Hydroponic horticulture using residual waters from Oreochromis niloticus aquaculture with biofloc technology in photoautotrophic conditions with Chlorella microalgae     

Yenitze E. Fimbres‐Acedo  Rosalía Servín‐Villegas  Rodolfo Garza‐Torres  Masato Endo  Kevin M. Fitzsimmons  Maurício G.C. Emerenciano  Paola Magalln‐Servín  Melissa Lpez‐Vela  Francisco J. Magalln‐Barajas 《Aquaculture Research》2020,51(10):4340-4360

Protein‐dependent aquaculture generates large amounts of nutrient‐rich residuals; a feasible way to develop sustainable production systems is to integrate Decoupled Aquaponic Systems (DAPS) with residual water bioprocesses, to combine Photoautotrophic Biofloc Technology (P‐BFT) aquaculture and hydroponic horticulture. This study describes the characteristics of residual water from Oreochromis niloticus aquaculture performed with P‐BFT inoculated with Chlorella microalgae, reared during the nursery (180 fish m³) and grow‐out (55 fish m³) phases. The experiment included five treatments: photoautotrophic BFT inoculated with Chlorella sp. (M), C. sorokiniana 2714 (CV), and C. sorokiniana 2805 (CS), and chemoautotrophic (Q) and heterotrophic (H) as controls. Elemental characteristics in liquid and solid residual fractions (15 macro‐ and micronutrients) were compared among treatments and against Hoagland & Arnon solution with hydroponics and used in Nutrient Film Technique (NFT) hydroponic horticulture including five plant species: lettuce (Lactuca sativa), pak‐choi (Brassica rapa subsp. chinensis), rocket (Eruca sativa), spinach (Spinacia oleracea) and basil (Ocimum basilicum). The physicochemical parameters were ideal for O. niloticus and plants. The relationship between N:P was ideal until weeks 16–22 in the photoautotrophic treatments, compared with hydroponic solutions. Micronutrient content was greater in the solid than a liquid fraction. The best BFT effluent regarding fish and plant growth was photoautotrophic treatments. Oreochromis niloticus BFT aquaculture in photoautotrophic mode using microalgae Chlorella inoculations provided residual water beneficial to hydroponic horticulture in DAPS located in coastal arid zones where freshwater is scarce, improving aquaculture performance and reusing water and nutrients.  相似文献   

First description and collection records of juvenile slime flounder <Emphasis Type="Italic">Microstomus achne</Emphasis> from the eastern and western coastal waters off Honshu Island,Japan     

Toshihiro Wada  Takashi Chiyokubo  Masato Aritaki 《Fisheries Science》2010,76(6):943-949

Morphological characteristics and body pigmentations of juvenile slime flounder Microstomus achne were described from one specimen [27.8 mm total length (TL)] collected off Niigata Prefecture from the Sea of Japan (35 m depth) in May 1993 and from three specimens (30.1, 36.2, and 40.9 mm TL) collected off Fukushima Prefecture on the Pacific coast of northern Japan (15 and 50 m depths) during April–May 2008 and 2009. These age-0 juveniles had a characteristically slenderly oval-shaped body and slightly protruded front nostrils. Sparsely distributed melanophores and xanthophores were clearly visible throughout the ocular side of one specimen, which was judged as a newly settled juvenile, whereas several spots aggregated by small melanophores were found in the others with elongated pectoral fins and small cycloid scales. Melanophores were only slightly detectable on the blind side. Comparisons of the depth distributions of slime flounder juveniles and sympatrically collected age-0 pleuronectids (Pseudopleuronectes herzensteini, Pseudopleuronectes yokohamae, Platichthys bicoloratus, and Dexistes rikuzenius) suggested that slime flounder can settle on broad nursery areas of coastal and offshore pleuronectid flatfishes, probably depending on local oceanic conditions during the protracted pelagic phase.  相似文献   

Augmentation and compatibility of Beauveria bassiana with pesticides against different growth stages of Bemisia tabaci (Gennadius); an in vitro and field approach     

David Wari  Ryo Okada  Motonori Takagi  Masato Yaguchi  Tetsuro Kashima  Takashi Ogawara 《Pest management science》2020,76(9):3236-3252

