Pyridinoline concentrations in muscular and skin collagen of fish and relationship between collagen solubility and pyridinoline concentration in fish muscular collagen     

Masashi Ando  Yoko Nakagishi  Keiko Yoshida  Masashi Nakao  Takayuki Nakagawa  Yasuo Makinodan  Yasuyuki Tsukamasa  Ken-Ichi Kawasaki 《Fisheries Science》2006,72(5):1104-1108

Pyridinoline (Pyr), one of the mature crosslinks of collagen, was determined in muscular collagen of three species of fish. The amounts of muscular Pyr in red sea bream, yellowtail, and tiger puffer were 3.4, 8.8, and 50.3 mmol/mol collagen, respectively, indicating that the Pyr concentration in muscular collagen differs greatly among fish species. The Pyr concentration in tiger puffer muscular collagen was the greatest, but it was only one-fourth that in rabbit muscle. As in mammalian skin collagen, Pyr was not detected in skin collagen of red sea bream and yellowtail. However, tiger puffer skin contained Pyr (3.75 mmol/mol collagen). The presence of Pyr would have a relationship to some features of tiger puffer skin, such as mechanical strength and thickness. Pyr concentrations in acid-soluble collagen (ASC), pepsin-solubilized collagen (PSC), and insoluble collagen (ISC) in muscles of three species of fish were determined. Pyr was found in ISC > PSC > ASC, from the highest to the lowest concentration, and the concentration in ISC was 45–200 times that in ASC. Therefore, Pyr crosslinks that are formed between collagen molecules would have a close relationship to collagen solubility.  相似文献   

Selection of spawning habitat by several gobiid fishes in the subtidal zone of a small temperate estuary     

Ryutei Inui  Norio Onikura  Motoyoshi Kawagishi  Masaya Nakatani  Yuta Tomiyama  Shin Oikawa 《Fisheries Science》2010,76(1):83-91

We examined the spawning sites of several gobiid fishes in the subtidal zone of a small temperate estuary and determined the relationship of the nest abundance of each species with several environmental conditions, including water temperature, salinity, median particle size, proportion of silt and clay, current width, maximum water depth, distance from each site to the river mouth, and density of objects (boulders, cobbles, empty oyster shells, and empty clam shells) in the water. During this study, we found 115 nests belonging to the following six species: Favonigobius gymnauchen, Tridentiger obscurus, Leucopsarion petersii, Acanthogobius lactipes, Rhinogobius giurinus, and Tridentiger trigonocephalus. Stepwise multiple regression analysis, which was used to determine the best model for the nest abundance of all species, revealed that the nest abundance of each species clearly increased with an increase in the density of spawning substrates, such as cobbles and bivalve shells. These results show that the density of spawning substrates is a crucial factor affecting the selection of spawning habitats by each species.  相似文献   

Inactivation of koi‐herpesvirus in water using bacteria isolated from carp intestines and carp habitats     

N Yoshida  R‐k Sasaki  H Kasai  M Yoshimizu 《Journal of fish diseases》2013,36(12):997-1005

Since its first outbreak in Japan in 2003, koi‐herpesvirus (KHV) remains a challenge to the carp Cyprinus carpio L. breeding industry. In this study, inactivation of KHV in water from carp habitats (carp habitat water) was investigated with the aim of developing a model for rapidly inactivating the pathogen in aquaculture effluent. Experiments with live fish showed that, in carp habitat water, KHV lost its infectivity within 3 days. Indications were that inactivation of KHV was caused by the antagonistic activity of bacteria (anti‐KHV bacteria) in the water from carp habitats. Carp habitat water and the intestinal contents of carp were therefore screened for anti‐KHV bacteria. Of 581 bacterial isolates, 23 showed anti‐KHV activity. An effluent treatment model for the disinfection of KHV in aquaculture effluent water using anti‐KHV bacteria was developed and evaluated. The model showed a decrease in cumulative mortality and in the number of KHV genome copies in kidney tissue of fish injected with treated effluent compared with a positive control. It is thought that anti‐KHV bacteria isolated from the intestinal contents of carp and from carp habitat water can be used to control KHV outbreaks.  相似文献   

基于WOS和CNKI数据库解析国际山羊研究发展态势     

何礼邦  曹华娟  毕谊  杨钰塔  陈宏  蓝贤勇 《中国草食动物科学》2021,(2):59-66

为了解国际山羊整体发展态势,运用引文分析方法,以"山羊"为标题词进行检索,对1992—2019年期间Web of Science数据库中全球有关山羊研究论文产出,以及同一时期中国CNKI数据库中中文有关山羊研究重点论文产出,进行了国、内外山羊研究论文全面解析.通过Web of Science平台共检索到SCI山羊论文1...  相似文献   

Surgical outcomes in dogs with tracheal collapse treated with a novel cross-and-hook braided endoluminal stent     

Akiko Uemura  Yusuke Ozai  Lina Hamabe  Tomohiko Yoshida  Ryou Tanaka 《Journal of veterinary science (Suw?n-si, Korea)》2022,23(3)

BackgroundStenting is an effective treatment option for tracheal collapse in dogs. Cross-braided tracheal stents are currently the norm in veterinary medicine, but cross-and-hook braided stents have recently been adopted in human medicine. We examined whether stents manufactured using this novel braiding technique provided additional advantages for the treatment of tracheal collapse in dogs.ObjectivesTo evaluate the outcomes of cross-and-hook braided stent implantation in the treatment of tracheal collapse in dogs.MethodsThe medical records of 22 client-owned dogs that underwent luminal placement of cross-and-hook braided Fauna Stents for the treatment of tracheal collapse between January 2018 and July 2021 were examined and data on canine signalment, clinical signs, diagnostic test results, surgical outcomes, and postoperative complications were retrieved and analyzed statistically.ResultsTwenty-six stents were surgically implanted, with 20 dogs (90.9%) receiving one stent and the remaining two (9.1%) receiving two or more stents. All dogs survived the procedure. The median survival time at a median follow-up of 990 days was 879 days. At the final follow-up examination, loss or mild improvement of cough was observed in all dogs.ConclusionsCompared with conventional lumen stents, the cross-and-hook braided Fauna Stent offered a higher survival rate and improved clinical symptoms in all patients. The results of this study suggest that the Fauna Stent may be a promising treatment option for dogs with tracheal collapse.  相似文献   

Age and growth of red tilefish Branchiostegus japonicus in two fishery grounds off the Kaetsu region,Niigata Prefecture,northern Sea of Japan     

Iseki  Tomoaki  Yagi  Yuta  Uehara  Shinji  Kajihara  Naoto  Fujii  Tetsuo 《Fisheries Science》2022,88(6):667-676

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