Estimation of maturation in wild and captive ocean sunfish Mola mola

Estimation of maturation in wild and captive ocean sunfish Mola mola

We investigated gonad maturation in 180 captive Mola mola and 148 wild Mola mola. We compared the Gonad Somatic Index (GSI) based on body weight and the Gonad Index (KG) based on body length, and found a strong relationship between the two. Since it is difficult to measure the body weight of large o...

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Veröffentlicht in:Suisan Zoshoku 2007-06, Vol.55 (2)
Hauptverfasser: Nakatsubo, T.(Kamogawa Sea World, Chiba (Japan)), Kawachi, M, Mano, N, Hirose, H
Format: Artikel
Sprache:eng ; jpn
Schlagworte:
ANIMAL SALVAJE
ANIMAL SAUVAGE
BODY MEASUREMENTS
CAPTIVITE
CAPTIVITY
CAUTIVIDAD
GENITALIA
MADUREZ SEXUAL
MATURITE SEXUELLE
MEDICION DEL CUERPO
MENSURATION CORPORELLE
MOLA MOLA
SEXUAL MATURITY
WILD ANIMALS
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Zusammenfassung:We investigated gonad maturation in 180 captive Mola mola and 148 wild Mola mola. We compared the Gonad Somatic Index (GSI) based on body weight and the Gonad Index (KG) based on body length, and found a strong relationship between the two. Since it is difficult to measure the body weight of large ocean sunfish in the wild, KG is more useful for estimating maturity than GSI. This study also revealed that both GSI and KG are higher in captive specimens than in wild ones suggesting that gonad maturation of mola in captivity is faster than for mola in the wild.
ISSN:0371-4217
DOI:10.11233/aquaculturesci1953.55.259