biologia reproductiva del pulpo octupus mimus (mollusca: Cephalopoda) de la reglbn de matarani, arequipa, Peru

Translated title of the contribution: Reproductive biology of the octopus octopus mimus (mollusca cephalopoda) from the matarani region, arequipa, Peru

Victor Ishiyama, Betty Shiga, Carmen Talledo

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10 Scopus citations

Abstract

Monthly random samplings (n = 25) were taken from May 1995 to April 1996 in Matarani port, Arequipa (10°59'40" South and 72° 06'13" West). They were shown to be gonochoric and to have sexual dimorphism (the male has an arm for copulation). The sex proportion was 2,1:1,0 (male : female); eight stages of the oocyte development were also found during oogenesis. According to their reproductive behavior, the following maturity gonadic scale was established: A) undifferentiated, b) immature, c) maturation beginning, d) developing, e) mature, f) copula, g) postcopula, autofecundation and evacuation, h) postevacuation. Mature females were preferentially found in spring and summer; mature males at the end of the spring and summer; copulation occurred during summer; autofecundation and evacuation of the eggs were evident in August (50%), October (50%), November (71,4%), December (33%) and January (33%). The first maturity in males was found at 9,5 cm and in the females at 12,5 cm of dorsal length of the body. Some females showed oocytes in lysis and with advanced oogenesis beginning of a new cycle, which demonstrates that not all female die after taking care of the eggs until the final hatching.

Translated title of the contributionReproductive biology of the octopus octopus mimus (mollusca cephalopoda) from the matarani region, arequipa, Peru
Original languageSpanish
Pages (from-to)110-122
Number of pages13
JournalRevista Peruana de Biologia
Volume6
Issue number1
DOIs
StatePublished - 1999

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Copyright 2016 Elsevier B.V., All rights reserved.

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