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Articles 1 - 30 of 37
Full-Text Articles in Life Sciences
Assessing The Vulnerability Of Fishery Villages Influenced By Climate Change And Anthropogenic Activity In The Coastal Zone Of The Tamsui River, Sheng-Yuan Teng, Ming-An Lee, Jhen Hsu, Tzu-Ping Lin, Yu-Chen Lin, Yi Chang
Assessing The Vulnerability Of Fishery Villages Influenced By Climate Change And Anthropogenic Activity In The Coastal Zone Of The Tamsui River, Sheng-Yuan Teng, Ming-An Lee, Jhen Hsu, Tzu-Ping Lin, Yu-Chen Lin, Yi Chang
Journal of Marine Science and Technology
Coastal zones located in populated and rapidly developing areas face high risks of natural and anthropogenic disasters. In this study, a framework was developed to determine the indicators of vulnerability to natural and anthropogenic disasters in Chuwei and Tamsui, two northern Taiwanese fishing villages in the coastal zone of the Tamsui River. The analytical hierarchy process (AHP) was used to determine the vulnerability indices of the locations, with experts evaluating the weights assigned to a range of criteria, namely hydrological data (such as sea surface temperature and sea level), stakeholder perceptions, and fishery data. These two villages have a considerably …
Predicting The Catch Potential Of Skipjack Tuna In The Western And Central Pacific Ocean Under Different Climate Change Scenarios, Kuo-Wei Yen, Nan-Jay Su, Tooreka Teemari, Min-An Lee, Hsueh-Jung Lu
Predicting The Catch Potential Of Skipjack Tuna In The Western And Central Pacific Ocean Under Different Climate Change Scenarios, Kuo-Wei Yen, Nan-Jay Su, Tooreka Teemari, Min-An Lee, Hsueh-Jung Lu
Journal of Marine Science and Technology
Skipjack tuna (Katsuwonus pelamis) constitute an important migratory species that contributes significantly to the economy and the global fishery industry. Skipjack tuna play a vital role in the marine ecosystem, particularly in tropical waters of the western and central Pacific Ocean (WCPO). However, climate change may affect the characteristics of fishery resources, leading to substantial reallocation and reduction of the biomass of this species in the WCPO. In this study, catch and effort data for skipjack tuna were collected from a purse seine fishery and subsequently analyzed in combination with remote-sensing environmental variables and simulation data from climate models under …
Assessment Of Landform Changes In Baramarae Tidal Flat, Korea Using Combined Analysis Of Multi-Temporal Remote Sensing Images And Grain Size Measurement Data, Yeseul Kim, Dong-Ho Jang, No-Wook Park, Hee Young Yoo
Assessment Of Landform Changes In Baramarae Tidal Flat, Korea Using Combined Analysis Of Multi-Temporal Remote Sensing Images And Grain Size Measurement Data, Yeseul Kim, Dong-Ho Jang, No-Wook Park, Hee Young Yoo
Journal of Marine Science and Technology
In this study, information on landform change in Baramarae tidal flat, Korea is analyzed using multi-temporal Landsat images and grain size measurement data. Unlike previous studies that focused on the extraction of topographic changes from intertidal digital elevation models (DEMs), information on landform change is assessed in the present study by considering both topography and surface sediment characteristics. DEMs in 2000 and 2010 were first generated using waterlines extracted from 16 Landsat images. Mean grain size distribution maps were also generated by interpolating sample data acquired in the field in 2002 and 2012. The non-spatial and spatial characteristics of the …
Impact Of Climate Change On Shihmen Reservoir Water Supply, Tai-Yi Chu, Jyun-Long Lee, Wen-Cheng Huang
Impact Of Climate Change On Shihmen Reservoir Water Supply, Tai-Yi Chu, Jyun-Long Lee, Wen-Cheng Huang
Journal of Marine Science and Technology
