INVESTIGADORES
FERNANDEZ GIMENEZ Analia Veronica
artículos
Título:
Ontogenetic changes in the digestive system of Pleoticus muelleri (Decapoda, Penaeoidea)
Autor/es:
DÍAZ, ANA CRISTINA; FERNÁNDEZ GIMENEZ, ANALIA VERÓNICA; VELURTAS, SUSANA MARIA; FENUCCI, JORGE LINO
Revista:
INTERNATIONAL JOURNAL OF INVERTEBRATE REPRODUCTION AND DEVELOPMENT
Editorial:
Balaban
Referencias:
Lugar: Philadelphia/Rehovot; Año: 2008 vol. 52 p. 1 - 12
ISSN:
0168-8170
Resumen:
Invertebrate Reproduction and Development, 52:12 (2008) 112 1
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
, 52:12 (2008) 112 1
Balaban, Philadelphia/Rehovot
0792-4259/08/$05.00 © 2008 Balaban
Ontogenetic changes in the digestive system of Pleoticus muelleriPleoticus muelleri
(Decapoda, Penaeoidea)
A.C. DÍAZ*, A.V. FERNÁNDEZ GIMENEZ, S.M. VELURTAS and J.L. FENUCCI.C. DÍAZ*, A.V. FERNÁNDEZ GIMENEZ, S.M. VELURTAS and J.L. FENUCCI
Departamento Ciencias Marinas, Facultad Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata,
Funes 3350, 7600 Mar del Plata, Argentina
Fax: +54 (223) 475-3150; email: acdiaz@mdp.edu.ar
Received 10 January 2008; Accepted 3 September 2008
Summary
The present study describes the ontogenetic changes observed in the histology and in total protease,
trypsin, and chymotrypsin activities of the digestive system in the shrimp Pleoticus muelleriPleoticus muelleri
(Decapoda, Penaeoidea) under culture conditions. The stomach development follows the typical
pattern described for other decapods. The gland filter develops during larval stages, while the
gastric mill takes the adult shape during postlarval metamorphosis and juvenile stages. During early
larval stages, the histological structure of the anterior and lateral caeca is similar to that of the adult
midgut gland, with R, F and B cells. During late larval stages, the anterior caeca decline and take
a structure similar to that of the mesodeum and the lateral caeca expand to form the adult midgut
gland by proliferation of tubules in antero-posterior direction and from the cortical region to the
medullar region. Total protease activity was higher in postlarvae 45, no significant differences was
found in the others larval and postlarval stages. Trypsin activity was lowest in early postlarval
stages (PL1 and PL6), coinciding with the metamorphosis; enzyme activity increased in postlarvae
10 followed by a significant decrease in postlarvae 26. Chymotrypsin showed a significantly lower
activity in protozoea 3, a peak of activity between postlarvae 1 and 10, and a decrease in the
following postlarval stages. The inhibition of trypsin and chymotrypsin activities were confirmed
the presence of these serine proteases during developmental stages. The ontogenetic pattern of
P. muelleri digestive system morphology is similar to those described of others penaeoids. The
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
digestive system morphology is similar to those described of others penaeoids. The
recorded variation in enzyme activity during developmental stages may be associated with the
unique postlarval life history. This research has implications for artificial diet development in
crustacean culture and understanding of dietary shifts during larval development.
Key words: Crustacea, ontogeny, digestive system: Crustacea, ontogeny, digestive system