Age and growth of the largemouth perch Percichthys colhuapiensis in the Negro river, Argentine Patagonia

Cazorla, Andrea López; Sidorkewicj, Nora Silvia

doi:10.1016/j.fishres.2008.01.016

Cited by 15 publications

(9 citation statements)

References 19 publications

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“…On the contrary, for larger sizes the sole use of otoliths is recommended for this species because scales have been found to seriously underage individuals, leading to an underestimation of fish longevity (12 vs 15 years). These results were opposite to those reported for P. colhuapiensis in the same riverine system, with use of scales as the most suitable structures (Lopez Cazorla and Sidorkewicj, 2008).…”

Section: Discussioncontrasting

confidence: 99%

“…(2009) reported a maximum age of 4 years for the Chilean species Percilia irwini in the Andalién River and Biobío River basins. In Argentina, work performed on the largemouth perch Percichthys colhuapiensis in the Negro River, demonstrated a longevity of 11 years for this fish (Lopez Cazorla and Sidorkewicj, 2008), which extended the maximum age of 8 years previously reported for the species in other Patagonian environments, the Ramos Mexía dam (Guerrero, 1989) and the Limay River and Neuquén River basins (Guerrero, 1984). It has been largely discussed if P. colhuapiensis , commonly found co‐occurring with creole perch, is a different species (López‐Arbarello, 2004) or a sympatric morph of P. trucha (Ruzzante et al., 2003, 2006).…”

Section: Discussionsupporting

confidence: 66%

“…However, solely with the base of morphological differentiation of both perch, the strong differences we have encountered between them in the maximum ages observed, i.e. 11 years for P. colhuapiensis (Lopez Cazorla and Sidorkewicj, 2008) and 15 years for P. trucha (present study), could provide new evidence for the possible solution of the problematic issue in the systematics of the genera.…”

Section: Discussionmentioning

confidence: 47%

“…1). A thorough description of the study area is available from Lopez Cazorla and Sidorkewicj (2008).…”

Section: Methodsmentioning

confidence: 99%

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Age, growth and reproduction in creole perch (Percichthys trucha) in the Negro River, Argentinean Patagonia

Cazorla

Sidorkewicj

2010

Journal of Applied Ichthyology

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Age, growth and reproductive characteristics of creole perch, Percichthys trucha, were investigated in the Negro River, southern Argentina from samples collected seasonally, December 1994-December 1995 Age was estimated via scale and whole otolith reading methods. Total length (n = 413) ranged from 103 to 432 mm, and weight from 12 to 1042 g. Significant differences between the length-weight relationships of males and females were detected (P < 0.05). Isometric growth was observed in juveniles and males, whereas total population and females exhibited positive allometric growth. The marking pattern in scales and otoliths followed an annual rhythm, with the formation of only one annulus in scales and only one hyaline band in otoliths during autumn-winter. The oldest males were 5 years old whereas maximum age in females was 12 years from scales and 15 years from otoliths. Because scales were found to underestimate age in individuals older than 4 years, otoliths were considered to be the best structures for creole perch age determination. Gompertz growth parameters based on otolith data were L¥: 428.0 mm, k = 0.46 and t 0 = 0.43 for total population (r = 0.90), L¥: 410.7 mm, k = 0.42 and t 0 = 0.46 for males (r = 0.91), and L¥: 434.1 mm, and k = 0.49 and t 0 = 0.43 for females (r = 0.91). Lengths at first maturity (TL 50 ) were 260 and 241 mm in males and females, respectively, both of which corresponded to ages between 1 and 2 years. Macroscopic gonad inspection and the high percentage of juveniles captured during summer indicated that spawning begins at the end of spring.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 47%

“…1). A thorough description of the study area is available from Lopez Cazorla and Sidorkewicj (2008).…”

Section: Methodsmentioning

confidence: 99%

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Age, growth and reproduction in creole perch (Percichthys trucha) in the Negro River, Argentinean Patagonia

Cazorla

Sidorkewicj

2010

Journal of Applied Ichthyology

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“…Growth parameters and mortality for instance, may strongly differ among lakes (Barriga et al ., ) and therefore strongly influence a population's response to exploitation. Unfortunately, information on Patagonian fish population parameters and biological attributes is still scarce (Guerrero, , ; Lafarga & Guerrero, ; Ruiz, ; Lopez Cazorla & Sidorkewicj, , ).…”

Section: Lake Characteristics and Bionomic Featuresmentioning

confidence: 99%

Freshwater fishes of Patagonia: conservation and fisheries

Cussac

Habit

Ciancio

et al. 2016

Journal of Fish Biology

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The absence of much literature on the Patagonian fish fauna in comparison with that of the neotropics, has previously been blamed on its poor species diversity. Knowledge of the fishes of Patagonia, however, rose sharply at the beginning of the present century, allowing for an understanding of the complex biogeographical history that has led to the present diversity and distribution patterns. There are several new and potential threats to biodiversity and conservation of Patagonian fishes, such as the introduction of exotic species, damming, climate change and changes geared to safeguard economic interests, often acting synergistically. A great amount of new information is now available and the aim of the present review is to articulate this knowledge in a comprehensive way in order to aid in the development of tools to face the increasing challenges posed by environmental change and human activity. Knowledge about fishes of Patagonia has grown at the same time as human actions, and presence.

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