DEMOGRAFIA DE PALAEMONETES (PALAEMONETES) ARGENTINUS NOBILI (DECAPODA NATANTIA). 1. CRECIMIENTO *

RODRIGUES CAPITULO, A.; FREYRE, LR

LIMNOBIOS

Contribuciones ILPLA- Instituto de Limnología Dr. Raúl A. Ringuelet-

Lugar: La Plata; Año: 1989 vol. 2 p. 744 - 756

0325-7592

ABSTRACT:OEMOGRAPHY oe Pelacmonetcs (Palaemoneres) argentinus NOBIU (OECAPODA NATANTIA). 1. GROWTH. Frequencydistriburions of rhe males and females of P. srgentinus popularion sampled from Chascornús Pond (Buenos Airesprovince) are analized. Von Berralanffy´s model was applied wirh modificarions respece to scale rime in order toanalyze the observed deviations due to me Stop of the lenght and weight growing which takes place during unfavorabie limes of rhe year. For the reasons expressed, "´Y" was additioned to time (e), in which "´Y" = a sea(~60(e+-e)), where a and -& are respectively amplirude and phase of the sinusoid. Ir permired to cornpress rhescale time during the slow growth and to expand ir when ir was swift. The equation used there was: Lt - Lro(1 - c-k(l+>y Joro)): where 100 totallenght (mm) of cephalopereion (CP). In order to expedite the recount and measurernent of shrimps in large samples, a maximum aliquotsize wasstimated. Weight/lenght CP and lenght CP/total lenght relarionships were srudied.