feeding at 35 psu, whereas no changes occurred at 10 psu. Enzyme activity was also assayed in the presence of ABA (1 × 10–4 mol·L–1) or extracellular Ca2+ (1 × 10–4 mol·L–1), showing increments of 60% and 56%, respectively. The results suggest a role of APN in postprandial adjustments and its modulation by different chemical messengers by direct effect on the hepatopancreas. Moreover, to our knowledge, this work is the first to show the effect of ABA on a digestive enzyme in the digestive tract of an animal.

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Lipase activity sensitive to dopamine, glucagon and cyclic AMP in the hepatopancreas of the euryhaline burrowing crab Neohelice granulata (Dana, 1851) (Decapoda, Grapsidae)

Crustaceana ◽

10.1163/15685403-00003399 ◽

2015 ◽

Vol 88 (1) ◽

pp. 51-65 ◽

Cited By ~ 6

Author(s):

María S. Michiels ◽

Juana C. del Valle ◽

Alejandra A. López Mañanes

Keyword(s):

Cyclic Amp ◽

Direct Effect ◽

Lipase Activity ◽

Ecological Research ◽

Biochemical Characteristics ◽

Neohelice Granulata ◽

Concomitant Decrease ◽

Heat Tolerant ◽

Burrowing Crab

We studied the biochemical characteristics and modulation by dopamine, glucagon and cAMP of lipase activity in hepatopancreas of the euryhaline crabNeohelice granulata(Dana, 1851), considered to be an emergent model for biochemical, physiological and ecological research. Lipase activity was maximum at pH 8.5; it exhibited Michaelis-Menten kinetics (apparent ), was highest at 37°C but appeared to be cold- and heat-tolerant, since it was high at 4°C and at 45°C. Lipase activity was enhanced upon incubation of hepatopancreas with 10−4 M dopamine (about 100%), 2 × 10−3 M glucagon (about 250%) and 10−4 M cAMP (about 150%) suggesting a role of these chemical messengers in mechanisms of regulation of lipolytic activities and its direct effect on the hepatopancreas. The concomitant decrease in triglycerides content upon dopamine and cAMP treatment suggests a link between enhanced lipase activity by these messengers and triglycerides catabolism.

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Digestive flexibility in a euryhaline crab from a SW Atlantic coastal lagoon: alkaline phosphatase activity sensitive to salinity in the hepatopancreas

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315415000570 ◽

2015 ◽

Vol 95 (6) ◽

pp. 1133-1140 ◽

Cited By ~ 7

Author(s):

Silvina Andrea Pinoni ◽

Eugenia Méndez ◽

Alejandra Antonia López Mañanes

Keyword(s):

Alkaline Phosphatase ◽

Coastal Lagoon ◽

Buenos Aires Province ◽

Neohelice Granulata ◽

Low Salinity ◽

Sw Atlantic ◽

Short And Long Term ◽

Biochemical Level

We studied biochemical characteristics and the response to low salinity at short and long-term after feeding of alkaline phosphatase (AP) activity in hepatopancreas of the osmoregulator crab Neohelice granulata from Mar Chiquita coastal lagoon (Buenos Aires Province, Argentina) (37°32′–37°45′S 57°19′–57°26′W). The hepatopancreas exhibited a levamisole-insensitive and a levamisole-sensitive AP activity with distinct characteristics. Levamisole-insensitive activity was similar within the range of pH 7.4–9.0 and exhibited a Michaelis–Menten kinetics. Levamisole-sensitive AP activity appeared to be maximal at pH 8.5 and appeared to exhibit an allosteric kinetics. In crabs acclimated to 10 psu (hyper-regulation conditions) levamisole-insensitive and levamisole-sensitive AP activity increased (about 16-fold) over time from short term (2–4 h) to long term (120 h) after feeding while no changes occurred in crabs acclimated to 35 psu (osmoconforming conditions). The changes of AP activity along with the higher values at 120 h after feeding in 10 psu compared with those in 35 psu, and the concomitant changes in proteolytic activity, suggest a role of AP in digestive and metabolic adjustments at the biochemical level upon hyper-regulatory conditions.

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Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽

10.1001/jama.195.12.1005 ◽

1966 ◽

Vol 195 (12) ◽

pp. 1005-1009 ◽

Cited By ~ 18

Author(s):

D. J. Fernbach

Keyword(s):

Wilms Tumor

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Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽

10.1001/jama.195.3.167 ◽

1966 ◽

Vol 195 (3) ◽

pp. 167-172 ◽

Cited By ~ 2

Author(s):

T. E. Van Metre

Keyword(s):

Diagnosis And Management

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The power of norms to sway fused group members

Behavioral and Brain Sciences ◽

10.1017/s0140525x18001644 ◽

2018 ◽

Vol 41 ◽

Cited By ~ 1

Author(s):

Winnifred R. Louis ◽

Craig McGarty ◽

Emma F. Thomas ◽

Catherine E. Amiot ◽

Fathali M. Moghaddam

Keyword(s):

Evolutionary Anthropology ◽

Normative Systems ◽

Violent Extremism ◽

Identity Fusion ◽

Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

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Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

Behavioral and Brain Sciences ◽

10.1017/s0140525x18000274 ◽

2018 ◽

Vol 41 ◽

Author(s):

Kevin Arceneaux

Keyword(s):

Decision Making ◽

Individual Differences ◽

Cognitive Processes ◽

Evolutionary History ◽

Behavioral Responses ◽

History Of ◽

Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

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