Aspects of the reproductive biology of the sharpsnout seabream Diplodus puntazzo (Cetti, 1777). I. Gametogenesis and gonadal cycle in captivity during the third year of life

Micale, V.; Perdichizzi, F.; Basciano, Giovanni

doi:10.1016/0044-8486(95)01179-x

Cited by 45 publications

(38 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to its increasing importance as a new aquaculture species in the Mediterranean, many scientists are interested in its reproduction and physiology (Micale et al, 1996;Hernandez et al, 2003;Pajuela et al, 2008), skeletal anomalies (Favaloro and Mazzola, 2000;Boglione et al, 2003b;), morphology (Loy et al, 2000;Mazzola, 2000, 2003), nutrition and growth (Hernandez et al, 2001;Atienza et al, 2004;Suzer et al, 2007). However, literature about its early life history is scarce or limited to embryonic and larvae development in rearing conditions (Boglione et al, 2003a;Korkut et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Untitled

Çoban¹,

Suzer²,

Yıldırım³

et al. 2012

Turk. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

In this study, morphological development and allometric growth were investigated in the sharpsnout seabream, Diplodus puntazzo, during larval development until the end of the weaning on day 42. Average total length (TL) of newly hatched larvae was 2.91±0.11 mm and it was 3.35±0.13 mm TL at the onset of feeding at 4 days after hatching (DAH). Initial swimbladder inflation occurred at 10 DAH (5.11±0.45 mm TL) and post-inflation became more elongate at 15 DAH (5.95±0.43 mm TL). The notochord flexion occurred between 5.95±0.43 mm TL at 15 DAH and 7.98±0.72 mm TL on 24 DAH. At the end of weaning, larvae were 16.03±1.74 mm TL at 42 DAH. The majority of all allometric changes from inflection point were integrated with the larval and the metamorphosis stage. Inflections in body proportion changes occurred mainly at 5.12, 5.95 and 7.98 mm TL, corresponding to initial swimbladder inflation and flexion period of notochord, respectively.Keywords: Sharpsnout seabream, Diplodus puntazzo, larval rearing, allometry, ontogeny. Sivriburun Karagöz (Diplodus puntazzo) Larvalarında Morofolojik Gelişim ve Allometrik Büyüme ÖzetBu çalışmada, sivriburun karagöz (Diplodus puntazzo) larvalarında morfolojik gelişim ve allometrik büyüme siyumurtadan çıkıştan itibaren 42. güne kadar incelenmiştir. Yumurtadan yeni çıkmış larvada toplam boy (TB) 2,91±0,11 mm olmuş ve yumurtadan çıktıktan sonraki 4. günde 3,35±0,13 mm TB'da dışarıdan canlı yem ile besleme başlamıştır. Hava kesesi ilk şişmesi yumurtadan çıktıktan sonraki 10. günde 5,11±0,45 mm TB'da gözlenmiş olup, ikinci şişme 15. günde 5,95±0,43 mm TB'da meydana gelmiştir. Notokordanın küçük bir açıyla bükülmeye başlaması 15 ile 24. günlerde 5,95±0,43 mm TB ile 7,98±0,72 mm TB arasında meydana gelmiştir. Denemenin sonunda 42. günde larva 16,03±1,74 mm TB'da olmuştur. Kırılma noktaları ile ortaya çıkan tüm allometrik değişimler larval dönem ve metemorfoz gelişim safhaları ile ilişkilendirildi Vücut bölgelerinin toplam boya oranına bağlı ortaya çıkan kırılma noktaları daha çok 5,12, 5,95 ve 7,98 mm TB'da meydana gelirken bu değerlerde hava kesesi şişmesi ve notokorda bükülmesi gerçekleşmektedir.Anahtar Kelimeler: Sivriburun Karagöz, Diplodus puntazzo, larval yetiştiricilik, allometri, ontogeni.

show abstract

Section: Introductionmentioning

confidence: 99%

Untitled

Çoban¹,

Suzer²,

Yıldırım³

et al. 2012

Turk. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

show abstract

“…It is an omnivore feeding on seaweeds, worms, molluscs and shrimps [25]. In the Mediterranean Sea, spawning takes place during September-November, when water temperature ranges between 20 and 23 °C [22,26]. These fish are considered to have very tasty meat and are generally appreciated.…”

Section: Introductionmentioning

confidence: 99%

Digestive Enzymes in Larvae and Juveniles of Farmed Sharpsnout Seabream (Diplodus puntazzo) (Cetti, 1777)

Savona¹

2011

TOMBJ

View full text Add to dashboard Cite

Abstract:The ontogenetic development and pattern of main digestive enzyme activities (proteases, carbohydrases and lipases) were investigated in farmed sharpsnout seabream Diplodus puntazzo larvae and juveniles, during the passage from the larval stage to adult (from 21 to 277 days after hatching -DAH). Larvae showed exponential growth, thus confirming that Rotifers and Artemia nauplii are suitable preys for early feeding of D. puntazzo larvae.Pepsin activity was low in the larvae, but it increased afterwards in relation with stomach development. In juveniles, levels of specific activity of trypsin, chymotrypsin and elastase were lower compared to that recorded in larvae. A decrease in the activity of the alkaline proteases could be related to an increase in the functionality of stomach. Qualitative and quantitative assay of glycosidases ( -amylase, cellulase and maltase) showed high glycosidase activity, indicating that D. puntazzo is capable of digesting carbohydrates in its diet. Levels of lipase activity in juveniles were higher than those found in larvae. Our results didn't show an inductive character of lipases, since in juveniles the activity levels were almost constant even if the fat content of compound diet varied (from 7.0 % to 20 %).The rapid changes in the digestive activities of D. puntazzo larvae supported the existence of well established induction and regulation digestive mechanisms. Present results also confirm that D. puntazzo larvae have complete digestive enzymatic equipment that increased during larval ontogeny and enable larvae to digest and absorb nutrients contained in live preys once exogenous feeding occurred. The enzymatic pattern is correlated with omnivorous feeding habits of the species. Moreover, the patterns of activity of the main digestive enzymes of D. puntazzo larvae and juveniles indicated the early functional development of their digestive system and suggested this species as a good candidate for Mediterranean aquaculture using the compound diet.

