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Titolo:
MATING FREQUENCY AND INTERSPECIFIC MATINGS IN SOME FRESH-WATER CYCLOPOID COPEPODS
Autore:
MAIER G;
Indirizzi:
UNIV ULM,BIOL OKOL & MORPHOL TIERE ABT 3,ALBERT EINSTEIN ALLEE 11 D-89069 ULM GERMANY
Titolo Testata:
Oecologia
fascicolo: 2, volume: 101, anno: 1995,
pagine: 245 - 250
SICI:
0029-8549(1995)101:2<245:MFAIMI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEX SIZE RATIOS; CALANOID COPEPODS; CO-OCCURRENCE; PREDATION; BEHAVIOR; REPRODUCTION; POPULATION; SUCCESS; RISK;
Keywords:
MATING FREQUENCY; INTERSPECIFIC MATINGS; CYCLOPOID COPEPODS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
G. Maier, "MATING FREQUENCY AND INTERSPECIFIC MATINGS IN SOME FRESH-WATER CYCLOPOID COPEPODS", Oecologia, 101(2), 1995, pp. 245-250

Abstract

Laboratory investigations with Cyclops vicinus and Metacyclops minutus documented that mating frequency decreased significantly after the initial mating, i.e. re-mating is relatively rare in cyclopoid copepods. Re-mating is unnecessary because females are able to fertilize multiple clutches of viable eggs from one insemination. Similar sized Cyclops vicinus and Cyclops furcifer interbreed frequently. Interbreeding does not occur when size differences and taxonomic differences are as great as between C. vicinus and M. leuckarti. In C. vicinus and M. leuckarti, the duration of the last mating phase (spermatophore transfer until release of the female) and consequently the duration of the entire mating process, is different. I conclude that the low re-mating frequency in cyclopoid copepods probably evolved to accelerate clutch production in unpredictable environments and to reduce predation risk. Theoccurrence of interspecific mating discourages the co-existence of similarly sized, related species. Mating behav lour may have a considerable influence on zooplankton community structure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 08:16:27