Results 181 to 190 of about 4,397 (232)

Histological organisation of the bathypelagic species Protoheterokrohnia bogutskayae (Chaetognatha: Tokiokaispadellidae) in the trunk–tail region

Zoosystematica Rossica
A histological study of the unique bathypelagic species Protoheterokrohnia bogutskayae Kassatkina, 2016 (Chaetognatha: Tokiokaispadellidae) was conducted.
M.V. Stolyarova, A. Kassatkina
semanticscholar   +1 more source

Chaetognaths (Chaetognatha: Sagittoidea) at the Boundary of the Pacific Ocean and the Gulf of California: Their Relationship with the Summer Circulation Pattern

Oceans
Chaetognaths play an essential role in zooplankton communities and significantly contribute to their overall biomass. Changes in the hydrographic properties of the water column, driven by hydrodynamic processes, affect their species richness and ...
Mitzi Paulina de La Rosa-Bernal, Elizabeth Durán-Campos, M. A. Monreal‐Gómez, Erik Coria-Monter, D. Salas‐de‐León, S. Cházaro-Olvera   +5 more
semanticscholar   +1 more source

Population structure, vertical distribution and fecundity of Eukrohnia hamata (Chaetognatha) in the Arctic Ocean during summer

, 2020
The population size structure, vertical distribution, gonad maturation, individual fecundity and embryonic development of the chaetognath Eukrohnia hamata were studied in the northernmost part of its distribution area, the Arctic Ocean.
K. Kosobokova, R. Hopcroft
semanticscholar   +1 more source

Evolutionary analyses of phylum Chaetognatha based on mitochondrial cytochrome oxidase I gene

, 2020
* Correspondence: devikamanoj.pillai@gmail ...
S. Peter, Manoj Kumar BHASKARAN NAIR, D. Pillai   +2 more
semanticscholar   +1 more source

Chaetognatha

2015
AbstractAccording to palaeontological evidence, Chaetognatha (arrow worms), a group of small marine predators that are major components of the zooplankton throughout our world oceans, were already present in the Early Cambrian Chengjang, in the Middle Cambrian Burgess Shale.
Steffen Harzsch, Yvan Perez, Carsten H.G. Müller   +2 more
openaire   +1 more source

CHAETOGNATHA

1950
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Chaetognatha

2017
This chapter describes the taxonomy of Chaetognatha, a small phylum of exclusively marine organisms with approximately 150 species currently recognized, of which about 70 are pelagic. Chaetognatha are also known as arrow worms because of their shape and quick darting movements in the water.
openaire   +5 more sources

Photoreception in Chaetognatha

1984
Chaetognaths have a pair of eyes below the epidermis on the dorsal surface of the head; an inverted type in the genus Sagitta and an everted type in the genus Eukrohnia. The inverted type is composed of capsule cells surrounding the external surface, one pigment cell at the center of the eye, photoreceptor cells extending distal processes into ...
T. Goto, M. Yoshida
openaire   +1 more source

The influence of environmental conditions on Parasagitta friderici (Chaetognatha) abundance in a subtropical estuary (south Brazil)

Journal of the Marine Biological Association of the United Kingdom, 2018
Estuarine chaetognath population dynamics are poorly known worldwide. We have conducted eight seasonal campaigns (October 2007–August 2008) sampling three sectors in the subtropical Babitonga Bay estuary (26°S 48°W) in order to depict chaetognath ...
Miodeli Nogueira Júnior, Everton Giachini Tosetto, E. Razzolini   +2 more
semanticscholar   +1 more source

Nervous System in Chaetognatha

1987
The nervous system of chaetognatha consists of 6 ganglia in the head region, one ventral ganglion in the body, nerves connecting these ganglia and peripheral nerves passing out of these ganglia. The ganglia in the head region are the cerebral ganglion, a pair of vestibular ganglia, a pair of oesophageal ganglia, and a suboesophageal ganglion.
T. Goto, M. Yoshida
openaire   +1 more source