Validation of an ovarian biopsy method for monitoring oocyte development in the fat snook, Centropomus parallelus Poey, 1860 in captivity

Ferraz, Eduardo Medeiros; Álvarez‐Lajonchère, Luis; Cerqueira, Vinícius Ronzani; Candido, Sidinei

doi:10.1590/s1516-89132004000400018

Cited by 4 publications

(3 citation statements)

References 11 publications

(13 reference statements)

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“…In Mexico and Brazil, broodstock are checked by a biopsy method validated for the fat snook (Ferraz, Alvarez-lajonche' re, Cerqueria & Candido 2004). The minimum vitelogenic oocyte diameters for successful induced spawning of fat snooks have been considered to be between 370 and 400 mm (Cerqueira 1995a;Ferraz, Cerqueira, Alvarez-lajonche' re & Candido 2002).…”

Section: Reproduction and Egg Management Of American Snooksmentioning

confidence: 99%

A review of methods for Centropomus spp. (snooks) aquaculture and recommendations for the establishment of their culture in Latin America

Álvarez‐Lajonchère

Tsuzuki

2008

Aquaculture Res

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The positive features of Centropomids and Latids for cultivation are analysed and highlighted. The main life cycle characteristics as well as market prices and demands are presented. Good growth, highly e⁄cient food conversion ratios and energy utilization allow very high biomass yields per unit volume in nursery and grow-out systems. They have shown notable tolerances to main environmental conditions, as well as considerable versatility in adapting to culture systems (cages, ponds and tanks), and culture intensity (extensive, semi-intensive, intensive and superintensive), especially in estuarine and coastal sites and ponds. These positive features provide them with a high culture potential. A general summary of their culture is presented, based on the commercial cultivation of the Asian sea bass or barramundi Lates calcarifer as well as the experimental and pilot-scale results from the main American species. The importance of hatchery fry production as an essential culture pre-requisite is emphasized, in addition to an analysis of the main di⁄culties and constraints for future development.

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Section: Reproduction and Egg Management Of American Snooksmentioning

confidence: 99%

A review of methods for Centropomus spp. (snooks) aquaculture and recommendations for the establishment of their culture in Latin America

Álvarez‐Lajonchère

Tsuzuki

2008

Aquaculture Res

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“…The finding that female fat snook responded to consecutive hormonal inductions in the same reproductive season could be explained by its groupsynchronous pattern of oocyte development, characteristic of a batch-spawner (Patrona 1984;Ferraz et al 2004). In order to take advantage of this capacity, the effect of multiple inductions to obtain consecutive spawnings was studied in more detail (Cerqueira and Canarin 2007).…”

Section: Hormonal Induction Of Spawningmentioning

confidence: 99%

A review of spawning induction, larviculture, and juvenile rearing of the fat snook, Centropomus parallelus

Cerqueira

Tsuzuki

2008

Fish Physiol Biochem

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The fat snook, Centropomus parallelus, is a commercially valuable marine fish species with potential for aquaculture. This paper describes the development of technology for mass production of fat snook juveniles at the Experimental Fish Hatchery of the Universidade Federal de Santa Catarina, focusing on research about reproduction, larviculture, and juvenile rearing. Induced spawning of wild fat snook was first achieved in 1991 with a single injection of human chorionic gonadotropin (hCG). There was a substantial increase in egg quality when broodstock was conditioned in maturation rooms and induced to spawn. Different dosages of luteinizing hormone-releasing hormone analogue (LHRHa) with saline injection and colesterol implant were also tested. As fat snook exhibits group-synchronous oocyte development, females could be induced to spawn (with 35-50 mug kg(-1) of LHRHa) once a month, resulting in up to four consecutive spawnings. Results of larval culture were highly variable at the beginning; survival rates were frequently around 1% until the juvenile stage. Several experiments were conducted to evaluate the effect of environmental factors and feeding quality on survival and growth. With the improvement of the spawning induction technique and better larviculture practices, survival rates increased to 10-30%. Studies on the particular requirements of juveniles in terms of stocking density, feeding, nutrition, and environmental factors were also performed in order to improve growth rates and feed utilization. The present study demonstrates the feasibility of mass production of fat snook juveniles. However, further research is needed to develop cost-effective grow-out technology.

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“…Some fish that were assigned a particular maturation stage could also have harbored more advanced oocytes that were not collected via the catheter, as catheter samples from live fish were not compared with gonad samples from the same individuals postmortem. However, previous studies of different species have shown that catheter samples generally agree with gonad samples from the same individuals (Shehadeh et al 1973;Garcia 1989;Alvarez-Lajonchère et al 2001;Ferraz et al 2004).…”

Section: Discussionmentioning

confidence: 77%

Nonlethal Sex Determination of the Greater Amberjack, with Direct Application to Sex Ratio Analysis of the Gulf of Mexico Stock

2014

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Stock assessments for the Gulf of Mexico (Gulf) Greater Amberjack Seriola dumerili continue to designate the stock as overfished and undergoing overfishing, despite increasing regulatory measures. Knowledge of sex‐specific spatial distribution and fishing mortality may contribute to our understanding of the stock's overexploitation, especially since Greater Amberjacks may be subject to sex‐specific mortality resulting from minimum size regulations. Currently, the sex ratio of the stock is assumed to be 1:1. An average and range of sex ratios were estimated for the Gulf stock based on sampling of fish landed in the recreational and commercial fisheries and based on released fish that were nonlethally sexed during a tagging study of sex‐specific movement patterns and release mortality. The nonlethal method of sex determination was developed based on external features of the urogenital region; urogenital catheterization was used to validate the external sexing and to collect oocyte samples for determining maturity stages of females during the spawning season. Of the 238 fish (108 males and 130 females) for which sex was verified, only one smaller female was incorrectly sexed. Urogenital catheterization identified females that were spawning or that would likely spawn in the upcoming spawning season, but no differentiation could be made between immature and resting females. Analysis of published data sets suggested that the Gulf stock has an overall female‐skewed sex ratio, with estimates ranging from 1:1.7 to 1:2.5 (male : female), while the nonlethal sexing data from the current study suggest that the overall sex ratio is slightly male skewed (1:0.8) in some regions. All studies report a female‐skewed sex ratio of 1:2.3, on average, for 1,000‐mm FL and larger fish in the Gulf. Sex ratios that deviate from the assumed 1:1 ratio should be incorporated into future assessments of the Gulf Greater Amberjack stock to investigate potential consequences for stock status and management. Received December 30, 2013; accepted May 8, 2014

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Validation of an ovarian biopsy method for monitoring oocyte development in the fat snook, Centropomus parallelus Poey, 1860 in captivity

Abstract: ABSTRACT

Cited by 4 publications

References 11 publications

A review of methods for Centropomus spp. (snooks) aquaculture and recommendations for the establishment of their culture in Latin America

A review of methods for Centropomus spp. (snooks) aquaculture and recommendations for the establishment of their culture in Latin America

A review of spawning induction, larviculture, and juvenile rearing of the fat snook, Centropomus parallelus

Nonlethal Sex Determination of the Greater Amberjack, with Direct Application to Sex Ratio Analysis of the Gulf of Mexico Stock

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