TY - JOUR
T1 - Evidence of Iteroparity in Jumbo Squid Dosidicus gigas in the Gulf of California, Mexico
AU - Pérez-Palafox, Xchel Aurora
AU - Morales-Bojórquez, Enrique
AU - Rodríguez-Jaramillo, María Del Carmen
AU - DÍaz-Uribe, Juan Gabriel
AU - Hernández-Herrera, Agustín
AU - Rodríguez-García, Oswaldo Uriel
AU - Arizmendi-Rodríguez, Dana Isela
N1 - Publisher Copyright:
© 2019 National Shellfisheries Association. All rights reserved.
PY - 2019
Y1 - 2019
N2 - The jumbo squid (Dosidicus gigas) has been considered a species with a semelparous life history, and this assumption has been erroneously adopted without histological evidence. Recent studies suggest that this species can spawn more than once during its life span. To identify the reproductive strategy of jumbo squid, qualitative and quantitative analyses were used in this study. Biological data were collected fortnightly from March 2008 to November 2009 off the coast of Santa Rosalía, Baja California Sur, Mexico. The histological analyses showed five stages of development: previtellogenesis, vitellogenesis, postvitellogenesis, spawning, and postspawning, with the simultaneous presence of oocytes at different substages. These results were confirmed by the presence of multiple cohorts of oocytes at each ovarian stage. Analysis applied to resting females of D. gigas confirmed that the postovulatory follicles were simultaneously found with previtellogenic oocytes denoting the ovarian recovery. The presence of postovulatory follicles at all ovarian stages and in individuals throughout the mantle length (ML) structure (from 32 to 82 cm) was an indicator of multiple spawning events. During 2008 and 2009, four ML groups (41.2, 48.5, 55.2, and 68.5 cm) and threeMLgroups (39.9, 47.8, and 53.9 cm) were observed, respectively. In conclusion, the evidence of postovulatory follicles in resting females of D. gigas indicates that the reproductive strategy of jumbo squid is iteroparity.
AB - The jumbo squid (Dosidicus gigas) has been considered a species with a semelparous life history, and this assumption has been erroneously adopted without histological evidence. Recent studies suggest that this species can spawn more than once during its life span. To identify the reproductive strategy of jumbo squid, qualitative and quantitative analyses were used in this study. Biological data were collected fortnightly from March 2008 to November 2009 off the coast of Santa Rosalía, Baja California Sur, Mexico. The histological analyses showed five stages of development: previtellogenesis, vitellogenesis, postvitellogenesis, spawning, and postspawning, with the simultaneous presence of oocytes at different substages. These results were confirmed by the presence of multiple cohorts of oocytes at each ovarian stage. Analysis applied to resting females of D. gigas confirmed that the postovulatory follicles were simultaneously found with previtellogenic oocytes denoting the ovarian recovery. The presence of postovulatory follicles at all ovarian stages and in individuals throughout the mantle length (ML) structure (from 32 to 82 cm) was an indicator of multiple spawning events. During 2008 and 2009, four ML groups (41.2, 48.5, 55.2, and 68.5 cm) and threeMLgroups (39.9, 47.8, and 53.9 cm) were observed, respectively. In conclusion, the evidence of postovulatory follicles in resting females of D. gigas indicates that the reproductive strategy of jumbo squid is iteroparity.
KW - Dosidicus gigas
KW - asynchronous development oocytes
KW - atretic oocyte
KW - multiple spawning
KW - postovulatory follicle
KW - reproductive strategy
UR - http://www.scopus.com/inward/record.url?scp=85064840447&partnerID=8YFLogxK
U2 - 10.2983/035.038.0114
DO - 10.2983/035.038.0114
M3 - Artículo
AN - SCOPUS:85064840447
SN - 0730-8000
VL - 38
SP - 149
EP - 162
JO - Journal of Shellfish Research
JF - Journal of Shellfish Research
IS - 1
ER -