scholarly journals Neural origins of basal diencephalon in teleost fishes: Radial versus tangential migration

2020 ◽  
Vol 281 (9) ◽  
pp. 1133-1141 ◽  
Author(s):  
Mario F. Wullimann
Keyword(s):  
Teleost Fishes ◽  
Tangential Migration

Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

2020 ◽  
Vol 33 ◽  
pp. 15
Author(s):  
Roi Martínez-Escauriaza ◽  
Claudio Vieira ◽  
Lídia Gouveia ◽  
Nuno Gouveia ◽  
Margarida Hermida
Keyword(s):  
Fish Species ◽  
Young Men ◽  
Coastal Areas ◽  
Teleost Fishes ◽  
The North ◽  
Southeast Coast ◽  
Madeira Archipelago ◽  
First Time

Data obtained from licenses of spearfishers and surveys conducted in 2004 and 2017 allowed for the analysis, for the first time, of the practice of spearfishing in the Madeira archipelago. Only a small percentage of the population practices spearfishing, mostly local young men. Most of them practice the activity with a partner throughout most of the year and along most of the island's coastal areas, although preferentially along the North and Southeast coast. Results show how, in recent years, despite the population of spearfishers decreasing, the abundance in the annual catch potentially increased, probably due to the higher investment of time in this activity. It has been observed that many fishers complement their catches with manual collecting of invertebrates. Overall, 40 teleost fishes and also 4 crustaceans and 8 molluscs were identified. The most frequently captured fish species were parrotfish and white seabream, while limpets were the most collected invertebrates in both selected periods.

Identification and functional analysis of NOD2 and its two splicing variants associated with a novel pattern of signal regulation in teleost fishes

2021 ◽  
Vol 120 ◽  
pp. 104049
Author(s):  
Yunkun Li ◽  
La Jin ◽  
Puzhen Xia ◽  
Weikai Sui ◽  
Anqi Huang ◽  
...  
Keyword(s):  
Functional Analysis ◽  
Teleost Fishes ◽  
Splicing Variants ◽  
Signal Regulation

scholarly journals Gene regulatory networks controlling differentiation, survival, and diversification of hypothalamic Lhx6-expressing GABAergic neurons

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Dong Won Kim ◽  
Kai Liu ◽  
Zoe Qianyi Wang ◽  
Yi Stephanie Zhang ◽  
Abhijith Bathini ◽  
...  
Keyword(s):  
Cortical Neurons ◽  
Regulatory Networks ◽  
Molecular Mechanisms ◽  
Gabaergic Neurons ◽  
Zona Incerta ◽  
Long Distance ◽  
Hypothalamic Neurons ◽  
Cortical Interneuron ◽  
Tangential Migration ◽  
Innate Behaviors

AbstractGABAergic neurons of the hypothalamus regulate many innate behaviors, but little is known about the mechanisms that control their development. We previously identified hypothalamic neurons that express the LIM homeodomain transcription factor Lhx6, a master regulator of cortical interneuron development, as sleep-promoting. In contrast to telencephalic interneurons, hypothalamic Lhx6 neurons do not undergo long-distance tangential migration and do not express cortical interneuronal markers such as Pvalb. Here, we show that Lhx6 is necessary for the survival of hypothalamic neurons. Dlx1/2, Nkx2-2, and Nkx2-1 are each required for specification of spatially distinct subsets of hypothalamic Lhx6 neurons, and that Nkx2-2+/Lhx6+ neurons of the zona incerta are responsive to sleep pressure. We further identify multiple neuropeptides that are enriched in spatially segregated subsets of hypothalamic Lhx6 neurons, and that are distinct from those seen in cortical neurons. These findings identify common and divergent molecular mechanisms by which Lhx6 controls the development of GABAergic neurons in the hypothalamus.

scholarly journals Elevated carbon dioxide alters the plasma composition and behaviour of a shark

2014 ◽  
Vol 10 (9) ◽  
pp. 20140538 ◽  
Author(s):  
Leon Green ◽  
Fredrik Jutfelt
Keyword(s):  
Ocean Acidification ◽  
Fossil Fuels ◽  
Resting Metabolic Rate ◽  
Blood Chemistry ◽  
Teleost Fishes ◽  
Behavioural Effects ◽  
Swimming Pattern ◽  
Acclimation Period ◽  
Elevated Water ◽  
Elasmobranch Fishes

Increased carbon emissions from fossil fuels are increasing the p CO 2 of the ocean surface waters in a process called ocean acidification. Elevated water p CO 2 can induce physiological and behavioural effects in teleost fishes, although there appear to be large differences in sensitivity between species. There is currently no information available on the possible responses to future ocean acidification in elasmobranch fishes. We exposed small-spotted catsharks ( Scyliorhinus canicula ) to either control conditions or a year 2100 scenario of 990 μatm p CO 2 for four weeks. We did not detect treatment effects on growth, resting metabolic rate, aerobic scope, skin denticle ultrastructure or skin denticle morphology. However, we found that the elevated p CO 2 group buffered internal acidosis via accumulation with an associated increase in Na + , indicating that the blood chemistry remained altered despite the long acclimation period. The elevated p CO 2 group also exhibited a shift in their nocturnal swimming pattern from a pattern of many starts and stops to more continuous swimming. Although CO 2 -exposed teleost fishes can display reduced behavioural asymmetry (lateralization), the CO 2 -exposed sharks showed increased lateralization. These behavioural effects may suggest that elasmobranch neurophysiology is affected by CO 2 , as in some teleosts, or that the sharks detect CO 2 as a constant stressor, which leads to altered behaviour. The potential direct effects of ocean acidification should henceforth be considered when assessing future anthropogenic effects on sharks.

Myosin isoforms in red and white muscles of some marine teleost fishes

1990 ◽  
Vol 11 (6) ◽  
pp. 489-495 ◽  
Author(s):  
I. Martinez ◽  
R. Ofstad ◽  
R. L. Olsen
Keyword(s):  
Myosin Isoforms ◽  
Teleost Fishes ◽  
Marine Teleost ◽  
Red And White Muscles

scholarly journals Meningeal defects alter the tangential migration of cortical interneurons in Foxc1hith/hith mice

2012 ◽  
Vol 7 (1) ◽  
pp. 2 ◽  
Author(s):  
Konstantinos Zarbalis ◽  
Youngshik Choe ◽  
Julie A Siegenthaler ◽  
Lori A Orosco ◽  
Samuel J Pleasure
Keyword(s):  
Tangential Migration ◽  
Cortical Interneurons
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