19 May, 2016

Reproduction and life history in Tityus pusillus

Cleide Albuquerque and Andre Lira have recently published a study on reproductive strategies and life history in the buthid Tityus pusillus Poocock, 1893, the most abundant and widespread scorpion species
in the northeast Brazilian Atlantic Forest.

Two different reproductive strategies were identified in addition to the deferred reproduction previously recorded for this species. The evolution of the reproductive strategies observed is discussed.

A remarkable diversity of life history strategies has evolved among species for achieving reproductive success, including adaptive growth, protandry, iteroparity, and extra molting. Here, we report on the reproductive strategies of the litter-dwelling scorpion, Tityus (Archaeotityus) pusillus, the most abundant and widespread scorpion species in the Atlantic Forest of northeastern Brazil. We observed both iteroparity and protandry reproductive strategies in this species. Females were competent to produce up to three broods after a single insemination, and no correlation between female size and litter size was observed. Most males reached adulthood 1 month before females following four molts, characterizing protandry. Nevertheless, an extra molt was observed to occur in some males (n = 4) and females (n = 1). These findings highlight the life history traits of T. (A.) pusillus, which may imply in reproductive success and adaptation to changes in environmental conditions.

Albuquerque CMRd, Lira AFdA. Insights into reproductive strategies of Tityus (Archaeotityus) pusillus Pocock, 1893 (Scorpiones, Buthidae). Comptes Rendus - Biologies. 2016;In Press.[Subscription required for full text]

Thanks to Andre Lira for sending me his article!

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