Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Size heterogeneity prevails over kinship in shaping cannibalism among larvae of sharptooth catfish Clarias gariepinus
Autore:
Baras, E; dAlmeida, AF;
Indirizzi:
Univ Liege, Aquaculture Res & Educ Ctr, Dept Ethol & Anim Psychol, B-4500 Tihange, Belgium Univ Liege Tihange Belgium B-4500 Anim Psychol, B-4500 Tihange, Belgium
Titolo Testata:
AQUATIC LIVING RESOURCES
fascicolo: 4, volume: 14, anno: 2001,
pagine: 251 - 256
SICI:
0990-7440(200107/08)14:4<251:SHPOKI>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SIBLING CANNIBALISM; KIN RECOGNITION; SELECTIVITY; BEHAVIOR; DYNAMICS; LAZERA; GROWTH;
Keywords:
aquaculture; cannibalism; evolution; fish; kinship;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Baras, E Univ Liege, Aquaculture Res & Educ Ctr, Dept Ethol & Anim Psychol, 10 Chemin Justice, B-4500 Tihange, Belgium Univ Liege 10 Chemin Justice Tihange Belgium B-4500 nge, Belgium
Citazione:
E. Baras e A.F. d'Almeida, "Size heterogeneity prevails over kinship in shaping cannibalism among larvae of sharptooth catfish Clarias gariepinus", AQU LIV RES, 14(4), 2001, pp. 251-256

Abstract

Because preying on close relatives may cause a loss of inclusive fitness, cannibalistic animals are generally deemed to cannibalise non-related conspecifics preferentially to kins. Whether this basic principle also applies to fish exerting intracohort cannibalism at an early developmental stage is uncertain, and more intense cannibalism among mixed progenies might just bea consequence of greater size heterogeneity. To investigate this, progenies of sharptooth catfish of equivalent initial body weights but with contrasting size heterogeneity were reared separately or in mixed groups containing equal proportions of each progeny (27 +/- 1 degreesC, 12 h light: 12 h night, 2.5 L aquaria, 100 or 200 fish(. )L(-1)). Cannibalism was monitored on a daily basis until the end of the larval stage (3-15 days after hatching). Cannibalism in mixed groups was intermediate between those in pure progenies, and was positively correlated (R-2 =0.803, P <0.01) with initial size heterogeneity, irrespectively of fish origin. This finding does not exclude that catfish larvae were able to discriminate between siblings and non-related fish, but this obviously had very little influence on cannibalism. The implications of this finding are discussed, as they apply to prey selectionin fast growing larvae, and aquaculture of catfish. (C) 2001 Ifremer/CNRS/Inra/IRD/Cemagref/Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:19:31