Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)

Cannibalism by Engraulis anchoita on their eggs was investigated on the spring spawning ground of the northern population of the species during the 1993-1999 period. Egg distribution was patchy and egg cannibalism was only found in a limited number of fish. The maximum number of eggs found in a sing...

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Detalles Bibliográficos
Autor principal: Curelovich, Jéssica Natalia
Publicado: 2007
Materias:
Argentine anchovy
Cannibalism
Copepods
Eggs
Engraulis anchoita
Predation
cannibalism
crustacean
egg predation
fish
Argentina
South America
Calanoida
Clupeidae
Copepoda
Engraulidae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01657836_v83_n2-3_p253_Pajaro
http://hdl.handle.net/20.500.12110/paper_01657836_v83_n2-3_p253_Pajaro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01657836_v83_n2-3_p253_Pajaro
record_format dspace
spelling paper:paper_01657836_v83_n2-3_p253_Pajaro2023-06-08T15:15:05Z Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae) Curelovich, Jéssica Natalia Argentine anchovy Cannibalism Copepods Eggs Engraulis anchoita Predation cannibalism crustacean egg predation fish Argentina South America Calanoida Clupeidae Copepoda Engraulidae Engraulis anchoita Cannibalism by Engraulis anchoita on their eggs was investigated on the spring spawning ground of the northern population of the species during the 1993-1999 period. Egg distribution was patchy and egg cannibalism was only found in a limited number of fish. The maximum number of eggs found in a single stomach analyzed was 433. This value corresponded to 5.1% of the total number of eggs in the stomach of all fish sampled in 1993. Mean number of anchovy eggs per stomach ranged between 3.9 and 10.0 (mean S.E.: 1.5-5.1) for 1993-1996 and 1.3 (mean S.E.: 0.5) for 1999. Consumption of eggs over a 12-h feeding period represented, on average, 15-33% (mean S.E.: 6.2-20.1) of the total egg mortality within the study area in 1993-1996, but only 2% (mean S.E.: 0.8) in 1999. The mean abundance of copepods in the plankton samples (69,000 copepods/m2), especially calanoids, in 1999 was higher than in previous years (6000-53,000 copepods/m2). The same pattern was observed with the number of copepods ingested (400 copepods by fish in the 1993-1996 period and 1200 in 1999). Relationship between consumption rate and density of plankton eggs revealed a marked decrease in the egg cannibalism to low egg density values and an increase of that parameter with the increment of the plankton eggs. There was strong evidence of a decrease in egg cannibalism as copepod density increased. Our results indicate that not only intra-specific predation on anchovy eggs was high, but also anchovy egg cannibalism could be an extra source of energy when the principal food (calanoid copepods) is scarce. In areas where cannibalism was intense, that behavior supplied 91% of the daily energy necessary for reproduction. © 2006 Elsevier B.V. All rights reserved. Fil:Curelovich, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01657836_v83_n2-3_p253_Pajaro http://hdl.handle.net/20.500.12110/paper_01657836_v83_n2-3_p253_Pajaro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentine anchovy
Cannibalism
Copepods
Eggs
Engraulis anchoita
Predation
cannibalism
crustacean
egg predation
fish
Argentina
South America
Calanoida
Clupeidae
Copepoda
Engraulidae
Engraulis anchoita
spellingShingle Argentine anchovy
Cannibalism
Copepods
Eggs
Engraulis anchoita
Predation
cannibalism
crustacean
egg predation
fish
Argentina
South America
Calanoida
Clupeidae
Copepoda
Engraulidae
Engraulis anchoita
Curelovich, Jéssica Natalia
Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
topic_facet Argentine anchovy
Cannibalism
Copepods
Eggs
Engraulis anchoita
Predation
cannibalism
crustacean
egg predation
fish
Argentina
South America
Calanoida
Clupeidae
Copepoda
Engraulidae
Engraulis anchoita
description Cannibalism by Engraulis anchoita on their eggs was investigated on the spring spawning ground of the northern population of the species during the 1993-1999 period. Egg distribution was patchy and egg cannibalism was only found in a limited number of fish. The maximum number of eggs found in a single stomach analyzed was 433. This value corresponded to 5.1% of the total number of eggs in the stomach of all fish sampled in 1993. Mean number of anchovy eggs per stomach ranged between 3.9 and 10.0 (mean S.E.: 1.5-5.1) for 1993-1996 and 1.3 (mean S.E.: 0.5) for 1999. Consumption of eggs over a 12-h feeding period represented, on average, 15-33% (mean S.E.: 6.2-20.1) of the total egg mortality within the study area in 1993-1996, but only 2% (mean S.E.: 0.8) in 1999. The mean abundance of copepods in the plankton samples (69,000 copepods/m2), especially calanoids, in 1999 was higher than in previous years (6000-53,000 copepods/m2). The same pattern was observed with the number of copepods ingested (400 copepods by fish in the 1993-1996 period and 1200 in 1999). Relationship between consumption rate and density of plankton eggs revealed a marked decrease in the egg cannibalism to low egg density values and an increase of that parameter with the increment of the plankton eggs. There was strong evidence of a decrease in egg cannibalism as copepod density increased. Our results indicate that not only intra-specific predation on anchovy eggs was high, but also anchovy egg cannibalism could be an extra source of energy when the principal food (calanoid copepods) is scarce. In areas where cannibalism was intense, that behavior supplied 91% of the daily energy necessary for reproduction. © 2006 Elsevier B.V. All rights reserved.
author Curelovich, Jéssica Natalia
author_facet Curelovich, Jéssica Natalia
author_sort Curelovich, Jéssica Natalia
title Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
title_short Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
title_full Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
title_fullStr Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
title_full_unstemmed Egg cannibalism in the northern population of the Argentine anchovy, Engraulis anchoita (Clupeidae)
title_sort egg cannibalism in the northern population of the argentine anchovy, engraulis anchoita (clupeidae)
publishDate 2007
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01657836_v83_n2-3_p253_Pajaro
http://hdl.handle.net/20.500.12110/paper_01657836_v83_n2-3_p253_Pajaro
work_keys_str_mv AT curelovichjessicanatalia eggcannibalisminthenorthernpopulationoftheargentineanchovyengraulisanchoitaclupeidae
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