Brycon gouldingi

Lima, Flávio C. T., 2017, A revision of the cis-andean species of the genus Brycon Müller & Troschel (Characiformes: Characidae), Zootaxa 4222 (1), pp. 1-189: 129-133

publication ID

http://doi.org/ 10.5281/zenodo.257769

publication LSID

lsid:zoobank.org:pub:F0EC0A87-B1EE-4B5C-8F53-77A7EEA75F3A

persistent identifier

http://treatment.plazi.org/id/C033D710-4FF7-FF7D-4EA4-FD3BFB0CFEA7

treatment provided by

Plazi

scientific name

Brycon gouldingi
status

 

Brycon gouldingi  Lima, 2004

( Figs. 75–77View FIGURE 75View FIGURE 76View FIGURE 77).

Brycon  sp.: Santos et al., 1984: 42 (Lower rio Tocantins; brief description, diet).

Brycon cf. cephalus: Tejerina-Garro et al., 1998: 402  (Goiás, São Miguel do Araguaia, marginal lakes of the rio Araguaia; relative abundance).

Brycon gouldingi  Lima, 2004: 279–287 (description; type-locality, “ Brazil; Pará; Parauapebas, Igarapé da Boa Vista, tributary of rio Itacaiúnas, Serra dos Carajás c. 5°52’S, 50°29’W ”); Albrecht et al., 2009: 181 –191 ( Serra da Mesa dam, upper rio Tocantins basin, Brazil; weight-length relationships, reproduction, diet, persistence in the reservoir); Caramaschi et al., 2012: 49 ( Brazil, Goiás, Serra da Mesa dam; abundance); Bartolette et al., 2012: 61 ( Brazil, Goiás, Serra da Mesa dam); Albrecht et al., 2012: 205 ( Brazil, Goiás, Serra da Mesa dam; trophic analysis); Pelicice & Agostinho , 2012: 711 ( Brazil Tocantins, Peixe Angical dam fish ladder); Faustino et al., 2015: 1491 –1496 (early development of embryos and larvae).GoogleMaps 

Brycon falcatus  (not Muller & Troschel): Santos et al., 2004: 55 (photograph; rio Tocantins at Tucuruí dam, Pará, Brazil).

Brycon amazonicus  (not Agassiz, in Spix & Agassiz): Mérona et al., 2010: 106, 194 (Lower rio Tocantins, Pará; abundance, impacts of Tucuruí dam).

Brycon  af. melanopterus  (sic) (not Cope): Iglesias-Rios, 2012: 326 (Brazil, Goiás, Serra da Mesa dam: impacts of damming)

Diagnosis. Brycon gouldingi  is distinguished from all its congeners, except B. falcatus  , B. melanopterus  , B. whitei  , B. orbygnianus  , B. orthotaenia  , B. hilarii  , and B. amazonicus  by the possession of the fifth infraorbital bone higher than wide (vs. fifth infraorbital bone about as high as wide, or wider than high in the remaining species), and the presence of several narrow, longitudinal stripes along the dorsolateral surfaces of the body (vs. no narrow, longitudinal stripes along the dorsolateral surfaces of the body). It can be distinguished from B. falcatus  and B. melanopterus  by the possession of wavy longitudinal stripes along the dorsolateral surfaces of the body (vs. straight longitudinal stripes along the dorsolateral surfaces of the body), and darkened pectoral and pelvic fins (vs. pale pectoral and pelvic fins). Brycon gouldingi  is distinguished from B. orbygnianus  , B. hilarii  , B. orthotaenia  , and B. whitei  by the lack of a broad, midlateral stripe along the caudal peduncle and middle caudal-fin rays (vs. presence of such a stripe), and darkened pectoral and pelvic fins (vs. pale pectoral and pelvic fins). The species most similar to B. gouldingi  is B. amazonicus  , from which it can be distinguished by the presence of a distinct crescent- or V-shaped blotch on the caudal peduncle and caudal fin (vs. dark pigment on the caudal peduncle and caudal fin diffuse, never crescent- or V-shaped). See the item “Comparisons” on Brycon amazonicus  for more information on the diagnosis of both species.