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Dual appearance of xanthophores,and ontogenetic changes in other pigment cells during early development of Japanese flounder <Emphasis Type="Italic">Paralichthys olivaceus</Emphasis>     

Mitsuo Nakamura  Tadahisa Seikai  Masato Aritaki  Reiji Masuda  Masaru Tanaka  Masatomo Tagawa 《Fisheries Science》2010,76(2):243-250

Flatfishes display a left–right asymmetry that is unique in the animal kingdom. In order to clarify the mechanisms of the asymmetrical development of pigment cells, changes in pigment cell densities were examined in Japanese flounder Paralichthys olivaceus. During development from symmetrical larvae to asymmetrical juveniles, pigment cell densities were monitored on the skin on both the left side (ocular side in juvenile; eventually has two eyes) and the right side (blind side in juvenile; eventually has no eyes). A symmetrical and constant decrease was observed in leucophores and larval type melanophores. A mostly symmetrical (slightly delayed on the blind side) and constant increase in iridophores from metamorphosis was observed. Adult-type melanophores appeared and then increased only after metamorphosis on the ocular side. However, the pattern of xanthophores was complicated: they first existed symmetrically and decreased symmetrically until metamorphosis, and they later increased only on the ocular side. The dual appearance of the xanthophores, as well as the differences between their depths and sizes on the ocular and blind sides, may suggest the presence of two types of xanthophores—just as melanophores are well known to exhibit two types. The ontogenetic study of pigment cells described here is likely to help to elucidate the process of abnormal pigmentation in flatfishes.  相似文献   

Effect of the lateral growth rate on wood properties in fast-growing hardwood species     

Miho Kojima  Hiroyuki Yamamoto  Kayo Okumura  Yasuhisa Ojio  Masato Yoshida  Takashi Okuyama  Toshihiro Ona  Kenji Matsune  Kentaro Nakamura  Yuji Ide  Sri Nugroho Marsoem  Mohd Hamami Sahri  Yusuf Sudo Hadi 《Journal of Wood Science》2009,55(6):417-424

We investigated the feasibility of using several fast-growing tropical or subtropical hardwood species for timber production by measuring key wood qualities in relationship to the high rates of lateral growth. The trees tested were sampled from even-aged plantations of Acacia mangium, A. auriculiformis, hybrid Acacia (A. mangium × A. auriculiformis), Eucalyptus grandis, E. globulus, and Paraserianthes falcataria (Solomon and Java origin) that had already reached commercial harvesting age. The released strain of the surface growth stress (RS), xylem density (XD), microfibril angle (MFA), and fiber length (FL) were measured at the outermost part of the xylem at breast height in each tree. Results were then compared to the lateral growth rate (radius/age) at breast height, which provides a relative indicator of the amount of tree growth per year. Our findings indicated that RS was constant, regardless of lateral growth rate in each species. Similar results were observed for XD, MFA, and FL, with a few exceptions, suggesting that high growth rates do not intrinsically affect the wood properties of fast-growing tropical or subtropical species that have reached harvesting age. However, special attention must be paid to patterns of xylem maturation when developing plantations of such species.  相似文献   

Effects of the lateral growth rate on wood quality parameters of Eucalyptus grandis from different latitudes in Brazil and Argentina     

Miho Kojima  Fabio Minoru Yamaji  Hiroyuki Yamamoto  Masato Yoshida  Takahisa Nakai 《Forest Ecology and Management》2009

Climate change resulting from increased atmospheric carbon dioxide (CO₂) and shortages of fossil fuels such as petroleum are major problems worldwide. Under these conditions, demand for woody biomass resources is increasing. We investigated the feasibility of using fast-growing Eucalyptus grandis for material production. Samples of E. grandis were collected from four plantations in different latitude divisions, including tropical and subtropical Brazil and subtropical Argentina. Various xylem qualities were measured and related to the lateral growth rate. Lateral growth rate did not significantly affect the longitudinal released strain of the surface growth stresses or the xylem density at any of the sampling sites. Higher lateral growth rate, higher values of xylem density, and lower absolute values of the released strain were observed in plantations closer to the equator. Higher growth rates in tropical climate promote longer fiber length. In subtropical plantations, smaller diameter trees will produce tension wood with smaller microfibril angles. Planting E. grandis closer to the equator thus produces higher quality wood than in plantations at lower latitudes.  相似文献   

Morphological observation of Toxocara vitulorum found in Japanese calves.     

