Leonardo Guida

Monash University (Australia) · School of Biological Sciences, Clayton

Supplementary Material 2 (Figures S1–S2 and Tables S1–S11)

We develop a potentially widely applicable framework for analysing the vulnerability, resilience risk and exposure of chondrichthyan species to all types of anthropogenic stressors in the marine environment. The approach combines the three components of widely applied vulnerability analysis (exposure, sensitivity and adaptability) (ESA) with three...

Quantifying the behavioural response of chondrichthyans to capture in longline fisheries can assist in understanding the physiological changes resulting from capture stress and ultimately aid in developing fishing practices that increase the survival of released bycatch species. Here, we evaluated the use of time-depth recorders (TDR) as a tool to...

Assessing fishing effects on chondrichthyan populations has predominantly focused on quantifying mortality rates. Consequently, sub-lethal effects of capture stress on the reproductive capacity of chondrichthyans are largely unknown. We investigated the reproductive consequences of capture on pregnant southern fiddler rays (Trygonorrhina dumerilii)...

Bycatch of marine mammals in the gillnet sector of the Southern and Eastern Scalefish and Shark Fishery in the Great Australian Bight prompted managers to assess the use of demersal automatic longlines as an alternative method to target gummy shark (Mustelus antarcticus). The school shark (Galeorhinus galeus) is a migratory species that is occasion...

Many factors influence the physiological stress response to fisheries capture in elasmobranchs. However, the influence of sea surface temperatures (SST) and behaviour are unknown and crucial considering global fishing pressures. We investigated the effect of SST and behaviour on the physiological stress response to capture of the gummy shark, Muste...

Quantifying the physiological stress response of chondrichthyans to capture has assisted the development of fishing practices conducive to their survival. However, currently used indicators of stress show significant interspecific and intraspecific variation in species’ physiological responses and tolerances to capture. To improve our understanding...

Guide to handling of captured sharks and rays to minimise injury and post-release mortality

We report the first documented case of bicephaly in a chondrichthyan, the southern fiddler ray, Trygonorrhina dumerilii, in Australian waters. Females in the latter stages of pregnancy, as confirmed by ultrasound, were captured by hand in Swan Bay, Victoria (38.252 degrees S, 144.616 degrees E) in February 2013 and transported to aquaria. Up to 10...