Description. Morphometric data are presented in Table 19. One of the largest species in the genus, largest specimen examined reaching 477.9 mm SL. Body moderately slender, moderately high in specimens above 300 mm SL. Largest body height at dorsal-fin level. Dorsal body profile slightly convex from upper lip margin to vertical through anterior naris, straight to slightly concave from this point to supraoccipital tip, moderately convex from this point to dorsal-fin origin, straight along dorsal-fin base, slightly convex from dorsal-fin terminus to adipose-fin origin. Dorsal profile of caudal peduncle slightly concave. Ventral profile slightly convex from lower lip to pelvic-fin insertion, straight to slightly convex from this point to anal-fin origin and approximately straight along anal-fin base. Ventral profile of caudal peduncle slightly concave.

Head profile slightly acute anteriorly, mouth terminal. Maxilla extending posteriorly to vertical slightly anterior to middle of pupil. Adipose eyelid well developed. Premaxillary teeth in three rows; teeth of third row largest. Nine (9), 10 (11), 11 (11), 12 (13), or 13 (5) tricuspidate teeth in outer series. Four (11), 5 (30), or 6 (7) trito pentacuspidate teeth in second, inner premaxillary row, plus 3 (2), 4 (40), or 5 (6) tricuspidate teeth between the first and third rows. Two (3 in one specimen) teeth in third premaxillary row, medial teeth largest, pentacuspidate, symphyseal teeth smaller, tri- to pentacuspidate. Maxillary margin approximately straight, except for slight convexity in its distal extremity. Eleven to 21 maxillary teeth, slightly smaller than teeth of first premaxillary row, anterior teeth tricuspidate, posterior teeth unicuspidate. Dentary with 8 (1), 9 (9), 10 (7), 11 (1), or 12 (2) teeth in main series. Anterior four dentary teeth assymetrical, considerably larger and bulkier than remaining teeth, pentacuspidate, each with central cusp distinctly larger than remaining cusps. Remaining dentary teeth progressivelly smaller, penta-, tri- to unicuspidate. Inner (lingual) series consisting of a single symphyseal tooth, considerably smaller than teeth of main series anterior to it, plus row of 15 small, unicuspidate teeth, originating at level of 6th tooth of main series.

Scales cycloid. Lateral line complete, from supracleithrum to caudal-fin base. Sixth-six (1), 69 (1), 71 (1), 72 (4), 73 (5), 74 (8), 75 (5), 76 (7), 77 (5), 78 (5), 79 (2), 80 (3), 81 (1), or 82 (1) scales in lateral line series; laterosensory tube ramified, each lateral line scale with two to three branchs in the smallest specimen examined ( MZUSPAbout MZUSP 18196, 118.5 mm SL), gradually becoming more complex during ontogeny, up to the development of ascendent and descendent main branches, and about 6 to 10 secondary branches in specimens larger than 300 mm SL. Horizontal scale rows between dorsal-fin origin and lateral line 13 (6), 14 (24), 15 (14), or 16 (3). Horizontal scale rows between lateral line and pelvic-fin insertion 7 (2), 8 (17), 9 (22), or 10 (6). Circumpeduncular scales 20 (2), 21 (3), 22 (20), 23 (19), 24 (3), or 25 (1).

