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The influence of sex ratio on the reproduction of pirarucu, Arapaima gigas, in captivity Acta Amazonica
LIMA,Adriana Ferreira.
ABSTRACT Because sex ratio in the broodstock can influence the reproductive behaviour of a species, the influence of sex ratio on the reproductive success of pirarucu, Arapaima gigas, in captivity was assessed. Pirarucu breeders were stocked in 0.10-0.13 ha earthen ponds at three sex ratios in quadruplicate: one male to one female (1M1F); one male to two females (1M2F); and two males to one female (2M1F). Eight spawning events occurred, seven of them with the 1M1F sex ratio, which was the most successful of the three tested sex ratios.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Breeding pairs; Mating; Tropical fish cultivation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000100038
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Bird observations in the Selvagens Islands (21-23 October 1978 and 27 May-7 June 1981) [CANCAP-Project] Naturalis
Hartog, J.C. den; Norrevang, A.; Zino, P.A..
In the frame work of the CANCAP-Project of the Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands, the Salvage Islands were visited twice: in 1978 (October 21-23) and 1980 (May 26-June 7), respectively. Bird observations were made on both occassions.
Tipo: Article / Letter to the editor Palavras-chave: Ornithology; Birds; Breeding birds; Breeding pairs; Vagrant birds; Migrant birds; Roseate Terns; Sterna dougallii; Cory's Shearwater; Calonectris diomedea borealis; Short-eared owl; Asio flammeus; Migrant invations; Populations; Observations; Meteorology; New record; Salvage Islands; Macaronesia; CANCAP-Project.
Ano: 1984 URL: http://www.repository.naturalis.nl/record/658998
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