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Öğe Allometric Growth in Serpae Tetra (Hyphessobrycon serpae) Larvae(Medwell Online, 2011) Celik, Pinar; Cirik, SukranWe describe the allometric growth patterns of Hyphessobrycon serpae (Serpae tetra) larvae raised under aquarium conditions from hatch to day 30 (metamorphosis). Allometric growth patterns of some morphometric characters (total length, head length, trunk length, tail length, body depth, pre-anal myomer length, post-anal myomer length, pre-anal length, eye diameter and snout length) were modeled by a power function and were described by the growth coefficient.Öğe Early Weaning of Discus Symphysodon spp. Larvae: Histological and Morphological Observations(Israeli Journal Of Aquaculture-Bamidgeh, 2011) Celik, Ihsan; Onal, Umur; Cirik, Sukran; Duman, Canan; Ingin, Tuncay; Celik, PinarTo determine the optimal timing for weaning discus (Symphysodon spp.), larvae were fed a control diet of 100% Artemia, or weaned onto a micro-ground diet on day 18, 23, or 28 after hatching, until 45 days after hatching. During the first 14 days, the development of the digestive tract was studied to determine key events in the early ontogeny of discus larvae. There were significant (p<0.05) differences among treatments in the growth of the larvae. The highest weight increase was observed in the control group but good growth was also obtained when the larvae were weaned to dry feed 28 days after hatching. The specific growth rate (SGR) was 6.0 +/- 0.19 in the control group and 0.4 +/- 0.239, 2.0 +/- 0.257, and 5.2 +/- 0.382 in the 18, 23, and 28 day groups, respectively. Mean survival in all treatments was 56.25% with no significant differences among treatments.Öğe Effect of Lunar Synchronization on the Reproduction Time of Discus Fish (Symphysodon sp.) Under Controlled Aquarium Conditions(Medwell Online, 2011) Celik, Pinar; Celik, IhsanThe reproduction times of the discus fish were observed for 2 years under fully-controlled production conditions. The position of the moon was also recorded on the spawning day of the fish at a light photoperiod of 14 h and a dark photoperiod of 10 h with water quality parameters of 27-30 degrees C, pH 4.5-6.5 and conductivity of 80-200 mu S. Of 102 observed reproductions, 28 occurred at the first quarter of the moon, 28 at full moon, 40 at the last quarter and 6 at new moon. Accordingly, it has been concluded that the discus fish display a reproduction behavior according to the lunar cycle even indoors, although they do not receive direct moonlight.Öğe Effect of Orally-Administered 17?-Methyltestosterone at Different Doses on the Sex Reversal of the Nile Tilapia (Oreochromis niloticus, Linneaus 1758)(Medwell Online, 2011) Celik, Ihsan; Guner, Yusuf; Celik, PinarIn order to obtain all male population, the Nile tilapia (Oreochromis niloticus) larvae which just finished the yolk sac were fed with feed containing 17 alpha-Methyltestosterone at five different doses (0, 20, 30, 40, 50 and 60 mgMT kg(-1) feed) for 28 days. As a result of the experiment repeated twice, it was found out that the sex reversal rates among the groups were at the levels of 57.1, 69.8, 69.4, 70.9, 86.1 and 93.7%, respectively. Furthermore, it was observed that the highest sex reversal rate occurred in the group to which 60 mgMT kg(-1) feed dose was applied.Öğe EFFECT OF WEANING TIME ON GROWTH AND SURVIVAL OF FRESHWATER ANGELFISH LARVAE (PTEROPHYLLUM SCALARE SCHULTZE, 1823)(Parlar Scientific Publications (P S P), 2020) Celik, PinarThe study was carried out to determine the most convenient time and effect of weaning on the growth and survival rate of Pterophyllum scalare larvae. Accordingly, the transition from live feed to microparticulate feed was experimented at 15th, 20th, 25th, 30th days after hatching and jointly fed with both feeds during 3 days after the last day of groups. After 3-day cooperatively feeding, larvae were fed only with microparticulate feed and the experiment lasted 40 days. Live weight and total length were measured at 15th, 25th, 32nd and 40th days and survival rates were calculated. As a result, a significant difference (P<0.05) was found between W15 and the other three groups for larval survival rates whereas there was no statistical difference between W20, W25 and W30 groups. The survival rates were found as 55.7 +/- 16.3%, 93.74 +/- 3.5%, 97.13 +/- 1.65% and 95.10 +/- 1.0%, respectively. There was no statistical difference between the groups in terms of live weight. While there was no significant difference between the groups W15, W20 and W25 in terms of total length, the group W30 was statistically different (P<0.05) from the groups W20 and W25. It was concluded that the best growth in terms of total length was observed in the group W30 (18.49 +/- 0.45mm).