This study evaluated the impact of climate change on the water supply of the Shihmen reservoir in northern Taiwan. Five downscaled general circulation models that represent the daily meteorological data of 2046-2065 were adopted. The future inflow of the Shihmen reservoir was estimated using the tank model. Subsequently, the water supply risk under the given demand and operating conditions was simulated and assessed. Compared with 2004-2011, the average annual precipitation of the Shihmen watershed in 2046-2065 is lower, particularly during the wet season (May-October). Therefore, the risk to the water supply will increase in the first cropping season (from March …
Risk Maps And Coastal Defense Criteria In Taiwan, Wei-Po Huang, Lien-Kwei Chien, Lee-Hsueh Lee
Risk Maps And Coastal Defense Criteria In Taiwan, Wei-Po Huang, Lien-Kwei Chien, Lee-Hsueh Lee
Journal of Marine Science and Technology
To promote sustainable development, the Coastal Zone Management Act prescribes that coastal areas should be divided into two levels of protection zones. However, the complexity and variety of coastal defenses and land use cannot be described completely by using these two levels alone. Coastal risk maps, based on natural and manmade characters of a region, showing different degrees of vulnerability and hazard potentials, can aid in making decisions. In this study, the criteria for coastal protection and land use in terms of risk maps were adopted. A tentative risk map was presented for the northern Kaohsiung City coastal area, Southwest …
Fish Names Variability Traces The Geo-Historical Dynamics Of Moroccan Fishermen Communities, Hicham Masski, Abdelaziz Ait Hammou
Fish Names Variability Traces The Geo-Historical Dynamics Of Moroccan Fishermen Communities, Hicham Masski, Abdelaziz Ait Hammou
Journal of Ecological Anthropology
Fish vernacular names in Morocco needs a structuring system. Though used widely, these names are highly variable and do not necessarily meet trade requirements. The 138 species considered in this study have 691 vernacular names and the vernacular names lists of the 16 study sites show large disparities. The most part of this variability is of linguistic origin coming from four geographic regions and thus cultural groups. Even if possible, the adoption of a unique standard, which is the goal of the national fisheries regulation authorities, might encounter resistance to its dissemination throughout fishermen and the local population.
Changes In Sublethal Effects And Lead Accumulation In Acanthopagrus Latus Under Various Lead Concentrations And Salinities, Wen-Ching Tsui, Jiann-Chu Chen, Sha-Yen Cheng
Changes In Sublethal Effects And Lead Accumulation In Acanthopagrus Latus Under Various Lead Concentrations And Salinities, Wen-Ching Tsui, Jiann-Chu Chen, Sha-Yen Cheng
Journal of Marine Science and Technology
This study investigated the sublethal concentration of lead and calcium levels in yellowfin seabream juvenile (Acanthopagrus latus) (4.367 ± 0.470 cm; 1.408± 0.478 g) following exposure to a series of lead concentrations at various salinities (0‰, 9‰, 17‰, 25‰ and 34‰). Yellowfin seabream juveniles exposed to 17‰ salinity were the most tolerant to lead. After 96-h, the 50% lethal concentration (LC50) values were 0.33, 1.43, 3.78, 2.32 and 1.46 mg Pb2+ /L following exposure to 0‰, 9‰, 17‰, 25‰ and 34‰ salinities, respectively. The 6-, 12-, 24-, 48- and 96-h LC50 for fish exposed to 17‰ salinity were 124.67, 33.02, …
Intensive, Regular Sampling And Removal Of Modest Numbers Of Fishes Shows No Measurable Impact On Fish Populations In Three Streams Of North Georgia, Steven L. Powers
Intensive, Regular Sampling And Removal Of Modest Numbers Of Fishes Shows No Measurable Impact On Fish Populations In Three Streams Of North Georgia, Steven L. Powers
