New findings on the early life stages of five codlet species (Teleostei, Gadiformes, Bregmacerotidae) from the northwestern Pacific, including a putative undescribed Bregmaceros lineage [PDF]
ZooKeysCodlets (Bregmacerotidae) play a major role in marine ecology, acting as trophic links between primary consumers and higher predators in mesopelagic communities; however, little information has been accumulated on their early life stages.
Seo-Yeon Koo +4 more
doaj +4 more sources
Eye Darkening Under Dehydration Stress in the Neotropical Frog Boana punctata (Schneider, 1799). [PDF]
J Exp Zool A Ecol Integr PhysiolDehydration induces a strong and partially reversible increase in iris pigmentation in the Neotropical frog Boana punctata. The tight relationship between iris darkening and hydration state identifies ocular pigmentation as a simple, non‐invasive physiological biomarker with broad potential for assessing hydric stress in amphibian populations ...
Reques R +5 more
europepmc +2 more sources
Isolated in the highlands, found in the museum: A new species of Characidium (Crenuchidae) from a Bolivian National Park, with a CT scan revealing features. [PDF]
J Fish BiolAbstract A new species of Characidium is described from a small, isolated river in the highland areas of Noel Kempff Mercado National Park, Bolivia. The new taxon can be diagnosed by the presence of a relatively broad and conspicuous dark midlateral stripe extending from the tip of snout to the base of the caudal fin, markedly darker than the vertical ...
Oliveira-Silva L +3 more
europepmc +2 more sources
Range extension and first records of Coryphaenoides striaturus Barnard, 1925 and Coryphaenoides subserrulatus Makushok, 1976 (Macrouridae: Gadiformes) in Brazilian waters, Southwest Atlantic, using integrative taxonomy. [PDF]
J Fish BiolAbstract Coryphaenoides Gunnerus, 1765 comprises 66 valid species of deep‐sea fishes commonly known as grenadiers, with 6 previously reported from Brazilian waters. Here, we make the first records for Coryphaenoides striaturus and Coryphaenoides subserrulatus on the Brazilian continental slope. Both species are distributed in the subtropical regions of
de Melo MRS +4 more
europepmc +2 more sources
A Recessive oca2 Mutation Underlies Albinism in Xiphophorus Fish. [PDF]
Pigment Cell Melanoma ResGenetic mapping of albino Xiphophorus hellerii showed that albinism is associated with a recessive oca2 variant. This variant leads to early termination of the Oca2 protein. This study identifies a novel model system to investigate conserved mechanisms of pigmentation biology.
Xing Y +5 more
europepmc +2 more sources
A new species of inseminating catfish of the genus Tympanopleura (Siluriformes: Auchenipteridae) from the Ituxi River, Amazon River basin, northern Brazil, revealed by integrative taxonomy. [PDF]
J Fish BiolAbstract A new species of the genus Tympanopleura is described from the Iquiri River, a tributary of the Ituxi River, a right‐bank tributary to the Purus River, Amazon River, northern Brazil. The new species is distinguished from all its congeners by a combination of features, such as the presence of an intensely pigmented square‐shaped blotch on the ...
Ribeiro FRV +4 more
europepmc +2 more sources
Short-term effects of α-melanocyte-stimulating hormone in three distinct melanin-pigmented cell types of Anura [PDF]
Anais da Academia Brasileira de Ciências, 2022 Ectothermic animals present melanin-containing cells in their integument and viscera. Besides cutaneous melanophores, amphibians have melanomacrophages in the hepatic parenchyma and melanocytes in the viscera, which are also present in their testicular ...
RODRIGO ZIERI +2 more
doaj +1 more source
Cells, 2021 Zebrafish has emerged as a powerful model in studies dealing with pigment development and pathobiology of pigment diseases. Due to its conserved pigment pattern with established genetic background, the zebrafish is used for screening of active compounds ...
Natalia Kasica +2 more
doaj +1 more source
Zebrafish Larval Melanophores Respond to Electromagnetic Fields Exposure
Applied Sciences, 2023 Groups of zebrafish (Danio rerio) embryos receive radiations of different frequencies and intensities by means of new prototype devices. They are exposed to static (B0, 0 Hz), extremely low-frequency (ELF, 0.2 Hz), low-frequency (LF, 270 kHz), very-high ...
Vincenzo Nassisi +6 more
doaj +1 more source
A histological analysis of coloration in the Peruvian mimic poison frog (Ranitomeya imitator) [PDF]
PeerJ, 2023 Aposematism continues to be a phenomenon of central interest in evolutionary biology. The life history of the mimic poison frog, Ranitomeya imitator, relies heavily on aposematism.
Mallory de Araujo Miles +3 more
doaj +2 more sources