Stimulatory effect of thyroid hormones improves larval development and reproductive performance in alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus)

2013 ◽  
Vol 46 (9) ◽  
pp. 2079-2091 ◽  
Author(s):  
Sergio Castillo ◽  
Kent Bollfrass ◽  
Roberto Mendoza ◽  
Quenton Fontenot ◽  
Juan Pablo Lazo ◽  
...  
Keyword(s):  
Thyroid Hormones ◽  
Larval Development ◽  
Reproductive Performance ◽  
Spotted Gar ◽  
Alligator Gar ◽  
Lepisosteus Oculatus ◽  
Atractosteus Spatula

Cloning of the growth hormone cDNA of alligator gar Atractosteus spatula and its expression through larval development

2005 ◽  
Vol 140 (4) ◽  
pp. 423-429 ◽  
Author(s):  
Agnès Revol ◽  
Maria de Lourdes Garza Rodríguez ◽  
Víctor Hernández Montenegro ◽  
Carlos Aguilera ◽  
Hugo Barrera Saldaña ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Larval Development ◽  
Alligator Gar ◽  
Atractosteus Spatula

Weaning of alligator gar (Atractosteus spatula) larvae to artificial diets

2008 ◽  
Vol 14 (3) ◽  
pp. 223-231 ◽  
Author(s):  
R. MENDOZA ◽  
C. AGUILERA ◽  
L. CARREÓN ◽  
J. MONTEMAYOR ◽  
M. GONZÁLEZ
Keyword(s):  
Artificial Diets ◽  
Alligator Gar ◽  
Atractosteus Spatula

Air-breathing during activity in the fishes amia calva and lepisosteus oculatus

1998 ◽  
Vol 201 (7) ◽  
pp. 943-948 ◽  
Author(s):  
C G Farmer ◽  
D C Jackson
Keyword(s):  
Oxygen Consumption ◽  
Fish Species ◽  
Aquatic Habitats ◽  
Air Breathing ◽  
Spotted Gar ◽  
Water Oxygen ◽  
Rate Of Oxygen Consumption ◽  
Amia Calva ◽  
Lepisosteus Oculatus ◽  
Air Hole

Many osteichthyan fishes obtain oxygen from both air, using a lung, and water, using gills. Although it is commonly thought that fishes air-breathe to survive hypoxic aquatic habitats, other reasons may be more important in many species. This study was undertaken to determine the significance of air-breathing in two fish species while exercising in oxygen-rich water. Oxygen consumption from air and water was measured during mild activity in bowfin (Amia calva) and spotted gar (Lepisosteus oculatus) by sealing a fish in an acrylic flume that contained an air-hole. At 19-23 degreesC, the rate of oxygen consumption from air in both species was modest at rest. During low-level exercise, more than 50 % of the oxygen consumed by both species was from the air (53.0+/-22.9 % L. oculatus; 66.4+/-8.3 % A. calva). <P>

scholarly journals Feeding kinematics and morphology of the alligator gar ( Atractosteus spatula , Lacépède, 1803)

2019 ◽  
Vol 280 (10) ◽  
pp. 1548-1570
Author(s):  
Justin B. Lemberg ◽  
Neil H. Shubin ◽  
Mark W. Westneat
Keyword(s):  
Alligator Gar ◽  
Feeding Kinematics ◽  
Atractosteus Spatula

scholarly journals The Molecular Evolution of Circadian Clock Genes in Spotted Gar (Lepisosteus oculatus)

Genes ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 622 ◽  
Author(s):  
Yi Sun ◽  
Chao Liu ◽  
Moli Huang ◽  
Jian Huang ◽  
Changhong Liu ◽  
...  
Keyword(s):  
Circadian Clock ◽  
Teleost Fish ◽  
Clock Gene ◽  
Genome Duplication ◽  
Clock Genes ◽  
Gene Families ◽  
Regulatory Mechanisms ◽  
Spotted Gar ◽  
Circadian Clock Genes ◽  
Lepisosteus Oculatus

Circadian rhythms are biological rhythms with a period of approximately 24 h. While canonical circadian clock genes and their regulatory mechanisms appear highly conserved, the evolution of clock gene families is still unclear due to several rounds of whole genome duplication in vertebrates. The spotted gar (Lepisosteus oculatus), as a non-teleost ray-finned fish, represents a fish lineage that diverged before the teleost genome duplication (TGD), providing an outgroup for exploring the evolutionary mechanisms of circadian clocks after whole-genome duplication. In this study, we interrogated the spotted gar draft genome sequences and found that spotted gar contains 26 circadian clock genes from 11 families. Phylogenetic analysis showed that 9 of these 11 spotted gar circadian clock gene families have the same number of genes as humans, while the members of the nfil3 and cry families are different between spotted gar and humans. Using phylogenetic and syntenic analyses, we found that nfil3-1 is conserved in vertebrates, while nfil3-2 and nfil3-3 are maintained in spotted gar, teleost fish, amphibians, and reptiles, but not in mammals. Following the two-round vertebrate genome duplication (VGD), spotted gar retained cry1a, cry1b, and cry2, and cry3 is retained in spotted gar, teleost fish, turtles, and birds, but not in mammals. We hypothesize that duplication of core clock genes, such as (nfil3 and cry), likely facilitated diversification of circadian regulatory mechanisms in teleost fish. We also found that the transcription factor binding element (Ahr::Arnt) is retained only in one of the per1 or per2 duplicated paralogs derived from the TGD in the teleost fish, implicating possible subfuctionalization cases. Together, these findings help decipher the repertoires of the spotted gar’s circadian system and shed light on how the vertebrate circadian clock systems have evolved.

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