Southeastern Fishes Council Proceedings
Recent publications and restrictions on collecting by state fish and game managers indicate a growing concern regarding the impact of field sampling on native fish populations. To evaluate the validity of these concerns, data from five life-history studies conducted in Cherokee County, Georgia were examined to test the hypothesis that regular sampling has a negative impact on fish populations. Number of individuals collected was divided by time collecting to calculate catch per unit effort (CPUE) as an indicator of relative abundance for each species. The collecting sequence (i.e. the number of times a species had previously been sampled) was regressed …
Functional Characteristics And Quality Of Ultraviolet-Irradiated Partially Insoluble Fish Gelatin As Shark Fin Analogs, Yu Wei Chang, Chang Shu Liu, Chia Chi Chiang, Jenn Shou Tsa, Wen Chieh Sung
Functional Characteristics And Quality Of Ultraviolet-Irradiated Partially Insoluble Fish Gelatin As Shark Fin Analogs, Yu Wei Chang, Chang Shu Liu, Chia Chi Chiang, Jenn Shou Tsa, Wen Chieh Sung
Journal of Marine Science and Technology
Tilapia skin gelatin powder was used to parpare shark fin analogs. Experimental samples were exposed to ultraviolet (UV) irradiation at 612, 1224, 1836, 2448, 3060, and 3672 mJ/cm2 . Fish gelatin exposed to UV at 1836 mJ/cm2 became partially insoluble. UV exposure reduced the transmittance of amide I at 1630 cm-1, amide II at 1480-1575 cm-1, and amide III at 1237 cm-1 in Fourier transform infrared spectra. UV treatment at 612 mJ/cm2 significantly reduced the gel strength of fish gelatin, whereas higher UV exposure increased the gel strength. UV irradiation at up to 3060 mJ/cm2 increased the b* value (yellowness) …
Hattie Bagley, Stephanie S. Gough
Long Reach Cove, Sally Bliumis-Dunn
For The Blue Crab, J.D. Smith
The Egg Masses Of The Moon Snail, Kim Roberts
Fossil Brothers, Peter H. Spectre
In My Father's Boots, Michael G. Dunn
An Ocean Venture, Mattie Rodrigue
An Island Romance, Baron Wormser
Editor's Note, Linda Buckmaster
Temperature-Dependent Pathogenicity Of Grouper Iridovirus Of Taiwan (Tgiv), Hsin-I Liu, Ying-Chu Lin, Pinwen Peter Chiou, Hsin-Yiu Chou
Temperature-Dependent Pathogenicity Of Grouper Iridovirus Of Taiwan (Tgiv), Hsin-I Liu, Ying-Chu Lin, Pinwen Peter Chiou, Hsin-Yiu Chou
Journal of Marine Science and Technology
Grouper iridovirus of Taiwan (TGIV) is one of the most devastating infectious pathogens of grouper fry in Taiwan. As environmental temperature often plays an important role in the outbreak of diseases, we assayed the impact of different temperatures (18, 25 and 32℃) on TGIV infection both in vitro and in vivo. Cytopathic effect (CPE) characterized as cell rounding and lysis were observed in TGIV-infected grouper SB (swim bladder) cells at 25℃ and 32℃, but was absent at 18℃. With temperature rising to 32℃, the presence of pycnotic nuclei and chromatin margination became prominent in the infected cells, indicating an apoptotic …
Ld50 Of Gamma Ray Irradiation Employed In Sulawesi Medaka Oryzias Woworae, Chih-Yang Huang, Bin Lin, Kang-Wei Chang, Shyn-Shin Sheen
Ld50 Of Gamma Ray Irradiation Employed In Sulawesi Medaka Oryzias Woworae, Chih-Yang Huang, Bin Lin, Kang-Wei Chang, Shyn-Shin Sheen
Journal of Marine Science and Technology
This experiment aims to estimate the median lethal doses (LD50) of irradiation (IR) for the matured freshwater oviparous ornamental fish, Sulawesi medaka (Oryzias woworae). Both male and female were treated with 0, 10, 20, 25, 30, 35, 40, 60, 200,400, 600 and 800 Gy. Each treatment was conducted in triplicate. The 96, 168 and 336 h- LD50 of male and female were 643.1, 47.0, 33.8 and 646.8, 42.5, 35.7 Gy, respectively.