Dorsal-fin rays ii, 9. Dorsal fin origin approximatelly at middle of SL. First dorsal-fin pterygiophore inserting behind neural spine of 14th vertebra. Anal-fin rays iii (not including first, small unbranched ray only visible in the cs specimen), 18 (1), 19 (1), 20 (2), 21 (4), 22 (16), 23 (13), or 24 (10). First anal-fin pterygiophore inserting behind haemal spine of 28th vertebra. Pectoral-fin rays i, 12 (4), 13 (22), 14 (20), or 15 (2); pelvic-fin rays i,6 (3), 7 (43), or 8 (2); main caudal-fin rays 10/9. Last unbranched and anterior 2–3 anal-fin rays longer, remaining rays progressively shorter towards anal-fin end. Anal fin presenting small hooks on posterior branch of branched rays in one specimen ( MZUSPAbout MZUSP 70420). Sheath of scales composed of 4 to 5 horizontal series, covering basal third of analfin rays. Caudal fin forked, lobes slightly emarginated.

Four branchiostegal rays. First gill arch with 15 (3), 16 (3) or 17 (3) lower gill rakers, 16 (2), 17 (5), or 18 (2) upper gill rakers and 1 at angle. Vertebrae 47 (1). Supraneurals 10 (1).

Coloration in alcohol. Overall color pattern of specimens still retaining guanin light gray dorsally, with silvery hue. Top of head and snout dark gray; infraorbitals and opercle silvery. Maxilla, gular area, and dentary light brown. Dorsolateral body surfaces silvery to coppery, dark brown dorsally, becoming gradually clear ventrally. Humeral blotch present, oval, horizontally elongated, formed by subjacent pigment, lying above lateral line, at level of second to fourth scales. Longitudinal stripes extending all along the trunk, wavy, formed by dark pigment concentrated on upper and lower scale margins in dorsolateral surfaces of body. Relatively faint, rounded dark area on caudal peduncle. Caudal pigmentation contiguous with caudal peduncle blotch, occupying most of caudal fin except for distal margin and two dorsalmost and two ventralmost principal rays. Contour of blotch formed by dark pigmentantion on caudal peduncle and caudal fin crescent or V-shaped. Moderate to heavy darkly pigment on pectoral fins, pigmentation mainly concentrated on outermost seven to eight rays. Pelvic fins pale to intensely dark. Intense dark pigmentation on anal-fin interradial membranes, mainly on posteriormost rays. Dorsal fin pale, with some dark pigmentation on interradial membranes. Adipose fin dark gray. Specimens which lost guanine as a result of long storage in formalin with overall color pattern brownish, without silvery hues on dorsolateral surfaces of body, infraorbitals, or opercle, and with longitudinal stripes more evident.

Color in life. Description based on slides taken by Carlos Figueiredo from two individuals collected in the rio Tocantizinho basin, upper rio Tocantins, in the region of the present Serra da Mesa dam, and from specimens collected by J.B. Nunes in the rio Araguaia system. Dorsum bluish-gray; top of head and snout dark gray; sides of body, opercle and infraorbitals pale, with metallic hue; humeral blotch and wavy dark stripes on sides of body clearly visible; pectoral fin darkened; crescent-shaped black blotch on caudal peduncle and caudal fin conspicuous. Dorsal and adipose fins reddish, pelvic and anal fins yellowish, with a tenuous, dark basal stripe.

Common names. Matrinchã, piabanha ( Santos et al., 1984: 42)  .

Distribution. Endemic from the rio Tocantins basin, where it is widespread in the main river systems: the rio Tocantins itself, rio Araguaia, rio das Mortes, rio Paranã, and rio Itacaiúnas, Brazil ( Fig. 74View FIGURE 74). In the last few years, Brycon gouldingi  has been stocked outside its native range, and escaped specimens were reported from the rio São Francisco in Pernambuco (J.M. Barbosa, pers. comm..). Mauro C. Lopes (pers. comm..) photographed a juvenile of the species fished at the rio Xingu in the Parque Indígena do Xingu, Mato Grosso, in 2008. Since extensive collecting activities just above the park, in the rio Culuene, revealed only Brycon falcatus  (pers. obs.), it is suspected that this record might be the result of released specimens collected from the neighbouring rio Araguaia basin. At least one rancher at the upper rio Xingu basin was known to stock fishes from the rio Araguaia system. These fishes were released into the rio Suiá-Missu (a tributary of the upper rio Xingu) when the dam where they were stocked burst after major rains (Lício Moraes, pers. comm.). There are still no evidence of established populations outside the natural area of distribution.

