La longevidad del besugo Epigonus crassicaudus en Chile: ¿es similar a la de sus parientes?

Ojeda, Vilma; Wiff, Rodrigo; Labrín, Carla; Contreras, Francisco

doi:10.4067/s0718-19572010000300015

Cited by 7 publications

(10 citation statements)

References 9 publications

(6 reference statements)

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“…In addition, we found a low frequency of spent females throughout the year, indicating that ovary development of this species is likely to be low. This agrees with other life history characteristics typical of deep‐water species as described also in cardinalfish, such as long life span, low growth rate and high vulnerability to fishing exploitation (Gálvez et al., ; Ojeda et al., ; Tascheri et al., ).…”

Section: Discussionsupporting

confidence: 90%

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Reproductive biology of female cardinalfish, Epigonus crassicaudus de Buen, 1959

et al. 2015

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Summary The cardinalfish (Epigonus crassicaudus) is a long‐lived and endemic deep‐water fish inhabiting the central and southern coast off Chile. Knowledge about basic biological attributes including maturity aspects is fragmentary in this species. The historical and comprehensive data available are applied to provide a detailed study of the reproductive biology of the female cardinalfish. The gonadosomatic index was computed from 5110 female gonads collected by onboard scientific observers between October 2000 and December 2012. A total of 1467 females gonads collected between March 2007 and December 2009 were subjected to histological analysis of maturation upon which a maturity ogive was estimated. The ovarian development of this specie is asynchronous, characterized by a continuous reproductive cycle in which reproductive activity is found throughout the year with a maximum during the austral autumn and summer (between May and June). Length at 50% maturity was estimated in 23.2 cm of fork length (95% CI: 21.7–23.9 cm). The results presented here are compared with previous sparse estimates available for this species.

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Section: Discussionsupporting

confidence: 90%

“…Currently, only basic knowledge for cardinalfish on growth (Gálvez et al., ; Cubillos et al., ; Ojeda et al., ; Contreras‐Reyes and Arellano‐Valle, ), natural mortality (Cubillos et al., ; Tascheri et al., ) and maturity (Gálvez et al., ; Cubillos et al., ) is available. Gálvez et al.…”

Section: Introductionmentioning

confidence: 99%

Reproductive biology of female cardinalfish, Epigonus crassicaudus de Buen, 1959

et al. 2015

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“…Age determination was assessed using transversal sections of the right sagittal otoliths, which were prepared according to the method described by Ojeda et al . (2010). The otolith sections were read and measured with reflected light under a stereoscopic microscope at 20× magnification.…”

Section: Methodsmentioning

confidence: 99%

“…Previous studies using whole otoliths produced zone count readings which resulted in maximum age being estimated as 15 years (Gálvez et al, 2000;Cubillos et al, 2009;Contreras-Reyes & Arellano-Valle, 2013). In contrast, Ojeda et al (2010), by reading transverse or cross-sections of polished and burnt otoliths, reported a maximum age of 54 years. The marked increase in concavity of the otolith morphology as otoliths grow, could explain the differences between these methods with the transverse section method more clearly highlighting the growth zones and the detail of the sequence of the assumed annuli from the nucleus to the otolith edge.…”

Section: Introductionmentioning

confidence: 99%

Validation of the first annulus and growth model fit for the cardinalfish (Epigonus crassicaudus)

et al. 2018

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Age and growth parameters were estimated for the deep-sea cardinalfish (Epigonus crassicaudus) from sagittal otoliths collected between 2012 and 2015 onboard commercial fishing vessels from the South-east Pacific off Chile between 33°04′S and 41°46′S. Von Bertalanffy growth parameters (VBGP) were estimated from assumed annual otolith growth zone counts. The verification of the first annulus of sagittal otoliths was determined by examining in detail daily micro-increments. These data helped inform the interpretation of the annual growth zones from transverse otolith sections. The von Bertalanffy growth model estimated to length-at-age data were asymptotic length (L∞) of 34.1 cm fork length (FL), a growth coefficient (k) of 0.1 cm/year and a t-zero (t0) of −0.85. The maximum ages observed were 67 and 65 years for female and male fish, respectively.

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“…Sagittae otoliths were extracted, dried and stored in paper envelopes and carefully labeled to ensure traceability. Then, in the laboratory, age in years of each specimen was assigned on otoliths transversal sections according to the criteria described by Ojeda et al (2010) and Moyano et al (2018). Ovary of each female was classified into six stages, according to macroscopic maturity scale (Balbontín & Bravo, 1993), virginal (1), immature (2), maturation (3), mature (4), mature with recent spawning (5) and regressing (6).…”

Section: Reproductionmentioning

confidence: 99%

Reproductive traits and natural mortality of the cardinalfish Epigonus crassicaudus: crucial information for stock assessment and sustainable management measures

Moyano¹,

Cerna²,

Leal³

et al. 2020

Lat. Am. J. Aquat. Res.

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Reproductive traits and natural mortality rate of cardinalfish females (Epigonus crassicaudus) were studied from samples collected onboard commercial fishing vessels, from 2012 to 2015, on the Chilean coast. The reproductive cycles of females analyzed thought gonadosomatic index (GSI) showed a maximum reproductive activity in austral fall, between March and May. Length (L50%) and age (A50%) at maturity, estimated using a macroscopic scale of the developed ovary, was 22.3 cm fork length (FL) and 9.3 years, respectively. Natural mortality (M) was estimated by two age-related methods. Using maximum age (tmax) M was estimated in 0.063 yr-1 and through age-at-maturity (A50%) in 0.15 yr-1. A potential bias in the reproductive study is discussed when a macroscopic maturity scale is used. Nevertheless, its usefulness is validated when funding is scarce, and time is limited. Although M uncertainty was not evaluated, the estimated range appears to be into the expected values to long-lived species. The life history parameters estimated in the present study can be used to evaluate possible time variability in maturity and M rates. Also, these results could be used in stock assessment analysis and to apply effective management measures in the fishery.

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La longevidad del besugo Epigonus crassicaudus en Chile: ¿es similar a la de sus parientes?

Cited by 7 publications

References 9 publications

Reproductive biology of female cardinalfish, Epigonus crassicaudus de Buen, 1959

Reproductive biology of female cardinalfish, Epigonus crassicaudus de Buen, 1959

Validation of the first annulus and growth model fit for the cardinalfish (Epigonus crassicaudus)

Reproductive traits and natural mortality of the cardinalfish Epigonus crassicaudus: crucial information for stock assessment and sustainable management measures

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