The sandbird octopus Amphioctopus aegina (Gray, 1849) is one of the important octopod species in trawl catches in Mandapam waters (Palk Bay). The reproductive biology of this species from these waters was studied from October 2001 to September 2002. In the majority of months(Jan-June), the sex ratio was biased towards 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. They are widely distributed in tropical and subtropical seas all over the world, and some species possess high ecological and economic values. Four maturity stags were recognized for females and two for males. As the largest group within Stromboidea, the family Strombidae comprises about 120 extant species ( MolluscaBase, 2022a ). Maturation and spawning occur all year round, with a peak during October and another peak during January-February. In males, no definite seasonal changes were observed in gonadosomatic index (GSI) values. Laevistrombus canarium (commonly known as the dog conch or by its better-known synonym, Strombus canarium) is a species of edible sea snail, a marine gastropod mollusc in the family Strombidae (true conches).Known from illustrations in books dating from the late 17th century, L. In this study, queen conch (Strombus gigas) tissues were analyzed for a suite of contaminants: metals, the pesticide DDT (and its degradation products), and energetic compounds (associated with munitions) from three areas around the island. In females there were two peaks in GSI values during October and January-February. For individuals of a DML range of 67-85 mm fecundity varied between 2,962-8,820 oocytes. Neodilatilabrum sowerbyorum (Visser & Man in t Veld, 2005) - NOTE: SEVERAL PROTECTED SPECIES ARE ILLUSTRATED HERE ONLY FOR IDENTIFICATION PURPOSES. The average relative fecundity was estimated at 68 to 83 and the average number oocytes per gram of ovary were 488 to 539. Maculastrombus rapanuensis Liverani, Wieneke & Kronenberg, 2021. The genus Octopus has been treated as a Bcatch all^ taxon because many species have morphological similarities. ![]() 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. 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. ![]() 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).
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