Catching Performance and Catching Efficiency of Siliconized Baits in Handline Fishery

The present study investigated the catching performance and catching efficiency of natural mud shrimp (alive) (Upogebia pusilla), siliconized mud shrimp and siliconized pellet in handline fishing. The trials were performed in Kiyikislacik Village of Mugla province. The main body of the handline is empty set 0.50 mm, leader and snood are empty set 0.27-0.30 mm, the snood length and distance are 10 cm and 20 cm, respectively. Each handline has 3 hooks and the hook type is 4 no straight. Catches from natural mud shrimp, siliconized shrimp and siliconized pellet bait retained separately, sorted by species and weighed as. 0.01 g sensitivity and measured as the total length. Totally 590 individuals from 30 different species in total were caught including; 28 bony fish (93.33%), and 2 cephalopods (0.66%). While natural mud shrimp captured the 50.7% of fish, 44.7% and 4.6% were caught with siliconized mud shrimp and siliconized pellet, respectively. CPUE values of natural mud shrimp, siliconized shrimp and silicon pellet were calculated as 1.57 n/h, 1.38 n/h and 0.14 n/h, respectively. In addition, YPUE values were determined as 121.84 g/ h, 137.73 g/h and 7.62 g/h for natural mud shrimp, siliconized shrimp and silicon pellet, respectively. Despite the fact that the number of individuals that a live mud shrimp catch in a unit of time is high, it was found out that the weight is more in a unit of time when silicone mud shrimp is used. It was concluded that using of siliconized mud shrimp has a high capacity of catching performance and catching efficiency and can be used as bait when natural mud shrimp cannot be utilized as alive or unable to be supplied, due to the weather conditions and time restrictions.Ege University Scientific Research Projects Fund (BAP Project) [2015/SUF/025]; Scientific and Technological Research Council of Turkey [TOVAG 215O241]The present study was sponsored by the Ege University Scientific Research Projects Fund (BAP Project No: 2015/SUF/025) and the Scientific and Technological Research Council of Turkey (Project No: TOVAG 215O241). We would like to thank both institutions for their support

Growth and reproduction of the Mediterranean mud shrimp Upogebia pusilla (Petagna, 1792) in the central Aegean Sea, Turkey

WOS: 000545767000001The aim of this study was to determine the growth and reproduction characteristics of Upogebia pusilla in the central Aegean Sea. This species is widely used by the commercial and amateur bait fisheries in Turkey. A total of 1949 U. pusilla individuals were taken from Izmir Bay between April 2014 and March 2015. Their total length ranged between 16.96 and 80.32 mm (6.51 and 26.56 mm CL) with a mean value +/- SE of 52.41 +/- 0.25 mm (17.54 +/- 0.08 mm CL). the female:male ratio was 1:0.99 (P > 0.05) and males can grow larger than females. For all individuals, the equations CL = 0.317 x TL + 0.951 (R-2 = 0.962) and W = 0.015 x TL3.11 (R-2 = 0.978) described the total length-carapace length and total length-total weight relatioships, respectively. the Von Bertalanffy growth equation for females was CLt = 26.08 x (1 - e(-0.487 x (t + 0.0048))) (phi' = 2.52), while for males it was CLt = 29.12 x (1 - e(-0.424 x (t + 0.0053))) (phi' = 2.56). the relationship between the fecundity and the total length was found to be F = 6.654 x 10(-7) x TL(3.9)0 (R-2 = 0.919). Spawning occurred at three different seasons: between February and April, in June, and in August. the relationship between the total length and sexual maturity was found to be PL = Phi x (-11.449 + 0.288 x TL) (R-2 = 0.926) for females, while it was P-L = Phi x (-10.399 + 0.191 x TL) (R-2 = 0.878) for males. First maturity lengths were estimated as 50.11 mm for females and 54.54 mm for males, and the first reproduction age for both sexes was found to be II+

THE PRESENCE of ALPHEUS LOBIDENS de HAAN, 1849 (DECAPODA, ALPHEIDAE) on the Turkish AEGEAN SEA COAST

A male specimen of Alpheus lobidens De Haan, 1849 was collected on the Aegean coast of Turkey. It is the second Lessepsian species belonging to the genus Alpheus from the Turkish coast of the Aegean Sea. © Koninklijke Brill NV, Leiden, 2015

THE PRESENCE OF ALPHEUS LOBIDENS DE HAAN, 1849 (DECAPODA, ALPHEIDAE) ON THE TURKISH AEGEAN SEA COAST

WOS: 000357621600003A male specimen of Alpheus lobidens De Haan, 1849 was collected on the Aegean coast of Turkey. It is the second Lessepsian species belonging to the genus Alpheus from the Turkish coast of the Aegean Sea

