Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon

We describe the most important reproductive aspects of the flag cichlid Mesonauta insignis in the floodplain (várzea) lakes of the Central Brazilian Amazon. Between September 2005 and August 2006, fish were collected monthly from mattresses of aquatic macrophytes. Biometric measurements as well as m...

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Autores principales:	TCG Silva, D Lima, AC Prado-Valladares, MAP Ferreira, RM Rocha, HL Queiroz
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Biology (General) QH301-705.5 Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/7c5913eb7b2f4545bad597328dcb2e3a
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spelling	oai:doaj.org-article:7c5913eb7b2f4545bad597328dcb2e3a2021-11-18T09:17:05ZReproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon1864-77821864-779010.3354/ab00631https://doaj.org/article/7c5913eb7b2f4545bad597328dcb2e3a2015-06-01T00:00:00Zhttps://www.int-res.com/abstracts/ab/v24/n1/p35-40/https://doaj.org/toc/1864-7782https://doaj.org/toc/1864-7790We describe the most important reproductive aspects of the flag cichlid Mesonauta insignis in the floodplain (várzea) lakes of the Central Brazilian Amazon. Between September 2005 and August 2006, fish were collected monthly from mattresses of aquatic macrophytes. Biometric measurements as well as macroscopic and microscopic analyses of the gonads were performed. Standard body lengths ranged from 2.4 to 9.3 cm, and weight-length relationships were indicative of isometric growth patterns. Reproduction events were detected in all months, but the gonadosomatic index indicated a reproductive season from October to February (during low and rising water periods), reaching a reproductive peak in February. Average fecundity was 1184 ± 40.82 (mean ± SD) mature oocytes. M. insignis exhibits an asynchronous oocytal development, characteristic of multiple spawnings. Morphological and histological analyses indicated 5 gonadal maturation stages for females. Average standard length at first sexual maturation was 5.18 cm for females and 5.5 cm for males. M. insignis shows late sexual maturation. Taken together, these aspects suggest that a life history strategy of ‘equilibrium’ predominates in the species; consequently, M. insignis can be considered vulnerable to high extraction rates, and can only be exploited sustainably if adequate precautionary management procedures are adopted. Some management measures are suggested for the exploitation of this species in the Central Amazon.TCG SilvaD LimaAC Prado-ValladaresMAP FerreiraRM RochaHL QueirozInter-ResearcharticleBiology (General)QH301-705.5MicrobiologyQR1-502ENAquatic Biology, Vol 24, Iss 1, Pp 35-40 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5 Microbiology QR1-502
spellingShingle	Biology (General) QH301-705.5 Microbiology QR1-502 TCG Silva D Lima AC Prado-Valladares MAP Ferreira RM Rocha HL Queiroz Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
description	We describe the most important reproductive aspects of the flag cichlid Mesonauta insignis in the floodplain (várzea) lakes of the Central Brazilian Amazon. Between September 2005 and August 2006, fish were collected monthly from mattresses of aquatic macrophytes. Biometric measurements as well as macroscopic and microscopic analyses of the gonads were performed. Standard body lengths ranged from 2.4 to 9.3 cm, and weight-length relationships were indicative of isometric growth patterns. Reproduction events were detected in all months, but the gonadosomatic index indicated a reproductive season from October to February (during low and rising water periods), reaching a reproductive peak in February. Average fecundity was 1184 ± 40.82 (mean ± SD) mature oocytes. M. insignis exhibits an asynchronous oocytal development, characteristic of multiple spawnings. Morphological and histological analyses indicated 5 gonadal maturation stages for females. Average standard length at first sexual maturation was 5.18 cm for females and 5.5 cm for males. M. insignis shows late sexual maturation. Taken together, these aspects suggest that a life history strategy of ‘equilibrium’ predominates in the species; consequently, M. insignis can be considered vulnerable to high extraction rates, and can only be exploited sustainably if adequate precautionary management procedures are adopted. Some management measures are suggested for the exploitation of this species in the Central Amazon.
format	article
author	TCG Silva D Lima AC Prado-Valladares MAP Ferreira RM Rocha HL Queiroz
author_facet	TCG Silva D Lima AC Prado-Valladares MAP Ferreira RM Rocha HL Queiroz
author_sort	TCG Silva
title	Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
title_short	Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
title_full	Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
title_fullStr	Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
title_full_unstemmed	Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon
title_sort	reproductive aspects of the flag cichlid mesonauta insignis in várzea lakes of the central brazilian amazon
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/7c5913eb7b2f4545bad597328dcb2e3a
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Reproductive aspects of the flag cichlid Mesonauta insignis in várzea lakes of the Central Brazilian Amazon

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