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Registros recuperados: 9
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Age estimation and growth of some deep-sea fish from the northeast Atlantic ocean ArchiMer
Allain, Valerie; Lorance, Pascal.
Age is a necessary parameter used in population dynamics to assess the state of exploited resources. This parameter is poorly known for most deep-sea species (depth > 400 m). This work focused on age estimation from otoliths of Alepocephalus bairdii (Alepocephalidae), Coryphaenoides rupestris (Macrouridae), Helicolenus dactylopterus (Sebastidae) and Hoplostethus atlanticus (Trachichthyidae), which French fishery exploitation, off the west coasts of the British Isles, began the late 1980's. Considering otolith growth zones as annual, the four species all show high longevity: 38, 54, 43 and 130 years, respectively, together with slow growth. The differences in growth between sex were estimated and difficulties in accurately estimating the age were...
Tipo: Text Palavras-chave: Alepocephalus bairdii; Coryphaenoides rupestris; Helicolenus dactylopterus; Hoplostethus atlanticus; ANE; Slope fish; Age estimation; Otoliths.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00000/10396/7690.pdf
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Age Estimation from Ossification of the Medial Clavicular Epiphysis by Computed Tomography International Journal of Morphology
El Morsi,Doaa A.; Abo El-Atta,Hend M; ElMaadawy,Merit; Tawfik,Ahmed M; Batouty,Nihal M.
The current study intended to evaluate the accuracy of age estimation from the development of the medial clavicular epiphysis (sternal end of the clavicle) in Egyptian population using computed tomography (CT) and to develop a discriminant formula that can be used in Egyptians. The study was conducted on 142 subjects (84 males and 58 females) after taken informed consent. They were subjected to multi-slice CT on the medial end of clavicles of both sides. The results revealed that the age of non - union was seen at 8­17 years; incomplete union at 15­20 years and complete union was seen at 20 years. It is concluded that the ossification of medial clavicular end could be used for age estimation. Also CT is a good visualization tool to be used. Regression...
Tipo: Journal article Palavras-chave: Forensic science; Age estimation; Ossification status; Medial clavicular epiphysis; Sternal end of the clavicle; Identification; Computed tomography.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000400038
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Consequences of bias in age estimation on assessment of the northern stock of European hake (Merluccius merluccius) and on management advice ArchiMer
Bertignac, Michel; De Pontual, Helene.
The results of a pilot tagging study on hake (Merluccius merluccius), conducted in the northern part of the Bay of Biscay in 2002, indicate that growth rates for this stock may be currently underestimated because of biased estimates of age. The impact that such a bias may have on the stock dynamics and the trends of the key population parameters, recruitment, spawning-stock biomass (SSB), and mortality are investigated. Assuming new growth parameters, a new age-length key is derived and used to produce and catch-at-age data and abundance indices, which are then used to assess the stock. Bias in estimating age affects the absolute levels of fishing mortality and stock biomass estimates, and also impacts the trend in SSB. However, trends in fishing mortality...
Tipo: Text Palavras-chave: Tagging; Stock assessment; Simulation; Management; Growth; European hake; Age estimation.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2824.pdf
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Growth estimation of Merluccius merluccius off the northern coast of Tunisia ArchiMer
Khoufi, Widien; Dufour, Jean-louis; Jaziri, Hela; Elfehri, Safouene; Elleboode, Romain; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed Salah; Mahe, Kelig.
Growth parameters of any species are fundamental for biological or dynamic studies. The quality of the estimation for these parameters directly impacts on species stock assessment and, as a consequence, on fisheries management. In order to improve fishery and species stock management, growth analysis, especially by sex, is recommended. In this study, otoliths were used to estimate growth parameters of Merluccius merluccius Rafinesque, 1810. Hake is well-known as being a species in which otolith interpretation is extremely difficult. To estimate growth parameters, the first daily increment was validated as the tool for age determination. Otolith interpretation was done according to the last results of ICES cooperative research report. In total, a sample of...
Tipo: Text Palavras-chave: Merlucciidae; Merluccius merluccius; Tunisia; Western Mediterranean; Age estimation; Growth model; Otolith.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00191/30238/28662.pdf
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Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging ArchiMer
Mellon-duval, Capucine; De Pontual, Helene; Metral, Luisa; Quemener, Loic.
