Results 61 to 70 of about 4,547 (220)

Historical Records of Tumours in New Zealand Marine Fishes

open access: yesNew Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 2, June 2026.
Tumours were first described in New Zealand marine fishes in 1982 but those early records have been difficult to access and subsequently few tumours have been collected and little has been published. This review updates records of identified tumours from teleosts in the New Zealand marine environment and may encourage more work to identify background ...
John Brian Jones
wiley   +1 more source

The Reactions of the Melanophores of the Horned Toad [PDF]

open access: yesProceedings of the National Academy of Sciences, 1917
observing the initial and the later phases of phosphorescence there would be an actual discontinuity between the processes referred to above and those in the curves for the phosphorescence of slow decay. Summary.-(1) The regions of selective excitation (the bands of excitation) for the Lenard and Klatt sulphides are shown to coincide in position and ...
openaire   +2 more sources

Photoperiod modulates male sexual maturation in the Emperor tetra (Nematobrycon palmeri), a strictly tropical ornamental fish

open access: yesJournal of the World Aquaculture Society, Volume 57, Issue 3, June 2026.
Abstract Photoperiod manipulation is widely used to regulate reproduction in temperate fish species, but little is known about its effects in strictly tropical species. This study evaluated whether the Emperor tetra (Nematobrycon palmeri), a tropical ornamental fish, can modulate sexual maturation in response to artificial light regimes.
Lury N. García   +2 more
wiley   +1 more source

Melanophores on the dorsal head of a larval zebrafish.

open access: yes, 2014
A) before treatement with epinephrine. B) post treatment. The same fish is shown in A and B. B) shows the region in which melanophores were counted. Scale bars are 200 µm.
Sara C. Edsall (525254)   +1 more
core   +1 more source

Volumetric tracking of migratory melanophores during zebrafish development by optoacoustic microscopy.

open access: yes, 2015
Unveiling mechanisms driving specification, recruitment and regeneration of melanophores is key in understanding melanin-related disorders. This study reports on the applicability of a hybrid focus optoacoustic microscope (HFOAM) for volumetric tracking ...
Kneipp, Moritz;Estrada, Héctor;Lauri, Antonella;Turner, Jake;Ntziachristos, Vasilis;Westmeyer, Gil G;Razansky, Daniel
core   +2 more sources

Kinesin‐Induced Buckling Reveals the Limits of Microtubule Self‐Repair

open access: yesAdvanced Science, Volume 13, Issue 26, 8 May 2026.
This study shows that kinesin‐driven buckling induces extensive microtubule lattice damage that often exceeds intrinsic self‐repair and leads to filament failure. While curvature, motor motility, and force individually cause limited damage, their combination overwhelms repair.
Shweta Nandakumar   +9 more
wiley   +1 more source

melanophores

open access: yes, 2001
1 Melatonin (5-methoxy N-acetyltryptamine) and serotonin (5-HT) exert rapid, but opposite effects on pigment granule distribution in Xenopus laevis melanophores.
Muy‐Teck Teh   +3 more
core   +1 more source

Long-distance communication by specialized cellular projections during pigment pattern development and evolution

open access: yeseLife, 2015
Changes in gene activity are essential for evolutionary diversification. Yet, elucidating the cellular behaviors that underlie modifications to adult form remains a profound challenge. We use neural crest-derived adult pigmentation of zebrafish and pearl
Dae Seok Eom   +4 more
doaj   +1 more source

Genetic Divergence in the Absence of Strong Ecological Differences Between Coexisting White and Common Atlantic Marine Stickleback

open access: yesEcology and Evolution, Volume 16, Issue 5, May 2026.
We examined whether the “white” threespine stickleback of Nova Scotia represents a nascent species distinct from sympatric common marine sticklebacks. Genomic analyses revealed that whites form a unique genetic cluster with low but widespread divergence across the genome despite evidence of gene flow, while morphometric and isotopic data indicated ...
Kieran Samuk   +2 more
wiley   +1 more source

Melanopsin: An opsin in melanophores, brain, and eye [PDF]

open access: yesProceedings of the National Academy of Sciences, 1998
We have identified an opsin, melanopsin, in photosensitive dermal melanophores of Xenopus laevis . Its deduced amino acid sequence shares greatest homology with cephalopod opsins. The predicted secondary structure of melanopsin indicates the presence of a long cytoplasmic tail with multiple putative phosphorylation ...
Provencio, I.   +4 more
openaire   +3 more sources

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