In the present study, age, growth, length-weight relationship and reproduction were investigated in gilthead seabream (Sparus aurata L., 1758) collected from Beymelek Lagoon (Antalya, Turkey) between February 2006 and July 2007. The age, total length and weight of samples ranged from 0+ to 4 years, 10.6 to 35.5cm, and 18 to 928g, respectively. Growth was described by the standard form of the vo...

In the present study, age, growth, length-weight relationship and reproduction were investigated in gilthead seabream (Sparus aurata L., 1758) collected from Beymelek Lagoon (Antalya, Turkey) between February 2006 and July 2007. The age, total length and weight of samples ranged from 0+ to 4 years, 10.6 to 35.5cm, and 18 to 928g, respectively. Growth was described by the standard form of the vo...

  Estimates of age, growth parameters, length-weight relationship and length and age at first maturity of the otolithes ruber are required for fishery management. We used counting annuli on the section of sagittal otoliths to age O.ruber from the Northwest Persian Gulf in south of Iran. Estimated ages ranged from 0 to 6 years, and maximum frequency of fishes was observed in age-group 1. The val...

This study was carried out during May 2010 – April 2011 in order to determine various biological properties of red mullet occurring in the Eastern Black Sea region. The average length and weight of 1435 specimens were determined as 13.13 cm and 23.14 g, respectively. Weight-length relationship was determined as W = 0.0088 L3.0338. The age distribution of this population ranged between I and VII...

One-sided information makes a misleading impact. It must therefore be requisitely holistic. Information from an assessment of the creditworthiness of an enterprise is the same case. But the requisite holism is much less easy to attain than one-sidedness. Therefore this contribution explains creditworthiness assessment and puts it in the shade of our version of systems thinking. We find that it ...

In order to decide which is the best growth model for the tambaqui Colossoma macropomum Cuvier, 1818, we utilized 249 and 256 length-at-age ring readings in otholiths and scales respectively, for the same sample of individuals. The Schnute model was utilized and it is concluded that the Von Bertalanffy model is the most adequate for these data, because it proved highly stable for the data set, ...

Population dynamics of the queen scallop, Aequipecten opercularis, was investigated in the western English Channel off Roscoff. Annual formation of natural growth rings on the shell surface was validated by stable isotope (yO and yC) analysis. A von Bertalanffy growth function (Ht = 58.9 mm . (1 e 0.604.(t + )) was fitted to size-at-age data of 249 individuals. Annual somatic and gonad producti...

In the present study about 277 specimens of Lethrinus nebulosus were used to determine some biological parameters which are needed in stock assessment region Arabian Gulf on Saudi coasts. The period spawning was estimated using maturity indexes April, Mai and June. This species is gonochoric, nevertheless cases hermaphrodism noted. length relationships determined showing a correlation between t...