Plasma energetic substrates and hepatic enzymes in the four-eyed fish <i>Anableps anableps</i> (Teleostei: Cyprinodontiformes) during the dry and rainy seasons in the Amazonian Island of Maracá, extreme north of Brazil

Guedes, Maria Eduarda Gomes; Correia, Tiago Gabriel

doi:10.1590/1982-0224-2021-0078

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Original article • Neotrop. ichthyol. 19 (4) • 2021 • https://doi.org/10.1590/1982-0224-2021-0078 copy

Plasma energetic substrates and hepatic enzymes in the four-eyed fish Anableps anableps (Teleostei: Cyprinodontiformes) during the dry and rainy seasons in the Amazonian Island of Maracá, extreme north of Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Anableps anableps is a viviparous teleost typical from Amazon Delta estuaries. It is representative of this biome in Maracá, which offers a potential for biomonitoring. The aim of this study is to apply different biomarkers to males and females of this species and verify possible seasonal influences on their physiology. To collect fish, three expeditions were carried out from the rainy season of April 2018 to the rainy season of February 2019. Biometric parameters and gonadosomatic (GSI), hepatosomatic (HSI), and viscerosomatic (VSI) indexes were calculated, and blood samples were taken to measure triglycerides, total proteins, glucose, and activity of the enzymes aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP). The GSI of males is higher in the rainy season and of females in the dry season. This is probably related to the embryogenesis process. Males show an increase in biomass during the dry season, a metabolic homogeneity, and females show an increase in plasma glucose, triglycerides, and ALT activity. The tested biomarkers are potential for biomonitoring, preliminarily suggesting that there is a seasonal asynchronism between males and females of A. anableps as for the allocation of energy resources at different times of their life cycle.

Keywords:
Amapá; Delta; Fish transaminases; Tralhoto; Viviparity

	Rainy season (April 2018)		Dry season (September 2018)		Rainy season (February 2019)
	Female	Male	Female	Male	Female	Male
Total length (cm)	36.20 ± 2.1 a	-	29.14 ± 2.9 b	26.00 ± 4.5 b	31.07 ± 3.6 ab	26.60 ± 1.3 b
Weight (g)	383.06 ± 90.7 a	-	198.00 ± 52.5 bc	235.00 ± 155.0 ac	196.42 ± 54.2 bc	118.32 ± 37.7 b
GSI (%) Number of embryos	2.87 ± 0.7 b 9.00 ± 2.5	-	14.66 ± 2.0 a 20.66 ± 5.7	0.41 ± 0.1 a -	4.05 ± 0.8 b 9.60 ± 5.0	2.97 ± 0.7 b -
HSI (%)	2.02 ± 0.2	-	1.42 ± 0.8	1.68 ± 0.7	1.45 ± 0.3	1.16 ± 0.3
VSI (%)	3.99 ± 1.0 a	-	10.63 ± 3.8 b	5.93 ± 2.5	7.08 ± 1.7 ab	6.21 ± 2.1
K (100 x g cm-3)	1.21 ± 0.2 a	-	0.75 ± 0.1 b	1.00 ± 0.5	1.05 ± 0.0 a	0.62 ± 0.1

	Dry season (September 2018)		Rainy season (February 2019)
	Female	male	Female	male
Total proteins (g dL-1)	2.51 ± 0.5	1.99 ± 0.1	2.24 ± 0.4	2.35 ± 0.4
Glucose (mg dL-1)	228.71 ± 39.0 a	82.61 ± 33.6 b	95.58 ± 37.2 b	77.30 ± 29.5 b
Triglycerides (mg dL-1)	277.26 ± 60.4 a	125.91 ± 36.4 bc	196.49 ± 34.5 b	103.48 ± 30.0 c
AST (U L-1)	136.19 ± 30.0	93.56 ± 28.1	106.79 ± 23.4	-
ALT (U L-1)	27.35 ± 13.9 a	18.33 ± 5.7 ab	12.88 ± 5.7 b	15.42 ± 4.5 ab
ALP (U L-1)	33.30 ± 5.8	38.5 ± 6.3	51.79 ± 22.2	23.8 ± 6.5

Anableps anableps (females)
Expedition	Correlation of variables	Pearson (r)	P	n
Rainy season (April 2018)	Total length and body weight	0.452	0.222	9
	GSI and K	0.857	0.143	9
	GSI and VSI	-0.645	0.355	9
Dry season (September 2018)	Triglycerides and glucose	0.125	0.875	7
	Triglycerides and ALT	0.386	0.748	7
	Triglycerides and VSI	0.023	0.976	7
	Triglycerides and GSI	0.637	0.363	7
	Glucose and ALT	-0.348	0.774	7
	GSI and K	0.560	0.440	7
	GSI and VSI	0.777	0.223	5
Rainy season (April 2019)	Total length and body weight	0.985	<0.05	7
	GSI and K	0.704	0.206	7
	GSI and VSI	0.295	0.705	7
	IVS and K	-0.144	0.759	7
Anableps anableps (males)
	Correlation of variables	Pearson (r)	P	n
Dry season (September 2018)	Total length and body weight	0.367	0.633	5
	GSI and K	-0.519	0.653	5
	GSI and VSI	-0.287	0.815	5
	IVS and K	-0.670	0.532	5
Rainy season (April 2019)	Total length and body weight	0.89	<0.05	5
	GSI and K	-0.827	0.08	5
	GSI and VSI	0.01	0.982	5
	IVS and K	-0.166	0.790	5

Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Universidade Estadual de Maringá., Av. Colombo, 5790, 87020-900, Phone number: +55 44-3011-4632 - Maringá - PR - Brazil
E-mail: neoichth@nupelia.uem.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] Edited by

Juan Miguel Mancera