Öğe Embryonic and larval development of black skirt tetra (Gymnocorymbus ternetzi, Boulenger, 1895) under laboratory conditions(Wiley, 2012) Celik, Ihsan; Celik, Pinar; Cirik, Sukran; Gurkan, Mert; Hayretdag, SibelThe embryonic and larval development of black skirt tetra, Gymnocorymbus ternetzi, are described under controlled laboratory conditions. In addition, major histomorphological changes and the allometric growth patterns during larval development have been described. The laboratory-reared broodstock, that is 1 similar to year of age, were spawned. Hatching occurred 2021 similar to h after spawning at 24 +/- 0.5 degrees C. The cleavage was finished in 2 similar to h and the early blastula stage occurred at 2:04 hours after spawning. The gastrulation started at 3:20 similar to hours and 30% epiboly was observed at 3:34 similar to hours after spawning. Eight-somite stage was observed at 08:33 hours. And embryonic developmental stage was completed at 21 similar to h after spawning. The newly hatched larvae were 1442 +/- 14.3 similar to mu m in mean total length (TL). The mouth opened at 3 days after hatching (DAH). The yolk sac had been totally absorbed and the larvae started to swim actively within 34 similar to days. Notochord flexion began at 11 DAH. The metamorphosis was completed and the larvae transformed into juveniles at 32 DAH. In this paper, the full developmental sequence from egg to juvenile of G. ternetzi is described for the first time.Öğe Embryonic and larval development of serpae tetra Hyphessobrycon eques (Steindachner, 1882)(Wiley, 2020) Celik, Pinar; Cirik, SukranIn this study, the embryonic and larval development stages of one of the most important ornamental fish serpae tetra (Hyphessobrycon eques) are described. The early life stage is documented from fertilization until the beginning of the juvenile period. The fertilized eggs (the average diameter = 938.55 +/- 35.20 mu m) were incubated at a water temperature of 26 +/- 0.5 degrees C. The cleavage finished in 1:10 hr (=h) and the early blastula stage occurred at 1:26 hr post fertilization (hpf). The gastrulation started at 3:05 hpf, and 50% epiboly was observed at 3:25 hpf. Segmentation stage was monitored at 7:26 hpf. Embryonic developmental stage was completed and hatching occurred 20-21 hpf. The total length (TL) of newly hatched larvae was 2.64 +/- 0.21 mm. The larval development of serpae tetra was divided into four different periods: Yolk-sac larva (1-4 DAH, TL = 2.77 +/- 0.09 mm - 3.85 +/- 0.11 mm), preflexion larva (5-12 DAH), flexion larva (13-15 DAH, TL = 5.78 +/- 0.46 mm on the 15th day) and post-flexion larva (16-30 DAH, TL = 10.7 +/- 0.27 mm on the 28th-30th days). The mouth and anus are closed at 1 DAH. The mouth and anus opened at 4 DAH. Exogenous feeding started on the 4th day. The first gulping of the swim bladder was on days 3. The larva begins to swim freely, and the yolk sac was completely consumed at 4 DAH. Histological structures of the eye and brain of new hatched larva were clearly identified at 1 day after hatching (DAH). According to histological findings, the digestive system (stomach, intestine) started to develop and the liver could be seen on the ventral side of the swim bladder at 5 DAH. No histological difference was observed between the anterior intestine and the posterior intestine at 15-16 DAH. The larval metamorphosis was completed, and the larvae transformed into juveniles at 28-30 DAH.Öğe Embryonic Development of Black Neon Tetra Hyphessobrycon herbertaxelrodi Géry, 1961(Aquaculturehub Inc, 2023) Celik, Pinar; Celik, IhsanThe current study described the embryonic development stages of black neon tetra (Hyphessobrycon herbertaxelrodi), an economic ornamental fish. We characterized the stages of the zygote, cleavage, blastula, gastrula, segmentation, pharyngula, and hatching occurring during embryogenesis, which emphasizes changing spectrum of the main development processes from fertilization to incubation. The findings were put forth and photographed by examining live embryos under microscopy. Embryonic development of black neon tetra concluded at 24 +/- 0.5 degrees C water temperature at 20-21 hours. The first embryonic division occurs within the first 43 minutes after fertilization, and the process goes on to blastula at 02 hours and 28 minutes. The gastrula stage began at 02.57 hours, while 6 somite segmentation stages were observed to occur at 08.14 hours. Following the pharyngula stage seen between 17 to 20 hours, the hatching occurred at 20-21hours. The results of this study can provide significant benefits to professional breeders in the aquaculture of black neon tetra and other ornamental fish species.Öğe Growth performance of bath sponge (Spongia officinalis Linnaeus, 1759) farmed on suspended ropes in the Dardanelles (Turkey)(Wiley, 2011) Celik, Ihsan; Cirik, Sukran; Altinagac, Ugur; Ayaz, Adnan; Celik, Pinar; Tekesoglu, Haluk; Yilmaz, HarunCommercial bath sponge population in the Mediterranean has been recently reduced due to diseases and the depletion of natural banks. The commercial supply is far below the demand on the last 1015 years. In this study, we aimed to investigate the farming performance of Spongia officinalis in the Dardanelles. Sponges collected from the Dardanelles cut into pieces of different weight. They were divided into two groups depending on the wet weight ranging from 50 to 150 g (mean weight 102.6 +/- 4.81 g) and from 160 to 360 g (mean weight 235.8 +/- 8.56 g). Three rope systems located parallel to each other with 67 m inter-distance were constructed for the cultivation of sponges. At the end of the study, while small-sized sponges could reach mean wet weight of 120.7 +/- 14.8 g, large-sized sponges reached mean wet weight of 247.6 +/- 22.4 g. Growth rates were estimated 517% at 21st month. The survival rates were found 82% and 88%.