Owing to poorly mineralising structures, ageing deep-water elasmobranchs requires unconventional techniques. The aim of the present study was develop an method for goblin shark Mitsukurina owstoni (Jordan, 1898) using Alcian blue staining vertebral column. One centrum from a male individual measuring 315.2-cm total length (TL) aged with minimum age 27 years. Using Bayesian von Bertalanffy growt...

The present study reports the age, growth, and reproduction parameters of 52 brown rays (Raja miraletus) captured from Saros Bay (Northern Aegean Sea) between September 2006 -2008. males females accounted for 44.2% 55.8% sample, respectively. measured 10.5-53.5 cm (disc width, 6.5-32 cm) ranged 25.5-47.7 18-30.5 in total length (TL). equations TW=0.0017*TL3.27 TW=0.0017*DW3.38 were used to desc...

A porcentagem acumulada de germinação sementes Brachiaria brizantha tem um comportamento caracterizado por modelo sigmoidal, o qual é bem ajustado através modelos não lineares. Sendo assim, objetivo deste estudo foi avaliar a qualidade do ajuste dos lineares Logístico, Gompertz, von Bertalanffy e Brody na descrição utilizando-se os métodos superação dormência (H2SO4 KNO3) temperatura 20-35ºC. O...

Fishery stock assessment requires accurate specification of the growth function target species, and aging uncertainty is an important factor that affects estimation parameters. In this study, we used simulations to study effects two types uncertainty, error sampled age range, on parameter Von Bertalanffy function, including asymptotic length (L∞), coefficient (k), theoretical in year at zero (t...

Abstract The age and growth of Pseudoplatystoma corruscans, is analyzed on specimens landed in Puerto Antequera, Province Chaco, Argentina. study based length frequency distribution 1192 individuals marks 293 pectoral spines. Previously to assignation spines readings, we performed analyses that ruled out age-associated resorption rings corroborated the annual periodicity mark formation. average...

The alphabet effect that showed that codified law, alphabetic writing, monotheism, abstract science and deductive logic are interlinked, first proposed by McLuhan and Logan (1977), is revisited. Marshall and Eric McLuhan’s (1988) insight that alphabetic writing led to the separation of figure and ground and their interplay, as well as the emergence of visual space, are reviewed and shown to be ...

The von Koch snowflake curve is a mathematical curve, and is being used as antenna in wireless communications. There are various variants of the Koch curve scattered in literature. This paper attempts to present a critical review of the variants of Koch curve.