Jodie L. Rummer

Geographical Variation in Body Size and Sexual Size Dimorphism ( SSD ) in the Epaulette Shark ( Hemiscyllium ocellatum )

Joel Harrison Gayford, Aaron M. Hasenei, Sophia M. Emmons, Carolyn R. Wheeler et autres

ABSTRACT Aim Body size is of paramount importance to the survival of all organisms because of the intimate associations between size, physiological processes and ecology. Sexual size dimorphism (SSD: differences in size between the sexes) is a direct consequence of these ecomorphological …

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The Role of Temperature in Shaping the Nervous System Phenotype in the Epaulette Shark (Hemiscyllium ocellatum)

Emily E. Peele, Carolyn R. Wheeler, Jennifer T. Wyffels, Jodie L. Rummer et autres

INTRODUCTION: Over the last century, sea surface temperatures have increased by more than 0.5°C, with predictions suggesting an increase of 1-4°C by 2100. Oceanic warming poses significant challenges to marine species, particularly those with physiological and developmental processes that are tightly linked …

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Challenging 10 misconceptions in conservation physiology

Christine L. Madliger, Nann A Fangue, Kathleen Hunt, Edward Narayan et autres

Abstract Relative to other subdisciplines of conservation science, conservation physiology remains somewhat nascent. Although there is a growing number of successes where physiological concepts, knowledge and tools have informed conservation decisions and management actions, there also remain a number of challenges. We …

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The ideal candidate for the job: how epaulette sharks ( Hemiscyllium ocellatum ) have emerged as a model for climate-ready shark conservation

Carmen Dobszewicz, Shamil F. Debaere, Sophia M. Emmons, Joel Harrison Gayford et autres

Abstract Sharks and rays are among the most threatened vertebrates; yet, mechanistic data to predict their responses to climate change remain sparse. We argue that the epaulette shark (Hemiscyllium ocellatum) is a tractable candidate species for conservation physiology because it is small …

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First reported evidence of healing after a traumatic mandibular fracture with associated soft‐tissue avulsion in the deep‐sea sevengill shark ( Heptranchias perlo )

Andrej A. Gajić, James A. Sulikowski, Jodie L. Rummer, Joel Harrison Gayford et autres

This study presents the first documented case of healing in the deep-sea sharpnose sevengill shark (Heptranchias perlo), a poorly understood species in the Mediterranean Sea. A juvenile specimen that sustained a traumatic mandibular fracture with extensive soft-tissue avulsion, which likely resulted from …

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Role of Red Blood Cells in Gas Exchange

Mikko Nikinmaa, Colin J. Brauner, Jodie L. Rummer

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Assessing the metabolic and physiological costs of oviparity in the epaulette shark ( Hemiscyllium ocellatum )

Carolyn R. Wheeler, Cynthia A. Awruch, John W. Mandelman, Jodie L. Rummer

Reproduction in chondrichthyan fishes (sharks, rays, skates, and chimaeras) is generally assumed to be a long-term, energetically costly process, given their slow generation times. However, metabolic costs of reproduction remain poorly understood due to a lack of direct, non-lethal measurements. To address …

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Sexual Size Dimorphism in Rays and Skates (Elasmobranchii: Batoidea)

Joel Harrison Gayford, Scott G. Seamone, Duncan J. Irschick, Andrew Chin et autres

Sexual size dimorphism (SSD) is a widely observed but poorly understood phenomenon in which male and female animals differ in body size (e.g., length or mass). Despite extensive research on the interspecific distribution of SSD across various lineages, the evolutionary drivers behind …

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Mais pourquoi certains requins « freezent » lorsqu’on les retourne ?

Jodie L. Rummer, Joel Harrison Gayford

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Sharks freeze when you turn them upside down – and there’s no good reason why

Jodie L. Rummer, Joel Harrison Gayford

au (code pays fourni par la source)

A blacktip's black tip: The reliability of using dorsal‐fin patterns for photo identification of blacktip reef sharks (Carcharhinus melanopterus)

Laetitia A. M. G. Lionnet, Shamil F. Debaere, Hugo Heuls, Johann Mourier et autres

Photo identification (photo ID) has increasingly become a valuable technique serving not only to identify individual animals but also to monitor populations, track migration patterns and assess wildlife health, among others uses. Various species of sharks are amenable to photo ID, among …

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Sharks come in many different shapes and sizes. But they all follow a centuries-old mathematical rule

Jodie L. Rummer, Joel Harrison Gayford

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