Gsp5 construct strombus4/15/2023 Molecular species attribution was completed based on morphology of fresh specimens identified by an octopus specialist and then checked against previous identification (cultivation center and GenBank sequences). Specimens previously identified as Octopus vulgaris Cuvier, 1797 were collected in two regions of southeast Brazil, in an industrial port in Progreso city (southern Gulf of Mexico) and from a fish market in Isla Mujeres, Mexico (Western Caribbean). Samples of Octopus maya Voss and Solís, 1966 were obtained from the cultivation center of the Universidad Nacional Autónoma de México (UNAM) in Sisal city. To investigate the taxonomic status of the Octopus species in the Tropical Northwestern Atlantic (TNA) and the Tropical Southwestern Atlantic (TSA), we sampled Octopus insularis Leite and Haimovici, 2008 in three areas of the northeastern Brazilian coast, four Brazilian oceanic islands and one island in Western Caribbean, Mexico. The genus Octopus has been treated as a Bcatch all^ taxon because many species have morphological similarities. The average relative fecundity was estimated at 68 to 83 and the average number oocytes per gram of ovary were 488 to 539. ![]() For individuals of a DML range of 67-85 mm fecundity varied between 2,962-8,820 oocytes. In females there were two peaks in GSI values during October and January-February. In males, no definite seasonal changes were observed in gonadosomatic index (GSI) values. Maturation and spawning occur all year round, with a peak during October and another peak during January-February. Four maturity stags were recognized for females and two for males. The ratios of males to females increased consistently with respect to weight Total weight at first maturity were 78.78g for females and 40.8 g for males. In the majority of months(Jan-June), the sex ratio was biased towards males. The reproductive biology of this species from these waters was studied from October 2001 to September 2002. The sandbird octopus Amphioctopus aegina (Gray, 1849) is one of the important octopod species in trawl catches in Mandapam waters (Palk Bay).
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