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spring 2006. The overall recapture rate was 6.5% and times-at-liberty ranged from 1 to 717 d. Growth rate in hake varied with size and sex. The estimated growth parameter (von Bertalanffy k) was estimated as double previously published values based on size frequency distribution in the area. Compared with recent growth parameters derived from the tagging experiments in the Bay of Biscay, k was estimated to be slightly lower in the Gulf of Lions. With this faster...
Tipo: Text Palavras-chave: Age estimation; European hake; Growth; Mediterranean; Tagging.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00000/11134/11532.pdf
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Morphology and Volume of Maxillary Canine Pulp Cavity for Individual Age Estimation in Forensic Dentistry International Journal of Morphology
Li,Bing; Xiu-Ping,Wu; Hong-Shangguan,; Wu,Xiao; Ke-Ming,Yun.
Age estimation plays a very important role in individual recognition in forensic dentistry. Morphological data of 3D pulp cavity of maxillary canines were acquired by oral and craniofacial CT scans. In accordance with inclusion criteria, CT data of 103 patients (51 males and 52 females) were collected at the Department of Radiology, Stomatological Hospital, Shanxi Medical University, China from September 2015 to August 2016. Mimics 17.0 software was used to measure pulp volume of maxillary canines and tooth volume, and to calculate the ratio of pulp volume/tooth volume. SPSS 16.0 software was utilized to analyze and establish database. Linear regression analysis was applied to process data and to establish a linear regression equation for individual age:...
Tipo: Journal article Palavras-chave: Forensic dentistry; Maxillary canines; Pulp cavity morphology and volume; Identification; Age estimation.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000300039
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Tag and recapture of European hake (Merluccius merluccius L.) off the Northwest Iberian Peninsula: First results support fast growth hypothesis ArchiMer
Pineiro, C; Rey, J; De Pontual, Helene; Goni, R.
In the first tagging experiment of European hake (Merluccius merluccius L.) conducted off the NW Iberian Peninsula to study hake growth in the wild we released 527 live tagged individuals. The survival rate after capture and tagging was 58%. Mortality during capture was positively correlated with depth of capture and negatively correlated with hake size. Fifteen months after tagging, seven individuals (1.3%) had been recaptured with times at liberty ranging from 29 to 466 days. We provide the first direct measurements of growth rates of Southern stock European hake in the wild and compare them with rates obtained from tagging experiments in other regions and with rates derived from conventional otolith age reading. The mean somatic growth rate of all...
Tipo: Text Palavras-chave: Northeast Atlantic; Age estimation; Tag recapture; Growth rates; European hake.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3525.pdf
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Validation of age determination using otoliths of the European anchovy (Engraulis encrasicolus L.) in the Bay of Biscay ArchiMer
Uriarte, A.; Rico, I.; Villamor, B.; Duhamel, Erwan; Duenas, C.; Aldanondo, N.; Cotano, U..
Validation of the age determination procedure using otoliths of European anchovy in the Bay of Biscay was achieved by monitoring very strong year-classes in successive spring catches and surveys, as well as the seasonal occurrence of edge types. Historical corroboration of the ageing method was obtained by cross-correlation between successive age groups by year-classes in catches and surveys (1987–2013). Summary annual growth in length is also presented. Yearly annuli consist of a hyaline zone (either single or composite) and a wide opaque zone, disrupted occasionally by some typical checks (mainly at age-0 and age-1 at peak spawning time). Age determination, given a date of capture, requires knowledge of the typical annual growth pattern of otoliths,...
Tipo: Text Palavras-chave: Age estimation; Checks; Engraulidae; Otolith formation..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00342/45343/44806.pdf
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後臼歯の萌出・磨滅によるエゾシカの令推定 : 特にX線写真を用いて OAK
三谷, 篤; 小野山, 敬一; MITANI, Atsushi; ONOYAMA, Keiichi.
Palavras-chave: 令推定; エゾシカ; 萌出・磨滅パターン; 後臼歯; X線写真; Age estimation; Cervus nippon yesoensis; Eruption wear pattern; Molar; X-ray photo.
Ano: 1997 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1336
Registros recuperados: 9
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