Additions To The Taiwan Eel Fauna With Five Newly Recorded Species Of Moray Eels (Anguilliformes: Muraenidae), And Redescription Of A Rare Species Gymnothorax Sagmacephalus, Kar-Hoe Loh, Kwang-Tsao Shao, Ving-Ching Chong, Hong-Ming Chen
Additions To The Taiwan Eel Fauna With Five Newly Recorded Species Of Moray Eels (Anguilliformes: Muraenidae), And Redescription Of A Rare Species Gymnothorax Sagmacephalus, Kar-Hoe Loh, Kwang-Tsao Shao, Ving-Ching Chong, Hong-Ming Chen
Journal of Marine Science and Technology
Five rare moray species: Anarchias cantonensis (Schultz), Gymnothorax dorsalis Seale, G. intesi (Fourmanoir & Rivaton), G. phasmatodes (Smith) and G. sagmacephalus (Böhlke) belonging to the subfamilies Uropterygiinae and Muraeninae are reported for the first time in the surrounding waters off Taiwan. Diagnoses of these five species, including fresh coloration and dentition, are provided. A re-description of G. sagmacephalus is provided since its original description, based on the single holotype, was incomplete specifically due to its damaged tail. With the added 12 specimens, we provided the statistics of the morphological measurements and vertebral formulae, and expanded its geographical distribution from Japan …
Bioeconomic Evaluation Of The Tiger Shrimp (Penaeus Monodon) Industry In Tra Vinh Province, Vietnam, Hieu Truong Khac, Hong Hue Tran Thi Phuong, Cheng Ting Huang, Sha Miao
Bioeconomic Evaluation Of The Tiger Shrimp (Penaeus Monodon) Industry In Tra Vinh Province, Vietnam, Hieu Truong Khac, Hong Hue Tran Thi Phuong, Cheng Ting Huang, Sha Miao
Journal of Marine Science and Technology
Analysis of costs and returns for the tiger shrimp farming industry in Tra Vinh Province, Vietnam was carried out by considering different production scales. The production scale influenced not only the cost but also the profitability. Through the results of multivariate statistical analyses, this study showed that the production cost, benefit and earning capacity varied from extensive to semi-intensive and finally to intensive systems. By means of Cobb-Douglas production function analysis, it is revealed that net revenue from increasing the production scale would increase if the input intensities of the fixed, seed and feed costs rose. More investment should be …
Effects Of Dietary Lipid Levels On Growth, Survival And Body Fatty Acid Composition Of Grouper Larvae, Epinephelus Coioides And Epinephelus Lanceolatus, Jen-Hong Chu, Shyn-Shin Sheen
Effects Of Dietary Lipid Levels On Growth, Survival And Body Fatty Acid Composition Of Grouper Larvae, Epinephelus Coioides And Epinephelus Lanceolatus, Jen-Hong Chu, Shyn-Shin Sheen
Journal of Marine Science and Technology
Two feeding experiments were conducted to study the effects of dietary lipid levels on the growth, muscle fatty acid profile and survival of 0.14 g Epinephelus coioides and 0.09 g Epinephelus lanceolatus larvae. Five semi-purified diets included 0%, 5%, 10%, 15% and 20% lipid were formulated. Each diet was randomly assigned to three replicate groups of grouper larvae. The final weight, weight gain percentage and survival of two grouper species fed diet without supplemented lipid were significantly lower than those of larvae fed treatment diets. E. coioides had lower weight gain percentage than E. lanceolatus. The weight gain percentages of …
Antioxidant Capacity And Metabolic Response Of Red Striped Snapper Lutjanus Erythropterus Fed Diet With Astaxanthin And/Or Oxidized Oil, Isagani P. Angeles, Jr., Yew-Hu Chien
Antioxidant Capacity And Metabolic Response Of Red Striped Snapper Lutjanus Erythropterus Fed Diet With Astaxanthin And/Or Oxidized Oil, Isagani P. Angeles, Jr., Yew-Hu Chien
Journal of Marine Science and Technology
This study evaluated the effects of astaxanthin (AX) on antioxidant capacity, metabolic response, and liver AX concentration of red striped snapper (Lutjanus erythropterus) (20.05 1.65 g) fed with a diet with or without high dosage of oxidized oil (OX). The commercial diet served as control (C). Fish were fed with a diet containing 240 mg/kg AX, 100 ml/kg OX, or combination of 240 mg/kg AX and 100 ml/kg OX (AX OX) for a day. Antioxidant capacity (superoxide dismutase, glutathione peroxidase, and glutathione reductase) and metabolic response (glucose, triglycerides, and lactate) were monitored at 0, 6, 12, 24, 48 …
