Radiographic pelvimetry in 0 to 24 month-old pacas (Agouti paca, Linnaeus, 1766)

ABSTRACT The pelvimetry consists of the metric determination of the pelvis dimensions and its use is directly related to the reproduction. The cartilage closure time of the ossification centers varies according to the bone, some closing already in the uterine life and others remaining present for many years. The objective was to evaluate, radiographically, the pelvic diameters by pelvimetry during the first 24 months of life in pacas, the second lagest Brazilian rodent and an animal that has shown big recent scientific interest, aiming the estimated age determination. Twelve pacas were used, which were monthly radiographed up from birth until 24 months old, with the animals anesthetized. The pacas are dolicopelvic animals and with pelvis presenting strong tendency to constant growth along the 12 first months of age, fact that can be useful in the approximated animals’ age determination that do not have precise birth date, for example.

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Growth of Grey Kangaroos and the Reliability of Age Determination from Body Meausrements I. The Eastern Grey Kangaroo, Macropus giganteus

Wildlife Research ◽

10.1071/wr9820009 ◽

1982 ◽

Vol 9 (1) ◽

pp. 9 ◽

Cited By ~ 42

Author(s):

WE Poole ◽

SM Carpenter ◽

JT Wood

Keyword(s):

Confidence Intervals ◽

Growth Curve ◽

Age Determination ◽

Tail Length ◽

Birth Date ◽

First Year ◽

Grey Kangaroo ◽

Pass Through ◽

Join Point

Measurements of bodily parts were taken throughout life from captive male and female eastern grey kangaroos of known birth date. For each body measurement a growth curve was fitted, and confidence intervals calculated for determining the age of any new animal. A change of phase in the growth curve was apparent at the time when the young vacate the pouch. A join point in the curve was empirically estimated to occur at approximately 310 days, and the growth curve was represented by a 4-parameter non-linear model consisting of two hyperbolas constrained to pass through this common point. Tables presented permit determination of age from body measurements with corresponding confidence intervals for both males and females at 30-day intervals in the first year and less frequent intervals for the age of 15-36 months. Head and leg lengths proved to be the most reliable criteria for age determination; arm and foot length were reasonably accurate; ear length, tail length and weight were unreliable criteria.

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Growth of Grey Kangaroos and the Reliability of Age Determination from Body Measurements II.* The Western Grey Kangaroos, Macropus fuliginosus fuliginosus, M. f. melanops and M. f. ocydromus

Wildlife Research ◽

10.1071/wr9820203 ◽

1982 ◽

Vol 9 (2) ◽

pp. 203 ◽

Cited By ~ 18

Author(s):

WE Poole ◽

SM Carpenter ◽

JT Wood

Keyword(s):

Growth Curve ◽

Young Animal ◽

Age Determination ◽

Growth Curves ◽

Birth Date ◽

First Year ◽

Body Measurements ◽

Grey Kangaroo ◽

Pass Through

Seven body measurements were taken at regular intervals throughout life from both male and female western grey kangaroos of known birth date. For each sex of three subspecies and for each body measurement a growth curve was fitted, and confidence intervals calculated for determining the age of new animals. As with eastern grey kangaroos, a phase change in the growth curve was apparent at the time when the young vacate the pouch. Join points in the curve for each subspecies of western grey kangaroos were estimated empirically, as three-quarters through the interval between first emergence and final vacation of the pouch by a young animal. The growth curves were represented by a four-parameter non-linear model consisting of two hyperbolas constrained to pass through the common point. Tables presented contrast the ages at which percentile growth values are attained for each subspecies, and also provide examples of the determination of age from body measurements for both males and females, at monthly intervals during their first year. As found for the eastern grey kangaroo, head length proved to be the most reliable criterion, and all measurements of animals older than 2 years were unreliable for age determination.

