Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil

Francisco, Talitha Mayumi; Ambrósio, Ângela Maria; Balbi, Thiago José; Zuliani, Marina Soares; Okada, Edson Kiyoshi; Gomes, Luiz Carlos

doi:10.1590/s0073-47212011000300004

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…Casselman (1987) reported that breeding in tropical regions is the most relevant factor for the formation of growth rings. The reproductive process has been identified as causing decline in the growth rate of several fish species, because a larger amount of energy is diverted for gonad development and maturation (Barbieri, 1995;Braga, 1999;Amaral, Aranha & Menezes, 1999;Dei Tos et al, 2010;Francisco et al, 2011). A graphical inspection showed no great differences on back-calculated standard lengths and observed data standard lengths (direct method) (Figure 4).…”

Section: Resultsmentioning

confidence: 97%

Age and growth parameters of the dourado Salminus brasiliensis (Cuvier, 1816) from the river Cuiabá, Mato Grosso State, Brazil

Zuliani

Ambrósio

Francisco

et al. 2016

Acta Sci. Biol. Sci.

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ABSTRACT. Age and growth parameters of Salminus brasiliensis (Curvier, 1816) from the Manso Reservoir and from the river Cuiabá are estimated by their fish scales. Sampling was performed between January and December 2006. There was a linear relationship between the standard length of the fish (cm) and the scale radius (mm) (r = 0.93). The coefficients of variation of standard mean lengths calculated for fish of the same age class were low (>19.0%), while temporal variation analysis of mean marginal increment showed that growth ring was annually formed in November, possibly related to the species's reproductive period between November and January. The maximum number of rings was 12 for both sexes. for females. Females attained greater length and weight than males. Since growth rate for the species was initially accelerated for both sexes, specimens attain size to start migration after the floods, avoiding predation and frequenting sites with greater food availability.

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Section: Resultsmentioning

confidence: 97%

Age and growth parameters of the dourado Salminus brasiliensis (Cuvier, 1816) from the river Cuiabá, Mato Grosso State, Brazil

Zuliani

Ambrósio

Francisco

et al. 2016

Acta Sci. Biol. Sci.

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“…In all studies of age and growth, it is mandatory to validate growth rings, to obtain unbiased estimates of the parameters for the von Bertalanffy model (CASSelmAn, 1983;CyterSki & SpAnGler, 1996;jepSen et al, 1999;FrAnCiSCo et al, 2011). In the review of dei toS et al, 2010, it is show that 52.9% of the aged species of South America did not have their data on age validated as recommended by CAmpAnA (2001).…”

Section: Resultsmentioning

confidence: 99%

“…3). The formation of only one growth ring is considered common for fish from the Neotropical region (AmBróSio et al, 2003;FrAnCiSCo et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

“…They are fundamental components of most present-day fisheries management decisions (CAmpAnA, 2001), however, age determination of fish in tropical regions is a challenge, given the fact that growth rings are not as evident as in temperate regions, where seasonal variation of temperature and luminosity are more conspicuous (SAntoS & BArBieri, 1993). Despite of the difficulties of this type of study (See CurtiS, 1934 for details), FerreirA & ruSS, 1994;FernAndeS et al, 2002;dei toS et al, 2010;FrAnCiSCo et al, 2011, also affirmed that age structure and growth parameters are fundamental components in management decisions specially in the area studied (tropical regions). According FerreirA & ruSS, 1994, the fish diversity is high, particularly the Characiformes and Siluriformes.…”

Section: Palavras-chavementioning

confidence: 97%

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Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil

Ambrósio

Balbi

Francisco

et al. 2014

Iheringia, Sér. Zool.

