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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

First record of intersexuality in the Amazon River shrimp Macrobrachium amazonicum (Heller,1862) (Caridea: Palaemonidae)

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Author(s):
Paschoal, Lucas R. P. ; Zara, Fernando J.
Total Authors: 2
Document type: Journal article
Source: JOURNAL OF CRUSTACEAN BIOLOGY; v. 37, n. 4, p. 507-511, JUL 2017.
Web of Science Citations: 3
Abstract

Intersexuality in a gonochoric palaemonid shrimp is reported for the first time in a wild population of Macrobrachium amazonicum (Heller,1862). This phenomenon was confirmed based on an investigation of anatomic and morphometric traits and the ultrastructure of gonopores. The intersex had both reproductive organs despite the absence of vitellogenic oocytes and spermatozoa. This individual had a vestigial male gonopore complex and female gonopores. The intersexuality was related to a genetic mutation and/or hormonal disruption because there was no detection of chemicals in the water or parasites in the samples. Non-functional hermaphroditism is a very rare event (0.06%) in M. amazonicum, indicating that this species is gonochoric, and intersex individuals are not reproductively viable. (AU)

FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
Grantee:Fernando Luis Medina Mantelatto
Support Opportunities: BIOTA-FAPESP Program - Thematic Grants