Öğe Larval Development of The Freshwater Angelfish Pterophyllum scalare (Teleostei: Cichlidae)(Central Fisheries Research Inst, 2014) Celik, Ihsan; Celik, Pinar; Gurkan, Mert; Sahin, TolgaIn this study, the larval development of freshwater angelfish, Pterophyllum scalare, was described under controlled aquarium conditions. Major histomorphological changes and the allometric growth patterns during the larval development have been described. The larvae were obtained from three pairs of freshwater angelfish, which were maintained in glass tanks. The larvae were sampled for measurement and photography. They were observed under a stereomicroscope, photographed using a photomicrographic system. The larval development of angelfish were described from 1 days after hatching (DAH) to 24 DAH. Embryonic developmental stage was completed at day 3 after spawning at 24 +/- 1 degrees C. The newly hatched larvae had 4.24 +/- 0.28 mm total length (TL). The mouth opened at 3 DAH. The larvae started to swim actively within the next 3-4 days. Notochord flexion began at 3-4 DAH. The yolk sac has been totally absorbed at 6 DAH. The metamorphosis was completed and the larvae transformed into juveniles at 23-24 DAH.Öğe Validating daily otolith increment formation in young of the year pagellus acarne in the Çanakkale region(Arman Darya Inc, 2024) Ayyildiz, Hakan; Kurtkaya, Emre; Celik, Pinar; Altin, AytacAccurate age estimation is essential for population dynamics modeling and fisheries management. Otoliths serve as a critical resource for age determination in ichthyological studies, capitalizing on the embedded growth increments. The periodicity of these increments, however, requires thorough validation to confirm the accuracy of age assessments. This study validated daily increment deposition in sagittal otoliths of young-of-year Pagellus acarne from & Ccedil;anakkale, Turkey using Alizarin Red S (ARS), a fluorescent calcium-binding marker. Specimens (n=107; 1.8-4.7cm TL) were exposed to ARS concentrations of 0 (control), 50, 100, 150, 200, and 300mg/L for 24h, then reared 13 days. After a recovery period of 13 days, the second dyeing was performed with the aim of having a specific fluorescent mark to test the 13 rings found between the 2 fluorescent marks. Otoliths were examined under fluorescent microscopy. ARS marks were detectable in 81.57% of otoliths at >= 100mg/L, with the highest visibility at 300mg/L. Survival exceeded 84.2% across treatments. Increment counts between the first and second ARS marks (13 days) and from the second mark to the edge (20 days) matched elapsed time. Ages from wild fish (n=95) ranged 39-201 days with a growth rate of 0.176mm/day. This research demonstrates ARS is an effective, low-impact tool for periodicity validation and provides the basis for accurate age determination and population modeling of this ecologically important species in the region.Öğe Validation of Daily Growth Increment Deposition in Sagittal Otoliths of the Young of the Year Lithognathus mormyrus(Springer Int Publ Ag, 2024) Ayyildiz, Hakan; Kurtkaya, Emre; Celik, Pinar; Altin, Aytac; Bulut, MusaThis paper aims to validate the micro increment deposition in the sagittal otoliths of young of the year (YOY) Lithognathus mormyrus in the shallow waters of canakkale, Turkey. Wild YOY specimens of L. mormyrus were captured and reared to validate the daily micro increment formation in sagittal otoliths. The formation of daily sagittal micro increments was validated using by alizarin Red S (ARS), at a concentration of 0 (control), 50 mg/lt, 100 mg/lt, 150 mg/lt, 200 mg/lt and 300 mg/lt. The natural photoperiod was applied, and no food was given throughout the marking period. The tanks kept strongly aerated to maintain the pH similar to 7. YOY fish were kept in different aquariums for 17 days post-dyeing and then re-dyeing as before and kept alive for a further 20 days. ARS marks were clearly observed in 71.7% of the YOY L. mormyrus sagittal otoliths under a fluorescent microscope. However, no mark could be observed in any of the samples of 50 mg/lt ARS treatment. Chi2 tests revealed that the linear regressions of the number of micro increments between ARS marks against number of elapsed times was not statistically significant. This result showed that micro increment deposition on the sagitta were laid down daily under the experimental conditions and can be used to detect the daily age information for YOY L. mormyrus.