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Analysis of Fibronectin and TGF-β1 Immunoexpression to Determination of Wound Vitality in Wistar Rats (Rattus norvegicus)

Journal Of Medicine & Health ◽

10.28932/jmh.v1i1.499 ◽

2015 ◽

Vol 1 (1) ◽

Author(s):

Nita Novita ◽

Hasrayati Agustina ◽

Bethy S. Hernowo ◽

Abdul H. Hassan

Keyword(s):

Rattus Norvegicus ◽

Wistar Rats ◽

Age Determination ◽

Scientific Field ◽

Wound Age ◽

Forensic Practice ◽

Randomized Design ◽

Completely Randomized Design ◽

Tgf Β1

Wound examination is indispensable in forensic practice. The scientific field of wound age determination has advanced progressively during recent years.The purpose of this study was to determine the differences of fibronectin and TGF-β1 expression in both antemortem and postmortem wounds. This study was an experimental with completely randomized design. The skin wounds (vital and postmortem) were taken from fourty Wistar rats and divided into 10 groups of rats. Immunohistochemical staining was performed to determine the differences between antemortem and postmortem wounds. The result showed that in 30 minutes after antemortem wound infliction, all of samples showed weak reactivity for fibronectin and TGF-β1 (100%). In first hour after wound infliction, 3 samples (75%) showed weakly positive and 1 sample (25%) strongly positive for fibronectin and TGF-β1. In 2 hour after wound infliction, 1 sample (25%) showed weakly positive and 3 sample (75%) strongly positive for fibronectin and TGF-β1. In 3 and 4 hour after wound infliction, all of samples strongly positive for fibronectin and TGF-β1. In postmortem wound, all of samples showed negativity for fibronectin and TGF-β1. In conclusion, fibronectin and TGF-β1 may be useful in the determination of wound vitality. Keywords: wound, fibronectin, TGF-β1, vitality

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Validation and Application of Skeletochronology for Age Determination of the Ryukyu Ground Gecko, Goniurosaurus kuroiwae (Squamata: Eublepharidae)

Asian Herpetological Research ◽

10.3724/sp.j.1245.2013.00233 ◽

2014 ◽

Vol 4 (4) ◽

pp. 233-241

Author(s):

KURITA Takaki ◽

TODA Mamoru

Keyword(s):

Age Determination

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Problems associated with the age determination of the oldest pottery yielding cultural layers at the Studenoe 1 site, Transbaikal (southern Siberia)

Quaternary International ◽

10.1016/j.quaint.2021.02.002 ◽

2021 ◽

Author(s):

Masami Izuho ◽

Fumie Iizuka ◽

Ian Buvit ◽

Mikhail V. Konstantinov

Keyword(s):

Age Determination ◽

Southern Siberia ◽

Cultural Layers

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Directly ageing the Caribbean spiny lobster, Panulirus argus with validated band counts from gastric mill ossicles

ICES Journal of Marine Science ◽

10.1093/icesjms/fsy177 ◽

2018 ◽

Vol 76 (2) ◽

pp. 442-451 ◽

Cited By ~ 7

Author(s):

Gaya Gnanalingam ◽

Mark J Butler ◽

Thomas R Matthews ◽

Emily Hutchinson ◽

Raouf Kilada

Keyword(s):

Spiny Lobster ◽

Age Determination ◽

Florida Keys ◽

Panulirus Argus ◽

Gastric Mill ◽

Coefficients Of Variation ◽

The Caribbean ◽

First Time ◽

Reader Experience

Abstract In crustaceans, ecdysis was long believed to result in the loss and replacement of all calcified structures, precluding the use of conventional ageing methods. However, the discovery of bands in the gastric ossicles of several crustaceans with some correlation with age suggests that direct age estimation may be possible. We applied this method to a tropical spiny lobster, Panulirus argus, one of the most iconic and economically valuable species in the Caribbean. The presence of growth bands was investigated using wild lobsters of unknown age and was validated with captive reared lobsters of known age (1.5–10 years) from the Florida Keys, Florida (USA). Bands were consistently identified in ptero- and zygo-cardiac ossicles of the gastric mill and did not appear to be associated with moulting. Validation with known age animals confirms that bands form annually. Counts between independent readers were reproducible with coefficients of variation ranging from 11% to 26% depending on reader experience and the structure used. This study demonstrates, for the first time, that direct age determination of P. argus is possible.

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