Please use this identifier to cite or link to this item:
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Sexual Dimorphism in Pelvic Fin Length of Two Endangered Freshwater Atherinopsid Species with High Aquaculture Potential
Author(s): Martínez-Chávez, C Cristian
Alarcón-Silva, Eugenia M
Martínez-Palacios, Carlos A
Navarrete-Ramírez, Pamela
Raggi, Luciana
Corona-Herrera, Guillermo A
López García, Jesús
Strüssmann, Carlos A
Ross, Lindsay G
Contact Email:
Issue Date: 31-Jul-2018
Citation: Martínez-Chávez CC, Alarcón-Silva EM, Martínez-Palacios CA, Navarrete-Ramírez P, Raggi L, Corona-Herrera GA, López García J, Strüssmann CA & Ross LG (2018) Sexual Dimorphism in Pelvic Fin Length of Two Endangered Freshwater Atherinopsid Species with High Aquaculture Potential. North American Journal of Aquaculture, 80 (3), pp. 310-314.
Abstract: The endemic Mexican silversides of Lake Pátzcuaro (Pike Silverside Chirostoma estor) and Lake Chapala (Blacknose Silverside C. promelas) are endangered fish species of great socioeconomic importance in the region. Since the last decade, much progress has been made to close the life cycle in captivity and in promoting the aquaculture of these species. The lack of standardized husbandry and broodstock management practices, including sex discrimination, is a bottleneck to the commercial culture of these species. Recent observations have suggested a possible difference between the length of the pelvic fins of males and females. To explore these observations, biometric measurements were taken from Pike Silverside and Blacknose Silverside broodstocks, comprising body weight, SL, distance from the base of the pelvic fin to the genital pore (BPF), and distance from the tip of pelvic fin to the genital pore (TPF). The latter measurements were used to calculate the TPF/BPF ratio. Sex‐specific differences were found in BPF, TPF, and TPF/BPF for both species, clearly indicating a sexually dimorphic characteristic not previously reported in any atherinopsid. This study reveals for the first time the presence of a noticeable sexually dimorphic and externally evident trait in two closely related atherinopsid species, which provides a simple morphometric technique for sex discrimination that minimizes manipulation and thus avoids overstressing or killing the fish.
DOI Link: 10.1002/naaq.10036
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.

Files in This Item:
File Description SizeFormat 
Martinez-Chavez_et_al-2018-North_American_Journal_of_Aquaculture.pdfFulltext - Published Version172.85 kBAdobe PDFUnder Permanent Embargo    Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.