Inter-individual variability in equine antibody responses to African snake venoms follows heavy-tailed distributions with implications for antivenom production

  Inter-individual variability in equine antibody responses to African snake venoms follows heavy-tailed distributions with implications for antivenom production Abstract Variability in the antibody response of horses used for snake antivenom manufacture is well recognized, yet its statistical structure and implications for industrial productivity remain poorly characterized. In this study, we quantified antivenom antibody titers by ELISA in a cohort of 14 horses immunized with venoms from the clinically most important snakes in sub-Saharan Africa. To integrate antibody levels with plasma availability, we calculated the Cumulative Plasma Productivity (CPP) by converting individual plasma volumes into titer-corrected equivalents and sequentially pooling these volumes according to their corrected contribution. Distributional analysis revealed right-skewed, heavy-tailed patterns better approximated by a log-normal model than by a strict Pareto (power-law) form, with approximately 20–3...

A case of gynandry and intersexuality in Phidippus regius C. L. Koch, 1846 (Araneae: Salticidae)

 


A case of gynandry and intersexuality in Phidippus regius C. L. Koch, 1846 (Araneae: Salticidae)

Abstract

A type 1 gynandromorph with intersexuality of the sexually dimorphic jumping spider Phidippus regius C. L. Koch, 1846 is reported, with photographs of the specimen (including documentation of ontogenetic colour change) both preserved and in vivo.

Sherwood & Hatcher 2026.  Daniella Sherwood, Paris Hatchard.  21 Apr 2026.  A case of gynandry and intersexuality in Phidippus regius C. L. Koch, 1846 (Araneae: Salticidae)  Peckhamia 347.1: 1-6. https://peckhamia.com/peckhamia/PECKHAMIA_347.1.pdf