Ecological notes. Diet mentioned as being composed of fruits and insects ( Santos et al., 1984: 42).

Examination of the stomach contents of one specimen ( MZUSPAbout MZUSP 18069, 161.3 mm SL), revealed mainly pieces of fruits and crushed seeds, but also a small cockroach and an ant. Albrecht et al. (2009), in a detailed analysis of the diet of the species at Serra da Mesa dam, found, in order of importance, seeds and fruits, terrestrial invertebrates, and fishes as the most important dietary itens for the species. James B. Nunes (pers. comm.) reported that the species undertakes massive migrations in the area of Ilha do Bananal, middle rio Araguaia basin. Brycon gouldingi  leave the floodplains at the end of the rainy season in mixed schools with Prochilodus nigricans  and Leporinus trifasciatus  . Breeding schools are observed during the rainy season, between December and March.

Conservation. The rio Tocantins basin is progressively being dammed, with five major hydroelectric dams already in operation (Tucuruí, Estreito, Lajeado, Peixe/Angical, and Serra da Mesa) and a few more being planned. It is expected that, as a presumable long-range total spawner, Brycon gouldingi  populations will be severely impacted by these dams. Prospects on the rio Araguaia are a litlle better, since not much hydroelectric development is expected in that river basin due to its general low gradient. Overall, the conservation status of Brycon gouldingi  give some causes to concern as long as developmental plans for the Araguaia/ Tocantins basin by the Brazilian government remain unabated.

