Results 21 to 30 of about 1,574 (153)

The shell structure and chamber production cycle of the cephalopod Spirula (Coleoidea, Decapodiformes)

, 2022
Abstract The coleoid cephalopod Spirula spirula, the only present-day representative of the coleoid order Spirulida, secretes a coiled shell consisting of a series of chambers divided by septa and connected by a siphuncle. It is the shell closest to those of ectochleate cephalopods: nautiloids, ammonoids.
Antonio G. Checa, Christian Grenier, Erika Griesshaber, Wolfgang W. Schmahl, Julyan H.E. Cartwright, Carmen Salas, Morgane Oudot   +6 more
openaire   +1 more source

The cuttlefish Sepia officinalis (Sepiidae, Cephalopoda) constructs cuttlebone from a liquid-crystal precursor [PDF]

, 2015
Cuttlebone, the sophisticated buoyancy device of cuttlefish, is made of extensive superposed chambers that have a complex internal arrangement of calcified pillars and organic membranes. It has not been clear how this structure is assembled. We find that
A Appellöff, AC Neville, AC Neville, C Sanchez, EA Zimmermann, EJ Denton, G Falini, H Mutvei, H Mutvei, J Blackwell, J Nase, J Reitner, JD Birchall, JHE Cartwright, JHE Cartwright, JHE Cartwright, JHE Cartwright, K Bandel, K Tanabe, LA Doguzhaeva, MJ Vendrasco, N Okafor, PE Hare, PG Saffman, RE Young, RE Young, RH Hackman, RH Hackman, S Hunt, S Weiner, S Weiner, UGK Wegst, Y Bouligand, Y Bouligand, Y Bouligand, Y Dauphin, Y Levi-Kalisman   +36 more
core   +5 more sources

Coupled Genomic Evolutionary Histories as Signatures of Organismal Innovations in Cephalopods

BioEssays, Volume 41, Issue 12, December 2019., 2019
How genomic innovation translates into organismal organization remains largely unanswered. Cephalopods provide a unique model system to investigate how organismal novelties evolve. Here, it is discussed how co‐evolutionary signatures among various genomic characters have contributed to cephalopod organismal novelties and can be used to dissect their ...
Elena A. Ritschard, Brooke Whitelaw, Caroline B. Albertin, Ira R. Cooke, Jan M. Strugnell, Oleg Simakov   +5 more
wiley   +1 more source

Fine structure and optical properties of biological polarizers in crustaceans and cephalopods [PDF]

, 2008
The lighting of the underwater environment is constantly changing due to attenuation by water, scattering by suspended particles, as well as the refraction and reflection caused by the surface waves.
Caldwell, Roy L., Chiou, Tsyr-Huei, Cronin, Thomas W., Hanlon, Roger T.   +3 more
core   +1 more source

A novel metabarcoding primer pair for environmental DNA analysis of Cephalopoda (Mollusca) targeting the nuclear 18S rRNA region [PDF]

, 2021
Cephalopods are pivotal components of marine food webs, but biodiversity studies are hampered by challenges to sample these agile marine molluscs. Metabarcoding of environmental DNA (eDNA) is a potentially powerful technique to study oceanic cephalopod ...
Bayer, Till, de Jonge, Daniëlle S. W., Hoving, Henk-Jan T., Merten, Veronique, Puebla, Oscar, Reusch, Thorsten B. H.   +5 more
core   +2 more sources

Unravelling the phylogenetic and ecological drivers of beak shape variability in cephalopods [PDF]

, 2023
19 pages, 5 figures, 4 tables, supplementary Information https://doi.org/10.1007/s11160-022-09744-5.-- Data availability: Genetic data underlying this article are available in the GenBank Nucleotide Database at https://www.ncbi.nlm.nih.gov/genbank/ and ...
Allcock, A. Louise, Escolar, Oscar, Farré, Marc, Fernández-Álvarez, Fernando, Kaliontzopoulou, Antigoni, Navarro, Joan, Sánchez-Márquez, Antoni, Taite, Morag, Villanueva, Roger   +8 more
core   +3 more sources

High-Density Genetic Linkage Map of the Southern Blue-ringed Octopus (Octopodidae: Hapalochlaena maculosa) [PDF]

, 2022
Genetic linkage maps provide a useful resource for non-model genomes and can aid in genome reassembly to form more contiguous pseudo-chromosomes. We present the first linkage map of any cephalopod, H. maculosa, composed of 47 linkage groups (LG). A total
Cooke, Ira R., Guppy, Jarrod, Jones, David B., Morse, Peter, Strugnell, Jan M., Whitelaw, Brooke L., Zenger, Kyall   +6 more
core   +2 more sources

Cephalopod Brains: An Overview of Current Knowledge to Facilitate Comparison With Vertebrates. [PDF]

, 2018
Cephalopod and vertebrate neural-systems are often highlighted as a traditional example of convergent evolution. Their large brains, relative to body size, and complexity of sensory-motor systems and behavioral repertoires offer opportunities for ...
Giovanna Ponte, Graziano Fiorito, Paul L. R. Andrews, Paul L. R. Andrews, Shuichi Shigeno   +4 more
core   +2 more sources

Evaluating and Advancing the Use of Shore‐Based Observers for Scientific Sampling and Catch Verification in High‐Volume Fisheries

Fisheries Management and Ecology, Volume 33, Issue 3, Page 612-629, June 2026.
ABSTRACT Shore‐based observers are increasingly being used in place of at‐sea observers to monitor and sample commercial fisheries catch. However, few evaluations assess whether these programs meet their stated goals or how to optimize them, and industry data are rarely tested for accuracy despite serving as the foundation for catch accounting. Using a
Christian Gredzens, Andy Kingham, Jason E. Jannot   +2 more
wiley   +1 more source

Cephalopod classification and taxonomy [PDF]

, 2015
Chambered nautilus, cuttlefishes, squids and octopus are the four major groups of cephalopods, which belong to the highly evolved class of phylum Mollusca. Cephalopods are the third largest molluscan class after bivalves and gastropods and consist of
Mohamed, K S, Venkatesan, V
core