RT Journal Article
T1 Age-structure, growth and reproduction of the introduced pumpkinseed (lepomis gibbosa, l. 1758) in a tributary of the Guadalquivir river (southern Spain)
A1 Gutiérrez Estrada, Juan Carlos
A1 Pulido Calvo, Inmaculada
A1 Fernández Delgado, C.
AB The age structure, growth and reproduction of Lepomis gibbosa (L. 1758) (= L. gibbosus) was studied from March 1993 toSeptember 1994 in a tributary stream of the Guadalquivir River. The maximum age observed was 5+ years both in males andfemales. In the O+ group, seasonal growth began in February and lasted 8 months. Males and females matured during their secondyear of life (l+). There were no significant differences in the overall sex-ratio, which was 1: 1.1 (677 males to 745 females).Reproductive activity started in MarcWApril and lasted until AugusUSeptember. During this period, females spawned 2 batchesof eggs. The relationship between fecundity (F) and fork length (&, mm) was: F=5.09 % 279 (1993) and F=85.81 L, ' 56(1994). The maximum contribution to the fecundity of the population was observed in the 4+ female group. The reproductiveeffort was maximun in the 3+ group. Compared with the American pumpkinseed populations that have been studied, the lifehistorypatterns of this stock are characterized by low annual growth, early maturity, reduced longevity and low fecundity.
PB Asociación Ibérica de Limnología
SN 0213-8409
SN 1989-1806 (electrónico)
YR 2000
FD 2000
LK https://hdl.handle.net/10272/22569
UL https://hdl.handle.net/10272/22569
LA eng
NO Gutiérrez Estrada, J.C., Pulido Calvo, I., Fernández Delgado, C.: "Age-structure, growth and reproduction of the introduced pumpkinseed (lepomis gibbosa, l. 1758) in a tributary of the Guadalquivir river (southern Spain)". Limnetica 19:21-29 (2000)
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026