Material examined. Type material. Holotype: MZUSPAbout MZUSP 61400View Materials (1, 374.7 mm SL): Brazil; Pará; Parauapebas, Igarapé da Boa Vista , tributary of rio Itacaiúnas , Serra dos Carajás c. 5°52’S, 50°29’W; M. Goulding, Nov 1983GoogleMaps  . Paratypes: Brazil, Pará: MZUSPAbout MZUSP 56808View Materials (3, 214.8– 237.2 mm SL)  ; MZUSPAbout MZUSP 56948View Materials (1, 262.3 mm SL): Parauapebas, Serra dos Carajás, rio Itacaiúnas; Caldeirão , c. 5°52’S, 50°29’W; M. Goulding, April 1983GoogleMaps  . MZUSPAbout MZUSP 56949View Materials (3, 313.4– 365.9 mm SL): Parauapebas, igarapé do Cinzento, rio Itacaiúnas , c. 5°51’S, 50°32’W; M. Goulding, Nov 1983GoogleMaps  . MZUSPAbout MZUSP 58044View Materials (1, 224.4 mm SL): Parauapebas, igarapé Salobo, tributary of rio Itacaiúnas , 5°46’50’’S 50°32’48’’W; P.S. Pompeu, July 1997GoogleMaps  . MZUSP 57033 (28, 199.7–298.0 mm SL); MCP 34184 (1, 223.5 mm SL); FMNH 112957 (1, 218.0 mm SL); USNMAbout USNM 374028View Materials (1, 220.7 mm SL): Parauapebas, rio Itacaiúnas, Caldeirão , c. 5°52’S, 50°29’W; M. Goulding, April / May 1983GoogleMaps  .; MZUSPAbout MZUSP 61399View Materials (1, 353.9 mm SL): Parauapebas, Igarapé Águas Claras , Serra dos Carajás, c. 5°52’S, 50°29’W; M. Goulding, Nov 1983GoogleMaps  . MZUSPAbout MZUSP 31449View Materials (1, 345.1 mm SL): Parauapebas, rio Itacaiúnas , Serra dos Carajás, c. 5°52’S, 50°29’W; M. Goulding, Nov 1983GoogleMaps  . MZUSPAbout MZUSP 18100View Materials (1, 161.5 mm SL): marginal lake from igarapé Espírito Santo, between Baião and Tucuruí , rio Tocantins; EPA, 11 Sept 1970  . MZUSPAbout MZUSP 18090View Materials (1, 231.2 mm SL): Baião , rio Tocantins, c. 2°48’S, 49°41’W; EPA, 9–10 Sept 1970GoogleMaps  . MZUSPAbout MZUSP 18078View Materials (2, 152.5– 186.5 mm SL): igarapé do Limão, near Baião , rio Tocantins, c. 2°48’S, 49°41’W; EPA, 9 Sept 1970GoogleMaps  . MZUSPAbout MZUSP 18050View Materials (1, 192.0 mm SL): Paraná Samuuma, mouth of Tocantins, c. 1°56’S, 49°12’W; EPA, 4 Sept 1970GoogleMaps  . MZUSPAbout MZUSP 18196View Materials (1, 118.5 mm SL): igarapé dos 5, km 5 from the road Tucuruí-Mato Grosso , c. 3°42’S, 49°27’W; EPA, 22 Sept 1970GoogleMaps  . MZUSPAbout MZUSP 18069View Materials (2, 1 cs, 161.3–198.9 mm SL): Mocajuba, igarapé Oxipucu , rio Tocantins, 2°34’S, 49°31’W; EPA, 8 Sept 1970GoogleMaps  . INPAAbout INPA 16370View Materials (1, 226.2 mm SL): rio Tocantins, Tucuruí fish market, c. 3°42’S, 49°27’W; Eq. Ictiologia / INPAAbout INPA, 27 June 1982GoogleMaps  . INPAAbout INPA 16367View Materials (1, 121.0 mm SL): rio Tocantins, igarapé Vermelho, 0.5 hour above its mouth, Itupiranga , c. 5°09’S, 49°20’W; Eq. Ictiologia / INPAAbout INPA, 2 July 1982GoogleMaps  . INPAAbout INPA 16393View Materials (1, 107.7 mm SL): Acarí Pucú , rio Tocantins, 2°42’S, 49°43’W; Eq. Ictiologia / INPAAbout INPA, 27 March 1982GoogleMaps  . INPAAbout INPA 16379View Materials (1, 210.7 mm SL): rio Tocantins, Tucuruí , c. 3°42’S, 49°27’W; Eq. Ictiologia / INPAAbout INPA, 26 Oct 1980GoogleMaps  . INPAAbout INPA 16376View Materials (3, 158.1– 184.4 mm SL): rio Tocantins, Itupiranga , c. 5°09’S, 49°20’W; Eq. Ictiologia / INPAAbout INPA, 6 July 1980GoogleMaps  . INPAAbout INPA 16247View Materials (1, 289.0 mm SL): rio Tocantins, Itupiranga , Ressaca dos Macacos, c. 5°09’S, 49°20’W; Eq. Ictiologia / INPAAbout INPA, 3 July 1982GoogleMaps  .

