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Does Predation Risk Affect Mating Behavior? An Experimental Test in Dumpling Squid (Euprymna tasmanica)
TLDR
Inking is a common anti-predator defense in cephalopods thought to act like a smokescreen, decoy or distraction, and female dumpling squid are probably using this form of defense in response to the increase in predation risk prior to mating.
The energetic cost of mating in a promiscuous cephalopod
TLDR
The act of copulation halves the swimming endurance of both sexes, and that they take up to 30 min to recover, which may have important implications for predator avoidance, foraging ability and energy allocation.
Multimodal signals: ultraviolet reflectance and chemical cues in stomatopod agonistic encounters
TLDR
These results are the first to demonstrate that chemical and chromatic cues comprise a multimodal signal in stomatopod contests and provide new evidence that UV reflectance and/or visible spectrum luminance is used to amplify threat displays.
Stomatopods detect and assess achromatic cues in contests
TLDR
Fights over ownership of a refuge were shorter and more active when the resident stomatopod had a brightened meral spot, suggesting that stom atopods are more willing to engage in contests when their opponents have brighter meral spots.
Differences in resource allocation to reproduction across the intertidal-subtidal gradient for two suspension-feeding marine gastropods: Crepidula fornicata and Crepipatella peruviana
TLDR
This study adds to previous work showing how exceptionally well-adapted C. fornicata is to intertidal life, and may help to explain why this species has been so unusually successful as an invasive among calyptraeid gastropods.
Single and multiple mating reduces longevity of female dumpling squid (Euprymna tasmanica)
TLDR
The presence of an additive effect of reproduction on longevity suggests that multiple mating in cephalopods may have benefits that outweigh these costs, or that there is a conflict in optimal mating frequency between males and females.
Energetic effects for observed and unobserved HIV-1 reverse transcriptase mutations of residues L100, V106, and Y181 in the presence of nevirapine and efavirenz.
TLDR
The results of the calculations revealed that the variant that survives in patients dosed with either nevirapine or efavirenz had a more positive Delta Delta G value than other variants that were not observed in patients.
The Paradox of Iridescent Signals.
TLDR
It is argued that iridescent color patches can be reliable signals only if accompanied by specific adaptations to enhance reliability, such as structures and behaviors that limit perceived hue shift or enhance and control directionality.
Meral-Spot Reflectance Signals Weapon Performance in the Mantis Shrimp Neogonodactylus oerstedii (Stomatopoda)
TLDR
This work investigates whether a colored patch, the meral spot, signals weapon performance in the stomatopod Neogonodactylus oerstedii and finds that darker meral spots correlate with higher strike impulse, which reflects the total force integrated over time.
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