Cephalopods and Marine Biology

This study shows that environmental conditions and age influence chromatophore density and size in squid, revealing a trade-off between number and expansion of color cells.

This study examines how cuttlefish sucker papillae interact with substrate roughness to enhance attachment performance, finding optimal forces when substrate roughness matches papillae height.

This paper presents a protocol for non-invasively determining the sex of cephalopods using skin swabs and qPCR, applicable to multiple species as early as 3 hours post-hatching.

The paper uses computer vision and dimensionality reduction to analyze chromatophore motor control in cephalopods, revealing the organization of motor units and their neural control.

The paper investigates factors influencing brain size in cephalopods, finding ecological factors, not social ones, are more strongly associated with larger brain sizes.

The paper presents a chromosome-scale genome assembly of the common cuttlefish Sepia officinalis, revealing its true karyotype and identifying cephalopod-specific gene expansions.

The paper identifies multiple longitudinal fiber tracts in the cephalopod arm sensorimotor system, revealing intrinsic connections for coordinated arm and sucker movements.

This paper develops a non-invasive method to genotype cephalopod sex using quantitative PCR, validated across multiple species and sequencing data.

The paper presents two annotated de novo transcriptome assemblies from juvenile cuttlefish under various metal and pCO2 exposure conditions, revealing age-specific transcriptomic landscapes.

This study characterizes the Sepiola affinis squid-vibrio symbiosis, identifying two new Vibrio species and describing the light-organ morphology and temperature preferences of the symbionts.

The paper identifies 51 potential nociceptive genes in Octopus vulgaris using a bioinformatic pipeline and validates 18 in C. elegans through loss-of-function experiments.

This study examines the developmental and transcriptomic responses of Hawaiian bobtail squid to ocean warming and acidification, finding trade-offs in metabolism versus development and molecular changes like alternative splicing.

This paper develops a model of episodic-like memory in cuttlefish behavior, showing how memory access influences decision-making in predator-prey scenarios.

The paper introduces a modified tonic immobility method for octopuses to study local sensorimotor responses and arm-sucker coordination without full anesthesia.

The paper shows octopuses use odor plumes to find food in the dark, exhibiting behaviors like upstream movement and odor-gated rheotaxis, suggesting suckers, not bilateral organs, are the primary chemosensory organs.

The paper presents the chromosome-level genome assembly of Stigmatoteuthis arcturi, providing insights into the evolutionary biology of deep-sea squids.

CHROMAS tracks and analyzes chromatophore dynamics from high-resolution videos of cephalopods, revealing motor control details and distributed motor units.

The paper describes play behavior in captive California Two-Spot Octopuses to better understand their behavioral repertoire and welfare.

This study examines how climate-driven warming affects the symbiotic relationship between the bobtail squid Euprymna scolopes and the bacterium Vibrio fischeri, finding reduced hatching success, lower survival, and diminished symbiosis capacity under higher temperatures.

This study examines the cellular organization and molecular composition of the octopus sucker ganglion, revealing its role in local reflexes rather than as a simple relay for the axial nerve cord.

This study uses microscopy to show how the structure of a squid organ houses and deploys bacteria for egg defense.

This study shows that microbiomes on ecological surfaces activate octopus chemotactile receptors to guide behavior through distinct molecular signals.

This study presents the first chromosome-scale genome of a female California two-spot octopus, revealing a ZO sex chromosome system and demonstrating the ancient origin of the sex chromosome in cephalopods.

This study describes the segmented neuronal organization of the octopus arm's axial nerve cord, revealing modular structure and functional implications for motor control.

This study uses a judgment bias task to show that stress induces pessimistic behavior in cuttlefish, indicating a negative affective state.

This study evaluates the activity of digestive enzymes in Octopus maya, finding that acidic proteases are more active at higher temperatures than alkaline proteases, with lower activation energy for alkaline enzymes.

The paper presents a chromosome-level genome assembly for the common octopus, O. vulgaris, which spans 2.8 billion basepairs and supports a karyotype of 1n=30 chromosomes.

This study uses calcium imaging to map visual responses in the octopus optic lobe, revealing retinotopic organization and unique processing of ON/OFF stimuli.

The paper creates a brain atlas of the dwarf cuttlefish using MRI, deep learning, and histology, identifying 32 brain regions and providing an interactive web tool for data access.

This study identifies RNA recoding in cephalopods that enhances kinesin function in response to cold and reveals tissue-specific variants with distinct motile properties.