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

2013; Wiley; Volume: 46; Issue: 9 Linguagem: Inglês

10.1111/are.12363

1365-2109

Sergio Castillo, Kent Bollfrass, Roberto Mendoza, Quenton Fontenot, Juan Pablo Lazo, Carlos Aguilera, Allyse Ferrara,

Fish Ecology and Management Studies

Aquaculture ResearchVolume 46, Issue 9 p. 2079-2091 Original Article Stimulatory effect of thyroid hormones improves larval development and reproductive performance in alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus) Sergio Castillo, Sergio Castillo Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, MéxicoSearch for more papers by this authorKent Bollfrass, Kent Bollfrass Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this authorRoberto Mendoza, Corresponding Author Roberto Mendoza Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México Correspondence R Mendoza, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Avenida Universidad s/n, Cd. Universitaria, 66450, San Nicolás de los Garza, Nuevo León, México. E-mail: roberto.mendoza@yahoo.comSearch for more papers by this authorQuenton Fontenot, Quenton Fontenot Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this authorJuan Pablo Lazo, Juan Pablo Lazo Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, MéxicoSearch for more papers by this authorCarlos Aguilera, Carlos Aguilera Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, MéxicoSearch for more papers by this authorAllyse Ferrara, Allyse Ferrara Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this author Sergio Castillo, Sergio Castillo Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, MéxicoSearch for more papers by this authorKent Bollfrass, Kent Bollfrass Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this authorRoberto Mendoza, Corresponding Author Roberto Mendoza Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, México Correspondence R Mendoza, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Avenida Universidad s/n, Cd. Universitaria, 66450, San Nicolás de los Garza, Nuevo León, México. E-mail: roberto.mendoza@yahoo.comSearch for more papers by this authorQuenton Fontenot, Quenton Fontenot Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this authorJuan Pablo Lazo, Juan Pablo Lazo Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, MéxicoSearch for more papers by this authorCarlos Aguilera, Carlos Aguilera Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, MéxicoSearch for more papers by this authorAllyse Ferrara, Allyse Ferrara Department of Biological Sciences, Nicholls State University, Thibodaux, LA, USASearch for more papers by this author First published: 24 December 2013 https://doi.org/10.1111/are.12363Citations: 11Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Development of alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus) larvae was evaluated after exposure of embryos to thyroid hormones (TH) by two different methods of administration. For the first method, alligator gar embryos were placed in a water bath with triiodothyronine (T3; 1 ppm for 2 h), and control treatment embryos were placed in a water bath without T3. For the second method, spotted gar adult males and females were injected with different TH during induced spawning: a group was injected with T3 [20 mg kg−1 body weight (BW)], a second group with thyroxine (T4; 20 mg kg−1 BW), a third group with thyroid-stimulating hormone (TSH; 4 IU kg−1BW) and a control group with dimethyl sulfoxide. Both methods resulted in increases in the concentrations of T3 and T4 in embryos of both species. An increase in the alkaline enzymatic activity of TH-treated larvae was observed as well as an increase in the RNA:DNA, RNA:Dry weight and DNA:Dry weight ratios at hatching. Some positive effects of TH application were: a significant increase in the hatching rate of spotted gar larvae from TH-injected parents and a higher percentage of successful spawns. Evenness of larval sizes and a higher survival rate were observed in alligator gar larvae. Snout development was accelerated by TH treatment in both species. Citing Literature Volume46, Issue9September 2015Pages 2079-2091 RelatedInformation