Acessibilidade / Reportar erro

Brasil

Neotropical Ichthyology

Español English

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Original article • Neotrop. ichthyol. 20 (1) • 2022 • https://doi.org/10.1590/1982-0224-2021-0082 copiar

Life history trait variations and population dynamics of Calophysus macropterus (Siluriformes: Pimelodidae) in two river systems of the Colombian and Peruvian Amazon

Autoría SCIMAGO INSTITUTIONS RANKINGS

RESUMEN

El bagre Calophysus macropterus está fuertemente explotado en la cuenca Amazónica. Sin embargo, su ciclo de vida está poco documentado, lo que dificulta su gestión pesquera. Para llenar este vacío, se realizaron muestreos mensuales en el alto río Putumayo alrededor de Puerto Leguízamo y en el Amazonas y los ríos bajo Marañón y Ucayali (AMU) cerca de Iquitos durante varios años (2013-2015 en AMU, 2013-2017 en Putumayo) para generar información sobre su reproducción, crecimiento y mortalidad. La reproducción, que se produce durante la estación seca y el inicio de la inundación, sólo se observó en el curso superior del río Putumayo y no en la parte muestreada del sistema de la AMU, lo que sugiere que la especie se reproduce más cerca de los Andes que otros pimelodidos. El tamaño de primera madurez sexual no difirió entre sexos o entre sistemas fluviales, oscilando entre 25-28 cm. En ambos sistemas fluviales, las hembras tuvieron un crecimiento más rápido que los machos y ambos géneros también tendieron a tener un mejor crecimiento en el AMU que en el alto Putumayo. Estimaciones de mortalidad y explotación indicaron una sobreexplotación en ambos sistemas. Se discuten las implicaciones de estos resultados para la gestión y conservación de las pesquerías.

Palabras clave:
Amazonas-Marañón-Ucayali; Bagre; Crecimiento; Putumayo; Sobrepesca

River	Sex	N	SL mean (cm)	(SL cm) range	Wt Mean (g)	Wt Range (g)	a (CI95%)	b (CI95%)	r2
Upper Putumayo	F	2706	39.0	23.0-47.5	807	128-1453	0.010 (0.009-0.011)	3.08 (3.04-3.12)	0.9014
	M	4115	31.0	22.0-45.8	395	140-1254	0.014 (0.012-0.015)	2.99 (2.95-3.02)	0.8898
	T	8064	34.0	22.0-47.5	550	128-1454	0.011 (0.010-0.011)	3.06 (3.04-3.07)	0.9578
AMU	F	1112	35.0	23.0-46.6	588	61-1312	0.009 (0.008-0.011)	3.08 (3.04-3.12)	0.9656
	M	597	28.4	22.0-45.8	304	74-1020	0.011 (0.009-0.013)	3.04 (2.98-3.09)	0.9510
	T	1710	32.7	16.5-46.6	489	61-1312	0.010 (0.009-0.010)	3.08 (3.07-3.10)	0.9623

	Sex	L∞ (cm)	K (Year-1)	t0 (Year-1)	ǿ	Score	tmax1 (Year)	tmax2 (Year)
Upper Putumayo	Females	50.4	0.40	-0.357	3.007	0.146	7.1	5.8
	Males	48.4	0.45	-0.319	3.023	0.150	6.3	5.3
	Total	50.1	0.42	-0.340	3.023	0.141	6.8	5.1
AMU	Females	49.9	0.68	- 0.21	3.229	0.394	4.2	3.9
	Males	43.9	0.80	- 0.35	3.188	0.255	3.6	3.2
	Total	50.0	0.6	- 0.29	3.176	0.171	4.7	3.9

	Upper Putumayo				AMU					A
Age (t)	F	M	Total	# F-M	F	M	Total	# F-M	# Total	Total
1	21.1	21.7	21.6	- 2.6%	27.9	26.8	26.2	4.0%	21.3%	18.6
2	30.8	31.4	31.3	- 1.9%	38.8	36.2	36.9	7.0%	19.9%	26.8
3	37.2	37.5	37.8	- 0.8%	44.2	40.5	42.8	9.4%	13.2%	32.1
4	41.6	41.5	42.0	0.3%	47.0	42.4	46.1	11.0%	9.8%	35.7
5	44.5	44.0	44.8	1.2%	48.4	43.2	47.8	12.1%	6.7%	38.1
6	46.4	45.6	46.6	1.9%	49.1	43.6	48.8	12.8%	4.7%	39.6
7	47.7	46.6	47.8	2.4%	49.5	43.8	49.3	13.1%	3.1%	40.7
8	48.6	47.3	48.6	2.9%	49.7	43.8	49.6	13.4%	2.1%	41.4

