Age and growth of dusky grouper (Epinephelus marginatus) (Perciformes: Epinephelidae) in the southwestern Atlantic, with a size comparison of offshore and littoral habitats

Condini, Mário V.; Albuquerque, Cristiano Queiroz de; Garcia, Alexandre

doi:10.7755/fb.112.4.7

Cited by 14 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The deposition of opaque bands in D. auriga coincides with peaks in its spawning season. The seasonal pattern of band formation is also in agreement with the same process in other demersal fish species from the study area: Macrodon atricauda (Günther 1880) (Cardoso & Haimovici, 2011), Epinephelus marginatus (Lowe 1834) (Condini et al, 2014), Cynoscion guatucupa (Cuvier 1830) (Vieira & Haimovici, 1993) and Umbrina canosai Berg 1895 (Haimovici & Reis, 1984). As the genus Dules Cuvier 1829 is monospecific, its growth strategy was compared with other small-sized species of the genus Serranus Cuvier 1816: Serranus cabrilla (L. 1758), Serranus hepatus (L. 1758), Serranus atricauda Günther 1874 and Serranus scriba (L. 1758) (Table V).…”

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Life history and initial assessment of fishing impacts on the by‐catch species Dules auriga (Teleostei: Serranidae) in southern Brazil

Rovani

Cardoso

2017

Journal of Fish Biology

View full text Add to dashboard Cite

The life history of Dules auriga, a small hermaphrodite serranid species inhabiting deep waters and a frequent component of the discarded catch of bottom trawling in southern Brazil, was studied to assess the fishery effects on the stock through the estimation of the remaining spawning-potential ratio. Sampling was conducted throughout a year and included specimens to determine sex, maturity and age. Age was validated by the edge type and marginal-increment analysis. The oldest and the largest individuals were 9 years and 195 mm total length. Growth parameters fitted to the von Bertalanffy equation were L = 178·34 mm, k = 0·641 year and t = -0·341 years. Length and age at first maturity were 140·72 mm and 2 years, respectively. The reproductive season was throughout the austral spring and summer. The assessment of the effects of fishing showed that it may have resulted in a loss of 50% of the spawning potential. This loss may be higher when taking into account the uncertainty in the life-history parameters and could be considered of concern for the population. Fast growth, moderate longevity, long spawning season, small size and age at maturity make D. auriga relatively resilient to the removal of biomass by fishing. When considering the uncertainty, however, the losses of the spawning potential have been severely reducing the population resilience in the face of ecosystem changes.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Life history and initial assessment of fishing impacts on the by‐catch species Dules auriga (Teleostei: Serranidae) in southern Brazil

Rovani

Cardoso

2017

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…In contrast, only immature individuals and resting mature females are found along rocky substrate in the littoral zone (Seyboth et al 2011). Although comparative studies suggest that dusky grouper growth rates are higher in neritic habitats (Condini et al 2014b), the relative importance of the different habitats for this endangered species remains unknown. A better understanding of habitat use patterns of marine fish populations is vital to evaluate their dynamics and resilience to harvest, ultimately supporting adequate management and conservation measures (Andrello et al 2014, Davoren et al 2015.…”

Section: Dusky Grouper Epinephelus Marginatusmentioning

confidence: 90%

“…Otoliths of a total of 72 individuals of E. marginatus were extracted for chemical analysis; 28 of these individuals, aged between 2 and 12 yr (mean ± SD: 4.8 ± 2.4 yr), were sampled in the littoral zone (rocky jetties) and 44, aged between 2 and 40 yr (11.9 ± 10.8 yr), were sampled in the neritic zone (Carpinteiro Bank). Age determination using otoliths has already been validated for E. marginatus in this study area (Condini et al 2014b). All procedures for otolith chemical analysis followed Mai et al (2014).…”

Section: Methodsmentioning

confidence: 99%

Prolonged estuarine habitat use by dusky grouper Epinephelus marginatus at subtropical latitudes revealed by otolith microchemistry

Condini¹,

Tanner²,

Patrick³

et al. 2016

Endang. Species. Res.

View full text Add to dashboard Cite

Otolith microchemistry (Sr:Ca, Ba:Ca) was used to evaluate habitat use patterns of the endangered dusky grouper Epinephelus marginatus in southern Brazil. Individual Sr:Ca profiles exhibited low variation, with an overall tendency to increase with age. Interestingly, individual Ba:Ca profiles presented 3 contrasting patterns: the first comprised most sampled individuals (> 80%), mostly indicative of the predominant use of marine waters throughout their life history; the second pattern (~10% of all individuals) indicated that dusky grouper may use or remain in or near estuarine waters for short time periods; finally, the third identified pattern (~5%) comprised individuals remaining in estuarine waters for long periods and provided the first evidence for this species of prolonged estuarine habitat use (over a year), in particular during juvenile life stages.

show abstract

“…All samples were subjected to gross examination then dissected, where the sexes were distinguished and separated. The total length of each fish was measured to the nearest 0.1 cm, and the total body weight was determined to the nearest 0.1 g. Samples of scales from each fish were collected and stored in 70% alcohol for later age determination according to the method described by Condini et al (2014) .…”

Section: Methodsmentioning

confidence: 99%

Demographic structure and stock status of Lethrinus lentjan in Saudi coastal waters of the Red Sea

Younis

Abdel-Warith

Al-Asgah

et al. 2020

Saudi Journal of Biological Sciences

View full text Add to dashboard Cite

Fishes of the family Lethrinidae form a considerable portion of the catch from both the Red Sea and the Arabian Gulf in Saudi Arabia, and the species Lethrinus lentjan (Lacepède, 1802) is one of the most important among these fishes. This study was conducted to evaluate the demographic structure coefficients, survival rate, and stock status of L. lentjan from the Red Sea coast of Saudi Arabia. A total of 593 samples were collected on a monthly basis for a period of one year from the landing site for fishing boats operating in Red Sea waters off Jeddah. The results indicated that 88.87% of the specimens were female; the maximum total length recorded was 43.5 cm with the most frequent length (14.67%) being 23–23.9 cm. The maximum age recorded for both males and females was 6 year-plus, and the 1 year-plus age category represented the majority of the samples (57.67%). The total mortality coefficient, natural mortality coefficient, and fishing mortality coefficient were 1.538, 0.315, and 1.223, respectively; all mortality coefficients in the female fishes were higher than those in the male fishes. The survival rate of males was higher (0.617) than that of females (0.214). The results of the present study indicate that L. lentjan is subjected to overfishing and a new management strategy is necessary to improve the stock status of this fish species.

show abstract

Age and growth of dusky grouper (Epinephelus marginatus) (Perciformes: Epinephelidae) in the southwestern Atlantic, with a size comparison of offshore and littoral habitats

Cited by 14 publications

References 32 publications

Life history and initial assessment of fishing impacts on the by‐catch species Dules auriga (Teleostei: Serranidae) in southern Brazil

Life history and initial assessment of fishing impacts on the by‐catch species Dules auriga (Teleostei: Serranidae) in southern Brazil

Prolonged estuarine habitat use by dusky grouper Epinephelus marginatus at subtropical latitudes revealed by otolith microchemistry

Demographic structure and stock status of Lethrinus lentjan in Saudi coastal waters of the Red Sea

Contact Info

Product

Resources

About