From Fertilisation to the End of Metamorphosis—Functional Development

Kjørsvik, Elin; Pittman, Karin; Павлов, Д. С.

doi:10.1002/9780470995617.ch6

Cited by 55 publications

(73 citation statements)

References 123 publications

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“…Larval nutritional requirement is connected to digestion of proteins and digestive physiology. Furthermore, it is well known that competence at searching and assimilating food prior to depletion of the endogenous energy source of the yolk-sac is crucial for the survival of marine fish larvae (Kjørsvik et al, 2004;Sveinsdóttir et al, 2006;Kamler, 2008). The important role of different temperatures in yolk utilization results in different ontogenic developmental process of morphological properties and behavioral patterns in the cultured species (Fukuhara, 1990).…”

Section: Discussionmentioning

confidence: 99%

Untitled

Çoban¹,

Suzer²,

Yıldırım³

et al. 2012

Turk. J. Fish. Aquat. Sci.

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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.

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Section: Discussionmentioning

confidence: 99%

Untitled

Çoban¹,

Suzer²,

Yıldırım³

et al. 2012

Turk. J. Fish. Aquat. Sci.

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“…The pituitary gland may occur a few days after hatch in some species, but the three parts of the pituitary (pars distalis, pars intermedia and neurophysis) generally develop by the end of yolk absorption, concomitant with full eye pigmentation [4]. Thyroid follicles appear functional in some species at hatching, or even before, as in some salmonids [51], fathead minnow (Pimephales promelas) [51] and wolffish (A. lupus, A. minor) [6].…”

Section: The Yolk Sac Stage (Eleutheroembryonic Stage)mentioning

confidence: 98%

“…The myotomes are simple, segmental and V-shaped at hatch in most species and are made of protein molecules of the larval type [4]. Further myotomes may be added posteriorly during early growth and they act against the notochord to provide a hydrostatic skeleton.…”

Section: The Yolk Sac Stage (Eleutheroembryonic Stage)mentioning

confidence: 99%

Comparative organ differentiation during early life stages of marine fish

2005

Fish & Shellfish Immunology

139

121

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“…The pancreas with undifferentiated rounded cells became more evident between digestive tract and yolk-sac and then pancreas was clearly distinguishable on 2-3 DAH in common dentex, Dentex dentex larvae (Santamaria et al, 2004). Additionally, it is further extended during metamorphosis, trypsin and chymotrypsin activity is high and the folded intestine has aminopeptidaseactivity (Kjørsvik et al, 2004).…”

Section: Introductionmentioning

confidence: 81%

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Kamacı

Çoban²,

Suzer³

et al. 2010

Turk. J. Fish. Aquat. Sci.

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The ontogenesis and formation stages of exocrine pancreas in European sea bass (D. labrax) larvae were investigated from hatching to 40 days after hatching (DAH). Histological and enzymatical techniques were used to explain the functional development of the pancreas in D. labrax with the expression of trypsinogen activity. The incipient pancreas appeared as a lamination of the dorsal wall of the digestive tract. It was observed that the primary visible indication of exocrine cell differentiation was polarization. The first zymogen granules and pancreas with exocrine polyhedral cells appeared on 6 DAH and became abundant as a compact structure located dorsal and slightly posterior to the liver. At the same time, firstly, anus and then mouth were opened, and total lengths of larvae were determined as 3.47±0.26 mm. Until larval metamorphosis, the pancreas became diffuse, spreading throughout the mesentery enclosure, the stomach, the upper intestine and the pyloric caeca. On the other hand, zymogen granules were more numerous and larger, and a greater quantity of material was carried by the ducts, indicating an increased cellular activity. The specific activity of trypsin was determined as early as after hatching (42.54±6.8 mU/mg protein -1 ) at 4.28±0.2 mm total length of larvae and increased immediately during the following days especially after exogenous feeding. The highest tryptic activity was detected on 30 DAH as 122.45±11.76 mU/mg protein -1 . It is concluded that exocrine pancreas organogenesis is the main critical step of the zymogen granules and trypsin activity is present as early as after hatching and continuously increasing with larval period of D. labrax.Keywords: Dicentrarchus labrax, exocrine pancreas, histology, trypsin, ontogenesis, growth. Kültürü Yapılan Levrek (Dicentrarchus labrax) Larvalarında Ekzokrin Pankreas Gelişimi ve Tripsin Aktivitesi ÖzetBu çalışmada açılımdan 40. güne kadar levrek (D. labrax) larvalarında ekzokrin pankreasın ontogenik gelişimi ve oluşum aşamaları incelenmiştir. Levrek larvalarında pankreasın fonksiyonel gelişimi tanımlamak için histolojik ve tripsinojen aktivitesinin incelendiği enzimatik teknikler kullanılmıştır. İlk pankreas oluşumu sindirim tüpünün dorsal bölgesinde tabakalaşmış olarak izlenmiştir. Eksokrin hücre farklılaşmasının ilk işaretinin kutuplaşma olduğu gözlenmiştir. 6. günde ilk zimojen granülleri ve ekzokrine polihedarl hücreli pankreas karaciğerin posteiorunda ve dorsal bölgesinde konumlanmış yoğun bir oluşum olarak gözlenmiştir. Aynı zamanda, ilk olarak anüs sonrasında ağız açılmış ve larvaların total boyu 3,47±0,26 mm olarak tespit edilmiştir. Larval metamorfoza kadar, pankreas farklılaşmış ve midenin mesenterik bölgesinde, bağırsağın ve pilorik çekumun üst kısmında yayılmış olarak izlenir. Öte yandan, zimojen granüllerinin sayısının ve hacminin artması ve beraberinde taşınan içerik miktarının artışı hücresel aktivitede meydana gelen artışın açık bir göstergesidir. Tripsin aktivitesi açılımın hemen ardından (42,54±6,8 mU/mg protein -1 ) larva...

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From Fertilisation to the End of Metamorphosis—Functional Development

Cited by 55 publications

References 123 publications

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Comparative organ differentiation during early life stages of marine fish

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