Formulae used for estimating M		Putumayo			AMU
Formulae used for estimating M		M	F	E	M	F	E
Females	Pauly (1980Pauly D. On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fish stocks. ICES J Mar Sci. 1980; 39(2):175-92. https://doi.org/10.1093/icesjms/39.2.175 https://doi.org/10.1093/icesjms/39.2.175... )	0.83	1.35	0.62	1.18	2.12	0.64
	Richter, Efanov (1976)	0.90	1.28	0.59	1.37	1.93	0.58
	Jensen (1996Jensen AL. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Can J Fish Aquat Sci. 1996; 53(4):820-22. https://doi.org/10.1139/f95-233 https://doi.org/10.1139/f95-233... ). Using K	0.64	1.54	0.71	1.09	2.21	0.67
	Jensen (1996Jensen AL. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Can J Fish Aquat Sci. 1996; 53(4):820-22. https://doi.org/10.1139/f95-233 https://doi.org/10.1139/f95-233... ). Using A₅₀	0.99	1.19	0.55	1.66	1.64	0.50
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Immature	1.06	1.12	0.51	1.92	1.38	0.42
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Mature	0.54	1.64	0.75	0.99	2.31	0.70
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Immature	1.10	1.08	0.49	1.99	1.31	0.40
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Mature	0.59	1.59	0.73	1.07	2.23	0.68
Males	Pauly (1980Pauly D. On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fish stocks. ICES J Mar Sci. 1980; 39(2):175-92. https://doi.org/10.1093/icesjms/39.2.175 https://doi.org/10.1093/icesjms/39.2.175... )	0.91	1.57	0.63	1.37	1.45	0.51
	Richter, Efanov (1976)	1.07	1.41	0.57	1.86	0.95	0.34
	Jensen (1996Jensen AL. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Can J Fish Aquat Sci. 1996; 53(4):820-22. https://doi.org/10.1139/f95-233 https://doi.org/10.1139/f95-233... ). Using K	0.72	1.76	0.71	1.28	1.53	0.54
	Jensen (1996Jensen AL. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Can J Fish Aquat Sci. 1996; 53(4):820-22. https://doi.org/10.1139/f95-233 https://doi.org/10.1139/f95-233... ). Using A₅₀	1.22	1.26	0.51	2.44	0.37	0.13
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Immature	1.07	1.41	0.57	2.11	0.70	0.25
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Mature	0.82	1.66	0.67	1.35	1.46	0.52
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Immature	1.12	1.36	0.55	2.15	0.66	0.23
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Mature	0.87	1.61	0.65	1.42	1.39	0.5
Total	Pauly (1980Pauly D. On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fish stocks. ICES J Mar Sci. 1980; 39(2):175-92. https://doi.org/10.1093/icesjms/39.2.175 https://doi.org/10.1093/icesjms/39.2.175... )	0.86	1.15	0.57	1.09	1.58	0.59
	Jensen (1996Jensen AL. Beverton and Holt life history invariants result from optimal trade-off of reproduction and survival. Can J Fish Aquat Sci. 1996; 53(4):820-22. https://doi.org/10.1139/f95-233 https://doi.org/10.1139/f95-233... ). Using K	0.67	1.34	0.67	0.96	1.71	0.64
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Immature	1.06	0.95	0.47	1.70	0.97	0.36
	Gislason et al. (2010Gislason H, Daan N, Rice JC, Pope JG. Size, growth, temperature and the natural mortality of marine fish. Fish Fish . 2010; 11(2):149-58. https://doi.org/10.1111/j.1467-2979.2009.00350.x https://doi.org/10.1111/j.1467-2979.2009... ). Mature	0.65	1.36	0.67	0.87	1.80	0.67
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Immature	1.11	0.90	0.45	1.76	0.91	0.34
	Charnov et al. (2013Charnov EL, Gislason H, Pope JG. Evolutionary assembly rules for fish life histories. Fish Fish. 2013; 14(2):213-24. https://doi.org/10.1111/j.1467-2979.2012.00467.x https://doi.org/10.1111/j.1467-2979.2012... ). Mature	0.71	1.30	0.65	0.95	1.72	0.65

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