show abstract

“…From the 1980s, experiments have been undertaken to the different aspects of its cultivation: for example, studies into its reproduction (Faranda et al 1985;Greco et al 1993;Georgiou and Stephanou 1995;Micale et al 1996); larva culture (Franicevic 1989;Greco et al 1993;Marangos 1995;Pastor et al 2000;Papandroulakis et al 2004;Lahnsteiner and Patarnello 2005); intensive ongrowing in floating cages (Bermúdez et al 1989;Gatland 1995) and tanks (Faranda, et al 1983;Divanach et al 1993;Abellán and García-Alcazar 1995;, 2007bKarakatsouli et al 2006); feeding and nutrition (Hernández et al , 2003Egea et al 2002;Rondán et al 2004a, b;Torrejón Atienza et al 2004;Vivas et al 2006;Almaida-Pagan et al 2007;Piedacausa et al 2007); physiological aspects of interest for cultivation (Cerezo Valverde and García García 2004;Vera et al 2006); nutritional quality of cultivated fish Orban et al 2000); sensorial evaluation and consumer acceptance García García et al 2007a); and pathology (Athanassopoulou et al 1999;Padrós et al 2001). Small-scale commercial operations (50-150 tonnes) have taken place in some Mediterranean countries, particularly Italy, where the use of reproducers born in captivity and hatchery-born juveniles do not seem to be source of any great difficulty.…”

Section: Introductionmentioning

confidence: 99%

“…These include (a) the natural period of egglaying (October-December) (Faranda et al 1985;Micale et al 1996;Hernández et al 2003), which is earlier than in gilthead sea bream (January-March) and sea bass (February-March), which optimises hatchery use (Marangos 1995); (b) its hermaphrodite state with bisexual gonads showing early differentiation and giving rise to approximately equal proportions of males and females, which mature naturally (Micale et al 1996;Hernández et al 2003); (c) the techniques used in larva culture are similar to those used for gilthead sea bream (Marangos 1995), and are easily obtained high larval survival (Pastor et al 2000); (d) growth during ongrowing is similar to gilthead sea bream and the same feed can be used with good results (Bermúdez et al 1989;. In contrast, unlike gilthead sea bream, it does not bite through the nets, instead helping to keep them clean by nibbling any adhering algae (Gatland 1995); it is omnivorous (Sala and Ballesteros 1997), protein of a vegetal origin forming a great part of its natural diet (Mena Sellés and .…”

Section: Introductionmentioning

confidence: 99%

Econometric model of viability/profitability of ongrowing sharp snout sea bream (Diplodus puntazzo) in sea cages

García¹,

García²

2010

Aquacult Int

View full text Add to dashboard Cite

We have designed and evaluated an ongrowing plant in sea cages as representative of Spanish Mediterranean exploitations with an annual production of 1,000 tonnes, based on the technology already in use for Sparus aurata ongrowing but taking into consideration the zootechnical variables for this species. We used the cost analysis and once defined the accounting structure, and we have used mathematical modelling or econometric to establish indicators of viability/profitability (NPV/IRR) based on the variables chosen for their economic importance in the sensitivity analysis. The highest costs and therefore of greatest economic importance are feed (43.85%) and juveniles (25.04%). The costs analysis points to a profitable business activity, but with a relatively low profitability (benefit/total cost = 7.26%) although benefit/investment is slightly better (15.29%). The break even point suggests that the business will only be viable above a selling price of € 3.69/kg and a production minimum of 709,363 kg/year. The feeding price threshold indicates that the activity is viable up to a cost of € 1.85/kg, which is within the range of sensitivity, while the cost of juvenile threshold (€ 1.17/kg) is much above this range. This underlines the great sensitivity of the activity to feeding costs, although the cost of the juveniles is not so important in this respect. When significant production levels have been reached, it is feasible that the cost of feeding will decrease since the species uses protein of vegetal origin efficiently, especially soy flour. If the minimum selling price is fixed at € 4.21/kg, the cost of feed is 11% lower and the IRR will reach 13.12%, which is an attractive alternative for investors. The econometric model is therefore a very useful tool for evaluating the viability or profitability of new species.

show abstract

Aspects of the reproductive biology of the sharpsnout seabream Diplodus puntazzo (Cetti, 1777). I. Gametogenesis and gonadal cycle in captivity during the third year of life

Cited by 45 publications

References 8 publications

Untitled

Untitled

Digestive Enzymes in Larvae and Juveniles of Farmed Sharpsnout Seabream (Diplodus puntazzo) (Cetti, 1777)

Econometric model of viability/profitability of ongrowing sharp snout sea bream (Diplodus puntazzo) in sea cages

Contact Info

Product

Resources

About