Non types. Brazil, Tocantins: UNTAbout UNT 2197View Materials (1, 477.9 mm SL): Peixe, rio Santa Tereza , c. 11°47’S, 48°38’WGoogleMaps  ; NEAMB, 12 March 2001. UNT 3442 (2, 92.3–116.2 mm SL); UNT 3440 (1, 136.8 mm SL); UNTAbout UNT 3517View Materials (1, 244.0 mm SL): Porto Nacional , rio Tocantins, c. 10°42’S, 48°25’WGoogleMaps  ; NEAMB, Feb –April 2002. INPAAbout INPA 20117View Materials (1, 254.8 mm SL): Caseara, rio Araguaia , Lago Volta Grande, P.E. Cantão, 9o47’19” S, 50o 9’53” W; J. Zuanon et al., 19 May 2000GoogleMaps  . INPA 20490 (1, 359.0 mm SL): Caseara, lago Paredão, P.E. Cantão, 9o22’40” S, 49o58’32” W; J. Zuanon et al., 19 Feb 2000. Goiás: MZUSPAbout MZUSP 44572View Materials (1, 382.2 mm SL): Monte Alegre de Goiás, rio Paranã, above mouth of rio Bezerra , c. 13°16’S, 47°31’W; J.C. Oliveira & W.J. E.MGoogleMaps  . Costa, 10–13 Jan 1989  . MZUSPAbout MZUSP 70423View Materials (1, 283.8 mm SL): rio Tocantins, below Serra da Mesa dam, 13°49'55’’S, 48°17'44’’W; D.F. Moraes et al., 5 Feb 1997GoogleMaps  . MZUSPAbout MZUSP 70422View Materials (1, 278.2 mm SL): Serra da Mesa dam, rio Tocantizinho arm, 13°57'S, 48°15'WGoogleMaps  ; D.F. Moraes and D. A. Halboth, 6 June 1997. MZUSPAbout MZUSP 70420View Materials (1, 328.1 mm SL): Serra da Mesa dam, rio Palmeirinha arm, 14°3'57'’S, 48°29'37'’W; D.F. Moraes and D  . A. Halboth, 16 Feb 1995. MZUSPAbout MZUSP 70421View Materials (1, 251.2 mm SL): Serra da Mesa dam, above rio Castelo Grande , 14°8'S, 48°44'WGoogleMaps  ; D.F. Moraes, 10 June 1997. MZUSPAbout MZUSP 70752View Materials (1, 346.2 mm SL): Serra da Mesa dam, rio Tocantizinho arm, 14°00’S, 48°11’WGoogleMaps  ; D.F. Moraes and D. A. Halboth, 5 Feb 1998. MCPAbout MCP 17280View Materials (1, 452, 7 mm SL): Luís Alves, marginal lagoons of the rio Araguaia , 13°14'S, 50°35'WGoogleMaps  ; F.L.T. Garro, 21 April 1994. MCZAbout MCZ 21126View Materials (1, 355.0 mm SL): “Goyaz” (exact locality unknown; see Lima, 2004: 285); “Honório” [A.H. Ferreira], 1867  . Mato Grosso: MZUSPAbout MZUSP 48114View Materials (1, 365.4 mm SL): Barra do Garças, Córrego da Ponte Queimada, c. 15°53’S, 52°15’W; W.P. Margarido, 1 Sept 1993GoogleMaps  . MZUSPAbout MZUSP 60411View Materials (1, 278.3 mm SL): Barra do Garças, rio Araguaia , Ouro Fino, 30 km below Barra do Garças, 15°52´03´´S, 51°58´17´´W; W. Barrella et al., 6–7 Oct 1997GoogleMaps  .

TABLE 19. Morphometric data of Brycon gouldingi (A, holotype, MZUSP 61400).

Mean
374.7 48 118.5–477.9
46
48
48
48
Posterior terminus of dorsal fin to hypural joint 48
47
48
48
48
46
48
44
48
48
48
48
48
48
48
48
MZUSP

Museu de Zoologia da Universidade de Sao Paulo

USNM

Smithsonian Institution, National Museum of Natural History

INPA

Instituto Nacional de Pesquisas da Amazonia

UNT

Universidad nacional de Tucumn

MCP

Pontificia Universidade Catolica do Rio Grande do Sul

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Characiformes

Family

Bryconidae

Genus

Brycon

Loc

Brycon gouldingi

Lima, Flávio C. T. 2017
2017
Loc

Brycon amazonicus

Merona 2010: 106
2010
Loc

Brycon gouldingi

Faustino 2015: 1491
Bartolette 2012: 61
Albrecht 2012: 205
Pelicice 2012: 711
Albrecht 2009: 181
2009
Loc

Brycon falcatus

Santos 2004: 55
2004
Loc

Brycon

Santos 1984: 42
1984
Loc

Brycon cf. cephalus: Tejerina-Garro et al., 1998 : 402

Tejerina-Garro 1998: 402