N Taira  J Fujita 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(3):409-413

Between 1982 and 1988, ascarid nematodes were found in the feces of Japanese calves in Kyushu and Okinawa districts. Seven males and 21 females of the ascarids were observed morphologically for identification of species. Male and female ascarids were 15.64 (14.0-18.0) cm and 25.75 (16.5-34.0) cm in average length, respectively. Eggs were 81.6 microns and 71.8 microns in large and small diameters, respectively. The body of ascarids was translucent and soft. The boundary between the enlabium and prelabium of lip was clearly visible and the esophageal ventriculus was also observed. The vulva was situated at a distance of about 1/7 approximately 1/9 of body length from the anterior end of body. The surface of egg shell was relatively smooth, without rugose albuminous coat. These morphological features coincided with those of Toxocara vitulorum.  相似文献   

Number and density of retinal photoreceptor cells with emphasis on oil droplet distribution in the Mallard Duck (Anas platyrhynchos var. domesticus)     

Mohammad Lutfur RAHMAN  Masato AOYAMA  Shoei SUGITA 《Animal Science Journal》2007,78(6):639-649

This study was intended to determine the number and regional distribution of photoreceptor cells and different colored oil droplets in the retina of the Mallard Duck (Anas platyrhynchos var. domesticus). To estimate the number and density of photoreceptor cells, adult ducks were killed and both eyes were enucleated under deep anesthesia to prepare Nissl‐stained retinal whole‐mount samples. Different colored oil droplets were counted from color microphotographs of the freshly prepared retina. The mean number of retinal photoreceptors was approximately 6 308 828 ± 521 927, with a peak density of 33 573/mm² in the central retina. The density was similar in the nasal, temporal, ventral and dorsal areas of the retina. Five types of oil droplets were identified on the basis of color: red, orange, greenish‐yellow, yellow and clear. The mean density of oil droplets was highest in the central retina (17 639/mm²) and gradually declined towards the nasal, temporal, ventral and dorsal areas. The size of oil droplets gradually increased with retinal eccentricity and varied even within an area. The greenish‐yellow oil droplets were most abundant across the retina. Taken together, these results demonstrate the differential retinal distribution of photoreceptor cells and oil droplets in duck retina. We conclude that the area of high photoreceptor cell density, which is matched by high neuron densities of the ganglion cell layer, corresponds to the site of acute vision in duck retina.  相似文献   

Cloning of cDNAs encoding multiple subtypes of feline interferon-alpha from the feline epitherial cell line     

Nagai A  Taira O  Ishikawa M  Hiramatsu K  Hohdatsu T  Koyama H  Arai S  Sato H  Nakano K  Maehara N 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(6):725-728

Mammalian interferon (IFN)-alpha consists of a 23-amino acid signal peptide and a 166-amino acid mature protein. Feline (Fe) IFN-alpha has an extra unique molecule consisting of a 171-amino acid mature protein with a 5-amino acid insertion. We cloned eight new subtypes of cDNA encoding FeIFN- alpha from a feline epithelial cell line. Among all the FeIFN-alpha subtypes, including six that have previously been reported, the variations were found to be far less than those of IFN-alphas of other animals.  相似文献   

Magnetic resonance imaging of neuronal ceroid lipofuscinosis in a border collie     

Koie H  Shibuya H  Sato T  Sato A  Nawa K  Nawa Y  Kitagawa M  Sakai M  Takahashi T  Yamaya Y  Yamato O  Watari T  Tokuriki M 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(11):1453-1456

A castrated male border collie 23 months of age weighing 19.4 kg was referred to the Animal Medical Center of Nihon University with complaints of visual disturbance and behavioral abnormality, hyperacusis and morbid fear. The MRI examination revealed the slight dilated cerebral sulci and cerebellar fissures and left ventricular enlargement. This is the first report of MRI findings of canine neuronal ceroid lipofuscinosis.  相似文献