EspañolEnglish

Rev. biol. mar. oceanogr. 53(S1): 57-62
Nota Científica

 


Ecología trófica de dos peces de la familia Gempylidae en aguas oceánicas del Pacífico Sur Oriental

Carlos Canales-Cerro1, Patricio Barria2, Patricia Zárate3,4, Jorge Azócar3, Roberto Meléndez y Sebastian Klarian1,5,6*


1Centro de Investigación para la Sustentabilidad CIS, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Av. República 440, Santiago, Chile
2Departamento de Evaluación de Pesquerías, División de Investigación Pesquera, Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile
3Departamento de Oceanografía y Medio Ambiente, División de Investigación Pesquera, Instituto de Fomento Pesquero, Blanco 839, Valparaíso, Chile
4Facultad de Medicina Veterinaria y Agronomía, Universidad de la Américas, 7 Norte 1348, Viña del Mar, Chile
5Centro de Investigación Marina Quintay CIMARQ, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Av. Quillota 980, Viña del Mar, Chile
6Laboratorio de Análisis Isotópico, Universidad Andres Bello, Av. Quillota 980, Viña del Mar, Chile

emailButton *sebastian.klarian@unab.cl

In the Chilean coast, sharks and rays are one of the least studied fish groups, therefore quantitative data about their
parasites are scarce or almost non existing. Copepod parasites were collected from different sites along corporal body of
Prionace glauca (n= 12) and of Isurus oxyrinchus (n= 1) captured onboard cruise OCEARCH during March and April 2014. Three species belonging to the Pandaridae family were identified: Echthrogaleus coleoptratus, Dinemoura producta and Nessipus orientalis. The latter species is here recorded for the first time in Chilean waters. These copepods did not show infection site preferences along host body. Considering the wide range of hosts described for these parasite species, it is concluded they are generalist parasites of wide geographic distribution
The feeding of the escolar fishes Ruvettus pretiosus and Lepidocybium flavobrunneum has not been reported yet for southeastern Pacific waters. The main goal of this work was to study the trophic relationships using stomach contents and stable isotopes, 15N and 13C, based on mixing models. Results showed that both fish had differences in the importance of the prey, feeding strategy and habitat use. Also, they presented similar values of 15N (~20‰) and 13C (~-16‰), but a low probability of niche overlapping.

Key words:  Snake mackerels, diet, stomach content, stable isotopes, isotopic niche, Chile

pdficon-rbmo

 
atasehir evden eve nakliyat avcilar evden eve nakliyat umraniye evden eve nakliyat beylikduzu evden eve nakliyat sisli evden eve nakliyat bahcelievler evden eve nakliyat