Manipulating spectral properties of the Hg (II) sensitive carbazole-oxadiazole derivative by silver nanoparticles: Two different sensing mechanisms for the same probe

In this work, a newly synthesized fluorescent probe was used along with silver nanoparticles (AgNPs) for selective sensing of the sub-nanomolar concentrations of ionic mercury. We offered two different sensing mechanisms for the same probe manipulating its spectral properties by additives. The convenient sensing mechanism was relying on the quenching-based interaction of Hg (II) with the fluoroionophore in plasticized PMMA matrix at a certain wavelength. The second way relies on nanoscale chemistry of the silver and following formation of Ag-Hg solid amalgams on the surface of the sensing materials. The silver-equipped optodes allowed the ratiometric determination of Hg (II) in the working range of 1.0 x 10- 12-1.0 x 10-3 M with a detection limit of 3.9 10-14 and 7.9 10-14 M for the AgNP equipped electrospun fibers and thin films, respectively. The sensor exhibited excellent selectivity for the Hg (II) with respect to the convenient alkali, alkaline earth, and transition metal ions. In addition to the extraordinary sensitivity and selectivity, the dye exhibited high fluorescence quantum yield, long excitation, and emission wavelength, and high Stokes' shifts in the solid matrix which makes it compatible with solid-state optics including fiber optics and LEDs

An emission based optical CO2 sensor fabricated on grating-like TiO2 substrates using HPTS

TiO2 is a widely used material in various applications, including photo-catalysis, sensing, and dye-sensitized solar cells. In this work, we presented a stable and sensitive CO2 sensor working on principle of emission signals of the HPTS dye immobilized on TiO2 substrates whose effective refractive indices in the parallel and perpendicular grating orientations evidenced earlier. The HPTS exhibited 8.4-fold enhanced emission signal on the offered substrates with respect to the previously reported intensities recorded for the polymeric supports. The emission peaks of the HPTS exhibited CO2 induced intensity quenching when excited at 466 nm. Calibration sensitivity of the offered composites has been tested exposing the sensor materials to varying concentrations of the CO2 between 0.0 and 100.0 % pCO2 and correlating the measured fluorescence intensity with the corresponding CO2 levels. The dye revealed enhanced CO2 induced response exhibiting the I0/100 values of 11.9, 13.3, 11.2 and 6.5. We also recorded bi-exponential excited state lifetimes for the HPTS on four different test materials both in the absence and presence of the CO2. The emission based variations were followed as the analytical signal due to higher CO2-induced relative signal changes than that of the lifetime based variations. Herein we used the ion pair form of the HPTS in a protective chemical microenvironment and obtained considerable long term stability extending to16 mounts which can be attributed to the presence of the 1-butyl-3-methylimidazolium tetrafluoroborate as an internal buffering system in the sensing composition as well as the inert and robust structure of the substrate. The extremely high optical response, advantage of excitation with blue LEDs and long-term stability observed on grating-like TiO2 surfaces make the proposed system a promising design for the quantification of CO2 for further applications

Enhanced luminescence of a silica‐nitride phosphor; La3Si6N11:Ce3+by using Cr3+‐activated TiO2 nanoparticles

Abstract Ce3+‐activated silica nitride phosphors (lanthanum silicate‐nitride [LSN]) are promising thermostable conversion components for white‐light‐emitting diodes, screen technologies, and other optoelectronic applications. Cr3+‐activated TiO2, on the other hand, is a strongly absorbing material depending on its size and optical microenvironment. In this work, we gathered Cr3+‐doped TiO2 and La3Si6N11:Ce3+ in an optically transparent polymethylmethacrylate matrix. Photoluminescence of the binary blends of La3Si6N11:Ce3+/TiO2 and La3Si6N11:Ce3+/TiO2:Cr3+ has been investigated under two different excitation energies by steady‐state and lifetime‐based measurements, respectively. When the microscale La3Si6N11:Ce3+ phosphor and nanoscale TiO2:Cr3+ particles were gathered at a critical concentration, the resulting composite exhibited 3.14‐fold enhancement in the emission signal intensity with respect to the additive‐free phosphor. Upon excitation, the La3Si6N11:Ce3+–TiO2:Cr3+ blend exhibited different excited‐state lifetimes for the nano‐ and microsecond time‐scales compared to the LSN. The microsecond time‐scale measurements performed under 378 nm excitation supported the existence of a potential energy transfer from the TiO2:Cr3+ to the La3Si6N11:Ce3+