Length-Based Estimates Of Growth And Natural Mortality For Blue Marlin (Makaira Nigricans) In The Northwest Pacific Ocean, Nan-Jay Su, Chi-Lu Sun, Chuan-Yuan Tai, Su-Zan Yeh
Length-Based Estimates Of Growth And Natural Mortality For Blue Marlin (Makaira Nigricans) In The Northwest Pacific Ocean, Nan-Jay Su, Chi-Lu Sun, Chuan-Yuan Tai, Su-Zan Yeh
Journal of Marine Science and Technology
Blue marlin is an important resource for commercial and recreational fisheries. However, several life history parameters needed for stock assessments of this species are poorly determined. Sex-specific catch-at-size data (eye fork length, EFL) for blue marlin were collected from the Taiwanese offshore longline fishery in the northwest Pacific Ocean, and analyzed using the MULTIFAN, a length-frequency analysis, to derive growth parameters. The von Bertalanffy growth parameters of blue marlin were estimated to be different between sexes. The best model for the females included 11 age-classes in the lengthfrequency data sets (asymptotic length L = 312.5 cm EFL, growth coefficient k …
Diel Change In Acoustic Characteristics And Zooplankton Composition Of The Sound Scattering Layer In I-Lan Bay In Northeastern Taiwan, Szu-Chia Kao, Ming-An Lee, Kohji Iida
Diel Change In Acoustic Characteristics And Zooplankton Composition Of The Sound Scattering Layer In I-Lan Bay In Northeastern Taiwan, Szu-Chia Kao, Ming-An Lee, Kohji Iida
Journal of Marine Science and Technology
A 36-h acoustic observation of the I-Lan Bay was con-ducted on board the Ocean Research II from June 2 to 4, 2013. The acoustic volume backscattering strength (SV) was meas-ured using a scientific echo sounder (EK500, 38 and 120 kHz) to determine the acoustic characteristics of the deep scattering layers (DSLs) before and after the vertical movement. Two DSLs were found during the daytime at a depth of 80-130 m (upper DSL, UD) and 130-230 m (lower DSL, LD), with mean SVs of approximately 78 dB (UD) and 77 dB (LD) at 38 kHz and 65 dB (UD) and −60 …
Hypoxia-Inducible Factor 2-Alpha Participates In The Regulation Of Intersegmental Vessels Angiogenesis And Neuromast Deposition, Chi-Fu Chou, Han-Jia Lin, Chih-Yu Tsai, Tzung-Yi Lin, Hsin-Yu Chung, Chia-Yin Chiang, Chung-Hao Li, Tun-Wen Pai, Chin-Hwa Hu, Wen-Shyong Tzou
Hypoxia-Inducible Factor 2-Alpha Participates In The Regulation Of Intersegmental Vessels Angiogenesis And Neuromast Deposition, Chi-Fu Chou, Han-Jia Lin, Chih-Yu Tsai, Tzung-Yi Lin, Hsin-Yu Chung, Chia-Yin Chiang, Chung-Hao Li, Tun-Wen Pai, Chin-Hwa Hu, Wen-Shyong Tzou
Journal of Marine Science and Technology
Subtle morphogenesis begins during trunk development after the segmentation period in zebrafish. Sprouting angiogenesis forms the trunk vascular system after the extension of the dorsal aorta and cardinal veins. The posterior lateral line primordium migrates from head to tail, forming the sensory organs on the skin. It is still unclear whether this morphogenesis requires several master regulators to control the ongoing process. Hypoxia-inducible factor 2-alpha (Hif2-alpha) plays an essential role in the maturation of both central neural system and digestive system during embryogenesis. We hypothesized that Hif2-alpha also regulates trunk development. Through loss-of-function experiments, we found that Hif2- alpha, but …
Extraction And Characterization Of Fucoidan From Six Brown Macroalgae, Chun-Ying Wang, Yean-Chang Chen
Extraction And Characterization Of Fucoidan From Six Brown Macroalgae, Chun-Ying Wang, Yean-Chang Chen
Journal of Marine Science and Technology
The content and composition of fucoidan in six brown macroalgae were investigated. The influence of different washing steps and two types of extraction methods on the yield and composition of fucoidan were assessed. The composition of the extract was determined by using a colorimetric method to measure the total sugar, sulfate, and protein contents of the fucoidan. The monosaccharide composition was assessed using high-performance liquid chromatography. The structures of the algal polysaccharide were studied using Fourier transform infrared-attenuated total reflectance spectroscopy. The fucoidan content extracted using method I was 13.13% (of dry weight), 24.00%, and 22.67% from Sargassum glaucescens, Sargassum …