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ABSTRACT. This study has aims to determine the age and to estimate the growth parameters using scales of the species. Individuals of Piaractus mesopotamicus (Holmberg, 1887) used in this study were captured in the commercial fishery conducted in the region, along the year 2006. The model selected to express the growth of the species was the von Bertalanffy Sl= Sl∞* [1-exp -k(t-to) ]. To determine if scales are suitable for studying the growth of pacu, we analyzed the relation between standard length (Sl) and the radius of the scales through linear regression. The period of annuli formation was determined analyzing the variations in the marginal increment and evaluating the consistency of the readings through the analysis of the coefficient of variations (CVs) for the average standard lengths of each age (number of rings) observed in the scales. The relationship between Ls of the fish and the radius of the scales showed that scales can be used to study the age and growth of P. mesopotamicus (R= 0.79). CVs were always below 20%, demonstrating the consistency of the readings. Annuli formation occurred in February, probably related to trophic migration that occurs in this month in the region. Equations that represents the growth in length obtained for P. mesopotamicus are Sl=50.00* [1-exp -0.18(t-(-3.00) ] for males and Sl=59.23*[1-exp -0.14(t- (-3.36) ] for females. The growth parameters obtained in this study were lower compared to other studies previously conducted for the same species and can related to overexploitation that species is submitted by fishing in the region. These values show also that females of pacu attain greater asymptotic length than males that growth faster. KEYWORDS.Growth rings, scales, von Bertalanffy model, Ford-Walford. -k(t-to) ]. Para saber se as escamas são apropriadas para estudos de crescimento do pacu, nós analisamos a relação entre o comprimento padrão (Cp) e o raio das através de regressão linear. O período de formação dos anéis foi determinado analisando as variações no incremento marginal e a consistência das leituras foi avaliada através da análise do coeficiente de variação (CVs) do comprimento padrão médio para cada idade (número de anéis) observado nas escamas. A correlação entre o Ls do peixe e o raio das escamas mostrou que as escamas podem ser utilizadas para estudos de crescimento do P. mesopotamicus (R= 0.79). Os CVs foram sempre abaixo de 20% demonstrando consistência nas leituras. A formação dos anéis ocorreu em fevereiro provavelmente relacionada com a migração trófica que ocorre neste mês na região. As equações que representa o crescimento em comprimento obtidas para o P. mesopotamicus são: Cp=50.00* [1-exp -0.18(t-(-3.00) ] para machos e Cp=59.23*[1-exp -0.14(t- (-3.36) ] para fêmeas. Os parâmetros de crescimento encontrados neste estudo foram mais baixos quando comparados com outros estudos para a mesma espécie realizados anteriormente e pode estar relacionado com "overexplotation" pela pesca que a espécie é submetida na área. Esses valores...

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“…We are not aware of any study on age-structure of pirá, but we suspect the 10-year generation length (GL) used for including pirá in the 2014 Brazilian red list was an overestimate. Our concern is based on maximum age records for other large Brazilian freshwater fishes, which are: 6 years for Salminus brasiliensis (Tos et al, 2009), 8 years for Prochilodus lineatus (Santana, Minte-Vera, 2017) and Pseudoplastystoma reticulatum (Francisco et al, 2011) and 10 years for Arapaima gigas (Queiroz, 2000) and Pseudoplatystoma corruscans (Mateus, Petrere, 2004). Since the IUCN (2001) definition of generation length used for listing species in the 2014 Brazilian red list was the average age of parents of the current cohort, the 10-year GL used for pirá is higher or equal to the maximum age reported for some other Brazilian large fish.…”

Section: E170131[5]mentioning

confidence: 99%

Fisheries, life-history and conservation status of the catfish pirá Conorhynchos conirostris (Ostariophysi: Siluriformes) in Brazil

Godinho

2018

Neotrop. ichthyol.

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Pirá, Conorhynchos conirostris (Valenciennes, 1840), a large migratory catfish endemic to the São Francisco River (SFR), is listed as threatened in the red lists of both Brazil and the state of Minas Gerais. Although fishing for pirá has been prohibited, it is still an important fishery resource, particularly in the middle SFR. We used historical and current occurrence and abundance data regarding pirá to determine if it meets the IUCN criteria of a threatened species. Pirá occurs in the main course of the SFR as well as in its major tributaries. Unlike the most well-known migratory fishes of the SFR, pirá does not use floodplain lakes as nurseries. In the first half of the 20th century, pirá occurred from the upper to the lower SFR. Currently, it is most abundant in the middle SFR, and is rare in the upper SFR and even rarer in the sub-middle SFR. Pirá has not been captured in the lower SFR since around the mid-1980’s. Despite the reduction in its geographic distribution, we did not find evidence to justify considering pirá as threatened. Thus, we recommend that it be removed from the red lists of Brazil and the state of Minas Gerais.

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Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil

Cited by 3 publications

References 13 publications

<b>Age and growth parameters of the dourado <i>Salminus brasiliensis</i> (Cuvier, 1816) from the river Cuiabá, Mato Grosso State, Brazil

<b>Age and growth parameters of the dourado <i>Salminus brasiliensis</i> (Cuvier, 1816) from the river Cuiabá, Mato Grosso State, Brazil

Aging and growth parameter from the Piaractus mesopotamicus (pacu) from the Cuiabá river, Mato Grosso, Brazil

Fisheries, life-history and conservation status of the catfish pirá Conorhynchos conirostris (Ostariophysi: Siluriformes) in Brazil

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