Results 61 to 70 of about 1,108 (203)

The Role of Antifreeze Proteins in the Antarctic Fish, Notothenioidei [PDF]

open access: yes, 2003
The changing decrease in temperature of the southern ocean in geological history has lead to the extensive radiation of a group of fish, the suborder Notothenioidei.
Poirot, Ceisha
core  

Reproductive biology of female Antarctic spiny plunderfish Harpagifer spinosus (Notothenioidei: Harpagiferidae), from Îles Crozet [PDF]

open access: yes, 2004
On the basis of histological examination, we present the first description of oogenesis in H. spinosus. Eight stages of oocyte development were identified using morphological and histochemical criteria.
Van Der Molen, Silvina   +1 more
core   +1 more source

Gill arches of fishes of the suborder Notothenioidei (Pisces, Perciformes) [PDF]

open access: yes, 1984
P(論文)Gill-arch structures of 34 species belonging to five families of the suborder Notothenioidei were studied in detail. Remarkable differences among notothenioid gill arches were recognized mainly in the degree of ossification of basibranchials, the ...
Iwami, Tetsuo, Abe, Tokiharu
core   +1 more source

Vertical and temporal niche partitioning in Amazonian butterflies: implications for the evolution of thermal tolerance

open access: yesOikos, Volume 2025, Issue 12, December 2025.
Closely related species living in sympatry are often partitioned into divergent ecological niches. Such specialization can be enabled by the evolution of divergent traits enhancing adaptation to different niches. In this study, we investigate the partitioning of closely related butterfly species into different forest strata and daily activity time and ...
Titouan Bouinier   +2 more
wiley   +1 more source

The Gut Microbial Community of Antarctic Fish Detected by 16S rRNA Gene Sequence Analysis

open access: yesBioMed Research International, Volume 2016, Issue 1, 2016., 2016
Intestinal bacterial communities are highly relevant to the digestion, nutrition, growth, reproduction, and a range of fitness in fish, but little is known about the gut microbial community in Antarctic fish. In this study, the composition of intestinal microbial community in four species of Antarctic fish was detected based on 16S rRNA gene sequencing.
Wei Song   +8 more
wiley   +1 more source

In Situ Gene Mapping of Two Genes Supports Independent Evolution of Sex Chromosomes in Cold‐Adapted Antarctic Fish

open access: yesBioMed Research International, Volume 2013, Issue 1, 2013., 2013
Two genes, that is, 5S ribosomal sequences and antifreeze glycoprotein (AFGP) genes, were mapped onto chromosomes of eight Antarctic notothenioid fish possessing a X1X1X2X2/X1X2Y sex chromosome system, namely, Chionodraco hamatus and Pagetopsis macropterus (family Channichthyidae), Trematomus hansoni, T. newnesi, T. nicolai, T.
Laura Ghigliotti   +5 more
wiley   +1 more source

Muscle growth in Antarctic and Subantarctic notothenioid fishes

open access: yesScientia Marina, 2005
The suborder Notothenioidei comprises 122 species divided into 8 families, with members of 6 of the families living outside Antarctic waters. The Antarctic species underwent an extensive radiation from a small demersal ancestor to occupy different ...
Daniel Alfredo Fernández   +2 more
doaj   +1 more source

Climate Change Impacts on Antarctic Fish Diversity: A Circumpolar Perspective From eDNA Metabarcoding Assessment

open access: yesDiversity and Distributions, Volume 31, Issue 7, July 2025.
ABSTRACT Aim Recent climate‐driven changes in the Antarctic marine environment, marked by regional differences between West and East Antarctica, may alter ecosystem dynamics. As key components of the food web, fish might reflect these changes. This study examines fish biodiversity patterns across four typical Antarctic seas by integrating eDNA analysis
Hai Li   +9 more
wiley   +1 more source

Adaptive Radiation in Antarctic Notothenioids [PDF]

open access: yes, 2018
Antarctic notothenioids have undergone adaptive radiation in order to survive. Some challenges notothenioids face includes maintaining proper organ function, increased blood viscosity, maintaining appropriate protein levels, and conserving energy.
Alsip, Laura
core   +2 more sources

Estudio sobre la reproducción de Notothenioidei (Pisces: perciformes) del océano austral [PDF]

open access: yes, 2003
Consultable des del TDXTítol obtingut de la portada digitalitzadaEl continente Antártico, la región más meridional de la tierra, despliega una serie de características únicas y distintivas.
Van der Molen, Silvina
core  

Home - About - Disclaimer - Privacy