Results 51 to 60 of about 5,335 (233)

Extreme Mitogenomic Variation Without Cryptic Speciation in Chaetognaths

open access: yesbioRxiv, 2015
The extent of within-species genetic variation across the diversity of animal life is a fundamental but largely unexplored problem in ecology and evolution.
Ferdinand Marlétaz   +3 more
semanticscholar   +1 more source

Abundance, condition, and diet of juvenile Pacific ocean perch (Sebastes alutus) in the Aleutian Islands [PDF]

open access: yes, 2009
T he relative value of pelagic habitat for three size classes of juvenile Pacific ocean perch (Sebastes alutus) was investigated by comparing their abundance and condition in two areas of the Aleutian Islands. Diet, zooplankton biomass, and water column
Boldt, Jennifer L.   +1 more
core  

Relationships between acoustic scattering layers and ocean stratification: An acoustic approach to estimate mixed layer depth

open access: yesLimnology and Oceanography: Methods, Volume 24, Issue 3, March 2026.
Abstract Ocean stratification, measured as mixed layer depth (MLD), is an important feature that influences many processes in the ocean; for example, by mediating the fluxes of momentum, heat and crucially key gases such as CO2 and oxygen from the atmosphere into the water column and vice versa. The conventional methods to measure stratification (e.g.,
Fabio Campanella   +2 more
wiley   +1 more source

Chaetognath ecology in relation to hydrographic conditions in the Australian sector of the Antarctic Ocean [PDF]

open access: yes, 2004
Chaetognath ecology in relation to hydrographic conditions was investigated during austral summer in the Antarctic Ocean with two cruises conducted seven years apart.
Johnson,Travis B., Terazaki,Makoto
core   +1 more source

Metabarcoding and biomass quantification reveal seasonal parasite associations in copepods

open access: yesLimnology and Oceanography, Volume 71, Issue 2, February 2026.
Abstract Parasites are important members of ecosystems, and recent metabarcoding efforts have revealed an abundance of microbial eukaryotic parasites in copepods. However, a putative linkage to host community biomass and composition has not been addressed. We performed zooplankton tows monthly for 2 yr at five stations in the Oslofjord, Norway.
Lasse Krøger Eliassen   +4 more
wiley   +1 more source

Latitudinal distribution of chaetognaths in winter along the 137°E meridian in the Philippine Sea

open access: yes, 2015
Latitudinal distributions of pelagic chaetognaths from 3–34°N along the 137°E meridian in the Philippine Sea in winter from 1967 to 1995 were studied using the data of oceanographic observations by the Japan Meteorological Agency.
N. Nagai   +3 more
semanticscholar   +1 more source

The Role of Zooplankton Predator, Chaetognaths (Sagitta Spp) in Baguala Bay Waters, Ambon Island [PDF]

open access: yes, 2002
Study on the chaetognaths of the Baguala bay waters, Ambon island has been done at approximately monthly intervals during January to March and May to September 1994.
Huliselan, N. V. (Niette)
core  

Occurrence of small microplastics in the salp Salpa fusiformis in the Kuroshio region

open access: yesLimnology and Oceanography, Volume 71, Issue 2, February 2026.
Abstract We investigated the occurrence pattern of Salpa fusiformis, broad‐spectrum filter‐feeding zooplankton that intercept small particles around the Kuroshio Current, off southern Japan and inferred in situ distribution of near‐surface small microplastics (plastic particles < 330 μm) based on their gut contents.
Kengo Egami   +7 more
wiley   +1 more source

New group of the Early Palaeozoic conodont-like fossils [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
The paper is devoted to the Upper Cambrian and Tremadocian organophosphatic microfossils which were hitherto treated as conodonts and assigned mainly to the genera Coelocerodontus and Viirodus.
Hubert Szaniawski
doaj   +1 more source

A Large Cambrian Chaetognath with Supernumerary Grasping Spines [PDF]

open access: yesCurrent Biology, 2017
Chaetognaths (arrow worms) are a separate phylum (Chaetognatha) of small carnivorous animals, dominantly pelagic, and a major component of today's plankton [1, 2]. The position of Chaetognatha among metazoan phyla remains equivocal-neither morphological nor molecular data provide definitive evidence [3]. Originating early in the Cambrian period [4], if
Derek E G, Briggs, Jean-Bernard, Caron
openaire   +2 more sources

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