Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea
Stomach contents of 321 Engraulis anchoita adults were studied together with plankton samples taken simultaneously from two cruises, one carried out in Buenos Aires Province waters (34°-40°S) and the other in North Patagonian waters (41°-44°S). Stomach contents from the first cruise were dominated b...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02148358_v61_n1_p9_Capitanio |
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todo:paper_02148358_v61_n1_p9_Capitanio2023-10-03T15:10:14Z Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea Capitanio, F.L. Pájaro, M. Esnal, G.B. Appendicularia Argentine Sea Engraulis anchoita Predation South West Atlantic Ocean Amphipoda Anchoa Animalia Appendicularia (class) Argentina (fish) Bivalvia Chordata Cladocera Copepoda Engraulidae Engraulis anchoita Euphausiacea Oikopleura dioica Salpidae Urochordata Appendicularia Tunicata anchovy diet predation stomach content Atlantic, Argentine Sea Stomach contents of 321 Engraulis anchoita adults were studied together with plankton samples taken simultaneously from two cruises, one carried out in Buenos Aires Province waters (34°-40°S) and the other in North Patagonian waters (41°-44°S). Stomach contents from the first cruise were dominated by Appendicularia and Copepoda and, to a lesser extent, bivalve postlarvae, anchovy eggs, Cladocera, Salpidae, Euphausiacea and Amphipoda. The stomach repletion stages used indicated that appendicularians were an important food for anchovy; appendicularians have never been previously mentioned in anchovy diet. North Patagonian anchovies contained mainly Copepoda and Cladocera along with Appendicularia, Euphausiacea, anchovy eggs and Amphipoda. For each survey, the abundance of appendicularians in both the plankton and stomach contents showed similar patterns. The only species of Appendicularia recorded was Oikopleura dioica. In plankton, 50% of the animals were mature. However, in the stomachs they were all mature. Probably the anchovy has filtered on breeding aggregations of mature houseless individual grouped near the surface for spawning explaining the great number of non-digested individuals in the stomachs. Fil:Capitanio, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02148358_v61_n1_p9_Capitanio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Appendicularia Argentine Sea Engraulis anchoita Predation South West Atlantic Ocean Amphipoda Anchoa Animalia Appendicularia (class) Argentina (fish) Bivalvia Chordata Cladocera Copepoda Engraulidae Engraulis anchoita Euphausiacea Oikopleura dioica Salpidae Urochordata Appendicularia Tunicata anchovy diet predation stomach content Atlantic, Argentine Sea |
| spellingShingle |
Appendicularia Argentine Sea Engraulis anchoita Predation South West Atlantic Ocean Amphipoda Anchoa Animalia Appendicularia (class) Argentina (fish) Bivalvia Chordata Cladocera Copepoda Engraulidae Engraulis anchoita Euphausiacea Oikopleura dioica Salpidae Urochordata Appendicularia Tunicata anchovy diet predation stomach content Atlantic, Argentine Sea Capitanio, F.L. Pájaro, M. Esnal, G.B. Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| topic_facet |
Appendicularia Argentine Sea Engraulis anchoita Predation South West Atlantic Ocean Amphipoda Anchoa Animalia Appendicularia (class) Argentina (fish) Bivalvia Chordata Cladocera Copepoda Engraulidae Engraulis anchoita Euphausiacea Oikopleura dioica Salpidae Urochordata Appendicularia Tunicata anchovy diet predation stomach content Atlantic, Argentine Sea |
| description |
Stomach contents of 321 Engraulis anchoita adults were studied together with plankton samples taken simultaneously from two cruises, one carried out in Buenos Aires Province waters (34°-40°S) and the other in North Patagonian waters (41°-44°S). Stomach contents from the first cruise were dominated by Appendicularia and Copepoda and, to a lesser extent, bivalve postlarvae, anchovy eggs, Cladocera, Salpidae, Euphausiacea and Amphipoda. The stomach repletion stages used indicated that appendicularians were an important food for anchovy; appendicularians have never been previously mentioned in anchovy diet. North Patagonian anchovies contained mainly Copepoda and Cladocera along with Appendicularia, Euphausiacea, anchovy eggs and Amphipoda. For each survey, the abundance of appendicularians in both the plankton and stomach contents showed similar patterns. The only species of Appendicularia recorded was Oikopleura dioica. In plankton, 50% of the animals were mature. However, in the stomachs they were all mature. Probably the anchovy has filtered on breeding aggregations of mature houseless individual grouped near the surface for spawning explaining the great number of non-digested individuals in the stomachs. |
| format |
JOUR |
| author |
Capitanio, F.L. Pájaro, M. Esnal, G.B. |
| author_facet |
Capitanio, F.L. Pájaro, M. Esnal, G.B. |
| author_sort |
Capitanio, F.L. |
| title |
Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| title_short |
Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| title_full |
Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| title_fullStr |
Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| title_full_unstemmed |
Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea |
| title_sort |
appendicularians (chordata, tunicata) in the diet of anchovy (engraulis anchoita) in the argentine sea |
| url |
http://hdl.handle.net/20.500.12110/paper_02148358_v61_n1_p9_Capitanio |
| work_keys_str_mv |
AT capitaniofl appendicularianschordatatunicatainthedietofanchovyengraulisanchoitaintheargentinesea AT pajarom appendicularianschordatatunicatainthedietofanchovyengraulisanchoitaintheargentinesea AT esnalgb appendicularianschordatatunicatainthedietofanchovyengraulisanchoitaintheargentinesea |
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1807323293537009664 |